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trigger.c File Reference
#include "postgres.h"
#include "access/genam.h"
#include "access/heapam.h"
#include "access/sysattr.h"
#include "access/htup_details.h"
#include "access/xact.h"
#include "catalog/catalog.h"
#include "catalog/dependency.h"
#include "catalog/indexing.h"
#include "catalog/objectaccess.h"
#include "catalog/pg_constraint.h"
#include "catalog/pg_constraint_fn.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_trigger.h"
#include "catalog/pg_type.h"
#include "commands/dbcommands.h"
#include "commands/defrem.h"
#include "commands/trigger.h"
#include "executor/executor.h"
#include "miscadmin.h"
#include "nodes/bitmapset.h"
#include "nodes/makefuncs.h"
#include "optimizer/clauses.h"
#include "optimizer/var.h"
#include "parser/parse_clause.h"
#include "parser/parse_collate.h"
#include "parser/parse_func.h"
#include "parser/parse_relation.h"
#include "parser/parsetree.h"
#include "pgstat.h"
#include "rewrite/rewriteManip.h"
#include "storage/bufmgr.h"
#include "storage/lmgr.h"
#include "tcop/utility.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/bytea.h"
#include "utils/fmgroids.h"
#include "utils/inval.h"
#include "utils/lsyscache.h"
#include "utils/memutils.h"
#include "utils/rel.h"
#include "utils/snapmgr.h"
#include "utils/syscache.h"
#include "utils/tqual.h"
#include "utils/tuplestore.h"
Include dependency graph for trigger.c:

Go to the source code of this file.

Data Structures

struct  OldTriggerInfo
 
struct  SetConstraintTriggerData
 
struct  SetConstraintStateData
 
struct  AfterTriggerSharedData
 
struct  AfterTriggerEventData
 
struct  AfterTriggerEventDataOneCtid
 
struct  AfterTriggerEventDataZeroCtids
 
struct  AfterTriggerEventChunk
 
struct  AfterTriggerEventList
 
struct  AfterTriggersData
 

Macros

#define GetUpdatedColumns(relinfo, estate)   (rt_fetch((relinfo)->ri_RangeTableIndex, (estate)->es_range_table)->updatedCols)
 
#define AFTER_TRIGGER_OFFSET
 
#define AFTER_TRIGGER_DONE   0x10000000
 
#define AFTER_TRIGGER_IN_PROGRESS   0x20000000
 
#define AFTER_TRIGGER_FDW_REUSE   0x00000000
 
#define AFTER_TRIGGER_FDW_FETCH   0x80000000
 
#define AFTER_TRIGGER_1CTID   0x40000000
 
#define AFTER_TRIGGER_2CTID   0xC0000000
 
#define AFTER_TRIGGER_TUP_BITS   0xC0000000
 
#define SizeofTriggerEvent(evt)
 
#define GetTriggerSharedData(evt)   ((AfterTriggerShared) ((char *) (evt) + ((evt)->ate_flags & AFTER_TRIGGER_OFFSET)))
 
#define CHUNK_DATA_START(cptr)   ((char *) (cptr) + MAXALIGN(sizeof(AfterTriggerEventChunk)))
 
#define for_each_chunk(cptr, evtlist)   for (cptr = (evtlist).head; cptr != NULL; cptr = cptr->next)
 
#define for_each_event(eptr, cptr)
 
#define for_each_event_chunk(eptr, cptr, evtlist)   for_each_chunk(cptr, evtlist) for_each_event(eptr, cptr)
 
#define MIN_CHUNK_SIZE   1024
 
#define MAX_CHUNK_SIZE   (1024*1024)
 
#define DEFTRIG_INITALLOC   8
 

Typedefs

typedef struct
SetConstraintTriggerData 
SetConstraintTriggerData
 
typedef struct
SetConstraintTriggerData
SetConstraintTrigger
 
typedef struct
SetConstraintStateData 
SetConstraintStateData
 
typedef SetConstraintStateDataSetConstraintState
 
typedef uint32 TriggerFlags
 
typedef struct
AfterTriggerSharedData
AfterTriggerShared
 
typedef struct
AfterTriggerSharedData 
AfterTriggerSharedData
 
typedef struct
AfterTriggerEventData
AfterTriggerEvent
 
typedef struct
AfterTriggerEventData 
AfterTriggerEventData
 
typedef struct
AfterTriggerEventDataOneCtid 
AfterTriggerEventDataOneCtid
 
typedef struct
AfterTriggerEventDataZeroCtids 
AfterTriggerEventDataZeroCtids
 
typedef struct
AfterTriggerEventChunk 
AfterTriggerEventChunk
 
typedef struct
AfterTriggerEventList 
AfterTriggerEventList
 
typedef struct AfterTriggersData AfterTriggersData
 

Functions

static void ConvertTriggerToFK (CreateTrigStmt *stmt, Oid funcoid)
 
static void SetTriggerFlags (TriggerDesc *trigdesc, Trigger *trigger)
 
static HeapTuple GetTupleForTrigger (EState *estate, EPQState *epqstate, ResultRelInfo *relinfo, ItemPointer tid, LockTupleMode lockmode, TupleTableSlot **newSlot)
 
static bool TriggerEnabled (EState *estate, ResultRelInfo *relinfo, Trigger *trigger, TriggerEvent event, Bitmapset *modifiedCols, HeapTuple oldtup, HeapTuple newtup)
 
static HeapTuple ExecCallTriggerFunc (TriggerData *trigdata, int tgindx, FmgrInfo *finfo, Instrumentation *instr, MemoryContext per_tuple_context)
 
static void AfterTriggerSaveEvent (EState *estate, ResultRelInfo *relinfo, int event, bool row_trigger, HeapTuple oldtup, HeapTuple newtup, List *recheckIndexes, Bitmapset *modifiedCols)
 
static void AfterTriggerEnlargeQueryState (void)
 
ObjectAddress CreateTrigger (CreateTrigStmt *stmt, const char *queryString, Oid relOid, Oid refRelOid, Oid constraintOid, Oid indexOid, bool isInternal)
 
void RemoveTriggerById (Oid trigOid)
 
Oid get_trigger_oid (Oid relid, const char *trigname, bool missing_ok)
 
static void RangeVarCallbackForRenameTrigger (const RangeVar *rv, Oid relid, Oid oldrelid, void *arg)
 
ObjectAddress renametrig (RenameStmt *stmt)
 
void EnableDisableTrigger (Relation rel, const char *tgname, char fires_when, bool skip_system)
 
void RelationBuildTriggers (Relation relation)
 
TriggerDescCopyTriggerDesc (TriggerDesc *trigdesc)
 
void FreeTriggerDesc (TriggerDesc *trigdesc)
 
void ExecBSInsertTriggers (EState *estate, ResultRelInfo *relinfo)
 
void ExecASInsertTriggers (EState *estate, ResultRelInfo *relinfo)
 
TupleTableSlotExecBRInsertTriggers (EState *estate, ResultRelInfo *relinfo, TupleTableSlot *slot)
 
void ExecARInsertTriggers (EState *estate, ResultRelInfo *relinfo, HeapTuple trigtuple, List *recheckIndexes)
 
TupleTableSlotExecIRInsertTriggers (EState *estate, ResultRelInfo *relinfo, TupleTableSlot *slot)
 
void ExecBSDeleteTriggers (EState *estate, ResultRelInfo *relinfo)
 
void ExecASDeleteTriggers (EState *estate, ResultRelInfo *relinfo)
 
bool ExecBRDeleteTriggers (EState *estate, EPQState *epqstate, ResultRelInfo *relinfo, ItemPointer tupleid, HeapTuple fdw_trigtuple)
 
void ExecARDeleteTriggers (EState *estate, ResultRelInfo *relinfo, ItemPointer tupleid, HeapTuple fdw_trigtuple)
 
bool ExecIRDeleteTriggers (EState *estate, ResultRelInfo *relinfo, HeapTuple trigtuple)
 
void ExecBSUpdateTriggers (EState *estate, ResultRelInfo *relinfo)
 
void ExecASUpdateTriggers (EState *estate, ResultRelInfo *relinfo)
 
TupleTableSlotExecBRUpdateTriggers (EState *estate, EPQState *epqstate, ResultRelInfo *relinfo, ItemPointer tupleid, HeapTuple fdw_trigtuple, TupleTableSlot *slot)
 
void ExecARUpdateTriggers (EState *estate, ResultRelInfo *relinfo, ItemPointer tupleid, HeapTuple fdw_trigtuple, HeapTuple newtuple, List *recheckIndexes)
 
TupleTableSlotExecIRUpdateTriggers (EState *estate, ResultRelInfo *relinfo, HeapTuple trigtuple, TupleTableSlot *slot)
 
void ExecBSTruncateTriggers (EState *estate, ResultRelInfo *relinfo)
 
void ExecASTruncateTriggers (EState *estate, ResultRelInfo *relinfo)
 
static void AfterTriggerExecute (AfterTriggerEvent event, Relation rel, TriggerDesc *trigdesc, FmgrInfo *finfo, Instrumentation *instr, MemoryContext per_tuple_context, TupleTableSlot *trig_tuple_slot1, TupleTableSlot *trig_tuple_slot2)
 
static SetConstraintState SetConstraintStateCreate (int numalloc)
 
static SetConstraintState SetConstraintStateCopy (SetConstraintState state)
 
static SetConstraintState SetConstraintStateAddItem (SetConstraintState state, Oid tgoid, bool tgisdeferred)
 
static TuplestorestateGetTriggerTransitionTuplestore (Tuplestorestate **tss)
 
static bool afterTriggerCheckState (AfterTriggerShared evtshared)
 
static void afterTriggerAddEvent (AfterTriggerEventList *events, AfterTriggerEvent event, AfterTriggerShared evtshared)
 
static void afterTriggerFreeEventList (AfterTriggerEventList *events)
 
static void afterTriggerRestoreEventList (AfterTriggerEventList *events, const AfterTriggerEventList *old_events)
 
static bool afterTriggerMarkEvents (AfterTriggerEventList *events, AfterTriggerEventList *move_list, bool immediate_only)
 
static bool afterTriggerInvokeEvents (AfterTriggerEventList *events, CommandId firing_id, EState *estate, bool delete_ok)
 
void AfterTriggerBeginXact (void)
 
void AfterTriggerBeginQuery (void)
 
void AfterTriggerEndQuery (EState *estate)
 
void AfterTriggerFireDeferred (void)
 
void AfterTriggerEndXact (bool isCommit)
 
void AfterTriggerBeginSubXact (void)
 
void AfterTriggerEndSubXact (bool isCommit)
 
void AfterTriggerSetState (ConstraintsSetStmt *stmt)
 
bool AfterTriggerPendingOnRel (Oid relid)
 
Datum pg_trigger_depth (PG_FUNCTION_ARGS)
 

Variables

int SessionReplicationRole = SESSION_REPLICATION_ROLE_ORIGIN
 
static int MyTriggerDepth = 0
 
static AfterTriggersData afterTriggers
 

Macro Definition Documentation

#define AFTER_TRIGGER_1CTID   0x40000000

Definition at line 3265 of file trigger.c.

Referenced by AfterTriggerSaveEvent().

#define AFTER_TRIGGER_2CTID   0xC0000000

Definition at line 3266 of file trigger.c.

Referenced by AfterTriggerExecute(), and AfterTriggerSaveEvent().

#define AFTER_TRIGGER_DONE   0x10000000
#define AFTER_TRIGGER_FDW_FETCH   0x80000000

Definition at line 3264 of file trigger.c.

Referenced by AfterTriggerExecute(), and AfterTriggerSaveEvent().

#define AFTER_TRIGGER_FDW_REUSE   0x00000000

Definition at line 3263 of file trigger.c.

Referenced by AfterTriggerExecute(), and AfterTriggerSaveEvent().

#define AFTER_TRIGGER_IN_PROGRESS   0x20000000
#define AFTER_TRIGGER_OFFSET
Value:
0x0FFFFFFF /* must be low-order
* bits */

Definition at line 3258 of file trigger.c.

Referenced by afterTriggerAddEvent().

#define AFTER_TRIGGER_TUP_BITS   0xC0000000

Definition at line 3267 of file trigger.c.

Referenced by AfterTriggerExecute().

#define CHUNK_DATA_START (   cptr)    ((char *) (cptr) + MAXALIGN(sizeof(AfterTriggerEventChunk)))

Definition at line 3327 of file trigger.c.

Referenced by afterTriggerAddEvent(), and afterTriggerInvokeEvents().

#define DEFTRIG_INITALLOC   8
#define for_each_chunk (   cptr,
  evtlist 
)    for (cptr = (evtlist).head; cptr != NULL; cptr = cptr->next)

Definition at line 3338 of file trigger.c.

Referenced by afterTriggerInvokeEvents().

#define for_each_event (   eptr,
  cptr 
)
Value:
for (eptr = (AfterTriggerEvent) CHUNK_DATA_START(cptr); \
(char *) eptr < (cptr)->freeptr; \
eptr = (AfterTriggerEvent) (((char *) eptr) + SizeofTriggerEvent(eptr)))
#define CHUNK_DATA_START(cptr)
Definition: trigger.c:3327
#define SizeofTriggerEvent(evt)
Definition: trigger.c:3301
struct AfterTriggerEventData * AfterTriggerEvent
Definition: trigger.c:3279

Definition at line 3340 of file trigger.c.

Referenced by afterTriggerInvokeEvents().

#define for_each_event_chunk (   eptr,
  cptr,
  evtlist 
)    for_each_chunk(cptr, evtlist) for_each_event(eptr, cptr)
#define GetTriggerSharedData (   evt)    ((AfterTriggerShared) ((char *) (evt) + ((evt)->ate_flags & AFTER_TRIGGER_OFFSET)))
#define GetUpdatedColumns (   relinfo,
  estate 
)    (rt_fetch((relinfo)->ri_RangeTableIndex, (estate)->es_range_table)->updatedCols)
#define MAX_CHUNK_SIZE   (1024*1024)

Referenced by afterTriggerAddEvent().

#define MIN_CHUNK_SIZE   1024

Referenced by afterTriggerAddEvent().

#define SizeofTriggerEvent (   evt)
Value:
(((evt)->ate_flags & AFTER_TRIGGER_TUP_BITS) == AFTER_TRIGGER_2CTID ? \
((evt)->ate_flags & AFTER_TRIGGER_TUP_BITS) == AFTER_TRIGGER_1CTID ? \
#define AFTER_TRIGGER_TUP_BITS
Definition: trigger.c:3267
#define AFTER_TRIGGER_1CTID
Definition: trigger.c:3265
#define AFTER_TRIGGER_2CTID
Definition: trigger.c:3266

Definition at line 3301 of file trigger.c.

Referenced by afterTriggerAddEvent().

Typedef Documentation

Definition at line 3279 of file trigger.c.

Definition at line 3269 of file trigger.c.

Definition at line 3256 of file trigger.c.

Function Documentation

static void afterTriggerAddEvent ( AfterTriggerEventList events,
AfterTriggerEvent  event,
AfterTriggerShared  evtshared 
)
static

Definition at line 3542 of file trigger.c.

References AFTER_TRIGGER_OFFSET, ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate(), Assert, AfterTriggerEventData::ate_flags, AfterTriggerSharedData::ats_event, AfterTriggerSharedData::ats_firing_id, AfterTriggerSharedData::ats_relid, AfterTriggerSharedData::ats_tgoid, CHUNK_DATA_START, AfterTriggersData::event_cxt, AfterTriggerEventList::head, MAX_CHUNK_SIZE, MemoryContextAlloc(), Min, MIN_CHUNK_SIZE, AfterTriggerEventChunk::next, NULL, SizeofTriggerEvent, AfterTriggerEventList::tail, AfterTriggerEventList::tailfree, and TopTransactionContext.

Referenced by afterTriggerMarkEvents(), and AfterTriggerSaveEvent().

3544 {
3545  Size eventsize = SizeofTriggerEvent(event);
3546  Size needed = eventsize + sizeof(AfterTriggerSharedData);
3547  AfterTriggerEventChunk *chunk;
3548  AfterTriggerShared newshared;
3549  AfterTriggerEvent newevent;
3550 
3551  /*
3552  * If empty list or not enough room in the tail chunk, make a new chunk.
3553  * We assume here that a new shared record will always be needed.
3554  */
3555  chunk = events->tail;
3556  if (chunk == NULL ||
3557  chunk->endfree - chunk->freeptr < needed)
3558  {
3559  Size chunksize;
3560 
3561  /* Create event context if we didn't already */
3562  if (afterTriggers.event_cxt == NULL)
3565  "AfterTriggerEvents",
3567 
3568  /*
3569  * Chunk size starts at 1KB and is allowed to increase up to 1MB.
3570  * These numbers are fairly arbitrary, though there is a hard limit at
3571  * AFTER_TRIGGER_OFFSET; else we couldn't link event records to their
3572  * shared records using the available space in ate_flags. Another
3573  * constraint is that if the chunk size gets too huge, the search loop
3574  * below would get slow given a (not too common) usage pattern with
3575  * many distinct event types in a chunk. Therefore, we double the
3576  * preceding chunk size only if there weren't too many shared records
3577  * in the preceding chunk; otherwise we halve it. This gives us some
3578  * ability to adapt to the actual usage pattern of the current query
3579  * while still having large chunk sizes in typical usage. All chunk
3580  * sizes used should be MAXALIGN multiples, to ensure that the shared
3581  * records will be aligned safely.
3582  */
3583 #define MIN_CHUNK_SIZE 1024
3584 #define MAX_CHUNK_SIZE (1024*1024)
3585 
3586 #if MAX_CHUNK_SIZE > (AFTER_TRIGGER_OFFSET+1)
3587 #error MAX_CHUNK_SIZE must not exceed AFTER_TRIGGER_OFFSET
3588 #endif
3589 
3590  if (chunk == NULL)
3591  chunksize = MIN_CHUNK_SIZE;
3592  else
3593  {
3594  /* preceding chunk size... */
3595  chunksize = chunk->endptr - (char *) chunk;
3596  /* check number of shared records in preceding chunk */
3597  if ((chunk->endptr - chunk->endfree) <=
3598  (100 * sizeof(AfterTriggerSharedData)))
3599  chunksize *= 2; /* okay, double it */
3600  else
3601  chunksize /= 2; /* too many shared records */
3602  chunksize = Min(chunksize, MAX_CHUNK_SIZE);
3603  }
3604  chunk = MemoryContextAlloc(afterTriggers.event_cxt, chunksize);
3605  chunk->next = NULL;
3606  chunk->freeptr = CHUNK_DATA_START(chunk);
3607  chunk->endptr = chunk->endfree = (char *) chunk + chunksize;
3608  Assert(chunk->endfree - chunk->freeptr >= needed);
3609 
3610  if (events->head == NULL)
3611  events->head = chunk;
3612  else
3613  events->tail->next = chunk;
3614  events->tail = chunk;
3615  /* events->tailfree is now out of sync, but we'll fix it below */
3616  }
3617 
3618  /*
3619  * Try to locate a matching shared-data record already in the chunk. If
3620  * none, make a new one.
3621  */
3622  for (newshared = ((AfterTriggerShared) chunk->endptr) - 1;
3623  (char *) newshared >= chunk->endfree;
3624  newshared--)
3625  {
3626  if (newshared->ats_tgoid == evtshared->ats_tgoid &&
3627  newshared->ats_relid == evtshared->ats_relid &&
3628  newshared->ats_event == evtshared->ats_event &&
3629  newshared->ats_firing_id == 0)
3630  break;
3631  }
3632  if ((char *) newshared < chunk->endfree)
3633  {
3634  *newshared = *evtshared;
3635  newshared->ats_firing_id = 0; /* just to be sure */
3636  chunk->endfree = (char *) newshared;
3637  }
3638 
3639  /* Insert the data */
3640  newevent = (AfterTriggerEvent) chunk->freeptr;
3641  memcpy(newevent, event, eventsize);
3642  /* ... and link the new event to its shared record */
3643  newevent->ate_flags &= ~AFTER_TRIGGER_OFFSET;
3644  newevent->ate_flags |= (char *) newshared - (char *) newevent;
3645 
3646  chunk->freeptr += eventsize;
3647  events->tailfree = chunk->freeptr;
3648 }
TriggerEvent ats_event
Definition: trigger.c:3273
MemoryContext TopTransactionContext
Definition: mcxt.c:48
#define MIN_CHUNK_SIZE
TriggerFlags ate_flags
Definition: trigger.c:3283
#define CHUNK_DATA_START(cptr)
Definition: trigger.c:3327
struct AfterTriggerSharedData AfterTriggerSharedData
#define Min(x, y)
Definition: c.h:806
AfterTriggerEventChunk * tail
Definition: trigger.c:3333
struct AfterTriggerEventChunk * next
Definition: trigger.c:3320
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:165
#define SizeofTriggerEvent(evt)
Definition: trigger.c:3301
#define AFTER_TRIGGER_OFFSET
Definition: trigger.c:3258
MemoryContext AllocSetContextCreate(MemoryContext parent, const char *name, Size minContextSize, Size initBlockSize, Size maxBlockSize)
Definition: aset.c:322
#define NULL
Definition: c.h:229
#define Assert(condition)
Definition: c.h:675
size_t Size
Definition: c.h:356
CommandId ats_firing_id
Definition: trigger.c:3276
struct AfterTriggerEventData * AfterTriggerEvent
Definition: trigger.c:3279
#define MAX_CHUNK_SIZE
AfterTriggerEventChunk * head
Definition: trigger.c:3332
MemoryContext event_cxt
Definition: trigger.c:3420
void * MemoryContextAlloc(MemoryContext context, Size size)
Definition: mcxt.c:707
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
void AfterTriggerBeginQuery ( void  )

Definition at line 4168 of file trigger.c.

References AfterTriggersData::query_depth.

Referenced by CopyFrom(), create_estate_for_relation(), ExecuteTruncate(), and standard_ExecutorStart().

4169 {
4170  /* Increase the query stack depth */
4172 }
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
void AfterTriggerBeginSubXact ( void  )

Definition at line 4392 of file trigger.c.

References DEFTRIG_INITALLOC, AfterTriggersData::depth_stack, AfterTriggersData::events, AfterTriggersData::events_stack, AfterTriggersData::firing_counter, AfterTriggersData::firing_stack, GetCurrentTransactionNestLevel(), AfterTriggersData::maxtransdepth, MemoryContextSwitchTo(), NULL, palloc(), AfterTriggersData::query_depth, repalloc(), AfterTriggersData::state_stack, and TopTransactionContext.

Referenced by StartSubTransaction().

4393 {
4394  int my_level = GetCurrentTransactionNestLevel();
4395 
4396  /*
4397  * Allocate more space in the stacks if needed. (Note: because the
4398  * minimum nest level of a subtransaction is 2, we waste the first couple
4399  * entries of each array; not worth the notational effort to avoid it.)
4400  */
4401  while (my_level >= afterTriggers.maxtransdepth)
4402  {
4403  if (afterTriggers.maxtransdepth == 0)
4404  {
4405  MemoryContext old_cxt;
4406 
4408 
4409 #define DEFTRIG_INITALLOC 8
4414  afterTriggers.depth_stack = (int *)
4415  palloc(DEFTRIG_INITALLOC * sizeof(int));
4417  palloc(DEFTRIG_INITALLOC * sizeof(CommandId));
4419 
4420  MemoryContextSwitchTo(old_cxt);
4421  }
4422  else
4423  {
4424  /* repalloc will keep the stacks in the same context */
4425  int new_alloc = afterTriggers.maxtransdepth * 2;
4426 
4429  new_alloc * sizeof(SetConstraintState));
4432  new_alloc * sizeof(AfterTriggerEventList));
4433  afterTriggers.depth_stack = (int *)
4435  new_alloc * sizeof(int));
4438  new_alloc * sizeof(CommandId));
4439  afterTriggers.maxtransdepth = new_alloc;
4440  }
4441  }
4442 
4443  /*
4444  * Push the current information into the stack. The SET CONSTRAINTS state
4445  * is not saved until/unless changed. Likewise, we don't make a
4446  * per-subtransaction event context until needed.
4447  */
4448  afterTriggers.state_stack[my_level] = NULL;
4452 }
uint32 CommandId
Definition: c.h:411
MemoryContext TopTransactionContext
Definition: mcxt.c:48
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
#define DEFTRIG_INITALLOC
CommandId * firing_stack
Definition: trigger.c:3427
SetConstraintState * state_stack
Definition: trigger.c:3424
CommandId firing_counter
Definition: trigger.c:3410
AfterTriggerEventList * events_stack
Definition: trigger.c:3425
int GetCurrentTransactionNestLevel(void)
Definition: xact.c:761
#define NULL
Definition: c.h:229
void * repalloc(void *pointer, Size size)
Definition: mcxt.c:963
void * palloc(Size size)
Definition: mcxt.c:849
AfterTriggerEventList events
Definition: trigger.c:3412
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
void AfterTriggerBeginXact ( void  )

Definition at line 4130 of file trigger.c.

References Assert, AfterTriggersData::depth_stack, AfterTriggersData::event_cxt, AfterTriggersData::events, AfterTriggersData::events_stack, AfterTriggersData::fdw_tuplestores, AfterTriggersData::firing_counter, AfterTriggersData::firing_stack, AfterTriggerEventList::head, AfterTriggersData::maxquerydepth, AfterTriggersData::maxtransdepth, AfterTriggersData::new_tuplestores, NULL, AfterTriggersData::old_tuplestores, AfterTriggersData::query_depth, AfterTriggersData::query_stack, AfterTriggersData::state, and AfterTriggersData::state_stack.

Referenced by StartTransaction().

4131 {
4132  /*
4133  * Initialize after-trigger state structure to empty
4134  */
4135  afterTriggers.firing_counter = (CommandId) 1; /* mustn't be 0 */
4137 
4138  /*
4139  * Verify that there is no leftover state remaining. If these assertions
4140  * trip, it means that AfterTriggerEndXact wasn't called or didn't clean
4141  * up properly.
4142  */
4156 }
uint32 CommandId
Definition: c.h:411
Tuplestorestate ** old_tuplestores
Definition: trigger.c:3417
CommandId * firing_stack
Definition: trigger.c:3427
SetConstraintState * state_stack
Definition: trigger.c:3424
SetConstraintState state
Definition: trigger.c:3411
CommandId firing_counter
Definition: trigger.c:3410
AfterTriggerEventList * events_stack
Definition: trigger.c:3425
#define NULL
Definition: c.h:229
#define Assert(condition)
Definition: c.h:675
AfterTriggerEventChunk * head
Definition: trigger.c:3332
MemoryContext event_cxt
Definition: trigger.c:3420
Tuplestorestate ** fdw_tuplestores
Definition: trigger.c:3415
AfterTriggerEventList events
Definition: trigger.c:3412
AfterTriggerEventList * query_stack
Definition: trigger.c:3414
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
Tuplestorestate ** new_tuplestores
Definition: trigger.c:3418
static bool afterTriggerCheckState ( AfterTriggerShared  evtshared)
static

Definition at line 3496 of file trigger.c.

References AFTER_TRIGGER_DEFERRABLE, AFTER_TRIGGER_INITDEFERRED, SetConstraintStateData::all_isdeferred, SetConstraintStateData::all_isset, AfterTriggerSharedData::ats_event, AfterTriggerSharedData::ats_tgoid, i, NULL, SetConstraintStateData::numstates, SetConstraintTriggerData::sct_tgisdeferred, SetConstraintTriggerData::sct_tgoid, AfterTriggersData::state, and SetConstraintStateData::trigstates.

Referenced by afterTriggerMarkEvents().

3497 {
3498  Oid tgoid = evtshared->ats_tgoid;
3500  int i;
3501 
3502  /*
3503  * For not-deferrable triggers (i.e. normal AFTER ROW triggers and
3504  * constraints declared NOT DEFERRABLE), the state is always false.
3505  */
3506  if ((evtshared->ats_event & AFTER_TRIGGER_DEFERRABLE) == 0)
3507  return false;
3508 
3509  /*
3510  * If constraint state exists, SET CONSTRAINTS might have been executed
3511  * either for this trigger or for all triggers.
3512  */
3513  if (state != NULL)
3514  {
3515  /* Check for SET CONSTRAINTS for this specific trigger. */
3516  for (i = 0; i < state->numstates; i++)
3517  {
3518  if (state->trigstates[i].sct_tgoid == tgoid)
3519  return state->trigstates[i].sct_tgisdeferred;
3520  }
3521 
3522  /* Check for SET CONSTRAINTS ALL. */
3523  if (state->all_isset)
3524  return state->all_isdeferred;
3525  }
3526 
3527  /*
3528  * Otherwise return the default state for the trigger.
3529  */
3530  return ((evtshared->ats_event & AFTER_TRIGGER_INITDEFERRED) != 0);
3531 }
TriggerEvent ats_event
Definition: trigger.c:3273
#define AFTER_TRIGGER_INITDEFERRED
Definition: trigger.h:68
#define AFTER_TRIGGER_DEFERRABLE
Definition: trigger.h:67
SetConstraintTriggerData trigstates[FLEXIBLE_ARRAY_MEMBER]
Definition: trigger.c:3220
unsigned int Oid
Definition: postgres_ext.h:31
SetConstraintState state
Definition: trigger.c:3411
#define NULL
Definition: c.h:229
Definition: regguts.h:298
int i
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
void AfterTriggerEndQuery ( EState estate)

Definition at line 4188 of file trigger.c.

References afterTriggerFreeEventList(), afterTriggerInvokeEvents(), afterTriggerMarkEvents(), Assert, AfterTriggersData::events, AfterTriggersData::fdw_tuplestores, AfterTriggersData::firing_counter, AfterTriggersData::maxquerydepth, AfterTriggersData::new_tuplestores, NULL, AfterTriggersData::old_tuplestores, AfterTriggersData::query_depth, AfterTriggersData::query_stack, and tuplestore_end().

Referenced by apply_handle_delete(), apply_handle_insert(), apply_handle_update(), CopyFrom(), ExecuteTruncate(), and standard_ExecutorFinish().

4189 {
4190  AfterTriggerEventList *events;
4191  Tuplestorestate *fdw_tuplestore;
4192  Tuplestorestate *old_tuplestore;
4193  Tuplestorestate *new_tuplestore;
4194 
4195  /* Must be inside a query, too */
4197 
4198  /*
4199  * If we never even got as far as initializing the event stack, there
4200  * certainly won't be any events, so exit quickly.
4201  */
4203  {
4205  return;
4206  }
4207 
4208  /*
4209  * Process all immediate-mode triggers queued by the query, and move the
4210  * deferred ones to the main list of deferred events.
4211  *
4212  * Notice that we decide which ones will be fired, and put the deferred
4213  * ones on the main list, before anything is actually fired. This ensures
4214  * reasonably sane behavior if a trigger function does SET CONSTRAINTS ...
4215  * IMMEDIATE: all events we have decided to defer will be available for it
4216  * to fire.
4217  *
4218  * We loop in case a trigger queues more events at the same query level.
4219  * Ordinary trigger functions, including all PL/pgSQL trigger functions,
4220  * will instead fire any triggers in a dedicated query level. Foreign key
4221  * enforcement triggers do add to the current query level, thanks to their
4222  * passing fire_triggers = false to SPI_execute_snapshot(). Other
4223  * C-language triggers might do likewise. Be careful here: firing a
4224  * trigger could result in query_stack being repalloc'd, so we can't save
4225  * its address across afterTriggerInvokeEvents calls.
4226  *
4227  * If we find no firable events, we don't have to increment
4228  * firing_counter.
4229  */
4230  for (;;)
4231  {
4233  if (afterTriggerMarkEvents(events, &afterTriggers.events, true))
4234  {
4235  CommandId firing_id = afterTriggers.firing_counter++;
4236 
4237  /* OK to delete the immediate events after processing them */
4238  if (afterTriggerInvokeEvents(events, firing_id, estate, true))
4239  break; /* all fired */
4240  }
4241  else
4242  break;
4243  }
4244 
4245  /* Release query-local storage for events, including tuplestore if any */
4247  if (fdw_tuplestore)
4248  {
4249  tuplestore_end(fdw_tuplestore);
4251  }
4253  if (old_tuplestore)
4254  {
4255  tuplestore_end(old_tuplestore);
4257  }
4259  if (new_tuplestore)
4260  {
4261  tuplestore_end(new_tuplestore);
4263  }
4265 
4267 }
uint32 CommandId
Definition: c.h:411
Tuplestorestate ** old_tuplestores
Definition: trigger.c:3417
static bool afterTriggerInvokeEvents(AfterTriggerEventList *events, CommandId firing_id, EState *estate, bool delete_ok)
Definition: trigger.c:3994
static void afterTriggerFreeEventList(AfterTriggerEventList *events)
Definition: trigger.c:3657
CommandId firing_counter
Definition: trigger.c:3410
#define NULL
Definition: c.h:229
#define Assert(condition)
Definition: c.h:675
void tuplestore_end(Tuplestorestate *state)
Definition: tuplestore.c:453
static bool afterTriggerMarkEvents(AfterTriggerEventList *events, AfterTriggerEventList *move_list, bool immediate_only)
Definition: trigger.c:3922
Tuplestorestate ** fdw_tuplestores
Definition: trigger.c:3415
AfterTriggerEventList events
Definition: trigger.c:3412
AfterTriggerEventList * query_stack
Definition: trigger.c:3414
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
Tuplestorestate ** new_tuplestores
Definition: trigger.c:3418
void AfterTriggerEndSubXact ( bool  isCommit)

Definition at line 4460 of file trigger.c.

References AFTER_TRIGGER_DONE, AFTER_TRIGGER_IN_PROGRESS, afterTriggerFreeEventList(), afterTriggerRestoreEventList(), Assert, AfterTriggerEventData::ate_flags, AfterTriggerSharedData::ats_firing_id, AfterTriggersData::depth_stack, AfterTriggersData::events, AfterTriggersData::events_stack, AfterTriggersData::fdw_tuplestores, AfterTriggersData::firing_stack, for_each_event_chunk, GetCurrentTransactionNestLevel(), GetTriggerSharedData, AfterTriggersData::maxquerydepth, AfterTriggersData::maxtransdepth, AfterTriggersData::new_tuplestores, NULL, AfterTriggersData::old_tuplestores, pfree(), AfterTriggersData::query_depth, AfterTriggersData::query_stack, AfterTriggersData::state, AfterTriggersData::state_stack, and tuplestore_end().

Referenced by AbortSubTransaction(), and CommitSubTransaction().

4461 {
4462  int my_level = GetCurrentTransactionNestLevel();
4464  AfterTriggerEvent event;
4465  AfterTriggerEventChunk *chunk;
4466  CommandId subxact_firing_id;
4467 
4468  /*
4469  * Pop the prior state if needed.
4470  */
4471  if (isCommit)
4472  {
4473  Assert(my_level < afterTriggers.maxtransdepth);
4474  /* If we saved a prior state, we don't need it anymore */
4475  state = afterTriggers.state_stack[my_level];
4476  if (state != NULL)
4477  pfree(state);
4478  /* this avoids double pfree if error later: */
4479  afterTriggers.state_stack[my_level] = NULL;
4481  afterTriggers.depth_stack[my_level]);
4482  }
4483  else
4484  {
4485  /*
4486  * Aborting. It is possible subxact start failed before calling
4487  * AfterTriggerBeginSubXact, in which case we mustn't risk touching
4488  * stack levels that aren't there.
4489  */
4490  if (my_level >= afterTriggers.maxtransdepth)
4491  return;
4492 
4493  /*
4494  * Release any event lists from queries being aborted, and restore
4495  * query_depth to its pre-subxact value. This assumes that a
4496  * subtransaction will not add events to query levels started in a
4497  * earlier transaction state.
4498  */
4500  {
4502  {
4503  Tuplestorestate *ts;
4504 
4506  if (ts)
4507  {
4508  tuplestore_end(ts);
4510  }
4512  if (ts)
4513  {
4514  tuplestore_end(ts);
4516  }
4518  if (ts)
4519  {
4520  tuplestore_end(ts);
4522  }
4523 
4525  }
4526 
4528  }
4530  afterTriggers.depth_stack[my_level]);
4531 
4532  /*
4533  * Restore the global deferred-event list to its former length,
4534  * discarding any events queued by the subxact.
4535  */
4537  &afterTriggers.events_stack[my_level]);
4538 
4539  /*
4540  * Restore the trigger state. If the saved state is NULL, then this
4541  * subxact didn't save it, so it doesn't need restoring.
4542  */
4543  state = afterTriggers.state_stack[my_level];
4544  if (state != NULL)
4545  {
4547  afterTriggers.state = state;
4548  }
4549  /* this avoids double pfree if error later: */
4550  afterTriggers.state_stack[my_level] = NULL;
4551 
4552  /*
4553  * Scan for any remaining deferred events that were marked DONE or IN
4554  * PROGRESS by this subxact or a child, and un-mark them. We can
4555  * recognize such events because they have a firing ID greater than or
4556  * equal to the firing_counter value we saved at subtransaction start.
4557  * (This essentially assumes that the current subxact includes all
4558  * subxacts started after it.)
4559  */
4560  subxact_firing_id = afterTriggers.firing_stack[my_level];
4562  {
4563  AfterTriggerShared evtshared = GetTriggerSharedData(event);
4564 
4565  if (event->ate_flags &
4567  {
4568  if (evtshared->ats_firing_id >= subxact_firing_id)
4569  event->ate_flags &=
4571  }
4572  }
4573  }
4574 }
uint32 CommandId
Definition: c.h:411
Tuplestorestate ** old_tuplestores
Definition: trigger.c:3417
TriggerFlags ate_flags
Definition: trigger.c:3283
#define AFTER_TRIGGER_DONE
Definition: trigger.c:3260
#define for_each_event_chunk(eptr, cptr, evtlist)
Definition: trigger.c:3345
CommandId * firing_stack
Definition: trigger.c:3427
#define GetTriggerSharedData(evt)
Definition: trigger.c:3308
void pfree(void *pointer)
Definition: mcxt.c:950
SetConstraintState * state_stack
Definition: trigger.c:3424
SetConstraintState state
Definition: trigger.c:3411
static void afterTriggerFreeEventList(AfterTriggerEventList *events)
Definition: trigger.c:3657
AfterTriggerEventList * events_stack
Definition: trigger.c:3425
int GetCurrentTransactionNestLevel(void)
Definition: xact.c:761
#define NULL
Definition: c.h:229
#define Assert(condition)
Definition: c.h:675
Definition: regguts.h:298
void tuplestore_end(Tuplestorestate *state)
Definition: tuplestore.c:453
static void afterTriggerRestoreEventList(AfterTriggerEventList *events, const AfterTriggerEventList *old_events)
Definition: trigger.c:3680
CommandId ats_firing_id
Definition: trigger.c:3276
#define AFTER_TRIGGER_IN_PROGRESS
Definition: trigger.c:3261
Tuplestorestate ** fdw_tuplestores
Definition: trigger.c:3415
AfterTriggerEventList events
Definition: trigger.c:3412
AfterTriggerEventList * query_stack
Definition: trigger.c:3414
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
Tuplestorestate ** new_tuplestores
Definition: trigger.c:3418
void AfterTriggerEndXact ( bool  isCommit)

Definition at line 4338 of file trigger.c.

References AfterTriggersData::depth_stack, AfterTriggersData::event_cxt, AfterTriggersData::events, AfterTriggersData::events_stack, AfterTriggersData::fdw_tuplestores, AfterTriggersData::firing_stack, AfterTriggerEventList::head, AfterTriggersData::maxquerydepth, AfterTriggersData::maxtransdepth, MemoryContextDelete(), AfterTriggersData::new_tuplestores, NULL, AfterTriggersData::old_tuplestores, AfterTriggersData::query_depth, AfterTriggersData::query_stack, AfterTriggersData::state, AfterTriggersData::state_stack, AfterTriggerEventList::tail, and AfterTriggerEventList::tailfree.

Referenced by AbortTransaction(), CommitTransaction(), and PrepareTransaction().

4339 {
4340  /*
4341  * Forget the pending-events list.
4342  *
4343  * Since all the info is in TopTransactionContext or children thereof, we
4344  * don't really need to do anything to reclaim memory. However, the
4345  * pending-events list could be large, and so it's useful to discard it as
4346  * soon as possible --- especially if we are aborting because we ran out
4347  * of memory for the list!
4348  */
4350  {
4356  }
4357 
4358  /*
4359  * Forget any subtransaction state as well. Since this can't be very
4360  * large, we let the eventual reset of TopTransactionContext free the
4361  * memory instead of doing it here.
4362  */
4368 
4369 
4370  /*
4371  * Forget the query stack and constraint-related state information. As
4372  * with the subtransaction state information, we don't bother freeing the
4373  * memory here.
4374  */
4381 
4382  /* No more afterTriggers manipulation until next transaction starts. */
4384 }
Tuplestorestate ** old_tuplestores
Definition: trigger.c:3417
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:200
AfterTriggerEventChunk * tail
Definition: trigger.c:3333
CommandId * firing_stack
Definition: trigger.c:3427
SetConstraintState * state_stack
Definition: trigger.c:3424
SetConstraintState state
Definition: trigger.c:3411
AfterTriggerEventList * events_stack
Definition: trigger.c:3425
#define NULL
Definition: c.h:229
AfterTriggerEventChunk * head
Definition: trigger.c:3332
MemoryContext event_cxt
Definition: trigger.c:3420
Tuplestorestate ** fdw_tuplestores
Definition: trigger.c:3415
AfterTriggerEventList events
Definition: trigger.c:3412
AfterTriggerEventList * query_stack
Definition: trigger.c:3414
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
Tuplestorestate ** new_tuplestores
Definition: trigger.c:3418
static void AfterTriggerEnlargeQueryState ( void  )
static

Definition at line 4586 of file trigger.c.

References Assert, AfterTriggersData::fdw_tuplestores, AfterTriggerEventList::head, Max, AfterTriggersData::maxquerydepth, MemoryContextAlloc(), MemoryContextAllocZero(), AfterTriggersData::new_tuplestores, NULL, AfterTriggersData::old_tuplestores, AfterTriggersData::query_depth, AfterTriggersData::query_stack, repalloc(), AfterTriggerEventList::tail, AfterTriggerEventList::tailfree, and TopTransactionContext.

Referenced by AfterTriggerSaveEvent().

4587 {
4588  int init_depth = afterTriggers.maxquerydepth;
4589 
4591 
4592  if (afterTriggers.maxquerydepth == 0)
4593  {
4594  int new_alloc = Max(afterTriggers.query_depth + 1, 8);
4595 
4598  new_alloc * sizeof(AfterTriggerEventList));
4601  new_alloc * sizeof(Tuplestorestate *));
4604  new_alloc * sizeof(Tuplestorestate *));
4607  new_alloc * sizeof(Tuplestorestate *));
4608  afterTriggers.maxquerydepth = new_alloc;
4609  }
4610  else
4611  {
4612  /* repalloc will keep the stack in the same context */
4613  int old_alloc = afterTriggers.maxquerydepth;
4614  int new_alloc = Max(afterTriggers.query_depth + 1,
4615  old_alloc * 2);
4616 
4619  new_alloc * sizeof(AfterTriggerEventList));
4622  new_alloc * sizeof(Tuplestorestate *));
4625  new_alloc * sizeof(Tuplestorestate *));
4628  new_alloc * sizeof(Tuplestorestate *));
4629  /* Clear newly-allocated slots for subsequent lazy initialization. */
4630  memset(afterTriggers.fdw_tuplestores + old_alloc,
4631  0, (new_alloc - old_alloc) * sizeof(Tuplestorestate *));
4632  memset(afterTriggers.old_tuplestores + old_alloc,
4633  0, (new_alloc - old_alloc) * sizeof(Tuplestorestate *));
4634  memset(afterTriggers.new_tuplestores + old_alloc,
4635  0, (new_alloc - old_alloc) * sizeof(Tuplestorestate *));
4636  afterTriggers.maxquerydepth = new_alloc;
4637  }
4638 
4639  /* Initialize new query lists to empty */
4640  while (init_depth < afterTriggers.maxquerydepth)
4641  {
4642  AfterTriggerEventList *events;
4643 
4644  events = &afterTriggers.query_stack[init_depth];
4645  events->head = NULL;
4646  events->tail = NULL;
4647  events->tailfree = NULL;
4648 
4649  ++init_depth;
4650  }
4651 }
Tuplestorestate ** old_tuplestores
Definition: trigger.c:3417
MemoryContext TopTransactionContext
Definition: mcxt.c:48
AfterTriggerEventChunk * tail
Definition: trigger.c:3333
void * MemoryContextAllocZero(MemoryContext context, Size size)
Definition: mcxt.c:742
#define Max(x, y)
Definition: c.h:800
#define NULL
Definition: c.h:229
#define Assert(condition)
Definition: c.h:675
void * repalloc(void *pointer, Size size)
Definition: mcxt.c:963
AfterTriggerEventChunk * head
Definition: trigger.c:3332
void * MemoryContextAlloc(MemoryContext context, Size size)
Definition: mcxt.c:707
Tuplestorestate ** fdw_tuplestores
Definition: trigger.c:3415
AfterTriggerEventList * query_stack
Definition: trigger.c:3414
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
Tuplestorestate ** new_tuplestores
Definition: trigger.c:3418
static void AfterTriggerExecute ( AfterTriggerEvent  event,
Relation  rel,
TriggerDesc trigdesc,
FmgrInfo finfo,
Instrumentation instr,
MemoryContext  per_tuple_context,
TupleTableSlot trig_tuple_slot1,
TupleTableSlot trig_tuple_slot2 
)
static

Definition at line 3735 of file trigger.c.

References AFTER_TRIGGER_2CTID, AFTER_TRIGGER_FDW_FETCH, AFTER_TRIGGER_FDW_REUSE, AFTER_TRIGGER_TUP_BITS, AfterTriggerEventData::ate_ctid1, AfterTriggerEventData::ate_ctid2, AfterTriggerEventData::ate_flags, AfterTriggerSharedData::ats_event, AfterTriggerSharedData::ats_tgoid, elog, ERROR, ExecCallTriggerFunc(), ExecMaterializeSlot(), AfterTriggersData::fdw_tuplestores, GetTriggerSharedData, GetTriggerTransitionTuplestore(), heap_fetch(), heap_freetuple(), InstrStartNode(), InstrStopNode(), InvalidBuffer, ItemPointerCopy, ItemPointerIsValid, MemoryContextReset(), AfterTriggersData::new_tuplestores, NULL, TriggerDesc::numtriggers, AfterTriggersData::old_tuplestores, ReleaseBuffer(), SnapshotAny, HeapTupleData::t_self, T_TriggerData, TriggerData::tg_event, TriggerData::tg_newtable, TriggerData::tg_newtuple, TriggerData::tg_newtuplebuf, TriggerData::tg_oldtable, TriggerData::tg_relation, TriggerData::tg_trigger, TriggerData::tg_trigtuple, TriggerData::tg_trigtuplebuf, Trigger::tgnewtable, Trigger::tgoid, Trigger::tgoldtable, TRIGGER_EVENT_OPMASK, TRIGGER_EVENT_ROW, TRIGGER_EVENT_UPDATE, TriggerDesc::triggers, tuplestore_gettupleslot(), and TriggerData::type.

Referenced by afterTriggerInvokeEvents().

3741 {
3742  AfterTriggerShared evtshared = GetTriggerSharedData(event);
3743  Oid tgoid = evtshared->ats_tgoid;
3744  TriggerData LocTriggerData;
3745  HeapTupleData tuple1;
3746  HeapTupleData tuple2;
3747  HeapTuple rettuple;
3748  Buffer buffer1 = InvalidBuffer;
3749  Buffer buffer2 = InvalidBuffer;
3750  int tgindx;
3751 
3752  /*
3753  * Locate trigger in trigdesc.
3754  */
3755  LocTriggerData.tg_trigger = NULL;
3756  for (tgindx = 0; tgindx < trigdesc->numtriggers; tgindx++)
3757  {
3758  if (trigdesc->triggers[tgindx].tgoid == tgoid)
3759  {
3760  LocTriggerData.tg_trigger = &(trigdesc->triggers[tgindx]);
3761  break;
3762  }
3763  }
3764  if (LocTriggerData.tg_trigger == NULL)
3765  elog(ERROR, "could not find trigger %u", tgoid);
3766 
3767  /*
3768  * If doing EXPLAIN ANALYZE, start charging time to this trigger. We want
3769  * to include time spent re-fetching tuples in the trigger cost.
3770  */
3771  if (instr)
3772  InstrStartNode(instr + tgindx);
3773 
3774  /*
3775  * Fetch the required tuple(s).
3776  */
3777  switch (event->ate_flags & AFTER_TRIGGER_TUP_BITS)
3778  {
3780  {
3781  Tuplestorestate *fdw_tuplestore =
3784 
3785  if (!tuplestore_gettupleslot(fdw_tuplestore, true, false,
3786  trig_tuple_slot1))
3787  elog(ERROR, "failed to fetch tuple1 for AFTER trigger");
3788 
3789  if ((evtshared->ats_event & TRIGGER_EVENT_OPMASK) ==
3791  !tuplestore_gettupleslot(fdw_tuplestore, true, false,
3792  trig_tuple_slot2))
3793  elog(ERROR, "failed to fetch tuple2 for AFTER trigger");
3794  }
3795  /* fall through */
3797 
3798  /*
3799  * Using ExecMaterializeSlot() rather than ExecFetchSlotTuple()
3800  * ensures that tg_trigtuple does not reference tuplestore memory.
3801  * (It is formally possible for the trigger function to queue
3802  * trigger events that add to the same tuplestore, which can push
3803  * other tuples out of memory.) The distinction is academic,
3804  * because we start with a minimal tuple that ExecFetchSlotTuple()
3805  * must materialize anyway.
3806  */
3807  LocTriggerData.tg_trigtuple =
3808  ExecMaterializeSlot(trig_tuple_slot1);
3809  LocTriggerData.tg_trigtuplebuf = InvalidBuffer;
3810 
3811  LocTriggerData.tg_newtuple =
3812  ((evtshared->ats_event & TRIGGER_EVENT_OPMASK) ==
3814  ExecMaterializeSlot(trig_tuple_slot2) : NULL;
3815  LocTriggerData.tg_newtuplebuf = InvalidBuffer;
3816 
3817  break;
3818 
3819  default:
3820  if (ItemPointerIsValid(&(event->ate_ctid1)))
3821  {
3822  ItemPointerCopy(&(event->ate_ctid1), &(tuple1.t_self));
3823  if (!heap_fetch(rel, SnapshotAny, &tuple1, &buffer1, false, NULL))
3824  elog(ERROR, "failed to fetch tuple1 for AFTER trigger");
3825  LocTriggerData.tg_trigtuple = &tuple1;
3826  LocTriggerData.tg_trigtuplebuf = buffer1;
3827  }
3828  else
3829  {
3830  LocTriggerData.tg_trigtuple = NULL;
3831  LocTriggerData.tg_trigtuplebuf = InvalidBuffer;
3832  }
3833 
3834  /* don't touch ctid2 if not there */
3835  if ((event->ate_flags & AFTER_TRIGGER_TUP_BITS) ==
3837  ItemPointerIsValid(&(event->ate_ctid2)))
3838  {
3839  ItemPointerCopy(&(event->ate_ctid2), &(tuple2.t_self));
3840  if (!heap_fetch(rel, SnapshotAny, &tuple2, &buffer2, false, NULL))
3841  elog(ERROR, "failed to fetch tuple2 for AFTER trigger");
3842  LocTriggerData.tg_newtuple = &tuple2;
3843  LocTriggerData.tg_newtuplebuf = buffer2;
3844  }
3845  else
3846  {
3847  LocTriggerData.tg_newtuple = NULL;
3848  LocTriggerData.tg_newtuplebuf = InvalidBuffer;
3849  }
3850  }
3851 
3852  /*
3853  * Set up the tuplestore information.
3854  */
3855  if (LocTriggerData.tg_trigger->tgoldtable)
3856  LocTriggerData.tg_oldtable =
3858  else
3859  LocTriggerData.tg_oldtable = NULL;
3860  if (LocTriggerData.tg_trigger->tgnewtable)
3861  LocTriggerData.tg_newtable =
3863  else
3864  LocTriggerData.tg_newtable = NULL;
3865 
3866  /*
3867  * Setup the remaining trigger information
3868  */
3869  LocTriggerData.type = T_TriggerData;
3870  LocTriggerData.tg_event =
3872  LocTriggerData.tg_relation = rel;
3873 
3874  MemoryContextReset(per_tuple_context);
3875 
3876  /*
3877  * Call the trigger and throw away any possibly returned updated tuple.
3878  * (Don't let ExecCallTriggerFunc measure EXPLAIN time.)
3879  */
3880  rettuple = ExecCallTriggerFunc(&LocTriggerData,
3881  tgindx,
3882  finfo,
3883  NULL,
3884  per_tuple_context);
3885  if (rettuple != NULL &&
3886  rettuple != LocTriggerData.tg_trigtuple &&
3887  rettuple != LocTriggerData.tg_newtuple)
3888  heap_freetuple(rettuple);
3889 
3890  /*
3891  * Release buffers
3892  */
3893  if (buffer1 != InvalidBuffer)
3894  ReleaseBuffer(buffer1);
3895  if (buffer2 != InvalidBuffer)
3896  ReleaseBuffer(buffer2);
3897 
3898  /*
3899  * If doing EXPLAIN ANALYZE, stop charging time to this trigger, and count
3900  * one "tuple returned" (really the number of firings).
3901  */
3902  if (instr)
3903  InstrStopNode(instr + tgindx, 1);
3904 }
#define ItemPointerIsValid(pointer)
Definition: itemptr.h:59
#define TRIGGER_EVENT_ROW
Definition: trigger.h:58
TriggerEvent ats_event
Definition: trigger.c:3273
void InstrStopNode(Instrumentation *instr, double nTuples)
Definition: instrument.c:80
Tuplestorestate ** old_tuplestores
Definition: trigger.c:3417
#define AFTER_TRIGGER_FDW_REUSE
Definition: trigger.c:3263
ItemPointerData ate_ctid2
Definition: trigger.c:3285
TriggerFlags ate_flags
Definition: trigger.c:3283
Buffer tg_newtuplebuf
Definition: trigger.h:39
bool heap_fetch(Relation relation, Snapshot snapshot, HeapTuple tuple, Buffer *userbuf, bool keep_buf, Relation stats_relation)
Definition: heapam.c:1862
Oid tgoid
Definition: reltrigger.h:25
#define AFTER_TRIGGER_TUP_BITS
Definition: trigger.c:3267
#define InvalidBuffer
Definition: buf.h:25
void MemoryContextReset(MemoryContext context)
Definition: mcxt.c:135
void ReleaseBuffer(Buffer buffer)
Definition: bufmgr.c:3309
void heap_freetuple(HeapTuple htup)
Definition: heaptuple.c:1372
unsigned int Oid
Definition: postgres_ext.h:31
#define TRIGGER_EVENT_OPMASK
Definition: trigger.h:56
HeapTuple tg_trigtuple
Definition: trigger.h:35
#define GetTriggerSharedData(evt)
Definition: trigger.c:3308
#define ERROR
Definition: elog.h:43
void InstrStartNode(Instrumentation *instr)
Definition: instrument.c:63
ItemPointerData t_self
Definition: htup.h:65
Trigger * triggers
Definition: reltrigger.h:48
Buffer tg_trigtuplebuf
Definition: trigger.h:38
#define AFTER_TRIGGER_2CTID
Definition: trigger.c:3266
int numtriggers
Definition: reltrigger.h:49
#define SnapshotAny
Definition: tqual.h:28
char * tgnewtable
Definition: reltrigger.h:43
Trigger * tg_trigger
Definition: trigger.h:37
HeapTuple tg_newtuple
Definition: trigger.h:36
bool tuplestore_gettupleslot(Tuplestorestate *state, bool forward, bool copy, TupleTableSlot *slot)
Definition: tuplestore.c:1078
#define NULL
Definition: c.h:229
TriggerEvent tg_event
Definition: trigger.h:33
static Tuplestorestate * GetTriggerTransitionTuplestore(Tuplestorestate **tss)
Definition: trigger.c:3452
#define AFTER_TRIGGER_FDW_FETCH
Definition: trigger.c:3264
HeapTuple ExecMaterializeSlot(TupleTableSlot *slot)
Definition: execTuples.c:725
#define TRIGGER_EVENT_UPDATE
Definition: trigger.h:54
Tuplestorestate * tg_oldtable
Definition: trigger.h:40
NodeTag type
Definition: trigger.h:32
Tuplestorestate * tg_newtable
Definition: trigger.h:41
Tuplestorestate ** fdw_tuplestores
Definition: trigger.c:3415
#define elog
Definition: elog.h:219
static HeapTuple ExecCallTriggerFunc(TriggerData *trigdata, int tgindx, FmgrInfo *finfo, Instrumentation *instr, MemoryContext per_tuple_context)
Definition: trigger.c:2043
ItemPointerData ate_ctid1
Definition: trigger.c:3284
char * tgoldtable
Definition: reltrigger.h:42
int Buffer
Definition: buf.h:23
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
Tuplestorestate ** new_tuplestores
Definition: trigger.c:3418
#define ItemPointerCopy(fromPointer, toPointer)
Definition: itemptr.h:138
Relation tg_relation
Definition: trigger.h:34
void AfterTriggerFireDeferred ( void  )

Definition at line 4282 of file trigger.c.

References afterTriggerInvokeEvents(), afterTriggerMarkEvents(), Assert, AfterTriggersData::events, AfterTriggersData::firing_counter, GetTransactionSnapshot(), AfterTriggerEventList::head, NULL, PopActiveSnapshot(), PushActiveSnapshot(), and AfterTriggersData::query_depth.

Referenced by CommitTransaction(), and PrepareTransaction().

4283 {
4284  AfterTriggerEventList *events;
4285  bool snap_pushed = false;
4286 
4287  /* Must not be inside a query */
4289 
4290  /*
4291  * If there are any triggers to fire, make sure we have set a snapshot for
4292  * them to use. (Since PortalRunUtility doesn't set a snap for COMMIT, we
4293  * can't assume ActiveSnapshot is valid on entry.)
4294  */
4295  events = &afterTriggers.events;
4296  if (events->head != NULL)
4297  {
4299  snap_pushed = true;
4300  }
4301 
4302  /*
4303  * Run all the remaining triggers. Loop until they are all gone, in case
4304  * some trigger queues more for us to do.
4305  */
4306  while (afterTriggerMarkEvents(events, NULL, false))
4307  {
4308  CommandId firing_id = afterTriggers.firing_counter++;
4309 
4310  if (afterTriggerInvokeEvents(events, firing_id, NULL, true))
4311  break; /* all fired */
4312  }
4313 
4314  /*
4315  * We don't bother freeing the event list, since it will go away anyway
4316  * (and more efficiently than via pfree) in AfterTriggerEndXact.
4317  */
4318 
4319  if (snap_pushed)
4321 }
uint32 CommandId
Definition: c.h:411
static bool afterTriggerInvokeEvents(AfterTriggerEventList *events, CommandId firing_id, EState *estate, bool delete_ok)
Definition: trigger.c:3994
void PopActiveSnapshot(void)
Definition: snapmgr.c:807
Snapshot GetTransactionSnapshot(void)
Definition: snapmgr.c:300
void PushActiveSnapshot(Snapshot snap)
Definition: snapmgr.c:728
CommandId firing_counter
Definition: trigger.c:3410
#define NULL
Definition: c.h:229
#define Assert(condition)
Definition: c.h:675
AfterTriggerEventChunk * head
Definition: trigger.c:3332
static bool afterTriggerMarkEvents(AfterTriggerEventList *events, AfterTriggerEventList *move_list, bool immediate_only)
Definition: trigger.c:3922
AfterTriggerEventList events
Definition: trigger.c:3412
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
static void afterTriggerFreeEventList ( AfterTriggerEventList events)
static

Definition at line 3657 of file trigger.c.

References AfterTriggerEventList::head, AfterTriggerEventChunk::next, NULL, pfree(), AfterTriggerEventList::tail, and AfterTriggerEventList::tailfree.

Referenced by AfterTriggerEndQuery(), AfterTriggerEndSubXact(), and afterTriggerRestoreEventList().

3658 {
3659  AfterTriggerEventChunk *chunk;
3660  AfterTriggerEventChunk *next_chunk;
3661 
3662  for (chunk = events->head; chunk != NULL; chunk = next_chunk)
3663  {
3664  next_chunk = chunk->next;
3665  pfree(chunk);
3666  }
3667  events->head = NULL;
3668  events->tail = NULL;
3669  events->tailfree = NULL;
3670 }
AfterTriggerEventChunk * tail
Definition: trigger.c:3333
struct AfterTriggerEventChunk * next
Definition: trigger.c:3320
void pfree(void *pointer)
Definition: mcxt.c:950
#define NULL
Definition: c.h:229
AfterTriggerEventChunk * head
Definition: trigger.c:3332
static bool afterTriggerInvokeEvents ( AfterTriggerEventList events,
CommandId  firing_id,
EState estate,
bool  delete_ok 
)
static

Definition at line 3994 of file trigger.c.

References AFTER_TRIGGER_DONE, AFTER_TRIGGER_IN_PROGRESS, AfterTriggerExecute(), ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate(), AfterTriggerEventData::ate_flags, AfterTriggerSharedData::ats_firing_id, AfterTriggerSharedData::ats_relid, CHUNK_DATA_START, CreateExecutorState(), CurrentMemoryContext, elog, AfterTriggerEventChunk::endfree, AfterTriggerEventChunk::endptr, ERROR, ExecCleanUpTriggerState(), ExecDropSingleTupleTableSlot(), ExecGetTriggerResultRel(), for_each_chunk, for_each_event, FreeExecutorState(), AfterTriggerEventChunk::freeptr, GetTriggerSharedData, MakeSingleTupleTableSlot(), MemoryContextDelete(), NULL, RelationData::rd_att, RelationData::rd_rel, RelationGetRelid, RELKIND_FOREIGN_TABLE, ResultRelInfo::ri_RelationDesc, ResultRelInfo::ri_TrigDesc, ResultRelInfo::ri_TrigFunctions, ResultRelInfo::ri_TrigInstrument, AfterTriggerEventList::tail, and AfterTriggerEventList::tailfree.

Referenced by AfterTriggerEndQuery(), AfterTriggerFireDeferred(), and AfterTriggerSetState().

3998 {
3999  bool all_fired = true;
4000  AfterTriggerEventChunk *chunk;
4001  MemoryContext per_tuple_context;
4002  bool local_estate = false;
4003  Relation rel = NULL;
4004  TriggerDesc *trigdesc = NULL;
4005  FmgrInfo *finfo = NULL;
4006  Instrumentation *instr = NULL;
4007  TupleTableSlot *slot1 = NULL,
4008  *slot2 = NULL;
4009 
4010  /* Make a local EState if need be */
4011  if (estate == NULL)
4012  {
4013  estate = CreateExecutorState();
4014  local_estate = true;
4015  }
4016 
4017  /* Make a per-tuple memory context for trigger function calls */
4018  per_tuple_context =
4020  "AfterTriggerTupleContext",
4022 
4023  for_each_chunk(chunk, *events)
4024  {
4025  AfterTriggerEvent event;
4026  bool all_fired_in_chunk = true;
4027 
4028  for_each_event(event, chunk)
4029  {
4030  AfterTriggerShared evtshared = GetTriggerSharedData(event);
4031 
4032  /*
4033  * Is it one for me to fire?
4034  */
4035  if ((event->ate_flags & AFTER_TRIGGER_IN_PROGRESS) &&
4036  evtshared->ats_firing_id == firing_id)
4037  {
4038  /*
4039  * So let's fire it... but first, find the correct relation if
4040  * this is not the same relation as before.
4041  */
4042  if (rel == NULL || RelationGetRelid(rel) != evtshared->ats_relid)
4043  {
4044  ResultRelInfo *rInfo;
4045 
4046  rInfo = ExecGetTriggerResultRel(estate, evtshared->ats_relid);
4047  rel = rInfo->ri_RelationDesc;
4048  trigdesc = rInfo->ri_TrigDesc;
4049  finfo = rInfo->ri_TrigFunctions;
4050  instr = rInfo->ri_TrigInstrument;
4051  if (rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
4052  {
4053  if (slot1 != NULL)
4054  {
4057  }
4058  slot1 = MakeSingleTupleTableSlot(rel->rd_att);
4059  slot2 = MakeSingleTupleTableSlot(rel->rd_att);
4060  }
4061  if (trigdesc == NULL) /* should not happen */
4062  elog(ERROR, "relation %u has no triggers",
4063  evtshared->ats_relid);
4064  }
4065 
4066  /*
4067  * Fire it. Note that the AFTER_TRIGGER_IN_PROGRESS flag is
4068  * still set, so recursive examinations of the event list
4069  * won't try to re-fire it.
4070  */
4071  AfterTriggerExecute(event, rel, trigdesc, finfo, instr,
4072  per_tuple_context, slot1, slot2);
4073 
4074  /*
4075  * Mark the event as done.
4076  */
4077  event->ate_flags &= ~AFTER_TRIGGER_IN_PROGRESS;
4078  event->ate_flags |= AFTER_TRIGGER_DONE;
4079  }
4080  else if (!(event->ate_flags & AFTER_TRIGGER_DONE))
4081  {
4082  /* something remains to be done */
4083  all_fired = all_fired_in_chunk = false;
4084  }
4085  }
4086 
4087  /* Clear the chunk if delete_ok and nothing left of interest */
4088  if (delete_ok && all_fired_in_chunk)
4089  {
4090  chunk->freeptr = CHUNK_DATA_START(chunk);
4091  chunk->endfree = chunk->endptr;
4092 
4093  /*
4094  * If it's last chunk, must sync event list's tailfree too. Note
4095  * that delete_ok must NOT be passed as true if there could be
4096  * stacked AfterTriggerEventList values pointing at this event
4097  * list, since we'd fail to fix their copies of tailfree.
4098  */
4099  if (chunk == events->tail)
4100  events->tailfree = chunk->freeptr;
4101  }
4102  }
4103  if (slot1 != NULL)
4104  {
4107  }
4108 
4109  /* Release working resources */
4110  MemoryContextDelete(per_tuple_context);
4111 
4112  if (local_estate)
4113  {
4114  ExecCleanUpTriggerState(estate);
4115  FreeExecutorState(estate);
4116  }
4117 
4118  return all_fired;
4119 }
Definition: fmgr.h:56
Relation ri_RelationDesc
Definition: execnodes.h:374
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:200
TriggerFlags ate_flags
Definition: trigger.c:3283
#define AFTER_TRIGGER_DONE
Definition: trigger.c:3260
#define CHUNK_DATA_START(cptr)
Definition: trigger.c:3327
Instrumentation * ri_TrigInstrument
Definition: execnodes.h:381
AfterTriggerEventChunk * tail
Definition: trigger.c:3333
Form_pg_class rd_rel
Definition: rel.h:114
#define GetTriggerSharedData(evt)
Definition: trigger.c:3308
#define for_each_event(eptr, cptr)
Definition: trigger.c:3340
void FreeExecutorState(EState *estate)
Definition: execUtils.c:178
#define ERROR
Definition: elog.h:43
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:165
void ExecDropSingleTupleTableSlot(TupleTableSlot *slot)
Definition: execTuples.c:216
#define RELKIND_FOREIGN_TABLE
Definition: pg_class.h:167
MemoryContext CurrentMemoryContext
Definition: mcxt.c:37
TupleTableSlot * MakeSingleTupleTableSlot(TupleDesc tupdesc)
Definition: execTuples.c:199
TriggerDesc * ri_TrigDesc
Definition: execnodes.h:378
EState * CreateExecutorState(void)
Definition: execUtils.c:80
ResultRelInfo * ExecGetTriggerResultRel(EState *estate, Oid relid)
Definition: execMain.c:1392
MemoryContext AllocSetContextCreate(MemoryContext parent, const char *name, Size minContextSize, Size initBlockSize, Size maxBlockSize)
Definition: aset.c:322
TupleDesc rd_att
Definition: rel.h:115
#define for_each_chunk(cptr, evtlist)
Definition: trigger.c:3338
#define NULL
Definition: c.h:229
CommandId ats_firing_id
Definition: trigger.c:3276
void ExecCleanUpTriggerState(EState *estate)
Definition: execMain.c:1453
#define AFTER_TRIGGER_IN_PROGRESS
Definition: trigger.c:3261
#define elog
Definition: elog.h:219
#define RelationGetRelid(relation)
Definition: rel.h:417
static void AfterTriggerExecute(AfterTriggerEvent event, Relation rel, TriggerDesc *trigdesc, FmgrInfo *finfo, Instrumentation *instr, MemoryContext per_tuple_context, TupleTableSlot *trig_tuple_slot1, TupleTableSlot *trig_tuple_slot2)
Definition: trigger.c:3735
FmgrInfo * ri_TrigFunctions
Definition: execnodes.h:379
static bool afterTriggerMarkEvents ( AfterTriggerEventList events,
AfterTriggerEventList move_list,
bool  immediate_only 
)
static

Definition at line 3922 of file trigger.c.

References AFTER_TRIGGER_DONE, AFTER_TRIGGER_IN_PROGRESS, afterTriggerAddEvent(), afterTriggerCheckState(), AfterTriggerEventData::ate_flags, AfterTriggerSharedData::ats_firing_id, AfterTriggersData::firing_counter, for_each_event_chunk, GetTriggerSharedData, and NULL.

Referenced by AfterTriggerEndQuery(), AfterTriggerFireDeferred(), and AfterTriggerSetState().

3925 {
3926  bool found = false;
3927  AfterTriggerEvent event;
3928  AfterTriggerEventChunk *chunk;
3929 
3930  for_each_event_chunk(event, chunk, *events)
3931  {
3932  AfterTriggerShared evtshared = GetTriggerSharedData(event);
3933  bool defer_it = false;
3934 
3935  if (!(event->ate_flags &
3937  {
3938  /*
3939  * This trigger hasn't been called or scheduled yet. Check if we
3940  * should call it now.
3941  */
3942  if (immediate_only && afterTriggerCheckState(evtshared))
3943  {
3944  defer_it = true;
3945  }
3946  else
3947  {
3948  /*
3949  * Mark it as to be fired in this firing cycle.
3950  */
3952  event->ate_flags |= AFTER_TRIGGER_IN_PROGRESS;
3953  found = true;
3954  }
3955  }
3956 
3957  /*
3958  * If it's deferred, move it to move_list, if requested.
3959  */
3960  if (defer_it && move_list != NULL)
3961  {
3962  /* add it to move_list */
3963  afterTriggerAddEvent(move_list, event, evtshared);
3964  /* mark original copy "done" so we don't do it again */
3965  event->ate_flags |= AFTER_TRIGGER_DONE;
3966  }
3967  }
3968 
3969  return found;
3970 }
TriggerFlags ate_flags
Definition: trigger.c:3283
#define AFTER_TRIGGER_DONE
Definition: trigger.c:3260
#define for_each_event_chunk(eptr, cptr, evtlist)
Definition: trigger.c:3345
static bool afterTriggerCheckState(AfterTriggerShared evtshared)
Definition: trigger.c:3496
#define GetTriggerSharedData(evt)
Definition: trigger.c:3308
CommandId firing_counter
Definition: trigger.c:3410
#define NULL
Definition: c.h:229
static void afterTriggerAddEvent(AfterTriggerEventList *events, AfterTriggerEvent event, AfterTriggerShared evtshared)
Definition: trigger.c:3542
CommandId ats_firing_id
Definition: trigger.c:3276
#define AFTER_TRIGGER_IN_PROGRESS
Definition: trigger.c:3261
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
bool AfterTriggerPendingOnRel ( Oid  relid)

Definition at line 5026 of file trigger.c.

References AFTER_TRIGGER_DONE, AfterTriggerEventData::ate_flags, AfterTriggerSharedData::ats_relid, AfterTriggersData::events, for_each_event_chunk, GetTriggerSharedData, AfterTriggersData::maxquerydepth, AfterTriggersData::query_depth, and AfterTriggersData::query_stack.

Referenced by CheckTableNotInUse().

5027 {
5028  AfterTriggerEvent event;
5029  AfterTriggerEventChunk *chunk;
5030  int depth;
5031 
5032  /* Scan queued events */
5034  {
5035  AfterTriggerShared evtshared = GetTriggerSharedData(event);
5036 
5037  /*
5038  * We can ignore completed events. (Even if a DONE flag is rolled
5039  * back by subxact abort, it's OK because the effects of the TRUNCATE
5040  * or whatever must get rolled back too.)
5041  */
5042  if (event->ate_flags & AFTER_TRIGGER_DONE)
5043  continue;
5044 
5045  if (evtshared->ats_relid == relid)
5046  return true;
5047  }
5048 
5049  /*
5050  * Also scan events queued by incomplete queries. This could only matter
5051  * if TRUNCATE/etc is executed by a function or trigger within an updating
5052  * query on the same relation, which is pretty perverse, but let's check.
5053  */
5054  for (depth = 0; depth <= afterTriggers.query_depth && depth < afterTriggers.maxquerydepth; depth++)
5055  {
5056  for_each_event_chunk(event, chunk, afterTriggers.query_stack[depth])
5057  {
5058  AfterTriggerShared evtshared = GetTriggerSharedData(event);
5059 
5060  if (event->ate_flags & AFTER_TRIGGER_DONE)
5061  continue;
5062 
5063  if (evtshared->ats_relid == relid)
5064  return true;
5065  }
5066  }
5067 
5068  return false;
5069 }
TriggerFlags ate_flags
Definition: trigger.c:3283
#define AFTER_TRIGGER_DONE
Definition: trigger.c:3260
#define for_each_event_chunk(eptr, cptr, evtlist)
Definition: trigger.c:3345
#define GetTriggerSharedData(evt)
Definition: trigger.c:3308
AfterTriggerEventList events
Definition: trigger.c:3412
AfterTriggerEventList * query_stack
Definition: trigger.c:3414
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
static void afterTriggerRestoreEventList ( AfterTriggerEventList events,
const AfterTriggerEventList old_events 
)
static

Definition at line 3680 of file trigger.c.

References afterTriggerFreeEventList(), AfterTriggerEventChunk::freeptr, AfterTriggerEventChunk::next, NULL, pfree(), AfterTriggerEventList::tail, and AfterTriggerEventList::tailfree.

Referenced by AfterTriggerEndSubXact().

3682 {
3683  AfterTriggerEventChunk *chunk;
3684  AfterTriggerEventChunk *next_chunk;
3685 
3686  if (old_events->tail == NULL)
3687  {
3688  /* restoring to a completely empty state, so free everything */
3689  afterTriggerFreeEventList(events);
3690  }
3691  else
3692  {
3693  *events = *old_events;
3694  /* free any chunks after the last one we want to keep */
3695  for (chunk = events->tail->next; chunk != NULL; chunk = next_chunk)
3696  {
3697  next_chunk = chunk->next;
3698  pfree(chunk);
3699  }
3700  /* and clean up the tail chunk to be the right length */
3701  events->tail->next = NULL;
3702  events->tail->freeptr = events->tailfree;
3703 
3704  /*
3705  * We don't make any effort to remove now-unused shared data records.
3706  * They might still be useful, anyway.
3707  */
3708  }
3709 }
AfterTriggerEventChunk * tail
Definition: trigger.c:3333
struct AfterTriggerEventChunk * next
Definition: trigger.c:3320
void pfree(void *pointer)
Definition: mcxt.c:950
static void afterTriggerFreeEventList(AfterTriggerEventList *events)
Definition: trigger.c:3657
#define NULL
Definition: c.h:229
static void AfterTriggerSaveEvent ( EState estate,
ResultRelInfo relinfo,
int  event,
bool  row_trigger,
HeapTuple  oldtup,
HeapTuple  newtup,
List recheckIndexes,
Bitmapset modifiedCols 
)
static

Definition at line 5091 of file trigger.c.

References AFTER_TRIGGER_1CTID, AFTER_TRIGGER_2CTID, AFTER_TRIGGER_DEFERRABLE, AFTER_TRIGGER_FDW_FETCH, AFTER_TRIGGER_FDW_REUSE, AFTER_TRIGGER_INITDEFERRED, afterTriggerAddEvent(), AfterTriggerEnlargeQueryState(), Assert, AfterTriggerEventData::ate_ctid1, AfterTriggerEventData::ate_ctid2, AfterTriggerEventData::ate_flags, AfterTriggerSharedData::ats_event, AfterTriggerSharedData::ats_firing_id, AfterTriggerSharedData::ats_relid, AfterTriggerSharedData::ats_tgoid, elog, ERROR, AfterTriggersData::fdw_tuplestores, GetTriggerTransitionTuplestore(), i, ItemPointerCopy, ItemPointerSetInvalid, list_member_oid(), AfterTriggersData::maxquerydepth, AfterTriggersData::new_tuplestores, NULL, TriggerDesc::numtriggers, AfterTriggersData::old_tuplestores, AfterTriggersData::query_depth, AfterTriggersData::query_stack, RelationData::rd_rel, RelationGetRelid, RELKIND_FOREIGN_TABLE, RI_FKey_fk_upd_check_required(), RI_FKey_pk_upd_check_required(), RI_FKey_trigger_type(), ResultRelInfo::ri_RelationDesc, ResultRelInfo::ri_TrigDesc, RI_TRIGGER_FK, RI_TRIGGER_NONE, RI_TRIGGER_PK, HeapTupleData::t_self, Trigger::tgconstrindid, Trigger::tgdeferrable, Trigger::tgfoid, Trigger::tginitdeferred, Trigger::tgoid, Trigger::tgtype, TriggerDesc::trig_delete_after_row, TriggerDesc::trig_delete_old_table, TriggerDesc::trig_insert_after_row, TriggerDesc::trig_insert_new_table, TriggerDesc::trig_update_after_row, TriggerDesc::trig_update_new_table, TriggerDesc::trig_update_old_table, TRIGGER_EVENT_DELETE, TRIGGER_EVENT_INSERT, TRIGGER_EVENT_OPMASK, TRIGGER_EVENT_ROW, TRIGGER_EVENT_TRUNCATE, TRIGGER_EVENT_UPDATE, TRIGGER_FIRED_BY_UPDATE, TRIGGER_TYPE_AFTER, TRIGGER_TYPE_DELETE, TRIGGER_TYPE_INSERT, TRIGGER_TYPE_MATCHES, TRIGGER_TYPE_ROW, TRIGGER_TYPE_STATEMENT, TRIGGER_TYPE_TRUNCATE, TRIGGER_TYPE_UPDATE, TriggerEnabled(), TriggerDesc::triggers, and tuplestore_puttuple().

Referenced by ExecARDeleteTriggers(), ExecARInsertTriggers(), ExecARUpdateTriggers(), ExecASDeleteTriggers(), ExecASInsertTriggers(), ExecASTruncateTriggers(), and ExecASUpdateTriggers().

5095 {
5096  Relation rel = relinfo->ri_RelationDesc;
5097  TriggerDesc *trigdesc = relinfo->ri_TrigDesc;
5098  AfterTriggerEventData new_event;
5099  AfterTriggerSharedData new_shared;
5100  char relkind = relinfo->ri_RelationDesc->rd_rel->relkind;
5101  int tgtype_event;
5102  int tgtype_level;
5103  int i;
5104  Tuplestorestate *fdw_tuplestore = NULL;
5105 
5106  /*
5107  * Check state. We use a normal test not Assert because it is possible to
5108  * reach here in the wrong state given misconfigured RI triggers, in
5109  * particular deferring a cascade action trigger.
5110  */
5111  if (afterTriggers.query_depth < 0)
5112  elog(ERROR, "AfterTriggerSaveEvent() called outside of query");
5113 
5114  /* Be sure we have enough space to record events at this query depth. */
5117 
5118  /*
5119  * If the relation has AFTER ... FOR EACH ROW triggers, capture rows into
5120  * transition tuplestores for this depth.
5121  */
5122  if (row_trigger)
5123  {
5124  if ((event == TRIGGER_EVENT_DELETE &&
5125  trigdesc->trig_delete_old_table) ||
5126  (event == TRIGGER_EVENT_UPDATE &&
5127  trigdesc->trig_update_old_table))
5128  {
5129  Tuplestorestate *old_tuplestore;
5130 
5131  Assert(oldtup != NULL);
5132  old_tuplestore =
5135  tuplestore_puttuple(old_tuplestore, oldtup);
5136  }
5137  if ((event == TRIGGER_EVENT_INSERT &&
5138  trigdesc->trig_insert_new_table) ||
5139  (event == TRIGGER_EVENT_UPDATE &&
5140  trigdesc->trig_update_new_table))
5141  {
5142  Tuplestorestate *new_tuplestore;
5143 
5144  Assert(newtup != NULL);
5145  new_tuplestore =
5148  tuplestore_puttuple(new_tuplestore, newtup);
5149  }
5150 
5151  /* If transition tables are the only reason we're here, return. */
5152  if ((event == TRIGGER_EVENT_DELETE && !trigdesc->trig_delete_after_row) ||
5153  (event == TRIGGER_EVENT_INSERT && !trigdesc->trig_insert_after_row) ||
5154  (event == TRIGGER_EVENT_UPDATE && !trigdesc->trig_update_after_row))
5155  return;
5156  }
5157 
5158  /*
5159  * Validate the event code and collect the associated tuple CTIDs.
5160  *
5161  * The event code will be used both as a bitmask and an array offset, so
5162  * validation is important to make sure we don't walk off the edge of our
5163  * arrays.
5164  */
5165  switch (event)
5166  {
5167  case TRIGGER_EVENT_INSERT:
5168  tgtype_event = TRIGGER_TYPE_INSERT;
5169  if (row_trigger)
5170  {
5171  Assert(oldtup == NULL);
5172  Assert(newtup != NULL);
5173  ItemPointerCopy(&(newtup->t_self), &(new_event.ate_ctid1));
5174  ItemPointerSetInvalid(&(new_event.ate_ctid2));
5175  }
5176  else
5177  {
5178  Assert(oldtup == NULL);
5179  Assert(newtup == NULL);
5180  ItemPointerSetInvalid(&(new_event.ate_ctid1));
5181  ItemPointerSetInvalid(&(new_event.ate_ctid2));
5182  }
5183  break;
5184  case TRIGGER_EVENT_DELETE:
5185  tgtype_event = TRIGGER_TYPE_DELETE;
5186  if (row_trigger)
5187  {
5188  Assert(oldtup != NULL);
5189  Assert(newtup == NULL);
5190  ItemPointerCopy(&(oldtup->t_self), &(new_event.ate_ctid1));
5191  ItemPointerSetInvalid(&(new_event.ate_ctid2));
5192  }
5193  else
5194  {
5195  Assert(oldtup == NULL);
5196  Assert(newtup == NULL);
5197  ItemPointerSetInvalid(&(new_event.ate_ctid1));
5198  ItemPointerSetInvalid(&(new_event.ate_ctid2));
5199  }
5200  break;
5201  case TRIGGER_EVENT_UPDATE:
5202  tgtype_event = TRIGGER_TYPE_UPDATE;
5203  if (row_trigger)
5204  {
5205  Assert(oldtup != NULL);
5206  Assert(newtup != NULL);
5207  ItemPointerCopy(&(oldtup->t_self), &(new_event.ate_ctid1));
5208  ItemPointerCopy(&(newtup->t_self), &(new_event.ate_ctid2));
5209  }
5210  else
5211  {
5212  Assert(oldtup == NULL);
5213  Assert(newtup == NULL);
5214  ItemPointerSetInvalid(&(new_event.ate_ctid1));
5215  ItemPointerSetInvalid(&(new_event.ate_ctid2));
5216  }
5217  break;
5219  tgtype_event = TRIGGER_TYPE_TRUNCATE;
5220  Assert(oldtup == NULL);
5221  Assert(newtup == NULL);
5222  ItemPointerSetInvalid(&(new_event.ate_ctid1));
5223  ItemPointerSetInvalid(&(new_event.ate_ctid2));
5224  break;
5225  default:
5226  elog(ERROR, "invalid after-trigger event code: %d", event);
5227  tgtype_event = 0; /* keep compiler quiet */
5228  break;
5229  }
5230 
5231  if (!(relkind == RELKIND_FOREIGN_TABLE && row_trigger))
5232  new_event.ate_flags = (row_trigger && event == TRIGGER_EVENT_UPDATE) ?
5234  /* else, we'll initialize ate_flags for each trigger */
5235 
5236  tgtype_level = (row_trigger ? TRIGGER_TYPE_ROW : TRIGGER_TYPE_STATEMENT);
5237 
5238  for (i = 0; i < trigdesc->numtriggers; i++)
5239  {
5240  Trigger *trigger = &trigdesc->triggers[i];
5241 
5242  if (!TRIGGER_TYPE_MATCHES(trigger->tgtype,
5243  tgtype_level,
5245  tgtype_event))
5246  continue;
5247  if (!TriggerEnabled(estate, relinfo, trigger, event,
5248  modifiedCols, oldtup, newtup))
5249  continue;
5250 
5251  if (relkind == RELKIND_FOREIGN_TABLE && row_trigger)
5252  {
5253  if (fdw_tuplestore == NULL)
5254  {
5255  fdw_tuplestore =
5258  new_event.ate_flags = AFTER_TRIGGER_FDW_FETCH;
5259  }
5260  else
5261  /* subsequent event for the same tuple */
5262  new_event.ate_flags = AFTER_TRIGGER_FDW_REUSE;
5263  }
5264 
5265  /*
5266  * If the trigger is a foreign key enforcement trigger, there are
5267  * certain cases where we can skip queueing the event because we can
5268  * tell by inspection that the FK constraint will still pass.
5269  */
5270  if (TRIGGER_FIRED_BY_UPDATE(event))
5271  {
5272  switch (RI_FKey_trigger_type(trigger->tgfoid))
5273  {
5274  case RI_TRIGGER_PK:
5275  /* Update on trigger's PK table */
5276  if (!RI_FKey_pk_upd_check_required(trigger, rel,
5277  oldtup, newtup))
5278  {
5279  /* skip queuing this event */
5280  continue;
5281  }
5282  break;
5283 
5284  case RI_TRIGGER_FK:
5285  /* Update on trigger's FK table */
5286  if (!RI_FKey_fk_upd_check_required(trigger, rel,
5287  oldtup, newtup))
5288  {
5289  /* skip queuing this event */
5290  continue;
5291  }
5292  break;
5293 
5294  case RI_TRIGGER_NONE:
5295  /* Not an FK trigger */
5296  break;
5297  }
5298  }
5299 
5300  /*
5301  * If the trigger is a deferred unique constraint check trigger, only
5302  * queue it if the unique constraint was potentially violated, which
5303  * we know from index insertion time.
5304  */
5305  if (trigger->tgfoid == F_UNIQUE_KEY_RECHECK)
5306  {
5307  if (!list_member_oid(recheckIndexes, trigger->tgconstrindid))
5308  continue; /* Uniqueness definitely not violated */
5309  }
5310 
5311  /*
5312  * Fill in event structure and add it to the current query's queue.
5313  */
5314  new_shared.ats_event =
5315  (event & TRIGGER_EVENT_OPMASK) |
5316  (row_trigger ? TRIGGER_EVENT_ROW : 0) |
5317  (trigger->tgdeferrable ? AFTER_TRIGGER_DEFERRABLE : 0) |
5318  (trigger->tginitdeferred ? AFTER_TRIGGER_INITDEFERRED : 0);
5319  new_shared.ats_tgoid = trigger->tgoid;
5320  new_shared.ats_relid = RelationGetRelid(rel);
5321  new_shared.ats_firing_id = 0;
5322 
5324  &new_event, &new_shared);
5325  }
5326 
5327  /*
5328  * Finally, spool any foreign tuple(s). The tuplestore squashes them to
5329  * minimal tuples, so this loses any system columns. The executor lost
5330  * those columns before us, for an unrelated reason, so this is fine.
5331  */
5332  if (fdw_tuplestore)
5333  {
5334  if (oldtup != NULL)
5335  tuplestore_puttuple(fdw_tuplestore, oldtup);
5336  if (newtup != NULL)
5337  tuplestore_puttuple(fdw_tuplestore, newtup);
5338  }
5339 }
#define TRIGGER_EVENT_ROW
Definition: trigger.h:58
TriggerEvent ats_event
Definition: trigger.c:3273
Tuplestorestate ** old_tuplestores
Definition: trigger.c:3417
Relation ri_RelationDesc
Definition: execnodes.h:374
int RI_FKey_trigger_type(Oid tgfoid)
Definition: ri_triggers.c:3704
#define AFTER_TRIGGER_FDW_REUSE
Definition: trigger.c:3263
#define AFTER_TRIGGER_INITDEFERRED
Definition: trigger.h:68
ItemPointerData ate_ctid2
Definition: trigger.c:3285
#define TRIGGER_TYPE_DELETE
Definition: pg_trigger.h:101
#define TRIGGER_EVENT_DELETE
Definition: trigger.h:53
Oid tgfoid
Definition: reltrigger.h:28
TriggerFlags ate_flags
Definition: trigger.c:3283
#define AFTER_TRIGGER_DEFERRABLE
Definition: trigger.h:67
#define TRIGGER_TYPE_MATCHES(type, level, timing, event)
Definition: pg_trigger.h:146
Oid tgoid
Definition: reltrigger.h:25
bool trig_update_new_table
Definition: reltrigger.h:76
Form_pg_class rd_rel
Definition: rel.h:114
#define TRIGGER_EVENT_OPMASK
Definition: trigger.h:56
bool trig_insert_new_table
Definition: reltrigger.h:74
#define ERROR
Definition: elog.h:43
#define TRIGGER_TYPE_AFTER
Definition: pg_trigger.h:112
int16 tgtype
Definition: reltrigger.h:29
bool tgdeferrable
Definition: reltrigger.h:35
ItemPointerData t_self
Definition: htup.h:65
bool tginitdeferred
Definition: reltrigger.h:36
void tuplestore_puttuple(Tuplestorestate *state, HeapTuple tuple)
Definition: tuplestore.c:730
bool trig_delete_after_row
Definition: reltrigger.h:66
Trigger * triggers
Definition: reltrigger.h:48
#define RELKIND_FOREIGN_TABLE
Definition: pg_class.h:167
bool trig_insert_after_row
Definition: reltrigger.h:56
#define TRIGGER_TYPE_ROW
Definition: pg_trigger.h:98
bool trig_update_old_table
Definition: reltrigger.h:75
#define AFTER_TRIGGER_1CTID
Definition: trigger.c:3265
#define AFTER_TRIGGER_2CTID
Definition: trigger.c:3266
TriggerDesc * ri_TrigDesc
Definition: execnodes.h:378
bool trig_update_after_row
Definition: reltrigger.h:61
int numtriggers
Definition: reltrigger.h:49
bool RI_FKey_fk_upd_check_required(Trigger *trigger, Relation fk_rel, HeapTuple old_row, HeapTuple new_row)
Definition: ri_triggers.c:2144
#define TRIGGER_TYPE_TRUNCATE
Definition: pg_trigger.h:103
#define TRIGGER_TYPE_UPDATE
Definition: pg_trigger.h:102
static bool TriggerEnabled(EState *estate, ResultRelInfo *relinfo, Trigger *trigger, TriggerEvent event, Bitmapset *modifiedCols, HeapTuple oldtup, HeapTuple newtup)
Definition: trigger.c:3040
static void AfterTriggerEnlargeQueryState(void)
Definition: trigger.c:4586
#define RI_TRIGGER_FK
Definition: trigger.h:210
bool list_member_oid(const List *list, Oid datum)
Definition: list.c:505
#define NULL
Definition: c.h:229
#define Assert(condition)
Definition: c.h:675
static void afterTriggerAddEvent(AfterTriggerEventList *events, AfterTriggerEvent event, AfterTriggerShared evtshared)
Definition: trigger.c:3542
#define TRIGGER_EVENT_TRUNCATE
Definition: trigger.h:55
Oid tgconstrindid
Definition: reltrigger.h:33
bool RI_FKey_pk_upd_check_required(Trigger *trigger, Relation pk_rel, HeapTuple old_row, HeapTuple new_row)
Definition: ri_triggers.c:2087
static Tuplestorestate * GetTriggerTransitionTuplestore(Tuplestorestate **tss)
Definition: trigger.c:3452
#define TRIGGER_TYPE_INSERT
Definition: pg_trigger.h:100
#define AFTER_TRIGGER_FDW_FETCH
Definition: trigger.c:3264
CommandId ats_firing_id
Definition: trigger.c:3276
#define TRIGGER_EVENT_UPDATE
Definition: trigger.h:54
#define TRIGGER_EVENT_INSERT
Definition: trigger.h:52
#define RI_TRIGGER_PK
Definition: trigger.h:209
#define ItemPointerSetInvalid(pointer)
Definition: itemptr.h:149
int i
bool trig_delete_old_table
Definition: reltrigger.h:77
Tuplestorestate ** fdw_tuplestores
Definition: trigger.c:3415
AfterTriggerEventList * query_stack
Definition: trigger.c:3414
#define elog
Definition: elog.h:219
#define TRIGGER_TYPE_STATEMENT
Definition: pg_trigger.h:107
ItemPointerData ate_ctid1
Definition: trigger.c:3284
#define RI_TRIGGER_NONE
Definition: trigger.h:211
#define TRIGGER_FIRED_BY_UPDATE(event)
Definition: trigger.h:76
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
#define RelationGetRelid(relation)
Definition: rel.h:417
Tuplestorestate ** new_tuplestores
Definition: trigger.c:3418
#define ItemPointerCopy(fromPointer, toPointer)
Definition: itemptr.h:138
void AfterTriggerSetState ( ConstraintsSetStmt stmt)

Definition at line 4732 of file trigger.c.

References AccessShareLock, afterTriggerInvokeEvents(), afterTriggerMarkEvents(), SetConstraintStateData::all_isdeferred, SetConstraintStateData::all_isset, Anum_pg_constraint_conname, Anum_pg_constraint_connamespace, Anum_pg_trigger_tgconstraint, BTEqualStrategyNumber, RangeVar::catalogname, ConstraintNameNspIndexId, ConstraintRelationId, ConstraintsSetStmt::constraints, CStringGetDatum, ConstraintsSetStmt::deferred, elog, ereport, errcode(), errmsg(), ERROR, AfterTriggersData::events, fetch_search_path(), AfterTriggersData::firing_counter, get_database_name(), GetCurrentTransactionNestLevel(), GETSTRUCT, GetTransactionSnapshot(), heap_close, heap_open(), HeapTupleGetOid, HeapTupleIsValid, i, IsSubTransaction(), lappend_oid(), lfirst, lfirst_oid, list_free(), list_make1_oid, LookupExplicitNamespace(), MyDatabaseId, NIL, NULL, SetConstraintStateData::numstates, ObjectIdGetDatum, PopActiveSnapshot(), PushActiveSnapshot(), RangeVar::relname, ScanKeyInit(), RangeVar::schemaname, SetConstraintTriggerData::sct_tgisdeferred, SetConstraintTriggerData::sct_tgoid, SetConstraintStateAddItem(), SetConstraintStateCopy(), SetConstraintStateCreate(), AfterTriggersData::state, AfterTriggersData::state_stack, systable_beginscan(), systable_endscan(), systable_getnext(), TriggerConstraintIndexId, TriggerRelationId, and SetConstraintStateData::trigstates.

Referenced by standard_ProcessUtility().

4733 {
4734  int my_level = GetCurrentTransactionNestLevel();
4735 
4736  /* If we haven't already done so, initialize our state. */
4737  if (afterTriggers.state == NULL)
4739 
4740  /*
4741  * If in a subtransaction, and we didn't save the current state already,
4742  * save it so it can be restored if the subtransaction aborts.
4743  */
4744  if (my_level > 1 &&
4745  afterTriggers.state_stack[my_level] == NULL)
4746  {
4747  afterTriggers.state_stack[my_level] =
4749  }
4750 
4751  /*
4752  * Handle SET CONSTRAINTS ALL ...
4753  */
4754  if (stmt->constraints == NIL)
4755  {
4756  /*
4757  * Forget any previous SET CONSTRAINTS commands in this transaction.
4758  */
4760 
4761  /*
4762  * Set the per-transaction ALL state to known.
4763  */
4764  afterTriggers.state->all_isset = true;
4766  }
4767  else
4768  {
4769  Relation conrel;
4770  Relation tgrel;
4771  List *conoidlist = NIL;
4772  List *tgoidlist = NIL;
4773  ListCell *lc;
4774 
4775  /*
4776  * Handle SET CONSTRAINTS constraint-name [, ...]
4777  *
4778  * First, identify all the named constraints and make a list of their
4779  * OIDs. Since, unlike the SQL spec, we allow multiple constraints of
4780  * the same name within a schema, the specifications are not
4781  * necessarily unique. Our strategy is to target all matching
4782  * constraints within the first search-path schema that has any
4783  * matches, but disregard matches in schemas beyond the first match.
4784  * (This is a bit odd but it's the historical behavior.)
4785  */
4787 
4788  foreach(lc, stmt->constraints)
4789  {
4790  RangeVar *constraint = lfirst(lc);
4791  bool found;
4792  List *namespacelist;
4793  ListCell *nslc;
4794 
4795  if (constraint->catalogname)
4796  {
4797  if (strcmp(constraint->catalogname, get_database_name(MyDatabaseId)) != 0)
4798  ereport(ERROR,
4799  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
4800  errmsg("cross-database references are not implemented: \"%s.%s.%s\"",
4801  constraint->catalogname, constraint->schemaname,
4802  constraint->relname)));
4803  }
4804 
4805  /*
4806  * If we're given the schema name with the constraint, look only
4807  * in that schema. If given a bare constraint name, use the
4808  * search path to find the first matching constraint.
4809  */
4810  if (constraint->schemaname)
4811  {
4812  Oid namespaceId = LookupExplicitNamespace(constraint->schemaname,
4813  false);
4814 
4815  namespacelist = list_make1_oid(namespaceId);
4816  }
4817  else
4818  {
4819  namespacelist = fetch_search_path(true);
4820  }
4821 
4822  found = false;
4823  foreach(nslc, namespacelist)
4824  {
4825  Oid namespaceId = lfirst_oid(nslc);
4826  SysScanDesc conscan;
4827  ScanKeyData skey[2];
4828  HeapTuple tup;
4829 
4830  ScanKeyInit(&skey[0],
4832  BTEqualStrategyNumber, F_NAMEEQ,
4833  CStringGetDatum(constraint->relname));
4834  ScanKeyInit(&skey[1],
4836  BTEqualStrategyNumber, F_OIDEQ,
4837  ObjectIdGetDatum(namespaceId));
4838 
4839  conscan = systable_beginscan(conrel, ConstraintNameNspIndexId,
4840  true, NULL, 2, skey);
4841 
4842  while (HeapTupleIsValid(tup = systable_getnext(conscan)))
4843  {
4845 
4846  if (con->condeferrable)
4847  conoidlist = lappend_oid(conoidlist,
4848  HeapTupleGetOid(tup));
4849  else if (stmt->deferred)
4850  ereport(ERROR,
4851  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
4852  errmsg("constraint \"%s\" is not deferrable",
4853  constraint->relname)));
4854  found = true;
4855  }
4856 
4857  systable_endscan(conscan);
4858 
4859  /*
4860  * Once we've found a matching constraint we do not search
4861  * later parts of the search path.
4862  */
4863  if (found)
4864  break;
4865  }
4866 
4867  list_free(namespacelist);
4868 
4869  /*
4870  * Not found ?
4871  */
4872  if (!found)
4873  ereport(ERROR,
4874  (errcode(ERRCODE_UNDEFINED_OBJECT),
4875  errmsg("constraint \"%s\" does not exist",
4876  constraint->relname)));
4877  }
4878 
4879  heap_close(conrel, AccessShareLock);
4880 
4881  /*
4882  * Now, locate the trigger(s) implementing each of these constraints,
4883  * and make a list of their OIDs.
4884  */
4886 
4887  foreach(lc, conoidlist)
4888  {
4889  Oid conoid = lfirst_oid(lc);
4890  bool found;
4891  ScanKeyData skey;
4892  SysScanDesc tgscan;
4893  HeapTuple htup;
4894 
4895  found = false;
4896 
4897  ScanKeyInit(&skey,
4899  BTEqualStrategyNumber, F_OIDEQ,
4900  ObjectIdGetDatum(conoid));
4901 
4902  tgscan = systable_beginscan(tgrel, TriggerConstraintIndexId, true,
4903  NULL, 1, &skey);
4904 
4905  while (HeapTupleIsValid(htup = systable_getnext(tgscan)))
4906  {
4907  Form_pg_trigger pg_trigger = (Form_pg_trigger) GETSTRUCT(htup);
4908 
4909  /*
4910  * Silently skip triggers that are marked as non-deferrable in
4911  * pg_trigger. This is not an error condition, since a
4912  * deferrable RI constraint may have some non-deferrable
4913  * actions.
4914  */
4915  if (pg_trigger->tgdeferrable)
4916  tgoidlist = lappend_oid(tgoidlist,
4917  HeapTupleGetOid(htup));
4918 
4919  found = true;
4920  }
4921 
4922  systable_endscan(tgscan);
4923 
4924  /* Safety check: a deferrable constraint should have triggers */
4925  if (!found)
4926  elog(ERROR, "no triggers found for constraint with OID %u",
4927  conoid);
4928  }
4929 
4930  heap_close(tgrel, AccessShareLock);
4931 
4932  /*
4933  * Now we can set the trigger states of individual triggers for this
4934  * xact.
4935  */
4936  foreach(lc, tgoidlist)
4937  {
4938  Oid tgoid = lfirst_oid(lc);
4940  bool found = false;
4941  int i;
4942 
4943  for (i = 0; i < state->numstates; i++)
4944  {
4945  if (state->trigstates[i].sct_tgoid == tgoid)
4946  {
4947  state->trigstates[i].sct_tgisdeferred = stmt->deferred;
4948  found = true;
4949  break;
4950  }
4951  }
4952  if (!found)
4953  {
4955  SetConstraintStateAddItem(state, tgoid, stmt->deferred);
4956  }
4957  }
4958  }
4959 
4960  /*
4961  * SQL99 requires that when a constraint is set to IMMEDIATE, any deferred
4962  * checks against that constraint must be made when the SET CONSTRAINTS
4963  * command is executed -- i.e. the effects of the SET CONSTRAINTS command
4964  * apply retroactively. We've updated the constraints state, so scan the
4965  * list of previously deferred events to fire any that have now become
4966  * immediate.
4967  *
4968  * Obviously, if this was SET ... DEFERRED then it can't have converted
4969  * any unfired events to immediate, so we need do nothing in that case.
4970  */
4971  if (!stmt->deferred)
4972  {
4974  bool snapshot_set = false;
4975 
4976  while (afterTriggerMarkEvents(events, NULL, true))
4977  {
4978  CommandId firing_id = afterTriggers.firing_counter++;
4979 
4980  /*
4981  * Make sure a snapshot has been established in case trigger
4982  * functions need one. Note that we avoid setting a snapshot if
4983  * we don't find at least one trigger that has to be fired now.
4984  * This is so that BEGIN; SET CONSTRAINTS ...; SET TRANSACTION
4985  * ISOLATION LEVEL SERIALIZABLE; ... works properly. (If we are
4986  * at the start of a transaction it's not possible for any trigger
4987  * events to be queued yet.)
4988  */
4989  if (!snapshot_set)
4990  {
4992  snapshot_set = true;
4993  }
4994 
4995  /*
4996  * We can delete fired events if we are at top transaction level,
4997  * but we'd better not if inside a subtransaction, since the
4998  * subtransaction could later get rolled back.
4999  */
5000  if (afterTriggerInvokeEvents(events, firing_id, NULL,
5001  !IsSubTransaction()))
5002  break; /* all fired */
5003  }
5004 
5005  if (snapshot_set)
5007  }
5008 }
#define NIL
Definition: pg_list.h:69
uint32 CommandId
Definition: c.h:411
Oid LookupExplicitNamespace(const char *nspname, bool missing_ok)
Definition: namespace.c:2810
void systable_endscan(SysScanDesc sysscan)
Definition: genam.c:499
#define GETSTRUCT(TUP)
Definition: htup_details.h:656
#define Anum_pg_trigger_tgconstraint
Definition: pg_trigger.h:87
SetConstraintTriggerData trigstates[FLEXIBLE_ARRAY_MEMBER]
Definition: trigger.c:3220
#define AccessShareLock
Definition: lockdefs.h:36
int errcode(int sqlerrcode)
Definition: elog.c:575
static SetConstraintState SetConstraintStateAddItem(SetConstraintState state, Oid tgoid, bool tgisdeferred)
Definition: trigger.c:4702
static bool afterTriggerInvokeEvents(AfterTriggerEventList *events, CommandId firing_id, EState *estate, bool delete_ok)
Definition: trigger.c:3994
void PopActiveSnapshot(void)
Definition: snapmgr.c:807
#define heap_close(r, l)
Definition: heapam.h:97
#define Anum_pg_constraint_conname
unsigned int Oid
Definition: postgres_ext.h:31
List * lappend_oid(List *list, Oid datum)
Definition: list.c:164
Snapshot GetTransactionSnapshot(void)
Definition: snapmgr.c:300
SysScanDesc systable_beginscan(Relation heapRelation, Oid indexId, bool indexOK, Snapshot snapshot, int nkeys, ScanKey key)
Definition: genam.c:328
char * schemaname
Definition: primnodes.h:67
char * relname
Definition: primnodes.h:68
HeapTuple systable_getnext(SysScanDesc sysscan)
Definition: genam.c:416
#define ObjectIdGetDatum(X)
Definition: postgres.h:513
#define ERROR
Definition: elog.h:43
SetConstraintState * state_stack
Definition: trigger.c:3424
SetConstraintState state
Definition: trigger.c:3411
char * get_database_name(Oid dbid)
Definition: dbcommands.c:2056
void PushActiveSnapshot(Snapshot snap)
Definition: snapmgr.c:728
#define CStringGetDatum(X)
Definition: postgres.h:584
#define TriggerConstraintIndexId
Definition: indexing.h:247
#define ereport(elevel, rest)
Definition: elog.h:122
static SetConstraintState SetConstraintStateCreate(int numalloc)
Definition: trigger.c:4657
#define list_make1_oid(x1)
Definition: pg_list.h:151
Oid MyDatabaseId
Definition: globals.c:76
#define Anum_pg_constraint_connamespace
Relation heap_open(Oid relationId, LOCKMODE lockmode)
Definition: heapam.c:1284
CommandId firing_counter
Definition: trigger.c:3410
#define ConstraintNameNspIndexId
Definition: indexing.h:124
int GetCurrentTransactionNestLevel(void)
Definition: xact.c:761
FormData_pg_constraint * Form_pg_constraint
#define HeapTupleIsValid(tuple)
Definition: htup.h:77
#define NULL
Definition: c.h:229
#define lfirst(lc)
Definition: pg_list.h:106
Definition: regguts.h:298
#define TriggerRelationId
Definition: pg_trigger.h:34
FormData_pg_trigger * Form_pg_trigger
Definition: pg_trigger.h:72
bool IsSubTransaction(void)
Definition: xact.c:4378
int errmsg(const char *fmt,...)
Definition: elog.c:797
void list_free(List *list)
Definition: list.c:1133
int i
static bool afterTriggerMarkEvents(AfterTriggerEventList *events, AfterTriggerEventList *move_list, bool immediate_only)
Definition: trigger.c:3922
void ScanKeyInit(ScanKey entry, AttrNumber attributeNumber, StrategyNumber strategy, RegProcedure procedure, Datum argument)
Definition: scankey.c:76
AfterTriggerEventList events
Definition: trigger.c:3412
#define ConstraintRelationId
Definition: pg_constraint.h:29
#define elog
Definition: elog.h:219
#define HeapTupleGetOid(tuple)
Definition: htup_details.h:695
Definition: pg_list.h:45
List * fetch_search_path(bool includeImplicit)
Definition: namespace.c:4141
static AfterTriggersData afterTriggers
Definition: trigger.c:3431
char * catalogname
Definition: primnodes.h:66
#define BTEqualStrategyNumber
Definition: stratnum.h:31
#define lfirst_oid(lc)
Definition: pg_list.h:108
static SetConstraintState SetConstraintStateCopy(SetConstraintState state)
Definition: trigger.c:4682
static void ConvertTriggerToFK ( CreateTrigStmt stmt,
Oid  funcoid 
)
static

Definition at line 960 of file trigger.c.

References _, appendStringInfo(), appendStringInfoChar(), appendStringInfoString(), arg, OldTriggerInfo::args, CreateTrigStmt::args, AT_AddConstraint, buf, PlannedStmt::canSetTag, CMD_UTILITY, AlterTableStmt::cmds, PlannedStmt::commandType, Constraint::conname, CONSTR_FOREIGN, CreateTrigStmt::constrrel, Constraint::contype, copyObject, StringInfoData::data, AlterTableCmd::def, Constraint::deferrable, CreateTrigStmt::deferrable, elog, equal(), ereport, errdetail_internal(), errmsg(), ERROR, Constraint::fk_attrs, Constraint::fk_del_action, Constraint::fk_matchtype, Constraint::fk_upd_action, FKCONSTR_ACTION_CASCADE, FKCONSTR_ACTION_NOACTION, FKCONSTR_ACTION_RESTRICT, FKCONSTR_ACTION_SETDEFAULT, FKCONSTR_ACTION_SETNULL, FKCONSTR_MATCH_FULL, FKCONSTR_MATCH_SIMPLE, OldTriggerInfo::funcoids, gettext_noop, i, Constraint::initdeferred, CreateTrigStmt::initdeferred, Constraint::initially_valid, initStringInfo(), InvalidOid, lappend(), lfirst, linitial, list_delete_ptr(), list_make1, Constraint::location, lsecond, lthird, makeNode, makeRangeVar(), MemoryContextSwitchTo(), NIL, None_Receiver, NOTICE, NULL, OBJECT_TABLE, palloc0(), pfree(), Constraint::pk_attrs, Constraint::pktable, PROCESS_UTILITY_SUBCOMMAND, ProcessUtility(), quote_identifier(), AlterTableStmt::relation, CreateTrigStmt::relation, AlterTableStmt::relkind, Constraint::skip_validation, PlannedStmt::stmt_len, PlannedStmt::stmt_location, strVal, AlterTableCmd::subtype, TopMemoryContext, and PlannedStmt::utilityStmt.

Referenced by CreateTrigger().

961 {
962  static List *info_list = NIL;
963 
964  static const char *const funcdescr[3] = {
965  gettext_noop("Found referenced table's UPDATE trigger."),
966  gettext_noop("Found referenced table's DELETE trigger."),
967  gettext_noop("Found referencing table's trigger.")
968  };
969 
970  char *constr_name;
971  char *fk_table_name;
972  char *pk_table_name;
973  char fk_matchtype = FKCONSTR_MATCH_SIMPLE;
974  List *fk_attrs = NIL;
975  List *pk_attrs = NIL;
977  int funcnum;
978  OldTriggerInfo *info = NULL;
979  ListCell *l;
980  int i;
981 
982  /* Parse out the trigger arguments */
983  constr_name = strVal(linitial(stmt->args));
984  fk_table_name = strVal(lsecond(stmt->args));
985  pk_table_name = strVal(lthird(stmt->args));
986  i = 0;
987  foreach(l, stmt->args)
988  {
989  Value *arg = (Value *) lfirst(l);
990 
991  i++;
992  if (i < 4) /* skip constraint and table names */
993  continue;
994  if (i == 4) /* handle match type */
995  {
996  if (strcmp(strVal(arg), "FULL") == 0)
997  fk_matchtype = FKCONSTR_MATCH_FULL;
998  else
999  fk_matchtype = FKCONSTR_MATCH_SIMPLE;
1000  continue;
1001  }
1002  if (i % 2)
1003  fk_attrs = lappend(fk_attrs, arg);
1004  else
1005  pk_attrs = lappend(pk_attrs, arg);
1006  }
1007 
1008  /* Prepare description of constraint for use in messages */
1009  initStringInfo(&buf);
1010  appendStringInfo(&buf, "FOREIGN KEY %s(",
1011  quote_identifier(fk_table_name));
1012  i = 0;
1013  foreach(l, fk_attrs)
1014  {
1015  Value *arg = (Value *) lfirst(l);
1016 
1017  if (i++ > 0)
1018  appendStringInfoChar(&buf, ',');
1020  }
1021  appendStringInfo(&buf, ") REFERENCES %s(",
1022  quote_identifier(pk_table_name));
1023  i = 0;
1024  foreach(l, pk_attrs)
1025  {
1026  Value *arg = (Value *) lfirst(l);
1027 
1028  if (i++ > 0)
1029  appendStringInfoChar(&buf, ',');
1031  }
1032  appendStringInfoChar(&buf, ')');
1033 
1034  /* Identify class of trigger --- update, delete, or referencing-table */
1035  switch (funcoid)
1036  {
1037  case F_RI_FKEY_CASCADE_UPD:
1038  case F_RI_FKEY_RESTRICT_UPD:
1039  case F_RI_FKEY_SETNULL_UPD:
1040  case F_RI_FKEY_SETDEFAULT_UPD:
1041  case F_RI_FKEY_NOACTION_UPD:
1042  funcnum = 0;
1043  break;
1044 
1045  case F_RI_FKEY_CASCADE_DEL:
1046  case F_RI_FKEY_RESTRICT_DEL:
1047  case F_RI_FKEY_SETNULL_DEL:
1048  case F_RI_FKEY_SETDEFAULT_DEL:
1049  case F_RI_FKEY_NOACTION_DEL:
1050  funcnum = 1;
1051  break;
1052 
1053  default:
1054  funcnum = 2;
1055  break;
1056  }
1057 
1058  /* See if we have a match to this trigger */
1059  foreach(l, info_list)
1060  {
1061  info = (OldTriggerInfo *) lfirst(l);
1062  if (info->funcoids[funcnum] == InvalidOid &&
1063  equal(info->args, stmt->args))
1064  {
1065  info->funcoids[funcnum] = funcoid;
1066  break;
1067  }
1068  }
1069 
1070  if (l == NULL)
1071  {
1072  /* First trigger of set, so create a new list entry */
1073  MemoryContext oldContext;
1074 
1075  ereport(NOTICE,
1076  (errmsg("ignoring incomplete trigger group for constraint \"%s\" %s",
1077  constr_name, buf.data),
1078  errdetail_internal("%s", _(funcdescr[funcnum]))));
1080  info = (OldTriggerInfo *) palloc0(sizeof(OldTriggerInfo));
1081  info->args = copyObject(stmt->args);
1082  info->funcoids[funcnum] = funcoid;
1083  info_list = lappend(info_list, info);
1084  MemoryContextSwitchTo(oldContext);
1085  }
1086  else if (info->funcoids[0] == InvalidOid ||
1087  info->funcoids[1] == InvalidOid ||
1088  info->funcoids[2] == InvalidOid)
1089  {
1090  /* Second trigger of set */
1091  ereport(NOTICE,
1092  (errmsg("ignoring incomplete trigger group for constraint \"%s\" %s",
1093  constr_name, buf.data),
1094  errdetail_internal("%s", _(funcdescr[funcnum]))));
1095  }
1096  else
1097  {
1098  /* OK, we have a set, so make the FK constraint ALTER TABLE cmd */
1101  Constraint *fkcon = makeNode(Constraint);
1102  PlannedStmt *wrapper = makeNode(PlannedStmt);
1103 
1104  ereport(NOTICE,
1105  (errmsg("converting trigger group into constraint \"%s\" %s",
1106  constr_name, buf.data),
1107  errdetail_internal("%s", _(funcdescr[funcnum]))));
1108  fkcon->contype = CONSTR_FOREIGN;
1109  fkcon->location = -1;
1110  if (funcnum == 2)
1111  {
1112  /* This trigger is on the FK table */
1113  atstmt->relation = stmt->relation;
1114  if (stmt->constrrel)
1115  fkcon->pktable = stmt->constrrel;
1116  else
1117  {
1118  /* Work around ancient pg_dump bug that omitted constrrel */
1119  fkcon->pktable = makeRangeVar(NULL, pk_table_name, -1);
1120  }
1121  }
1122  else
1123  {
1124  /* This trigger is on the PK table */
1125  fkcon->pktable = stmt->relation;
1126  if (stmt->constrrel)
1127  atstmt->relation = stmt->constrrel;
1128  else
1129  {
1130  /* Work around ancient pg_dump bug that omitted constrrel */
1131  atstmt->relation = makeRangeVar(NULL, fk_table_name, -1);
1132  }
1133  }
1134  atstmt->cmds = list_make1(atcmd);
1135  atstmt->relkind = OBJECT_TABLE;
1136  atcmd->subtype = AT_AddConstraint;
1137  atcmd->def = (Node *) fkcon;
1138  if (strcmp(constr_name, "<unnamed>") == 0)
1139  fkcon->conname = NULL;
1140  else
1141  fkcon->conname = constr_name;
1142  fkcon->fk_attrs = fk_attrs;
1143  fkcon->pk_attrs = pk_attrs;
1144  fkcon->fk_matchtype = fk_matchtype;
1145  switch (info->funcoids[0])
1146  {
1147  case F_RI_FKEY_NOACTION_UPD:
1149  break;
1150  case F_RI_FKEY_CASCADE_UPD:
1152  break;
1153  case F_RI_FKEY_RESTRICT_UPD:
1155  break;
1156  case F_RI_FKEY_SETNULL_UPD:
1158  break;
1159  case F_RI_FKEY_SETDEFAULT_UPD:
1161  break;
1162  default:
1163  /* can't get here because of earlier checks */
1164  elog(ERROR, "confused about RI update function");
1165  }
1166  switch (info->funcoids[1])
1167  {
1168  case F_RI_FKEY_NOACTION_DEL:
1170  break;
1171  case F_RI_FKEY_CASCADE_DEL:
1173  break;
1174  case F_RI_FKEY_RESTRICT_DEL:
1176  break;
1177  case F_RI_FKEY_SETNULL_DEL:
1179  break;
1180  case F_RI_FKEY_SETDEFAULT_DEL:
1182  break;
1183  default:
1184  /* can't get here because of earlier checks */
1185  elog(ERROR, "confused about RI delete function");
1186  }
1187  fkcon->deferrable = stmt->deferrable;
1188  fkcon->initdeferred = stmt->initdeferred;
1189  fkcon->skip_validation = false;
1190  fkcon->initially_valid = true;
1191 
1192  /* finally, wrap it in a dummy PlannedStmt */
1193  wrapper->commandType = CMD_UTILITY;
1194  wrapper->canSetTag = false;
1195  wrapper->utilityStmt = (Node *) atstmt;
1196  wrapper->stmt_location = -1;
1197  wrapper->stmt_len = -1;
1198 
1199  /* ... and execute it */
1200  ProcessUtility(wrapper,
1201  "(generated ALTER TABLE ADD FOREIGN KEY command)",
1203  None_Receiver, NULL);
1204 
1205  /* Remove the matched item from the list */
1206  info_list = list_delete_ptr(info_list, info);
1207  pfree(info);
1208  /* We leak the copied args ... not worth worrying about */
1209  }
1210 }
#define NIL
Definition: pg_list.h:69
#define FKCONSTR_MATCH_SIMPLE
Definition: parsenodes.h:2049
const char * quote_identifier(const char *ident)
Definition: ruleutils.c:10280
bool equal(const void *a, const void *b)
Definition: equalfuncs.c:2962
#define FKCONSTR_ACTION_NOACTION
Definition: parsenodes.h:2040
char fk_matchtype
Definition: parsenodes.h:2086
#define FKCONSTR_ACTION_SETDEFAULT
Definition: parsenodes.h:2044
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
#define gettext_noop(x)
Definition: c.h:139
Definition: nodes.h:509
#define strVal(v)
Definition: value.h:54
void ProcessUtility(PlannedStmt *pstmt, const char *queryString, ProcessUtilityContext context, ParamListInfo params, QueryEnvironment *queryEnv, DestReceiver *dest, char *completionTag)
Definition: utility.c:335
bool initdeferred
Definition: parsenodes.h:2059
AlterTableType subtype
Definition: parsenodes.h:1753
List * pk_attrs
Definition: parsenodes.h:2085
char * conname
Definition: parsenodes.h:2057
List * list_delete_ptr(List *list, void *datum)
Definition: list.c:590
DestReceiver * None_Receiver
Definition: dest.c:91
int stmt_len
Definition: plannodes.h:98
#define lsecond(l)
Definition: pg_list.h:116
int errdetail_internal(const char *fmt,...)
Definition: elog.c:900
#define list_make1(x1)
Definition: pg_list.h:139
RangeVar * constrrel
Definition: parsenodes.h:2343
void pfree(void *pointer)
Definition: mcxt.c:950
void appendStringInfo(StringInfo str, const char *fmt,...)
Definition: stringinfo.c:78
#define linitial(l)
Definition: pg_list.h:111
#define ERROR
Definition: elog.h:43
bool deferrable
Definition: parsenodes.h:2058
void appendStringInfoString(StringInfo str, const char *s)
Definition: stringinfo.c:157
int stmt_location
Definition: plannodes.h:97
static char * buf
Definition: pg_test_fsync.c:66
Node * utilityStmt
Definition: plannodes.h:94
Oid funcoids[3]
Definition: trigger.c:955
#define ereport(elevel, rest)
Definition: elog.h:122
ObjectType relkind
Definition: parsenodes.h:1668
MemoryContext TopMemoryContext
Definition: mcxt.c:43
#define FKCONSTR_ACTION_CASCADE
Definition: parsenodes.h:2042
List * lappend(List *list, void *datum)
Definition: list.c:128
void appendStringInfoChar(StringInfo str, char ch)
Definition: stringinfo.c:169
void initStringInfo(StringInfo str)
Definition: stringinfo.c:46
#define FKCONSTR_MATCH_FULL
Definition: parsenodes.h:2047
bool canSetTag
Definition: plannodes.h:53
void * palloc0(Size size)
Definition: mcxt.c:878
CmdType commandType
Definition: plannodes.h:45
#define InvalidOid
Definition: postgres_ext.h:36
bool initially_valid
Definition: parsenodes.h:2094
#define NOTICE
Definition: elog.h:37
#define makeNode(_type_)
Definition: nodes.h:557
char fk_del_action
Definition: parsenodes.h:2088
#define NULL
Definition: c.h:229
#define lfirst(lc)
Definition: pg_list.h:106
Definition: value.h:42
List * args
Definition: trigger.c:954
int errmsg(const char *fmt,...)
Definition: elog.c:797
RangeVar * relation
Definition: parsenodes.h:1666
int i
RangeVar * relation
Definition: parsenodes.h:2327
ConstrType contype
Definition: parsenodes.h:2054
void * arg
#define FKCONSTR_ACTION_RESTRICT
Definition: parsenodes.h:2041
#define lthird(l)
Definition: pg_list.h:121
#define elog
Definition: elog.h:219
#define copyObject(obj)
Definition: nodes.h:621
RangeVar * pktable
Definition: parsenodes.h:2083
#define FKCONSTR_ACTION_SETNULL
Definition: parsenodes.h:2043
Definition: pg_list.h:45
bool skip_validation
Definition: parsenodes.h:2093
#define _(x)
Definition: elog.c:84
List * fk_attrs
Definition: parsenodes.h:2084
RangeVar * makeRangeVar(char *schemaname, char *relname, int location)
Definition: makefuncs.c:419
char fk_upd_action
Definition: parsenodes.h:2087
TriggerDesc* CopyTriggerDesc ( TriggerDesc trigdesc)

Definition at line 1852 of file trigger.c.

References i, NULL, TriggerDesc::numtriggers, palloc(), pstrdup(), Trigger::tgargs, Trigger::tgattr, Trigger::tgname, Trigger::tgnargs, Trigger::tgnattr, Trigger::tgnewtable, Trigger::tgoldtable, Trigger::tgqual, and TriggerDesc::triggers.

Referenced by InitResultRelInfo(), and RelationBuildTriggers().

1853 {
1854  TriggerDesc *newdesc;
1855  Trigger *trigger;
1856  int i;
1857 
1858  if (trigdesc == NULL || trigdesc->numtriggers <= 0)
1859  return NULL;
1860 
1861  newdesc = (TriggerDesc *) palloc(sizeof(TriggerDesc));
1862  memcpy(newdesc, trigdesc, sizeof(TriggerDesc));
1863 
1864  trigger = (Trigger *) palloc(trigdesc->numtriggers * sizeof(Trigger));
1865  memcpy(trigger, trigdesc->triggers,
1866  trigdesc->numtriggers * sizeof(Trigger));
1867  newdesc->triggers = trigger;
1868 
1869  for (i = 0; i < trigdesc->numtriggers; i++)
1870  {
1871  trigger->tgname = pstrdup(trigger->tgname);
1872  if (trigger->tgnattr > 0)
1873  {
1874  int16 *newattr;
1875 
1876  newattr = (int16 *) palloc(trigger->tgnattr * sizeof(int16));
1877  memcpy(newattr, trigger->tgattr,
1878  trigger->tgnattr * sizeof(int16));
1879  trigger->tgattr = newattr;
1880  }
1881  if (trigger->tgnargs > 0)
1882  {
1883  char **newargs;
1884  int16 j;
1885 
1886  newargs = (char **) palloc(trigger->tgnargs * sizeof(char *));
1887  for (j = 0; j < trigger->tgnargs; j++)
1888  newargs[j] = pstrdup(trigger->tgargs[j]);
1889  trigger->tgargs = newargs;
1890  }
1891  if (trigger->tgqual)
1892  trigger->tgqual = pstrdup(trigger->tgqual);
1893  if (trigger->tgoldtable)
1894  trigger->tgoldtable = pstrdup(trigger->tgoldtable);
1895  if (trigger->tgnewtable)
1896  trigger->tgnewtable = pstrdup(trigger->tgnewtable);
1897  trigger++;
1898  }
1899 
1900  return newdesc;
1901 }
signed short int16
Definition: c.h:255
char * pstrdup(const char *in)
Definition: mcxt.c:1077
char * tgqual
Definition: reltrigger.h:41
char * tgname
Definition: reltrigger.h:27
Trigger * triggers
Definition: reltrigger.h:48
int numtriggers
Definition: reltrigger.h:49
char ** tgargs
Definition: reltrigger.h:40
int16 * tgattr
Definition: reltrigger.h:39
char * tgnewtable
Definition: reltrigger.h:43
#define NULL
Definition: c.h:229
int16 tgnattr
Definition: reltrigger.h:38
void * palloc(Size size)
Definition: mcxt.c:849
int i
int16 tgnargs
Definition: reltrigger.h:37
char * tgoldtable
Definition: reltrigger.h:42
ObjectAddress CreateTrigger ( CreateTrigStmt stmt,
const char *  queryString,
Oid  relOid,
Oid  refRelOid,
Oid  constraintOid,
Oid  indexOid,
bool  isInternal 
)

Definition at line 138 of file trigger.c.

References AccessShareLock, ACL_EXECUTE, ACL_KIND_CLASS, ACL_KIND_PROC, ACL_TRIGGER, aclcheck_error(), ACLCHECK_OK, addRangeTableEntryForRelation(), addRTEtoQuery(), allowSystemTableMods, Anum_pg_trigger_tgargs, Anum_pg_trigger_tgattr, Anum_pg_trigger_tgconstraint, Anum_pg_trigger_tgconstrindid, Anum_pg_trigger_tgconstrrelid, Anum_pg_trigger_tgdeferrable, Anum_pg_trigger_tgenabled, Anum_pg_trigger_tgfoid, Anum_pg_trigger_tginitdeferred, Anum_pg_trigger_tgisinternal, Anum_pg_trigger_tgname, Anum_pg_trigger_tgnargs, Anum_pg_trigger_tgnewtable, Anum_pg_trigger_tgoldtable, Anum_pg_trigger_tgqual, Anum_pg_trigger_tgrelid, Anum_pg_trigger_tgtype, generate_unaccent_rules::args, CreateTrigStmt::args, Assert, assign_expr_collations(), attnameAttNum(), BoolGetDatum, BTEqualStrategyNumber, buildint2vector(), byteain(), CatalogTupleInsert(), CatalogTupleUpdate(), CharGetDatum, ObjectAddress::classId, CreateTrigStmt::columns, CONSTRAINT_TRIGGER, ConstraintRelationId, CreateTrigStmt::constrrel, ConvertTriggerToFK(), copyObject, CreateConstraintEntry(), CStringGetDatum, CStringGetTextDatum, DatumGetPointer, CreateTrigStmt::deferrable, DEPENDENCY_AUTO, DEPENDENCY_INTERNAL, DEPENDENCY_NORMAL, DirectFunctionCall1, elog, ereport, errcode(), ERRCODE_DUPLICATE_OBJECT, errdetail(), errhint(), errmsg(), ERROR, CreateTrigStmt::events, EXPR_KIND_TRIGGER_WHEN, free_parsestate(), CreateTrigStmt::funcname, get_func_rettype(), get_rel_name(), GetNewOid(), GETSTRUCT, GetUserId(), heap_close, heap_form_tuple(), heap_freetuple(), heap_open(), heap_openrv(), HeapTupleIsValid, HeapTupleSetOid, i, CreateTrigStmt::initdeferred, Int16GetDatum, InvalidAttrNumber, InvalidObjectAddress, InvalidOid, InvokeObjectPostCreateHookArg, CreateTrigStmt::isconstraint, TriggerTransition::isNew, IsSystemRelation(), TriggerTransition::isTable, lfirst, lfirst_node, list_length(), Var::location, LockRelationOid(), LookupFuncName(), make_parsestate(), makeAlias(), name, TriggerTransition::name, NAMEDATALEN, namein(), NameListToString(), namestrcmp(), Natts_pg_trigger, NIL, nodeToString(), NoLock, NULL, ObjectAddress::objectId, ObjectIdGetDatum, ObjectAddress::objectSubId, OidIsValid, OPAQUEOID, ParseState::p_rtable, ParseState::p_sourcetext, palloc(), parser_errposition(), pfree(), pg_class_aclcheck(), pg_proc_aclcheck(), PointerGetDatum, ProcedureRelationId, PRS2_NEW_VARNO, PRS2_OLD_VARNO, pull_var_clause(), RangeVarGetRelid, RelationData::rd_att, RelationData::rd_rel, recordDependencyOn(), recordDependencyOnExpr(), CreateTrigStmt::relation, RelationGetNamespace, RelationGetRelationName, RelationGetRelid, RelationRelationId, RELKIND_FOREIGN_TABLE, RELKIND_PARTITIONED_TABLE, RELKIND_RELATION, RELKIND_VIEW, RELOID, RI_FKey_trigger_type(), RI_TRIGGER_NONE, CreateTrigStmt::row, RowExclusiveLock, ScanKeyInit(), SearchSysCacheCopy1, SetFunctionReturnType(), ShareRowExclusiveLock, snprintf(), strVal, systable_beginscan(), systable_endscan(), systable_getnext(), HeapTupleData::t_self, CreateTrigStmt::timing, transformWhereClause(), CreateTrigStmt::transitionRels, TRIGGER_CLEAR_TYPE, TRIGGER_FIRES_ON_ORIGIN, TRIGGER_FOR_BEFORE, TRIGGER_FOR_DELETE, TRIGGER_FOR_INSERT, TRIGGER_FOR_INSTEAD, TRIGGER_FOR_ROW, TRIGGER_FOR_TRUNCATE, TRIGGER_FOR_UPDATE, TRIGGER_SETT_ROW, TRIGGER_TYPE_AFTER, TRIGGER_TYPE_BEFORE, TRIGGER_TYPE_INSTEAD, TRIGGEROID, TriggerRelationId, TriggerRelidNameIndexId, CreateTrigStmt::trigname, values, Var::varattno, Var::varno, WARNING, and CreateTrigStmt::whenClause.

Referenced by CreateFKCheckTrigger(), createForeignKeyTriggers(), index_constraint_create(), and ProcessUtilitySlow().

141 {
142  int16 tgtype;
143  int ncolumns;
144  int16 *columns;
145  int2vector *tgattr;
146  Node *whenClause;
147  List *whenRtable;
148  char *qual;
150  bool nulls[Natts_pg_trigger];
151  Relation rel;
152  AclResult aclresult;
153  Relation tgrel;
154  SysScanDesc tgscan;
155  ScanKeyData key;
156  Relation pgrel;
157  HeapTuple tuple;
158  Oid fargtypes[1]; /* dummy */
159  Oid funcoid;
160  Oid funcrettype;
161  Oid trigoid;
162  char internaltrigname[NAMEDATALEN];
163  char *trigname;
164  Oid constrrelid = InvalidOid;
165  ObjectAddress myself,
166  referenced;
167  char *oldtablename = NULL;
168  char *newtablename = NULL;
169 
170  if (OidIsValid(relOid))
171  rel = heap_open(relOid, ShareRowExclusiveLock);
172  else
174 
175  /*
176  * Triggers must be on tables or views, and there are additional
177  * relation-type-specific restrictions.
178  */
179  if (rel->rd_rel->relkind == RELKIND_RELATION ||
180  rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
181  {
182  /* Tables can't have INSTEAD OF triggers */
183  if (stmt->timing != TRIGGER_TYPE_BEFORE &&
184  stmt->timing != TRIGGER_TYPE_AFTER)
185  ereport(ERROR,
186  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
187  errmsg("\"%s\" is a table",
189  errdetail("Tables cannot have INSTEAD OF triggers.")));
190  /* Disallow ROW triggers on partitioned tables */
191  if (stmt->row && rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
192  ereport(ERROR,
193  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
194  errmsg("\"%s\" is a partitioned table",
196  errdetail("Partitioned tables cannot have ROW triggers.")));
197  }
198  else if (rel->rd_rel->relkind == RELKIND_VIEW)
199  {
200  /*
201  * Views can have INSTEAD OF triggers (which we check below are
202  * row-level), or statement-level BEFORE/AFTER triggers.
203  */
204  if (stmt->timing != TRIGGER_TYPE_INSTEAD && stmt->row)
205  ereport(ERROR,
206  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
207  errmsg("\"%s\" is a view",
209  errdetail("Views cannot have row-level BEFORE or AFTER triggers.")));
210  /* Disallow TRUNCATE triggers on VIEWs */
211  if (TRIGGER_FOR_TRUNCATE(stmt->events))
212  ereport(ERROR,
213  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
214  errmsg("\"%s\" is a view",
216  errdetail("Views cannot have TRUNCATE triggers.")));
217  }
218  else if (rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
219  {
220  if (stmt->timing != TRIGGER_TYPE_BEFORE &&
221  stmt->timing != TRIGGER_TYPE_AFTER)
222  ereport(ERROR,
223  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
224  errmsg("\"%s\" is a foreign table",
226  errdetail("Foreign tables cannot have INSTEAD OF triggers.")));
227 
228  if (TRIGGER_FOR_TRUNCATE(stmt->events))
229  ereport(ERROR,
230  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
231  errmsg("\"%s\" is a foreign table",
233  errdetail("Foreign tables cannot have TRUNCATE triggers.")));
234 
235  if (stmt->isconstraint)
236  ereport(ERROR,
237  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
238  errmsg("\"%s\" is a foreign table",
240  errdetail("Foreign tables cannot have constraint triggers.")));
241  }
242  else
243  ereport(ERROR,
244  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
245  errmsg("\"%s\" is not a table or view",
246  RelationGetRelationName(rel))));
247 
249  ereport(ERROR,
250  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
251  errmsg("permission denied: \"%s\" is a system catalog",
252  RelationGetRelationName(rel))));
253 
254  if (stmt->isconstraint)
255  {
256  /*
257  * We must take a lock on the target relation to protect against
258  * concurrent drop. It's not clear that AccessShareLock is strong
259  * enough, but we certainly need at least that much... otherwise, we
260  * might end up creating a pg_constraint entry referencing a
261  * nonexistent table.
262  */
263  if (OidIsValid(refRelOid))
264  {
265  LockRelationOid(refRelOid, AccessShareLock);
266  constrrelid = refRelOid;
267  }
268  else if (stmt->constrrel != NULL)
269  constrrelid = RangeVarGetRelid(stmt->constrrel, AccessShareLock,
270  false);
271  }
272 
273  /* permission checks */
274  if (!isInternal)
275  {
276  aclresult = pg_class_aclcheck(RelationGetRelid(rel), GetUserId(),
277  ACL_TRIGGER);
278  if (aclresult != ACLCHECK_OK)
279  aclcheck_error(aclresult, ACL_KIND_CLASS,
281 
282  if (OidIsValid(constrrelid))
283  {
284  aclresult = pg_class_aclcheck(constrrelid, GetUserId(),
285  ACL_TRIGGER);
286  if (aclresult != ACLCHECK_OK)
287  aclcheck_error(aclresult, ACL_KIND_CLASS,
288  get_rel_name(constrrelid));
289  }
290  }
291 
292  /* Compute tgtype */
293  TRIGGER_CLEAR_TYPE(tgtype);
294  if (stmt->row)
295  TRIGGER_SETT_ROW(tgtype);
296  tgtype |= stmt->timing;
297  tgtype |= stmt->events;
298 
299  /* Disallow ROW-level TRUNCATE triggers */
300  if (TRIGGER_FOR_ROW(tgtype) && TRIGGER_FOR_TRUNCATE(tgtype))
301  ereport(ERROR,
302  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
303  errmsg("TRUNCATE FOR EACH ROW triggers are not supported")));
304 
305  /* INSTEAD triggers must be row-level, and can't have WHEN or columns */
306  if (TRIGGER_FOR_INSTEAD(tgtype))
307  {
308  if (!TRIGGER_FOR_ROW(tgtype))
309  ereport(ERROR,
310  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
311  errmsg("INSTEAD OF triggers must be FOR EACH ROW")));
312  if (stmt->whenClause)
313  ereport(ERROR,
314  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
315  errmsg("INSTEAD OF triggers cannot have WHEN conditions")));
316  if (stmt->columns != NIL)
317  ereport(ERROR,
318  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
319  errmsg("INSTEAD OF triggers cannot have column lists")));
320  }
321 
322  /*
323  * We don't yet support naming ROW transition variables, but the parser
324  * recognizes the syntax so we can give a nicer message here.
325  *
326  * Per standard, REFERENCING TABLE names are only allowed on AFTER
327  * triggers. Per standard, REFERENCING ROW names are not allowed with FOR
328  * EACH STATEMENT. Per standard, each OLD/NEW, ROW/TABLE permutation is
329  * only allowed once. Per standard, OLD may not be specified when
330  * creating a trigger only for INSERT, and NEW may not be specified when
331  * creating a trigger only for DELETE.
332  *
333  * Notice that the standard allows an AFTER ... FOR EACH ROW trigger to
334  * reference both ROW and TABLE transition data.
335  */
336  if (stmt->transitionRels != NIL)
337  {
338  List *varList = stmt->transitionRels;
339  ListCell *lc;
340 
341  foreach(lc, varList)
342  {
344 
345  if (!(tt->isTable))
346  ereport(ERROR,
347  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
348  errmsg("ROW variable naming in the REFERENCING clause is not supported"),
349  errhint("Use OLD TABLE or NEW TABLE for naming transition tables.")));
350 
351  /*
352  * Because of the above test, we omit further ROW-related testing
353  * below. If we later allow naming OLD and NEW ROW variables,
354  * adjustments will be needed below.
355  */
356 
357  if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
358  ereport(ERROR,
359  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
360  errmsg("\"%s\" is a partitioned table",
362  errdetail("Triggers on partitioned tables cannot have transition tables.")));
363 
364  if (rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
365  ereport(ERROR,
366  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
367  errmsg("\"%s\" is a foreign table",
369  errdetail("Triggers on foreign tables cannot have transition tables.")));
370 
371  if (rel->rd_rel->relkind == RELKIND_VIEW)
372  ereport(ERROR,
373  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
374  errmsg("\"%s\" is a view",
376  errdetail("Triggers on views cannot have transition tables.")));
377 
378  if (stmt->timing != TRIGGER_TYPE_AFTER)
379  ereport(ERROR,
380  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
381  errmsg("transition table name can only be specified for an AFTER trigger")));
382 
383  if (TRIGGER_FOR_TRUNCATE(tgtype))
384  ereport(ERROR,
385  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
386  errmsg("TRUNCATE triggers with transition tables are not supported")));
387 
388  if (tt->isNew)
389  {
390  if (!(TRIGGER_FOR_INSERT(tgtype) ||
391  TRIGGER_FOR_UPDATE(tgtype)))
392  ereport(ERROR,
393  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
394  errmsg("NEW TABLE can only be specified for an INSERT or UPDATE trigger")));
395 
396  if (newtablename != NULL)
397  ereport(ERROR,
398  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
399  errmsg("NEW TABLE cannot be specified multiple times")));
400 
401  newtablename = tt->name;
402  }
403  else
404  {
405  if (!(TRIGGER_FOR_DELETE(tgtype) ||
406  TRIGGER_FOR_UPDATE(tgtype)))
407  ereport(ERROR,
408  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
409  errmsg("OLD TABLE can only be specified for a DELETE or UPDATE trigger")));
410 
411  if (oldtablename != NULL)
412  ereport(ERROR,
413  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
414  errmsg("OLD TABLE cannot be specified multiple times")));
415 
416  oldtablename = tt->name;
417  }
418  }
419 
420  if (newtablename != NULL && oldtablename != NULL &&
421  strcmp(newtablename, oldtablename) == 0)
422  ereport(ERROR,
423  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
424  errmsg("OLD TABLE name and NEW TABLE name cannot be the same")));
425  }
426 
427  /*
428  * Parse the WHEN clause, if any
429  */
430  if (stmt->whenClause)
431  {
432  ParseState *pstate;
433  RangeTblEntry *rte;
434  List *varList;
435  ListCell *lc;
436 
437  /* Set up a pstate to parse with */
438  pstate = make_parsestate(NULL);
439  pstate->p_sourcetext = queryString;
440 
441  /*
442  * Set up RTEs for OLD and NEW references.
443  *
444  * 'OLD' must always have varno equal to 1 and 'NEW' equal to 2.
445  */
446  rte = addRangeTableEntryForRelation(pstate, rel,
447  makeAlias("old", NIL),
448  false, false);
449  addRTEtoQuery(pstate, rte, false, true, true);
450  rte = addRangeTableEntryForRelation(pstate, rel,
451  makeAlias("new", NIL),
452  false, false);
453  addRTEtoQuery(pstate, rte, false, true, true);
454 
455  /* Transform expression. Copy to be sure we don't modify original */
456  whenClause = transformWhereClause(pstate,
457  copyObject(stmt->whenClause),
459  "WHEN");
460  /* we have to fix its collations too */
461  assign_expr_collations(pstate, whenClause);
462 
463  /*
464  * Check for disallowed references to OLD/NEW.
465  *
466  * NB: pull_var_clause is okay here only because we don't allow
467  * subselects in WHEN clauses; it would fail to examine the contents
468  * of subselects.
469  */
470  varList = pull_var_clause(whenClause, 0);
471  foreach(lc, varList)
472  {
473  Var *var = (Var *) lfirst(lc);
474 
475  switch (var->varno)
476  {
477  case PRS2_OLD_VARNO:
478  if (!TRIGGER_FOR_ROW(tgtype))
479  ereport(ERROR,
480  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
481  errmsg("statement trigger's WHEN condition cannot reference column values"),
482  parser_errposition(pstate, var->location)));
483  if (TRIGGER_FOR_INSERT(tgtype))
484  ereport(ERROR,
485  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
486  errmsg("INSERT trigger's WHEN condition cannot reference OLD values"),
487  parser_errposition(pstate, var->location)));
488  /* system columns are okay here */
489  break;
490  case PRS2_NEW_VARNO:
491  if (!TRIGGER_FOR_ROW(tgtype))
492  ereport(ERROR,
493  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
494  errmsg("statement trigger's WHEN condition cannot reference column values"),
495  parser_errposition(pstate, var->location)));
496  if (TRIGGER_FOR_DELETE(tgtype))
497  ereport(ERROR,
498  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
499  errmsg("DELETE trigger's WHEN condition cannot reference NEW values"),
500  parser_errposition(pstate, var->location)));
501  if (var->varattno < 0 && TRIGGER_FOR_BEFORE(tgtype))
502  ereport(ERROR,
503  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
504  errmsg("BEFORE trigger's WHEN condition cannot reference NEW system columns"),
505  parser_errposition(pstate, var->location)));
506  break;
507  default:
508  /* can't happen without add_missing_from, so just elog */
509  elog(ERROR, "trigger WHEN condition cannot contain references to other relations");
510  break;
511  }
512  }
513 
514  /* we'll need the rtable for recordDependencyOnExpr */
515  whenRtable = pstate->p_rtable;
516 
517  qual = nodeToString(whenClause);
518 
519  free_parsestate(pstate);
520  }
521  else
522  {
523  whenClause = NULL;
524  whenRtable = NIL;
525  qual = NULL;
526  }
527 
528  /*
529  * Find and validate the trigger function.
530  */
531  funcoid = LookupFuncName(stmt->funcname, 0, fargtypes, false);
532  if (!isInternal)
533  {
534  aclresult = pg_proc_aclcheck(funcoid, GetUserId(), ACL_EXECUTE);
535  if (aclresult != ACLCHECK_OK)
536  aclcheck_error(aclresult, ACL_KIND_PROC,
537  NameListToString(stmt->funcname));
538  }
539  funcrettype = get_func_rettype(funcoid);
540  if (funcrettype != TRIGGEROID)
541  {
542  /*
543  * We allow OPAQUE just so we can load old dump files. When we see a
544  * trigger function declared OPAQUE, change it to TRIGGER.
545  */
546  if (funcrettype == OPAQUEOID)
547  {
549  (errmsg("changing return type of function %s from %s to %s",
550  NameListToString(stmt->funcname),
551  "opaque", "trigger")));
553  }
554  else
555  ereport(ERROR,
556  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
557  errmsg("function %s must return type %s",
558  NameListToString(stmt->funcname), "trigger")));
559  }
560 
561  /*
562  * If the command is a user-entered CREATE CONSTRAINT TRIGGER command that
563  * references one of the built-in RI_FKey trigger functions, assume it is
564  * from a dump of a pre-7.3 foreign key constraint, and take steps to
565  * convert this legacy representation into a regular foreign key
566  * constraint. Ugly, but necessary for loading old dump files.
567  */
568  if (stmt->isconstraint && !isInternal &&
569  list_length(stmt->args) >= 6 &&
570  (list_length(stmt->args) % 2) == 0 &&
572  {
573  /* Keep lock on target rel until end of xact */
574  heap_close(rel, NoLock);
575 
576  ConvertTriggerToFK(stmt, funcoid);
577 
578  return InvalidObjectAddress;
579  }
580 
581  /*
582  * If it's a user-entered CREATE CONSTRAINT TRIGGER command, make a
583  * corresponding pg_constraint entry.
584  */
585  if (stmt->isconstraint && !OidIsValid(constraintOid))
586  {
587  /* Internal callers should have made their own constraints */
588  Assert(!isInternal);
589  constraintOid = CreateConstraintEntry(stmt->trigname,
592  stmt->deferrable,
593  stmt->initdeferred,
594  true,
595  RelationGetRelid(rel),
596  NULL, /* no conkey */
597  0,
598  InvalidOid, /* no domain */
599  InvalidOid, /* no index */
600  InvalidOid, /* no foreign key */
601  NULL,
602  NULL,
603  NULL,
604  NULL,
605  0,
606  ' ',
607  ' ',
608  ' ',
609  NULL, /* no exclusion */
610  NULL, /* no check constraint */
611  NULL,
612  NULL,
613  true, /* islocal */
614  0, /* inhcount */
615  true, /* isnoinherit */
616  isInternal); /* is_internal */
617  }
618 
619  /*
620  * Generate the trigger's OID now, so that we can use it in the name if
621  * needed.
622  */
624 
625  trigoid = GetNewOid(tgrel);
626 
627  /*
628  * If trigger is internally generated, modify the provided trigger name to
629  * ensure uniqueness by appending the trigger OID. (Callers will usually
630  * supply a simple constant trigger name in these cases.)
631  */
632  if (isInternal)
633  {
634  snprintf(internaltrigname, sizeof(internaltrigname),
635  "%s_%u", stmt->trigname, trigoid);
636  trigname = internaltrigname;
637  }
638  else
639  {
640  /* user-defined trigger; use the specified trigger name as-is */
641  trigname = stmt->trigname;
642  }
643 
644  /*
645  * Scan pg_trigger for existing triggers on relation. We do this only to
646  * give a nice error message if there's already a trigger of the same
647  * name. (The unique index on tgrelid/tgname would complain anyway.) We
648  * can skip this for internally generated triggers, since the name
649  * modification above should be sufficient.
650  *
651  * NOTE that this is cool only because we have ShareRowExclusiveLock on
652  * the relation, so the trigger set won't be changing underneath us.
653  */
654  if (!isInternal)
655  {
656  ScanKeyInit(&key,
658  BTEqualStrategyNumber, F_OIDEQ,
660  tgscan = systable_beginscan(tgrel, TriggerRelidNameIndexId, true,
661  NULL, 1, &key);
662  while (HeapTupleIsValid(tuple = systable_getnext(tgscan)))
663  {
664  Form_pg_trigger pg_trigger = (Form_pg_trigger) GETSTRUCT(tuple);
665 
666  if (namestrcmp(&(pg_trigger->tgname), trigname) == 0)
667  ereport(ERROR,
669  errmsg("trigger \"%s\" for relation \"%s\" already exists",
670  trigname, RelationGetRelationName(rel))));
671  }
672  systable_endscan(tgscan);
673  }
674 
675  /*
676  * Build the new pg_trigger tuple.
677  */
678  memset(nulls, false, sizeof(nulls));
679 
682  CStringGetDatum(trigname));
683  values[Anum_pg_trigger_tgfoid - 1] = ObjectIdGetDatum(funcoid);
684  values[Anum_pg_trigger_tgtype - 1] = Int16GetDatum(tgtype);
686  values[Anum_pg_trigger_tgisinternal - 1] = BoolGetDatum(isInternal);
687  values[Anum_pg_trigger_tgconstrrelid - 1] = ObjectIdGetDatum(constrrelid);
688  values[Anum_pg_trigger_tgconstrindid - 1] = ObjectIdGetDatum(indexOid);
689  values[Anum_pg_trigger_tgconstraint - 1] = ObjectIdGetDatum(constraintOid);
692 
693  if (stmt->args)
694  {
695  ListCell *le;
696  char *args;
697  int16 nargs = list_length(stmt->args);
698  int len = 0;
699 
700  foreach(le, stmt->args)
701  {
702  char *ar = strVal(lfirst(le));
703 
704  len += strlen(ar) + 4;
705  for (; *ar; ar++)
706  {
707  if (*ar == '\\')
708  len++;
709  }
710  }
711  args = (char *) palloc(len + 1);
712  args[0] = '\0';
713  foreach(le, stmt->args)
714  {
715  char *s = strVal(lfirst(le));
716  char *d = args + strlen(args);
717 
718  while (*s)
719  {
720  if (*s == '\\')
721  *d++ = '\\';
722  *d++ = *s++;
723  }
724  strcpy(d, "\\000");
725  }
726  values[Anum_pg_trigger_tgnargs - 1] = Int16GetDatum(nargs);
728  CStringGetDatum(args));
729  }
730  else
731  {
732  values[Anum_pg_trigger_tgnargs - 1] = Int16GetDatum(0);
734  CStringGetDatum(""));
735  }
736 
737  /* build column number array if it's a column-specific trigger */
738  ncolumns = list_length(stmt->columns);
739  if (ncolumns == 0)
740  columns = NULL;
741  else
742  {
743  ListCell *cell;
744  int i = 0;
745 
746  columns = (int16 *) palloc(ncolumns * sizeof(int16));
747  foreach(cell, stmt->columns)
748  {
749  char *name = strVal(lfirst(cell));
750  int16 attnum;
751  int j;
752 
753  /* Lookup column name. System columns are not allowed */
754  attnum = attnameAttNum(rel, name, false);
755  if (attnum == InvalidAttrNumber)
756  ereport(ERROR,
757  (errcode(ERRCODE_UNDEFINED_COLUMN),
758  errmsg("column \"%s\" of relation \"%s\" does not exist",
759  name, RelationGetRelationName(rel))));
760 
761  /* Check for duplicates */
762  for (j = i - 1; j >= 0; j--)
763  {
764  if (columns[j] == attnum)
765  ereport(ERROR,
766  (errcode(ERRCODE_DUPLICATE_COLUMN),
767  errmsg("column \"%s\" specified more than once",
768  name)));
769  }
770 
771  columns[i++] = attnum;
772  }
773  }
774  tgattr = buildint2vector(columns, ncolumns);
775  values[Anum_pg_trigger_tgattr - 1] = PointerGetDatum(tgattr);
776 
777  /* set tgqual if trigger has WHEN clause */
778  if (qual)
779  values[Anum_pg_trigger_tgqual - 1] = CStringGetTextDatum(qual);
780  else
781  nulls[Anum_pg_trigger_tgqual - 1] = true;
782 
783  if (oldtablename)
785  CStringGetDatum(oldtablename));
786  else
787  nulls[Anum_pg_trigger_tgoldtable - 1] = true;
788  if (newtablename)
790  CStringGetDatum(newtablename));
791  else
792  nulls[Anum_pg_trigger_tgnewtable - 1] = true;
793 
794  tuple = heap_form_tuple(tgrel->rd_att, values, nulls);
795 
796  /* force tuple to have the desired OID */
797  HeapTupleSetOid(tuple, trigoid);
798 
799  /*
800  * Insert tuple into pg_trigger.
801  */
802  CatalogTupleInsert(tgrel, tuple);
803 
804  heap_freetuple(tuple);
806 
810  if (oldtablename)
812  if (newtablename)
814 
815  /*
816  * Update relation's pg_class entry. Crucial side-effect: other backends
817  * (and this one too!) are sent SI message to make them rebuild relcache
818  * entries.
819  */
821  tuple = SearchSysCacheCopy1(RELOID,
823  if (!HeapTupleIsValid(tuple))
824  elog(ERROR, "cache lookup failed for relation %u",
825  RelationGetRelid(rel));
826 
827  ((Form_pg_class) GETSTRUCT(tuple))->relhastriggers = true;
828 
829  CatalogTupleUpdate(pgrel, &tuple->t_self, tuple);
830 
831  heap_freetuple(tuple);
833 
834  /*
835  * We used to try to update the rel's relcache entry here, but that's
836  * fairly pointless since it will happen as a byproduct of the upcoming
837  * CommandCounterIncrement...
838  */
839 
840  /*
841  * Record dependencies for trigger. Always place a normal dependency on
842  * the function.
843  */
844  myself.classId = TriggerRelationId;
845  myself.objectId = trigoid;
846  myself.objectSubId = 0;
847 
848  referenced.classId = ProcedureRelationId;
849  referenced.objectId = funcoid;
850  referenced.objectSubId = 0;
851  recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
852 
853  if (isInternal && OidIsValid(constraintOid))
854  {
855  /*
856  * Internally-generated trigger for a constraint, so make it an
857  * internal dependency of the constraint. We can skip depending on
858  * the relation(s), as there'll be an indirect dependency via the
859  * constraint.
860  */
861  referenced.classId = ConstraintRelationId;
862  referenced.objectId = constraintOid;
863  referenced.objectSubId = 0;
864  recordDependencyOn(&myself, &referenced, DEPENDENCY_INTERNAL);
865  }
866  else
867  {
868  /*
869  * User CREATE TRIGGER, so place dependencies. We make trigger be
870  * auto-dropped if its relation is dropped or if the FK relation is
871  * dropped. (Auto drop is compatible with our pre-7.3 behavior.)
872  */
873  referenced.classId = RelationRelationId;
874  referenced.objectId = RelationGetRelid(rel);
875  referenced.objectSubId = 0;
876  recordDependencyOn(&myself, &referenced, DEPENDENCY_AUTO);
877  if (OidIsValid(constrrelid))
878  {
879  referenced.classId = RelationRelationId;
880  referenced.objectId = constrrelid;
881  referenced.objectSubId = 0;
882  recordDependencyOn(&myself, &referenced, DEPENDENCY_AUTO);
883  }
884  /* Not possible to have an index dependency in this case */
885  Assert(!OidIsValid(indexOid));
886 
887  /*
888  * If it's a user-specified constraint trigger, make the constraint
889  * internally dependent on the trigger instead of vice versa.
890  */
891  if (OidIsValid(constraintOid))
892  {
893  referenced.classId = ConstraintRelationId;
894  referenced.objectId = constraintOid;
895  referenced.objectSubId = 0;
896  recordDependencyOn(&referenced, &myself, DEPENDENCY_INTERNAL);
897  }
898  }
899 
900  /* If column-specific trigger, add normal dependencies on columns */
901  if (columns != NULL)
902  {
903  int i;
904 
905  referenced.classId = RelationRelationId;
906  referenced.objectId = RelationGetRelid(rel);
907  for (i = 0; i < ncolumns; i++)
908  {
909  referenced.objectSubId = columns[i];
910  recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
911  }
912  }
913 
914  /*
915  * If it has a WHEN clause, add dependencies on objects mentioned in the
916  * expression (eg, functions, as well as any columns used).
917  */
918  if (whenClause != NULL)
919  recordDependencyOnExpr(&myself, whenClause, whenRtable,
921 
922  /* Post creation hook for new trigger */
924  isInternal);
925 
926  /* Keep lock on target rel until end of xact */
927  heap_close(rel, NoLock);
928 
929  return myself;
930 }
signed short int16
Definition: c.h:255
#define NIL
Definition: pg_list.h:69
#define Anum_pg_trigger_tgdeferrable
Definition: pg_trigger.h:88
#define TRIGGER_FOR_DELETE(type)
Definition: pg_trigger.h:135
int RI_FKey_trigger_type(Oid tgfoid)
Definition: ri_triggers.c:3704
Datum namein(PG_FUNCTION_ARGS)
Definition: name.c:46
int errhint(const char *fmt,...)
Definition: elog.c:987
void systable_endscan(SysScanDesc sysscan)
Definition: genam.c:499
#define GETSTRUCT(TUP)
Definition: htup_details.h:656
bool IsSystemRelation(Relation relation)
Definition: catalog.c:62
Oid GetUserId(void)
Definition: miscinit.c:283
#define PointerGetDatum(X)
Definition: postgres.h:562
#define RangeVarGetRelid(relation, lockmode, missing_ok)
Definition: namespace.h:53
#define Anum_pg_trigger_tgconstraint
Definition: pg_trigger.h:87
#define ProcedureRelationId
Definition: pg_proc.h:33
Node * whenClause
Definition: parsenodes.h:2336
#define RelationRelationId
Definition: pg_class.h:29
int2vector * buildint2vector(const int16 *int2s, int n)
Definition: int.c:112
#define Anum_pg_trigger_tgqual
Definition: pg_trigger.h:93
#define TRIGGER_CLEAR_TYPE(type)
Definition: pg_trigger.h:118
#define Int16GetDatum(X)
Definition: postgres.h:457
#define Anum_pg_trigger_tgtype
Definition: pg_trigger.h:82
#define AccessShareLock
Definition: lockdefs.h:36
#define Anum_pg_trigger_tgnargs
Definition: pg_trigger.h:90
Definition: nodes.h:509
#define strVal(v)
Definition: value.h:54
int errcode(int sqlerrcode)
Definition: elog.c:575
int namestrcmp(Name name, const char *str)
Definition: name.c:248
#define TRIGGER_FOR_UPDATE(type)
Definition: pg_trigger.h:136
AttrNumber varattno
Definition: primnodes.h:168
int snprintf(char *str, size_t count, const char *fmt,...) pg_attribute_printf(3
void recordDependencyOn(const ObjectAddress *depender, const ObjectAddress *referenced, DependencyType behavior)
Definition: pg_depend.c:44
List * pull_var_clause(Node *node, int flags)
Definition: var.c:535
HeapTuple heap_form_tuple(TupleDesc tupleDescriptor, Datum *values, bool *isnull)
Definition: heaptuple.c:692
#define heap_close(r, l)
Definition: heapam.h:97
#define DirectFunctionCall1(func, arg1)
Definition: fmgr.h:584
Form_pg_class rd_rel
Definition: rel.h:114
void heap_freetuple(HeapTuple htup)
Definition: heaptuple.c:1372
unsigned int Oid
Definition: postgres_ext.h:31
Definition: primnodes.h:163
#define Anum_pg_trigger_tgisinternal
Definition: pg_trigger.h:84
#define OidIsValid(objectId)
Definition: c.h:538
#define TRIGGER_FIRES_ON_ORIGIN
Definition: trigger.h:109
SysScanDesc systable_beginscan(Relation heapRelation, Oid indexId, bool indexOK, Snapshot snapshot, int nkeys, ScanKey key)
Definition: genam.c:328
Oid get_func_rettype(Oid funcid)
Definition: lsyscache.c:1459
ParseState * make_parsestate(ParseState *parentParseState)
Definition: parse_node.c:44
#define TriggerRelidNameIndexId
Definition: indexing.h:249
#define HeapTupleSetOid(tuple, oid)
Definition: htup_details.h:698
#define NAMEDATALEN
void assign_expr_collations(ParseState *pstate, Node *expr)
Alias * makeAlias(const char *aliasname, List *colnames)
Definition: makefuncs.c:384
RangeVar * constrrel
Definition: parsenodes.h:2343
#define TRIGGER_TYPE_INSTEAD
Definition: pg_trigger.h:104
HeapTuple systable_getnext(SysScanDesc sysscan)
Definition: genam.c:416
#define TRIGGER_FOR_ROW(type)
Definition: pg_trigger.h:130
void pfree(void *pointer)
Definition: mcxt.c:950
#define OPAQUEOID
Definition: pg_type.h:700
#define ObjectIdGetDatum(X)
Definition: postgres.h:513
#define ERROR
Definition: elog.h:43
Oid CatalogTupleInsert(Relation heapRel, HeapTuple tup)
Definition: indexing.c:162
#define TRIGGER_TYPE_AFTER
Definition: pg_trigger.h:112
#define TRIGGEROID
Definition: pg_type.h:692
ItemPointerData t_self
Definition: htup.h:65
Datum byteain(PG_FUNCTION_ARGS)
Definition: varlena.c:255
#define lfirst_node(type, lc)
Definition: pg_list.h:109
#define ACL_TRIGGER
Definition: parsenodes.h:78
int location
Definition: primnodes.h:178
#define NoLock
Definition: lockdefs.h:34
#define TRIGGER_SETT_ROW(type)
Definition: pg_trigger.h:120
void aclcheck_error(AclResult aclerr, AclObjectKind objectkind, const char *objectname)
Definition: aclchk.c:3399
#define RowExclusiveLock
Definition: lockdefs.h:38
int errdetail(const char *fmt,...)
Definition: elog.c:873
#define CStringGetDatum(X)
Definition: postgres.h:584
void recordDependencyOnExpr(const ObjectAddress *depender, Node *expr, List *rtable, DependencyType behavior)
Definition: dependency.c:1351
#define RelationGetRelationName(relation)
Definition: rel.h:437
#define RELKIND_FOREIGN_TABLE
Definition: pg_class.h:167
const char * p_sourcetext
Definition: parse_node.h:168
#define TRIGGER_FOR_BEFORE(type)
Definition: pg_trigger.h:131
static void ConvertTriggerToFK(CreateTrigStmt *stmt, Oid funcoid)
Definition: trigger.c:960
List * transitionRels
Definition: parsenodes.h:2339
#define ereport(elevel, rest)
Definition: elog.h:122
void addRTEtoQuery(ParseState *pstate, RangeTblEntry *rte, bool addToJoinList, bool addToRelNameSpace, bool addToVarNameSpace)
#define PRS2_OLD_VARNO
Definition: primnodes.h:160
#define Anum_pg_trigger_tgrelid
Definition: pg_trigger.h:79
#define WARNING
Definition: elog.h:40
Index varno
Definition: primnodes.h:166
char * NameListToString(List *names)
Definition: namespace.c:3020
#define Anum_pg_trigger_tgnewtable
Definition: pg_trigger.h:95
#define RELKIND_PARTITIONED_TABLE
Definition: pg_class.h:168
Definition: c.h:467
#define Anum_pg_trigger_tgconstrindid
Definition: pg_trigger.h:86
AclResult
Definition: acl.h:170
uintptr_t Datum
Definition: postgres.h:372
#define Anum_pg_trigger_tgenabled
Definition: pg_trigger.h:83
Oid GetNewOid(Relation relation)
Definition: catalog.c:288
Relation heap_open(Oid relationId, LOCKMODE lockmode)
Definition: heapam.c:1284
void SetFunctionReturnType(Oid funcOid, Oid newRetType)
#define TRIGGER_FOR_TRUNCATE(type)
Definition: pg_trigger.h:137
#define InvokeObjectPostCreateHookArg(classId, objectId, subId, is_internal)
Definition: objectaccess.h:147
TupleDesc rd_att
Definition: rel.h:115
#define BoolGetDatum(X)
Definition: postgres.h:408
Relation heap_openrv(const RangeVar *relation, LOCKMODE lockmode)
Definition: heapam.c:1312
bool allowSystemTableMods
Definition: globals.c:111
#define InvalidOid
Definition: postgres_ext.h:36
#define HeapTupleIsValid(tuple)
Definition: htup.h:77
int attnameAttNum(Relation rd, const char *attname, bool sysColOK)
#define NULL
Definition: c.h:229
#define Assert(condition)
Definition: c.h:675
#define lfirst(lc)
Definition: pg_list.h:106
#define Anum_pg_trigger_tgargs
Definition: pg_trigger.h:92
#define ShareRowExclusiveLock
Definition: lockdefs.h:42
#define Anum_pg_trigger_tgconstrrelid
Definition: pg_trigger.h:85
Node * transformWhereClause(ParseState *pstate, Node *clause, ParseExprKind exprKind, const char *constructName)
#define Anum_pg_trigger_tgname
Definition: pg_trigger.h:80
#define TriggerRelationId
Definition: pg_trigger.h:34
#define TRIGGER_FOR_INSERT(type)
Definition: pg_trigger.h:134
void CatalogTupleUpdate(Relation heapRel, ItemPointer otid, HeapTuple tup)
Definition: indexing.c:210
static int list_length(const List *l)
Definition: pg_list.h:89
int parser_errposition(ParseState *pstate, int location)
Definition: parse_node.c:111
FormData_pg_trigger * Form_pg_trigger
Definition: pg_trigger.h:72
RangeTblEntry * addRangeTableEntryForRelation(ParseState *pstate, Relation rel, Alias *alias, bool inh, bool inFromCl)
const char * name
Definition: encode.c:521
#define InvalidAttrNumber
Definition: attnum.h:23
#define CharGetDatum(X)
Definition: postgres.h:422
AclResult pg_class_aclcheck(Oid table_oid, Oid roleid, AclMode mode)
Definition: aclchk.c:4422
#define DatumGetPointer(X)
Definition: postgres.h:555
#define TRIGGER_TYPE_BEFORE
Definition: pg_trigger.h:99
Oid LookupFuncName(List *funcname, int nargs, const Oid *argtypes, bool noError)
Definition: parse_func.c:1910
#define Anum_pg_trigger_tgoldtable
Definition: pg_trigger.h:94
static Datum values[MAXATTR]
Definition: bootstrap.c:163
FormData_pg_class * Form_pg_class
Definition: pg_class.h:95
#define SearchSysCacheCopy1(cacheId, key1)
Definition: syscache.h:165
const ObjectAddress InvalidObjectAddress
void * palloc(Size size)
Definition: mcxt.c:849
int errmsg(const char *fmt,...)
Definition: elog.c:797
#define ACL_EXECUTE
Definition: parsenodes.h:79
#define RELKIND_VIEW
Definition: pg_class.h:164
AclResult pg_proc_aclcheck(Oid proc_oid, Oid roleid, AclMode mode)
Definition: aclchk.c:4446
int i
RangeVar * relation
Definition: parsenodes.h:2327
void ScanKeyInit(ScanKey entry, AttrNumber attributeNumber, StrategyNumber strategy, RegProcedure procedure, Datum argument)
Definition: scankey.c:76
#define CStringGetTextDatum(s)
Definition: builtins.h:91
char * nodeToString(const void *obj)
Definition: outfuncs.c:4221
#define ConstraintRelationId
Definition: pg_constraint.h:29
#define elog
Definition: elog.h:219
#define CONSTRAINT_TRIGGER
#define copyObject(obj)
Definition: nodes.h:621
void LockRelationOid(Oid relid, LOCKMODE lockmode)
Definition: lmgr.c:105
void free_parsestate(ParseState *pstate)
Definition: parse_node.c:77
#define RELKIND_RELATION
Definition: pg_class.h:160
#define RI_TRIGGER_NONE
Definition: trigger.h:211
#define ERRCODE_DUPLICATE_OBJECT
Definition: streamutil.c:31
Definition: pg_list.h:45
char * get_rel_name(Oid relid)
Definition: lsyscache.c:1726
#define RelationGetRelid(relation)
Definition: rel.h:417
Oid CreateConstraintEntry(const char *constraintName, Oid constraintNamespace, char constraintType, bool isDeferrable, bool isDeferred, bool isValidated, Oid relId, const int16 *constraintKey, int constraintNKeys, Oid domainId, Oid indexRelId, Oid foreignRelId, const int16 *foreignKey, const Oid *pfEqOp, const Oid *ppEqOp, const Oid *ffEqOp, int foreignNKeys, char foreignUpdateType, char foreignDeleteType, char foreignMatchType, const Oid *exclOp, Node *conExpr, const char *conBin, const char *conSrc, bool conIsLocal, int conInhCount, bool conNoInherit, bool is_internal)
Definition: pg_constraint.c:49
#define PRS2_NEW_VARNO
Definition: primnodes.h:161
#define BTEqualStrategyNumber
Definition: stratnum.h:31
#define Anum_pg_trigger_tgfoid
Definition: pg_trigger.h:81
#define Anum_pg_trigger_tginitdeferred
Definition: pg_trigger.h:89
#define Anum_pg_trigger_tgattr
Definition: pg_trigger.h:91
#define Natts_pg_trigger
Definition: pg_trigger.h:78
#define TRIGGER_FOR_INSTEAD(type)
Definition: pg_trigger.h:133
#define RelationGetNamespace(relation)
Definition: rel.h:444
List * p_rtable
Definition: parse_node.h:169
void EnableDisableTrigger ( Relation  rel,
const char *  tgname,
char  fires_when,
bool  skip_system 
)

Definition at line 1522 of file trigger.c.

References Anum_pg_trigger_tgname, Anum_pg_trigger_tgrelid, BTEqualStrategyNumber, CacheInvalidateRelcache(), CatalogTupleUpdate(), CStringGetDatum, ereport, errcode(), errmsg(), ERROR, GETSTRUCT, heap_close, heap_copytuple(), heap_freetuple(), heap_open(), HeapTupleGetOid, HeapTupleIsValid, InvokeObjectPostAlterHook, NameStr, NULL, ObjectIdGetDatum, RelationGetRelationName, RelationGetRelid, RowExclusiveLock, ScanKeyInit(), superuser(), systable_beginscan(), systable_endscan(), systable_getnext(), HeapTupleData::t_self, TriggerRelationId, and TriggerRelidNameIndexId.

Referenced by ATExecEnableDisableTrigger().

1524 {
1525  Relation tgrel;
1526  int nkeys;
1527  ScanKeyData keys[2];
1528  SysScanDesc tgscan;
1529  HeapTuple tuple;
1530  bool found;
1531  bool changed;
1532 
1533  /* Scan the relevant entries in pg_triggers */
1535 
1536  ScanKeyInit(&keys[0],
1538  BTEqualStrategyNumber, F_OIDEQ,
1540  if (tgname)
1541  {
1542  ScanKeyInit(&keys[1],
1544  BTEqualStrategyNumber, F_NAMEEQ,
1545  CStringGetDatum(tgname));
1546  nkeys = 2;
1547  }
1548  else
1549  nkeys = 1;
1550 
1551  tgscan = systable_beginscan(tgrel, TriggerRelidNameIndexId, true,
1552  NULL, nkeys, keys);
1553 
1554  found = changed = false;
1555 
1556  while (HeapTupleIsValid(tuple = systable_getnext(tgscan)))
1557  {
1558  Form_pg_trigger oldtrig = (Form_pg_trigger) GETSTRUCT(tuple);
1559 
1560  if (oldtrig->tgisinternal)
1561  {
1562  /* system trigger ... ok to process? */
1563  if (skip_system)
1564  continue;
1565  if (!superuser())
1566  ereport(ERROR,
1567  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1568  errmsg("permission denied: \"%s\" is a system trigger",
1569  NameStr(oldtrig->tgname))));
1570  }
1571 
1572  found = true;
1573 
1574  if (oldtrig->tgenabled != fires_when)
1575  {
1576  /* need to change this one ... make a copy to scribble on */
1577  HeapTuple newtup = heap_copytuple(tuple);
1578  Form_pg_trigger newtrig = (Form_pg_trigger) GETSTRUCT(newtup);
1579 
1580  newtrig->tgenabled = fires_when;
1581 
1582  CatalogTupleUpdate(tgrel, &newtup->t_self, newtup);
1583 
1584  heap_freetuple(newtup);
1585 
1586  changed = true;
1587  }
1588 
1590  HeapTupleGetOid(tuple), 0);
1591  }
1592 
1593  systable_endscan(tgscan);
1594 
1595  heap_close(tgrel, RowExclusiveLock);
1596 
1597  if (tgname && !found)
1598  ereport(ERROR,
1599  (errcode(ERRCODE_UNDEFINED_OBJECT),
1600  errmsg("trigger \"%s\" for table \"%s\" does not exist",
1601  tgname, RelationGetRelationName(rel))));
1602 
1603  /*
1604  * If we changed anything, broadcast a SI inval message to force each
1605  * backend (including our own!) to rebuild relation's relcache entry.
1606  * Otherwise they will fail to apply the change promptly.
1607  */
1608  if (changed)
1610 }
HeapTuple heap_copytuple(HeapTuple tuple)
Definition: heaptuple.c:608
void systable_endscan(SysScanDesc sysscan)
Definition: genam.c:499
#define GETSTRUCT(TUP)
Definition: htup_details.h:656
int errcode(int sqlerrcode)
Definition: elog.c:575
bool superuser(void)
Definition: superuser.c:47
#define heap_close(r, l)
Definition: heapam.h:97
void heap_freetuple(HeapTuple htup)
Definition: heaptuple.c:1372
SysScanDesc systable_beginscan(Relation heapRelation, Oid indexId, bool indexOK, Snapshot snapshot, int nkeys, ScanKey key)
Definition: genam.c:328
#define TriggerRelidNameIndexId
Definition: indexing.h:249
HeapTuple systable_getnext(SysScanDesc sysscan)
Definition: genam.c:416
#define ObjectIdGetDatum(X)
Definition: postgres.h:513
#define ERROR
Definition: elog.h:43
ItemPointerData t_self
Definition: htup.h:65
#define RowExclusiveLock
Definition: lockdefs.h:38
#define CStringGetDatum(X)
Definition: postgres.h:584
#define RelationGetRelationName(relation)
Definition: rel.h:437
#define ereport(elevel, rest)
Definition: elog.h:122
#define InvokeObjectPostAlterHook(classId, objectId, subId)
Definition: objectaccess.h:163
#define Anum_pg_trigger_tgrelid
Definition: pg_trigger.h:79
Relation heap_open(Oid relationId, LOCKMODE lockmode)
Definition: heapam.c:1284
#define HeapTupleIsValid(tuple)
Definition: htup.h:77
#define NULL
Definition: c.h:229
#define Anum_pg_trigger_tgname
Definition: pg_trigger.h:80
#define TriggerRelationId
Definition: pg_trigger.h:34
void CatalogTupleUpdate(Relation heapRel, ItemPointer otid, HeapTuple tup)
Definition: indexing.c:210
FormData_pg_trigger * Form_pg_trigger
Definition: pg_trigger.h:72
void CacheInvalidateRelcache(Relation relation)
Definition: inval.c:1233
int errmsg(const char *fmt,...)
Definition: elog.c:797
#define NameStr(name)
Definition: c.h:499
void ScanKeyInit(ScanKey entry, AttrNumber attributeNumber, StrategyNumber strategy, RegProcedure procedure, Datum argument)
Definition: scankey.c:76
#define HeapTupleGetOid(tuple)
Definition: htup_details.h:695
#define RelationGetRelid(relation)
Definition: rel.h:417
#define BTEqualStrategyNumber
Definition: stratnum.h:31
void ExecARDeleteTriggers ( EState estate,
ResultRelInfo relinfo,
ItemPointer  tupleid,
HeapTuple  fdw_trigtuple 
)

Definition at line 2474 of file trigger.c.

References AfterTriggerSaveEvent(), Assert, GetTupleForTrigger(), heap_freetuple(), HeapTupleIsValid, ItemPointerIsValid, LockTupleExclusive, NIL, NULL, ResultRelInfo::ri_TrigDesc, TriggerDesc::trig_delete_after_row, TriggerDesc::trig_delete_old_table, and TRIGGER_EVENT_DELETE.

Referenced by ExecDelete(), and ExecSimpleRelationDelete().

2477 {
2478  TriggerDesc *trigdesc = relinfo->ri_TrigDesc;
2479 
2480  if (trigdesc &&
2481  (trigdesc->trig_delete_after_row || trigdesc->trig_delete_old_table))
2482  {
2483  HeapTuple trigtuple;
2484 
2485  Assert(HeapTupleIsValid(fdw_trigtuple) ^ ItemPointerIsValid(tupleid));
2486  if (fdw_trigtuple == NULL)
2487  trigtuple = GetTupleForTrigger(estate,
2488  NULL,
2489  relinfo,
2490  tupleid,
2492  NULL);
2493  else
2494  trigtuple = fdw_trigtuple;
2495 
2497  true, trigtuple, NULL, NIL, NULL);
2498  if (trigtuple != fdw_trigtuple)
2499  heap_freetuple(trigtuple);
2500  }
2501 }
#define ItemPointerIsValid(pointer)
Definition: itemptr.h:59
#define NIL
Definition: pg_list.h:69
#define TRIGGER_EVENT_DELETE
Definition: trigger.h:53
void heap_freetuple(HeapTuple htup)
Definition: heaptuple.c:1372
bool trig_delete_after_row
Definition: reltrigger.h:66
static void AfterTriggerSaveEvent(EState *estate, ResultRelInfo *relinfo, int event, bool row_trigger, HeapTuple oldtup, HeapTuple newtup, List *recheckIndexes, Bitmapset *modifiedCols)
Definition: trigger.c:5091
TriggerDesc * ri_TrigDesc
Definition: execnodes.h:378
#define HeapTupleIsValid(tuple)
Definition: htup.h:77
#define NULL
Definition: c.h:229
#define Assert(condition)
Definition: c.h:675
static HeapTuple GetTupleForTrigger(EState *estate, EPQState *epqstate, ResultRelInfo *relinfo, ItemPointer tid, LockTupleMode lockmode, TupleTableSlot **newSlot)
Definition: trigger.c:2896
bool trig_delete_old_table
Definition: reltrigger.h:77
void ExecARInsertTriggers ( EState estate,
ResultRelInfo relinfo,
HeapTuple  trigtuple,
List recheckIndexes 
)

Definition at line 2265 of file trigger.c.

References AfterTriggerSaveEvent(), NULL, ResultRelInfo::ri_TrigDesc, TriggerDesc::trig_insert_after_row, TriggerDesc::trig_insert_new_table, and TRIGGER_EVENT_INSERT.

Referenced by CopyFrom(), CopyFromInsertBatch(), ExecInsert(), and ExecSimpleRelationInsert().

2267 {
2268  TriggerDesc *trigdesc = relinfo->ri_TrigDesc;
2269 
2270  if (trigdesc &&
2271  (trigdesc->trig_insert_after_row || trigdesc->trig_insert_new_table))
2273  true, NULL, trigtuple, recheckIndexes, NULL);
2274 }
bool trig_insert_new_table
Definition: reltrigger.h:74
bool trig_insert_after_row
Definition: reltrigger.h:56
static void AfterTriggerSaveEvent(EState *estate, ResultRelInfo *relinfo, int event, bool row_trigger, HeapTuple oldtup, HeapTuple newtup, List *recheckIndexes, Bitmapset *modifiedCols)
Definition: trigger.c:5091
TriggerDesc * ri_TrigDesc
Definition: execnodes.h:378
#define NULL
Definition: c.h:229
#define TRIGGER_EVENT_INSERT
Definition: trigger.h:52
void ExecARUpdateTriggers ( EState estate,
ResultRelInfo relinfo,
ItemPointer  tupleid,
HeapTuple  fdw_trigtuple,
HeapTuple  newtuple,
List recheckIndexes 
)

Definition at line 2734 of file trigger.c.

References AfterTriggerSaveEvent(), Assert, GetTupleForTrigger(), GetUpdatedColumns, heap_freetuple(), HeapTupleIsValid, ItemPointerIsValid, LockTupleExclusive, NULL, ResultRelInfo::ri_TrigDesc, TriggerDesc::trig_update_after_row, TriggerDesc::trig_update_new_table, TriggerDesc::trig_update_old_table, and TRIGGER_EVENT_UPDATE.

Referenced by ExecSimpleRelationUpdate(), and ExecUpdate().

2739 {
2740  TriggerDesc *trigdesc = relinfo->ri_TrigDesc;
2741 
2742  if (trigdesc && (trigdesc->trig_update_after_row ||
2743  trigdesc->trig_update_old_table || trigdesc->trig_update_new_table))
2744  {
2745  HeapTuple trigtuple;
2746 
2747  Assert(HeapTupleIsValid(fdw_trigtuple) ^ ItemPointerIsValid(tupleid));
2748  if (fdw_trigtuple == NULL)
2749  trigtuple = GetTupleForTrigger(estate,
2750  NULL,
2751  relinfo,
2752  tupleid,
2754  NULL);
2755  else
2756  trigtuple = fdw_trigtuple;
2757 
2759  true, trigtuple, newtuple, recheckIndexes,
2760  GetUpdatedColumns(relinfo, estate));
2761  if (trigtuple != fdw_trigtuple)
2762  heap_freetuple(trigtuple);
2763  }
2764 }
#define ItemPointerIsValid(pointer)
Definition: itemptr.h:59
bool trig_update_new_table
Definition: reltrigger.h:76
void heap_freetuple(HeapTuple htup)
Definition: heaptuple.c:1372
bool trig_update_old_table
Definition: reltrigger.h:75
static void AfterTriggerSaveEvent(EState *estate, ResultRelInfo *relinfo, int event, bool row_trigger, HeapTuple oldtup, HeapTuple newtup, List *recheckIndexes, Bitmapset *modifiedCols)
Definition: trigger.c:5091
TriggerDesc * ri_TrigDesc
Definition: execnodes.h:378
bool trig_update_after_row
Definition: reltrigger.h:61
#define GetUpdatedColumns(relinfo, estate)
Definition: trigger.c:75
#define HeapTupleIsValid(tuple)
Definition: htup.h:77
#define NULL
Definition: c.h:229
#define Assert(condition)
Definition: c.h:675
#define TRIGGER_EVENT_UPDATE
Definition: trigger.h:54
static HeapTuple GetTupleForTrigger(EState *estate, EPQState *epqstate, ResultRelInfo *relinfo, ItemPointer tid, LockTupleMode lockmode, TupleTableSlot **newSlot)
Definition: trigger.c:2896
void ExecASDeleteTriggers ( EState estate,
ResultRelInfo relinfo 
)

Definition at line 2395 of file trigger.c.

References AfterTriggerSaveEvent(), NIL, NULL, ResultRelInfo::ri_TrigDesc, TriggerDesc::trig_delete_after_statement, and TRIGGER_EVENT_DELETE.

Referenced by fireASTriggers().

2396 {
2397  TriggerDesc *trigdesc = relinfo->ri_TrigDesc;
2398 
2399  if (trigdesc && trigdesc->trig_delete_after_statement)
2401  false, NULL, NULL, NIL, NULL);
2402 }
#define NIL
Definition: pg_list.h:69
#define TRIGGER_EVENT_DELETE
Definition: trigger.h:53
static void AfterTriggerSaveEvent(EState *estate, ResultRelInfo *relinfo, int event, bool row_trigger, HeapTuple oldtup, HeapTuple newtup, List *recheckIndexes, Bitmapset *modifiedCols)
Definition: trigger.c:5091
TriggerDesc * ri_TrigDesc
Definition: execnodes.h:378
#define NULL
Definition: c.h:229
bool trig_delete_after_statement
Definition: reltrigger.h:69
void ExecASInsertTriggers ( EState estate,
ResultRelInfo relinfo 
)