PostgreSQL Source Code  git master
fdwapi.h File Reference
#include "access/parallel.h"
#include "nodes/execnodes.h"
#include "nodes/pathnodes.h"
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Data Structures

struct  FdwRoutine
 

Typedefs

typedef void(* GetForeignRelSize_function) (PlannerInfo *root, RelOptInfo *baserel, Oid foreigntableid)
 
typedef void(* GetForeignPaths_function) (PlannerInfo *root, RelOptInfo *baserel, Oid foreigntableid)
 
typedef ForeignScan *(* GetForeignPlan_function) (PlannerInfo *root, RelOptInfo *baserel, Oid foreigntableid, ForeignPath *best_path, List *tlist, List *scan_clauses, Plan *outer_plan)
 
typedef void(* BeginForeignScan_function) (ForeignScanState *node, int eflags)
 
typedef TupleTableSlot *(* IterateForeignScan_function) (ForeignScanState *node)
 
typedef bool(* RecheckForeignScan_function) (ForeignScanState *node, TupleTableSlot *slot)
 
typedef void(* ReScanForeignScan_function) (ForeignScanState *node)
 
typedef void(* EndForeignScan_function) (ForeignScanState *node)
 
typedef void(* GetForeignJoinPaths_function) (PlannerInfo *root, RelOptInfo *joinrel, RelOptInfo *outerrel, RelOptInfo *innerrel, JoinType jointype, JoinPathExtraData *extra)
 
typedef void(* GetForeignUpperPaths_function) (PlannerInfo *root, UpperRelationKind stage, RelOptInfo *input_rel, RelOptInfo *output_rel, void *extra)
 
typedef void(* AddForeignUpdateTargets_function) (PlannerInfo *root, Index rtindex, RangeTblEntry *target_rte, Relation target_relation)
 
typedef List *(* PlanForeignModify_function) (PlannerInfo *root, ModifyTable *plan, Index resultRelation, int subplan_index)
 
typedef void(* BeginForeignModify_function) (ModifyTableState *mtstate, ResultRelInfo *rinfo, List *fdw_private, int subplan_index, int eflags)
 
typedef TupleTableSlot *(* ExecForeignInsert_function) (EState *estate, ResultRelInfo *rinfo, TupleTableSlot *slot, TupleTableSlot *planSlot)
 
typedef TupleTableSlot **(* ExecForeignBatchInsert_function) (EState *estate, ResultRelInfo *rinfo, TupleTableSlot **slots, TupleTableSlot **planSlots, int *numSlots)
 
typedef int(* GetForeignModifyBatchSize_function) (ResultRelInfo *rinfo)
 
typedef TupleTableSlot *(* ExecForeignUpdate_function) (EState *estate, ResultRelInfo *rinfo, TupleTableSlot *slot, TupleTableSlot *planSlot)
 
typedef TupleTableSlot *(* ExecForeignDelete_function) (EState *estate, ResultRelInfo *rinfo, TupleTableSlot *slot, TupleTableSlot *planSlot)
 
typedef void(* EndForeignModify_function) (EState *estate, ResultRelInfo *rinfo)
 
typedef void(* BeginForeignInsert_function) (ModifyTableState *mtstate, ResultRelInfo *rinfo)
 
typedef void(* EndForeignInsert_function) (EState *estate, ResultRelInfo *rinfo)
 
typedef int(* IsForeignRelUpdatable_function) (Relation rel)
 
typedef bool(* PlanDirectModify_function) (PlannerInfo *root, ModifyTable *plan, Index resultRelation, int subplan_index)
 
typedef void(* BeginDirectModify_function) (ForeignScanState *node, int eflags)
 
typedef TupleTableSlot *(* IterateDirectModify_function) (ForeignScanState *node)
 
typedef void(* EndDirectModify_function) (ForeignScanState *node)
 
typedef RowMarkType(* GetForeignRowMarkType_function) (RangeTblEntry *rte, LockClauseStrength strength)
 
typedef void(* RefetchForeignRow_function) (EState *estate, ExecRowMark *erm, Datum rowid, TupleTableSlot *slot, bool *updated)
 
typedef void(* ExplainForeignScan_function) (ForeignScanState *node, struct ExplainState *es)
 
typedef void(* ExplainForeignModify_function) (ModifyTableState *mtstate, ResultRelInfo *rinfo, List *fdw_private, int subplan_index, struct ExplainState *es)
 
typedef void(* ExplainDirectModify_function) (ForeignScanState *node, struct ExplainState *es)
 
typedef int(* AcquireSampleRowsFunc) (Relation relation, int elevel, HeapTuple *rows, int targrows, double *totalrows, double *totaldeadrows)
 
typedef bool(* AnalyzeForeignTable_function) (Relation relation, AcquireSampleRowsFunc *func, BlockNumber *totalpages)
 
typedef List *(* ImportForeignSchema_function) (ImportForeignSchemaStmt *stmt, Oid serverOid)
 
typedef void(* ExecForeignTruncate_function) (List *rels, DropBehavior behavior, bool restart_seqs)
 
typedef Size(* EstimateDSMForeignScan_function) (ForeignScanState *node, ParallelContext *pcxt)
 
typedef void(* InitializeDSMForeignScan_function) (ForeignScanState *node, ParallelContext *pcxt, void *coordinate)
 
typedef void(* ReInitializeDSMForeignScan_function) (ForeignScanState *node, ParallelContext *pcxt, void *coordinate)
 
typedef void(* InitializeWorkerForeignScan_function) (ForeignScanState *node, shm_toc *toc, void *coordinate)
 
typedef void(* ShutdownForeignScan_function) (ForeignScanState *node)
 
typedef bool(* IsForeignScanParallelSafe_function) (PlannerInfo *root, RelOptInfo *rel, RangeTblEntry *rte)
 
typedef List *(* ReparameterizeForeignPathByChild_function) (PlannerInfo *root, List *fdw_private, RelOptInfo *child_rel)
 
typedef bool(* IsForeignPathAsyncCapable_function) (ForeignPath *path)
 
typedef void(* ForeignAsyncRequest_function) (AsyncRequest *areq)
 
typedef void(* ForeignAsyncConfigureWait_function) (AsyncRequest *areq)
 
typedef void(* ForeignAsyncNotify_function) (AsyncRequest *areq)
 
typedef struct FdwRoutine FdwRoutine
 

Functions

FdwRoutineGetFdwRoutine (Oid fdwhandler)
 
Oid GetForeignServerIdByRelId (Oid relid)
 
FdwRoutineGetFdwRoutineByServerId (Oid serverid)
 
FdwRoutineGetFdwRoutineByRelId (Oid relid)
 
FdwRoutineGetFdwRoutineForRelation (Relation relation, bool makecopy)
 
bool IsImportableForeignTable (const char *tablename, ImportForeignSchemaStmt *stmt)
 
PathGetExistingLocalJoinPath (RelOptInfo *joinrel)
 

Typedef Documentation

◆ AcquireSampleRowsFunc

typedef int(* AcquireSampleRowsFunc) (Relation relation, int elevel, HeapTuple *rows, int targrows, double *totalrows, double *totaldeadrows)

Definition at line 151 of file fdwapi.h.

◆ AddForeignUpdateTargets_function

typedef void(* AddForeignUpdateTargets_function) (PlannerInfo *root, Index rtindex, RangeTblEntry *target_rte, Relation target_relation)

Definition at line 68 of file fdwapi.h.

◆ AnalyzeForeignTable_function

typedef bool(* AnalyzeForeignTable_function) (Relation relation, AcquireSampleRowsFunc *func, BlockNumber *totalpages)

Definition at line 156 of file fdwapi.h.

◆ BeginDirectModify_function

typedef void(* BeginDirectModify_function) (ForeignScanState *node, int eflags)

Definition at line 123 of file fdwapi.h.

◆ BeginForeignInsert_function

typedef void(* BeginForeignInsert_function) (ModifyTableState *mtstate, ResultRelInfo *rinfo)

Definition at line 110 of file fdwapi.h.

◆ BeginForeignModify_function

typedef void(* BeginForeignModify_function) (ModifyTableState *mtstate, ResultRelInfo *rinfo, List *fdw_private, int subplan_index, int eflags)

Definition at line 78 of file fdwapi.h.

◆ BeginForeignScan_function

typedef void(* BeginForeignScan_function) (ForeignScanState *node, int eflags)

Definition at line 43 of file fdwapi.h.

◆ EndDirectModify_function

typedef void(* EndDirectModify_function) (ForeignScanState *node)

Definition at line 128 of file fdwapi.h.

◆ EndForeignInsert_function

typedef void(* EndForeignInsert_function) (EState *estate, ResultRelInfo *rinfo)

Definition at line 113 of file fdwapi.h.

◆ EndForeignModify_function

typedef void(* EndForeignModify_function) (EState *estate, ResultRelInfo *rinfo)

Definition at line 107 of file fdwapi.h.

◆ EndForeignScan_function

typedef void(* EndForeignScan_function) (ForeignScanState *node)

Definition at line 53 of file fdwapi.h.

◆ EstimateDSMForeignScan_function

typedef Size(* EstimateDSMForeignScan_function) (ForeignScanState *node, ParallelContext *pcxt)

Definition at line 167 of file fdwapi.h.

◆ ExecForeignBatchInsert_function

typedef TupleTableSlot**(* ExecForeignBatchInsert_function) (EState *estate, ResultRelInfo *rinfo, TupleTableSlot **slots, TupleTableSlot **planSlots, int *numSlots)

Definition at line 89 of file fdwapi.h.

◆ ExecForeignDelete_function

typedef TupleTableSlot*(* ExecForeignDelete_function) (EState *estate, ResultRelInfo *rinfo, TupleTableSlot *slot, TupleTableSlot *planSlot)

Definition at line 102 of file fdwapi.h.

◆ ExecForeignInsert_function

typedef TupleTableSlot*(* ExecForeignInsert_function) (EState *estate, ResultRelInfo *rinfo, TupleTableSlot *slot, TupleTableSlot *planSlot)

Definition at line 84 of file fdwapi.h.

◆ ExecForeignTruncate_function

typedef void(* ExecForeignTruncate_function) (List *rels, DropBehavior behavior, bool restart_seqs)

Definition at line 163 of file fdwapi.h.

◆ ExecForeignUpdate_function

typedef TupleTableSlot*(* ExecForeignUpdate_function) (EState *estate, ResultRelInfo *rinfo, TupleTableSlot *slot, TupleTableSlot *planSlot)

Definition at line 97 of file fdwapi.h.

◆ ExplainDirectModify_function

typedef void(* ExplainDirectModify_function) (ForeignScanState *node, struct ExplainState *es)

Definition at line 148 of file fdwapi.h.

◆ ExplainForeignModify_function

typedef void(* ExplainForeignModify_function) (ModifyTableState *mtstate, ResultRelInfo *rinfo, List *fdw_private, int subplan_index, struct ExplainState *es)

Definition at line 142 of file fdwapi.h.

◆ ExplainForeignScan_function

typedef void(* ExplainForeignScan_function) (ForeignScanState *node, struct ExplainState *es)

Definition at line 139 of file fdwapi.h.

◆ FdwRoutine

typedef struct FdwRoutine FdwRoutine

◆ ForeignAsyncConfigureWait_function

typedef void(* ForeignAsyncConfigureWait_function) (AsyncRequest *areq)

Definition at line 190 of file fdwapi.h.

◆ ForeignAsyncNotify_function

typedef void(* ForeignAsyncNotify_function) (AsyncRequest *areq)

Definition at line 192 of file fdwapi.h.

◆ ForeignAsyncRequest_function

typedef void(* ForeignAsyncRequest_function) (AsyncRequest *areq)

Definition at line 188 of file fdwapi.h.

◆ GetForeignJoinPaths_function

typedef void(* GetForeignJoinPaths_function) (PlannerInfo *root, RelOptInfo *joinrel, RelOptInfo *outerrel, RelOptInfo *innerrel, JoinType jointype, JoinPathExtraData *extra)

Definition at line 55 of file fdwapi.h.

◆ GetForeignModifyBatchSize_function

typedef int(* GetForeignModifyBatchSize_function) (ResultRelInfo *rinfo)

Definition at line 95 of file fdwapi.h.

◆ GetForeignPaths_function

typedef void(* GetForeignPaths_function) (PlannerInfo *root, RelOptInfo *baserel, Oid foreigntableid)

Definition at line 31 of file fdwapi.h.

◆ GetForeignPlan_function

typedef ForeignScan*(* GetForeignPlan_function) (PlannerInfo *root, RelOptInfo *baserel, Oid foreigntableid, ForeignPath *best_path, List *tlist, List *scan_clauses, Plan *outer_plan)

Definition at line 35 of file fdwapi.h.

◆ GetForeignRelSize_function

typedef void(* GetForeignRelSize_function) (PlannerInfo *root, RelOptInfo *baserel, Oid foreigntableid)

Definition at line 27 of file fdwapi.h.

◆ GetForeignRowMarkType_function

typedef RowMarkType(* GetForeignRowMarkType_function) (RangeTblEntry *rte, LockClauseStrength strength)

Definition at line 130 of file fdwapi.h.

◆ GetForeignUpperPaths_function

typedef void(* GetForeignUpperPaths_function) (PlannerInfo *root, UpperRelationKind stage, RelOptInfo *input_rel, RelOptInfo *output_rel, void *extra)

Definition at line 62 of file fdwapi.h.

◆ ImportForeignSchema_function

typedef List*(* ImportForeignSchema_function) (ImportForeignSchemaStmt *stmt, Oid serverOid)

Definition at line 160 of file fdwapi.h.

◆ InitializeDSMForeignScan_function

typedef void(* InitializeDSMForeignScan_function) (ForeignScanState *node, ParallelContext *pcxt, void *coordinate)

Definition at line 169 of file fdwapi.h.

◆ InitializeWorkerForeignScan_function

typedef void(* InitializeWorkerForeignScan_function) (ForeignScanState *node, shm_toc *toc, void *coordinate)

Definition at line 175 of file fdwapi.h.

◆ IsForeignPathAsyncCapable_function

typedef bool(* IsForeignPathAsyncCapable_function) (ForeignPath *path)

Definition at line 186 of file fdwapi.h.

◆ IsForeignRelUpdatable_function

typedef int(* IsForeignRelUpdatable_function) (Relation rel)

Definition at line 116 of file fdwapi.h.

◆ IsForeignScanParallelSafe_function

typedef bool(* IsForeignScanParallelSafe_function) (PlannerInfo *root, RelOptInfo *rel, RangeTblEntry *rte)

Definition at line 179 of file fdwapi.h.

◆ IterateDirectModify_function

typedef TupleTableSlot*(* IterateDirectModify_function) (ForeignScanState *node)

Definition at line 126 of file fdwapi.h.

◆ IterateForeignScan_function

typedef TupleTableSlot*(* IterateForeignScan_function) (ForeignScanState *node)

Definition at line 46 of file fdwapi.h.

◆ PlanDirectModify_function

typedef bool(* PlanDirectModify_function) (PlannerInfo *root, ModifyTable *plan, Index resultRelation, int subplan_index)

Definition at line 118 of file fdwapi.h.

◆ PlanForeignModify_function

typedef List*(* PlanForeignModify_function) (PlannerInfo *root, ModifyTable *plan, Index resultRelation, int subplan_index)

Definition at line 73 of file fdwapi.h.

◆ RecheckForeignScan_function

typedef bool(* RecheckForeignScan_function) (ForeignScanState *node, TupleTableSlot *slot)

Definition at line 48 of file fdwapi.h.

◆ RefetchForeignRow_function

typedef void(* RefetchForeignRow_function) (EState *estate, ExecRowMark *erm, Datum rowid, TupleTableSlot *slot, bool *updated)

Definition at line 133 of file fdwapi.h.

◆ ReInitializeDSMForeignScan_function

typedef void(* ReInitializeDSMForeignScan_function) (ForeignScanState *node, ParallelContext *pcxt, void *coordinate)

Definition at line 172 of file fdwapi.h.

◆ ReparameterizeForeignPathByChild_function

typedef List*(* ReparameterizeForeignPathByChild_function) (PlannerInfo *root, List *fdw_private, RelOptInfo *child_rel)

Definition at line 182 of file fdwapi.h.

◆ ReScanForeignScan_function

typedef void(* ReScanForeignScan_function) (ForeignScanState *node)

Definition at line 51 of file fdwapi.h.

◆ ShutdownForeignScan_function

typedef void(* ShutdownForeignScan_function) (ForeignScanState *node)

Definition at line 178 of file fdwapi.h.

Function Documentation

◆ GetExistingLocalJoinPath()

Path* GetExistingLocalJoinPath ( RelOptInfo joinrel)

Definition at line 731 of file foreign.c.

732 {
733  ListCell *lc;
734 
735  Assert(IS_JOIN_REL(joinrel));
736 
737  foreach(lc, joinrel->pathlist)
738  {
739  Path *path = (Path *) lfirst(lc);
740  JoinPath *joinpath = NULL;
741 
742  /* Skip parameterized paths. */
743  if (path->param_info != NULL)
744  continue;
745 
746  switch (path->pathtype)
747  {
748  case T_HashJoin:
749  {
750  HashPath *hash_path = makeNode(HashPath);
751 
752  memcpy(hash_path, path, sizeof(HashPath));
753  joinpath = (JoinPath *) hash_path;
754  }
755  break;
756 
757  case T_NestLoop:
758  {
759  NestPath *nest_path = makeNode(NestPath);
760 
761  memcpy(nest_path, path, sizeof(NestPath));
762  joinpath = (JoinPath *) nest_path;
763  }
764  break;
765 
766  case T_MergeJoin:
767  {
768  MergePath *merge_path = makeNode(MergePath);
769 
770  memcpy(merge_path, path, sizeof(MergePath));
771  joinpath = (JoinPath *) merge_path;
772  }
773  break;
774 
775  default:
776 
777  /*
778  * Just skip anything else. We don't know if corresponding
779  * plan would build the output row from whole-row references
780  * of base relations and execute the EPQ checks.
781  */
782  break;
783  }
784 
785  /* This path isn't good for us, check next. */
786  if (!joinpath)
787  continue;
788 
789  /*
790  * If either inner or outer path is a ForeignPath corresponding to a
791  * pushed down join, replace it with the fdw_outerpath, so that we
792  * maintain path for EPQ checks built entirely of local join
793  * strategies.
794  */
795  if (IsA(joinpath->outerjoinpath, ForeignPath))
796  {
797  ForeignPath *foreign_path;
798 
799  foreign_path = (ForeignPath *) joinpath->outerjoinpath;
800  if (IS_JOIN_REL(foreign_path->path.parent))
801  joinpath->outerjoinpath = foreign_path->fdw_outerpath;
802  }
803 
804  if (IsA(joinpath->innerjoinpath, ForeignPath))
805  {
806  ForeignPath *foreign_path;
807 
808  foreign_path = (ForeignPath *) joinpath->innerjoinpath;
809  if (IS_JOIN_REL(foreign_path->path.parent))
810  joinpath->innerjoinpath = foreign_path->fdw_outerpath;
811  }
812 
813  return (Path *) joinpath;
814  }
815  return NULL;
816 }
#define Assert(condition)
Definition: c.h:858
if(TABLE==NULL||TABLE_index==NULL)
Definition: isn.c:77
#define IsA(nodeptr, _type_)
Definition: nodes.h:158
#define makeNode(_type_)
Definition: nodes.h:155
#define IS_JOIN_REL(rel)
Definition: pathnodes.h:834
#define lfirst(lc)
Definition: pg_list.h:172
Path * fdw_outerpath
Definition: pathnodes.h:1859
Path * outerjoinpath
Definition: pathnodes.h:2063
Path * innerjoinpath
Definition: pathnodes.h:2064
NodeTag pathtype
Definition: pathnodes.h:1615
List * pathlist
Definition: pathnodes.h:888

References Assert, ForeignPath::fdw_outerpath, if(), JoinPath::innerjoinpath, IS_JOIN_REL, IsA, lfirst, makeNode, JoinPath::outerjoinpath, ForeignPath::path, RelOptInfo::pathlist, and Path::pathtype.

Referenced by postgresGetForeignJoinPaths().

◆ GetFdwRoutine()

FdwRoutine* GetFdwRoutine ( Oid  fdwhandler)

Definition at line 324 of file foreign.c.

325 {
326  Datum datum;
327  FdwRoutine *routine;
328 
329  datum = OidFunctionCall0(fdwhandler);
330  routine = (FdwRoutine *) DatumGetPointer(datum);
331 
332  if (routine == NULL || !IsA(routine, FdwRoutine))
333  elog(ERROR, "foreign-data wrapper handler function %u did not return an FdwRoutine struct",
334  fdwhandler);
335 
336  return routine;
337 }
#define ERROR
Definition: elog.h:39
#define elog(elevel,...)
Definition: elog.h:224
#define OidFunctionCall0(functionId)
Definition: fmgr.h:678
uintptr_t Datum
Definition: postgres.h:64
static Pointer DatumGetPointer(Datum X)
Definition: postgres.h:312

References DatumGetPointer(), elog, ERROR, IsA, and OidFunctionCall0.

Referenced by GetFdwRoutineByServerId(), and ImportForeignSchema().

◆ GetFdwRoutineByRelId()

FdwRoutine* GetFdwRoutineByRelId ( Oid  relid)

Definition at line 409 of file foreign.c.

410 {
411  Oid serverid;
412 
413  /* Get server OID for the foreign table. */
414  serverid = GetForeignServerIdByRelId(relid);
415 
416  /* Now retrieve server's FdwRoutine struct. */
417  return GetFdwRoutineByServerId(serverid);
418 }
Oid GetForeignServerIdByRelId(Oid relid)
Definition: foreign.c:345
FdwRoutine * GetFdwRoutineByServerId(Oid serverid)
Definition: foreign.c:367
unsigned int Oid
Definition: postgres_ext.h:31

References GetFdwRoutineByServerId(), and GetForeignServerIdByRelId().

Referenced by GetFdwRoutineForRelation(), make_modifytable(), and select_rowmark_type().

◆ GetFdwRoutineByServerId()

FdwRoutine* GetFdwRoutineByServerId ( Oid  serverid)

Definition at line 367 of file foreign.c.

368 {
369  HeapTuple tp;
371  Form_pg_foreign_server serverform;
372  Oid fdwid;
373  Oid fdwhandler;
374 
375  /* Get foreign-data wrapper OID for the server. */
376  tp = SearchSysCache1(FOREIGNSERVEROID, ObjectIdGetDatum(serverid));
377  if (!HeapTupleIsValid(tp))
378  elog(ERROR, "cache lookup failed for foreign server %u", serverid);
379  serverform = (Form_pg_foreign_server) GETSTRUCT(tp);
380  fdwid = serverform->srvfdw;
381  ReleaseSysCache(tp);
382 
383  /* Get handler function OID for the FDW. */
384  tp = SearchSysCache1(FOREIGNDATAWRAPPEROID, ObjectIdGetDatum(fdwid));
385  if (!HeapTupleIsValid(tp))
386  elog(ERROR, "cache lookup failed for foreign-data wrapper %u", fdwid);
387  fdwform = (Form_pg_foreign_data_wrapper) GETSTRUCT(tp);
388  fdwhandler = fdwform->fdwhandler;
389 
390  /* Complain if FDW has been set to NO HANDLER. */
391  if (!OidIsValid(fdwhandler))
392  ereport(ERROR,
393  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
394  errmsg("foreign-data wrapper \"%s\" has no handler",
395  NameStr(fdwform->fdwname))));
396 
397  ReleaseSysCache(tp);
398 
399  /* And finally, call the handler function. */
400  return GetFdwRoutine(fdwhandler);
401 }
#define NameStr(name)
Definition: c.h:746
#define OidIsValid(objectId)
Definition: c.h:775
int errcode(int sqlerrcode)
Definition: elog.c:857
int errmsg(const char *fmt,...)
Definition: elog.c:1070
#define ereport(elevel,...)
Definition: elog.h:149
FdwRoutine * GetFdwRoutine(Oid fdwhandler)
Definition: foreign.c:324
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
#define GETSTRUCT(TUP)
Definition: htup_details.h:653
FormData_pg_foreign_data_wrapper * Form_pg_foreign_data_wrapper
FormData_pg_foreign_server * Form_pg_foreign_server
static Datum ObjectIdGetDatum(Oid X)
Definition: postgres.h:252
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:266
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:218

References elog, ereport, errcode(), errmsg(), ERROR, GetFdwRoutine(), GETSTRUCT, HeapTupleIsValid, NameStr, ObjectIdGetDatum(), OidIsValid, ReleaseSysCache(), and SearchSysCache1().

Referenced by ExecInitForeignScan(), ExecuteTruncateGuts(), GetFdwRoutineByRelId(), and truncate_check_rel().

◆ GetFdwRoutineForRelation()

FdwRoutine* GetFdwRoutineForRelation ( Relation  relation,
bool  makecopy 
)

Definition at line 432 of file foreign.c.

433 {
434  FdwRoutine *fdwroutine;
435  FdwRoutine *cfdwroutine;
436 
437  if (relation->rd_fdwroutine == NULL)
438  {
439  /* Get the info by consulting the catalogs and the FDW code */
440  fdwroutine = GetFdwRoutineByRelId(RelationGetRelid(relation));
441 
442  /* Save the data for later reuse in CacheMemoryContext */
444  sizeof(FdwRoutine));
445  memcpy(cfdwroutine, fdwroutine, sizeof(FdwRoutine));
446  relation->rd_fdwroutine = cfdwroutine;
447 
448  /* Give back the locally palloc'd copy regardless of makecopy */
449  return fdwroutine;
450  }
451 
452  /* We have valid cached data --- does the caller want a copy? */
453  if (makecopy)
454  {
455  fdwroutine = (FdwRoutine *) palloc(sizeof(FdwRoutine));
456  memcpy(fdwroutine, relation->rd_fdwroutine, sizeof(FdwRoutine));
457  return fdwroutine;
458  }
459 
460  /* Only a short-lived reference is needed, so just hand back cached copy */
461  return relation->rd_fdwroutine;
462 }
FdwRoutine * GetFdwRoutineByRelId(Oid relid)
Definition: foreign.c:409
void * MemoryContextAlloc(MemoryContext context, Size size)
Definition: mcxt.c:1180
MemoryContext CacheMemoryContext
Definition: mcxt.c:152
void * palloc(Size size)
Definition: mcxt.c:1316
#define RelationGetRelid(relation)
Definition: rel.h:505
struct FdwRoutine * rd_fdwroutine
Definition: rel.h:240

References CacheMemoryContext, GetFdwRoutineByRelId(), MemoryContextAlloc(), palloc(), RelationData::rd_fdwroutine, and RelationGetRelid.

Referenced by acquire_inherited_sample_rows(), add_row_identity_columns(), analyze_rel(), CheckValidRowMarkRel(), EvalPlanQualFetchRowMark(), ExecInitForeignScan(), ExecLockRows(), get_relation_info(), InitResultRelInfo(), and relation_is_updatable().

◆ GetForeignServerIdByRelId()

Oid GetForeignServerIdByRelId ( Oid  relid)

Definition at line 345 of file foreign.c.

346 {
347  HeapTuple tp;
348  Form_pg_foreign_table tableform;
349  Oid serverid;
350 
351  tp = SearchSysCache1(FOREIGNTABLEREL, ObjectIdGetDatum(relid));
352  if (!HeapTupleIsValid(tp))
353  elog(ERROR, "cache lookup failed for foreign table %u", relid);
354  tableform = (Form_pg_foreign_table) GETSTRUCT(tp);
355  serverid = tableform->ftserver;
356  ReleaseSysCache(tp);
357 
358  return serverid;
359 }
FormData_pg_foreign_table * Form_pg_foreign_table

References elog, ERROR, GETSTRUCT, HeapTupleIsValid, ObjectIdGetDatum(), ReleaseSysCache(), and SearchSysCache1().

Referenced by ExecuteTruncateGuts(), get_relation_info(), GetFdwRoutineByRelId(), and truncate_check_rel().

◆ IsImportableForeignTable()

bool IsImportableForeignTable ( const char *  tablename,
ImportForeignSchemaStmt stmt 
)

Definition at line 472 of file foreign.c.

474 {
475  ListCell *lc;
476 
477  switch (stmt->list_type)
478  {
480  return true;
481 
483  foreach(lc, stmt->table_list)
484  {
485  RangeVar *rv = (RangeVar *) lfirst(lc);
486 
487  if (strcmp(tablename, rv->relname) == 0)
488  return true;
489  }
490  return false;
491 
493  foreach(lc, stmt->table_list)
494  {
495  RangeVar *rv = (RangeVar *) lfirst(lc);
496 
497  if (strcmp(tablename, rv->relname) == 0)
498  return false;
499  }
500  return true;
501  }
502  return false; /* shouldn't get here */
503 }
#define stmt
Definition: indent_codes.h:59
@ FDW_IMPORT_SCHEMA_LIMIT_TO
Definition: parsenodes.h:2945
@ FDW_IMPORT_SCHEMA_ALL
Definition: parsenodes.h:2944
@ FDW_IMPORT_SCHEMA_EXCEPT
Definition: parsenodes.h:2946
char * relname
Definition: primnodes.h:82

References FDW_IMPORT_SCHEMA_ALL, FDW_IMPORT_SCHEMA_EXCEPT, FDW_IMPORT_SCHEMA_LIMIT_TO, lfirst, RangeVar::relname, and stmt.

Referenced by ImportForeignSchema().