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logicalrelation.h File Reference
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Data Structures

struct  LogicalRepRelMapEntry
 

Typedefs

typedef struct
LogicalRepRelMapEntry 
LogicalRepRelMapEntry
 

Functions

void logicalrep_relmap_update (LogicalRepRelation *remoterel)
 
LogicalRepRelMapEntrylogicalrep_rel_open (LogicalRepRelId remoteid, LOCKMODE lockmode)
 
void logicalrep_rel_close (LogicalRepRelMapEntry *rel, LOCKMODE lockmode)
 
void logicalrep_typmap_update (LogicalRepTyp *remotetyp)
 
Oid logicalrep_typmap_getid (Oid remoteid)
 

Typedef Documentation

Function Documentation

void logicalrep_rel_close ( LogicalRepRelMapEntry rel,
LOCKMODE  lockmode 
)

Definition at line 374 of file relation.c.

References heap_close, LogicalRepRelMapEntry::localrel, and NULL.

Referenced by apply_handle_delete(), apply_handle_insert(), apply_handle_update(), and copy_table().

375 {
376  heap_close(rel->localrel, lockmode);
377  rel->localrel = NULL;
378 }
#define heap_close(r, l)
Definition: heapam.h:97
#define NULL
Definition: c.h:229
LogicalRepRelMapEntry* logicalrep_rel_open ( LogicalRepRelId  remoteid,
LOCKMODE  lockmode 
)

Definition at line 231 of file relation.c.

References LogicalRepRelation::attkeys, LogicalRepRelMapEntry::attrmap, AttrNumberGetAttrOffset, AttrNumberIsForUserDefinedAttr, tupleDesc::attrs, bms_is_member(), bms_next_member(), elog, ereport, errcode(), errmsg(), ERROR, FirstLowInvalidHeapAttributeNumber, GetSubscriptionRelState(), HASH_FIND, hash_search(), heap_open(), i, INDEX_ATTR_BITMAP_IDENTITY_KEY, INDEX_ATTR_BITMAP_PRIMARY_KEY, LogicalRepRelMapEntry::localrel, LogicalRepRelMapEntry::localreloid, logicalrep_rel_att_by_name(), logicalrep_relmap_init(), makeRangeVar(), MemoryContextSwitchTo(), MySubscription, NameStr, tupleDesc::natts, NoLock, LogicalRepRelation::nspname, NULL, Subscription::oid, OidIsValid, palloc(), RangeVarGetRelid, RelationData::rd_rel, RelationGetDescr, RelationGetIndexAttrBitmap(), RELKIND_RELATION, LogicalRepRelation::relname, LogicalRepRelMapEntry::remoterel, REPLICA_IDENTITY_FULL, LogicalRepRelation::replident, LogicalRepRelMapEntry::state, LogicalRepRelMapEntry::statelsn, SUBREL_STATE_READY, and LogicalRepRelMapEntry::updatable.

Referenced by apply_handle_delete(), apply_handle_insert(), apply_handle_update(), and copy_table().

232 {
233  LogicalRepRelMapEntry *entry;
234  bool found;
235 
236  if (LogicalRepRelMap == NULL)
238 
239  /* Search for existing entry. */
240  entry = hash_search(LogicalRepRelMap, (void *) &remoteid,
241  HASH_FIND, &found);
242 
243  if (!found)
244  elog(ERROR, "no relation map entry for remote relation ID %u",
245  remoteid);
246 
247  /* Need to update the local cache? */
248  if (!OidIsValid(entry->localreloid))
249  {
250  Oid relid;
251  int i;
252  int found;
253  Bitmapset *idkey;
254  TupleDesc desc;
255  LogicalRepRelation *remoterel;
256  MemoryContext oldctx;
257  remoterel = &entry->remoterel;
258 
259  /* Try to find and lock the relation by name. */
260  relid = RangeVarGetRelid(makeRangeVar(remoterel->nspname,
261  remoterel->relname, -1),
262  lockmode, true);
263  if (!OidIsValid(relid))
264  ereport(ERROR,
265  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
266  errmsg("logical replication target relation \"%s.%s\" does not exist",
267  remoterel->nspname, remoterel->relname)));
268  entry->localrel = heap_open(relid, NoLock);
269 
270  /*
271  * We currently only support writing to regular and partitioned
272  * tables.
273  */
274  if (entry->localrel->rd_rel->relkind != RELKIND_RELATION)
275  ereport(ERROR,
276  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
277  errmsg("logical replication target relation \"%s.%s\" is not a table",
278  remoterel->nspname, remoterel->relname)));
279 
280  /*
281  * Build the mapping of local attribute numbers to remote attribute
282  * numbers and validate that we don't miss any replicated columns
283  * as that would result in potentially unwanted data loss.
284  */
285  desc = RelationGetDescr(entry->localrel);
287  entry->attrmap = palloc(desc->natts * sizeof(int));
288  MemoryContextSwitchTo(oldctx);
289 
290  found = 0;
291  for (i = 0; i < desc->natts; i++)
292  {
293  int attnum = logicalrep_rel_att_by_name(remoterel,
294  NameStr(desc->attrs[i]->attname));
295  entry->attrmap[i] = attnum;
296  if (attnum >= 0)
297  found++;
298  }
299 
300  /* TODO, detail message with names of missing columns */
301  if (found < remoterel->natts)
302  ereport(ERROR,
303  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
304  errmsg("logical replication target relation \"%s.%s\" is missing "
305  "some replicated columns",
306  remoterel->nspname, remoterel->relname)));
307 
308  /*
309  * Check that replica identity matches. We allow for stricter replica
310  * identity (fewer columns) on subscriber as that will not stop us
311  * from finding unique tuple. IE, if publisher has identity
312  * (id,timestamp) and subscriber just (id) this will not be a problem,
313  * but in the opposite scenario it will.
314  *
315  * Don't throw any error here just mark the relation entry as not
316  * updatable, as replica identity is only for updates and deletes
317  * but inserts can be replicated even without it.
318  */
319  entry->updatable = true;
320  idkey = RelationGetIndexAttrBitmap(entry->localrel,
322  /* fallback to PK if no replica identity */
323  if (idkey == NULL)
324  {
325  idkey = RelationGetIndexAttrBitmap(entry->localrel,
327  /*
328  * If no replica identity index and no PK, the published table
329  * must have replica identity FULL.
330  */
331  if (idkey == NULL && remoterel->replident != REPLICA_IDENTITY_FULL)
332  entry->updatable = false;
333  }
334 
335  i = -1;
336  while ((i = bms_next_member(idkey, i)) >= 0)
337  {
338  int attnum = i + FirstLowInvalidHeapAttributeNumber;
339 
340  if (!AttrNumberIsForUserDefinedAttr(attnum))
341  ereport(ERROR,
342  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
343  errmsg("logical replication target relation \"%s.%s\" uses "
344  "system columns in REPLICA IDENTITY index",
345  remoterel->nspname, remoterel->relname)));
346 
347  attnum = AttrNumberGetAttrOffset(attnum);
348 
349  if (!bms_is_member(entry->attrmap[attnum], remoterel->attkeys))
350  {
351  entry->updatable = false;
352  break;
353  }
354  }
355 
356  entry->localreloid = relid;
357  }
358  else
359  entry->localrel = heap_open(entry->localreloid, lockmode);
360 
361  if (entry->state != SUBREL_STATE_READY)
363  entry->localreloid,
364  &entry->statelsn,
365  true);
366 
367  return entry;
368 }
Subscription * MySubscription
Definition: worker.c:109
#define RelationGetDescr(relation)
Definition: rel.h:429
#define RangeVarGetRelid(relation, lockmode, missing_ok)
Definition: namespace.h:53
int bms_next_member(const Bitmapset *a, int prevbit)
Definition: bitmapset.c:937
Form_pg_attribute * attrs
Definition: tupdesc.h:74
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
#define AttrNumberIsForUserDefinedAttr(attributeNumber)
Definition: attnum.h:41
int errcode(int sqlerrcode)
Definition: elog.c:575
#define FirstLowInvalidHeapAttributeNumber
Definition: sysattr.h:28
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:885
Form_pg_class rd_rel
Definition: rel.h:114
unsigned int Oid
Definition: postgres_ext.h:31
#define OidIsValid(objectId)
Definition: c.h:538
Bitmapset * attkeys
Definition: logicalproto.h:50
int natts
Definition: tupdesc.h:73
#define REPLICA_IDENTITY_FULL
Definition: pg_class.h:179
#define ERROR
Definition: elog.h:43
static int logicalrep_rel_att_by_name(LogicalRepRelation *remoterel, const char *attname)
Definition: relation.c:211
LogicalRepRelation remoterel
#define AttrNumberGetAttrOffset(attNum)
Definition: attnum.h:51
#define NoLock
Definition: lockdefs.h:34
static MemoryContext LogicalRepRelMapContext
Definition: relation.c:32
#define ereport(elevel, rest)
Definition: elog.h:122
Relation heap_open(Oid relationId, LOCKMODE lockmode)
Definition: heapam.c:1284
#define NULL
Definition: c.h:229
char GetSubscriptionRelState(Oid subid, Oid relid, XLogRecPtr *sublsn, bool missing_ok)
void * palloc(Size size)
Definition: mcxt.c:849
int errmsg(const char *fmt,...)
Definition: elog.c:797
int i
Bitmapset * RelationGetIndexAttrBitmap(Relation relation, IndexAttrBitmapKind attrKind)
Definition: relcache.c:4836
#define NameStr(name)
Definition: c.h:499
#define elog
Definition: elog.h:219
#define RELKIND_RELATION
Definition: pg_class.h:160
bool bms_is_member(int x, const Bitmapset *a)
Definition: bitmapset.c:420
#define SUBREL_STATE_READY
RangeVar * makeRangeVar(char *schemaname, char *relname, int location)
Definition: makefuncs.c:419
static HTAB * LogicalRepRelMap
Definition: relation.c:34
static void logicalrep_relmap_init()
Definition: relation.c:85
void logicalrep_relmap_update ( LogicalRepRelation remoterel)

Definition at line 166 of file relation.c.

References LogicalRepRelation::attkeys, LogicalRepRelation::attnames, LogicalRepRelMapEntry::attrmap, LogicalRepRelation::atttyps, bms_copy(), HASH_ENTER, hash_search(), i, InvalidOid, LogicalRepRelMapEntry::localreloid, logicalrep_relmap_free_entry(), logicalrep_relmap_init(), MemoryContextSwitchTo(), LogicalRepRelation::natts, LogicalRepRelation::nspname, NULL, palloc(), pstrdup(), LogicalRepRelation::relname, LogicalRepRelation::remoteid, LogicalRepRelMapEntry::remoterel, and LogicalRepRelation::replident.

Referenced by apply_handle_relation(), and copy_table().

167 {
168  MemoryContext oldctx;
169  LogicalRepRelMapEntry *entry;
170  bool found;
171  int i;
172 
173  if (LogicalRepRelMap == NULL)
175 
176  /*
177  * HASH_ENTER returns the existing entry if present or creates a new one.
178  */
179  entry = hash_search(LogicalRepRelMap, (void *) &remoterel->remoteid,
180  HASH_ENTER, &found);
181 
182  if (found)
184 
185  /* Make cached copy of the data */
187  entry->remoterel.remoteid = remoterel->remoteid;
188  entry->remoterel.nspname = pstrdup(remoterel->nspname);
189  entry->remoterel.relname = pstrdup(remoterel->relname);
190  entry->remoterel.natts = remoterel->natts;
191  entry->remoterel.attnames = palloc(remoterel->natts * sizeof(char *));
192  entry->remoterel.atttyps = palloc(remoterel->natts * sizeof(Oid));
193  for (i = 0; i < remoterel->natts; i++)
194  {
195  entry->remoterel.attnames[i] = pstrdup(remoterel->attnames[i]);
196  entry->remoterel.atttyps[i] = remoterel->atttyps[i];
197  }
198  entry->remoterel.replident = remoterel->replident;
199  entry->remoterel.attkeys = bms_copy(remoterel->attkeys);
200  entry->attrmap = NULL;
201  entry->localreloid = InvalidOid;
202  MemoryContextSwitchTo(oldctx);
203 }
static void logicalrep_relmap_free_entry(LogicalRepRelMapEntry *entry)
Definition: relation.c:125
Bitmapset * bms_copy(const Bitmapset *a)
Definition: bitmapset.c:111
char * pstrdup(const char *in)
Definition: mcxt.c:1077
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:885
unsigned int Oid
Definition: postgres_ext.h:31
Bitmapset * attkeys
Definition: logicalproto.h:50
LogicalRepRelId remoteid
Definition: logicalproto.h:43
LogicalRepRelation remoterel
static MemoryContext LogicalRepRelMapContext
Definition: relation.c:32
#define InvalidOid
Definition: postgres_ext.h:36
#define NULL
Definition: c.h:229
void * palloc(Size size)
Definition: mcxt.c:849
int i
static HTAB * LogicalRepRelMap
Definition: relation.c:34
static void logicalrep_relmap_init()
Definition: relation.c:85
Oid logicalrep_typmap_getid ( Oid  remoteid)

Definition at line 448 of file relation.c.

References elog, ereport, errcode(), errhint(), errmsg(), ERROR, FirstNormalObjectId, get_typisdefined(), GetSysCacheOid2, HASH_FIND, hash_search(), InvalidOid, logicalrep_relmap_init(), LookupExplicitNamespace(), LogicalRepTyp::nspname, NULL, ObjectIdGetDatum, OidIsValid, PointerGetDatum, TYPENAMENSP, LogicalRepTyp::typname, and LogicalRepTyp::typoid.

Referenced by slot_store_error_callback().

449 {
450  LogicalRepTyp *entry;
451  bool found;
452  Oid nspoid;
453 
454  /* Internal types are mapped directly. */
455  if (remoteid < FirstNormalObjectId)
456  {
457  if (!get_typisdefined(remoteid))
458  ereport(ERROR,
459  (errmsg("builtin type %u not found", remoteid),
460  errhint("This can be caused by having publisher with "
461  "higher major version than subscriber")));
462  return remoteid;
463  }
464 
465  if (LogicalRepTypMap == NULL)
467 
468  /* Try finding the mapping. */
469  entry = hash_search(LogicalRepTypMap, (void *) &remoteid,
470  HASH_FIND, &found);
471 
472  if (!found)
473  elog(ERROR, "no type map entry for remote type %u",
474  remoteid);
475 
476  /* Found and mapped, return the oid. */
477  if (OidIsValid(entry->typoid))
478  return entry->typoid;
479 
480  /* Otherwise, try to map to local type. */
481  nspoid = LookupExplicitNamespace(entry->nspname, true);
482  if (OidIsValid(nspoid))
484  PointerGetDatum(entry->typname),
485  ObjectIdGetDatum(nspoid));
486  else
487  entry->typoid = InvalidOid;
488 
489  if (!OidIsValid(entry->typoid))
490  ereport(ERROR,
491  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
492  errmsg("data type \"%s.%s\" required for logical replication does not exist",
493  entry->nspname, entry->typname)));
494 
495  return entry->typoid;
496 }
Oid LookupExplicitNamespace(const char *nspname, bool missing_ok)
Definition: namespace.c:2743
int errhint(const char *fmt,...)
Definition: elog.c:987
char * typname
Definition: logicalproto.h:58
#define PointerGetDatum(X)
Definition: postgres.h:562
bool get_typisdefined(Oid typid)
Definition: lsyscache.c:1891
int errcode(int sqlerrcode)
Definition: elog.c:575
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:885
unsigned int Oid
Definition: postgres_ext.h:31
static HTAB * LogicalRepTypMap
Definition: relation.c:35
#define OidIsValid(objectId)
Definition: c.h:538
#define FirstNormalObjectId
Definition: transam.h:94
#define GetSysCacheOid2(cacheId, key1, key2)
Definition: syscache.h:181
#define ObjectIdGetDatum(X)
Definition: postgres.h:513
#define ERROR
Definition: elog.h:43
#define ereport(elevel, rest)
Definition: elog.h:122
#define InvalidOid
Definition: postgres_ext.h:36
#define NULL
Definition: c.h:229
int errmsg(const char *fmt,...)
Definition: elog.c:797
#define elog
Definition: elog.h:219
char * nspname
Definition: logicalproto.h:57
static void logicalrep_relmap_init()
Definition: relation.c:85
void logicalrep_typmap_update ( LogicalRepTyp remotetyp)

Definition at line 417 of file relation.c.

References HASH_ENTER, hash_search(), InvalidOid, logicalrep_relmap_init(), logicalrep_typmap_free_entry(), MemoryContextSwitchTo(), LogicalRepTyp::nspname, NULL, pstrdup(), LogicalRepTyp::remoteid, LogicalRepTyp::typname, and LogicalRepTyp::typoid.

Referenced by apply_handle_type().

418 {
419  MemoryContext oldctx;
420  LogicalRepTyp *entry;
421  bool found;
422 
423  if (LogicalRepTypMap == NULL)
425 
426  /*
427  * HASH_ENTER returns the existing entry if present or creates a new one.
428  */
429  entry = hash_search(LogicalRepTypMap, (void *) &remotetyp->remoteid,
430  HASH_ENTER, &found);
431 
432  if (found)
434 
435  /* Make cached copy of the data */
436  entry->remoteid = remotetyp->remoteid;
438  entry->nspname = pstrdup(remotetyp->nspname);
439  entry->typname = pstrdup(remotetyp->typname);
440  MemoryContextSwitchTo(oldctx);
441  entry->typoid = InvalidOid;
442 }
char * typname
Definition: logicalproto.h:58
char * pstrdup(const char *in)
Definition: mcxt.c:1077
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:885
static HTAB * LogicalRepTypMap
Definition: relation.c:35
static MemoryContext LogicalRepRelMapContext
Definition: relation.c:32
#define InvalidOid
Definition: postgres_ext.h:36
#define NULL
Definition: c.h:229
static void logicalrep_typmap_free_entry(LogicalRepTyp *entry)
Definition: relation.c:405
char * nspname
Definition: logicalproto.h:57
static void logicalrep_relmap_init()
Definition: relation.c:85