Datum
currtid_byrelname(PG_FUNCTION_ARGS)
{
text *relname = PG_GETARG_TEXT_P(0);
ItemPointer tid = PG_GETARG_ITEMPOINTER(1);
ItemPointer result;
RangeVar *relrv;
Relation rel;
AclResult aclresult;
Snapshot snapshot;
relrv = makeRangeVarFromNameList(textToQualifiedNameList(relname));
rel = heap_openrv(relrv, AccessShareLock);
aclresult = pg_class_aclcheck(RelationGetRelid(rel), GetUserId(),
ACL_SELECT);
if (aclresult != ACLCHECK_OK)
aclcheck_error(aclresult, ACL_KIND_CLASS,
RelationGetRelationName(rel));
if (rel->rd_rel->relkind == RELKIND_VIEW || rel->rd_rel->relkind == RELKIND_CONTVIEW)
return currtid_for_view(rel, tid);
result = (ItemPointer) palloc(sizeof(ItemPointerData));
ItemPointerCopy(tid, result);
snapshot = RegisterSnapshot(GetLatestSnapshot());
heap_get_latest_tid(rel, snapshot, result);
UnregisterSnapshot(snapshot);
heap_close(rel, AccessShareLock);
PG_RETURN_ITEMPOINTER(result);
}
Datum
currtid_byreloid(PG_FUNCTION_ARGS)
{
Oid reloid = PG_GETARG_OID(0);
ItemPointer tid = PG_GETARG_ITEMPOINTER(1);
ItemPointer result;
Relation rel;
result = (ItemPointer) palloc(sizeof(ItemPointerData));
if (!reloid)
{
*result = Current_last_tid;
PG_RETURN_ITEMPOINTER(result);
}
rel = heap_open(reloid, AccessShareLock);
if (rel->rd_rel->relkind == RELKIND_VIEW)
return currtid_for_view(rel, tid);
ItemPointerCopy(tid, result);
heap_get_latest_tid(rel, SnapshotNow, result);
heap_close(rel, AccessShareLock);
PG_RETURN_ITEMPOINTER(result);
}
Datum
currtid_byreloid(PG_FUNCTION_ARGS)
{
Oid reloid = PG_GETARG_OID(0);
ItemPointer tid = PG_GETARG_ITEMPOINTER(1);
ItemPointer result;
Relation rel;
AclResult aclresult;
result = (ItemPointer) palloc(sizeof(ItemPointerData));
if (!reloid)
{
*result = Current_last_tid;
PG_RETURN_ITEMPOINTER(result);
}
rel = heap_open(reloid, AccessShareLock);
aclresult = pg_class_aclcheck(RelationGetRelid(rel), GetUserId(),
ACL_SELECT);
if (aclresult != ACLCHECK_OK)
aclcheck_error(aclresult, ACL_KIND_CLASS,
RelationGetRelationName(rel));
if (rel->rd_rel->relkind == RELKIND_VIEW)
return currtid_for_view(rel, tid);
ItemPointerCopy(tid, result);
heap_get_latest_tid(rel, SnapshotNow, result);
heap_close(rel, AccessShareLock);
PG_RETURN_ITEMPOINTER(result);
}
Datum
currtid_byrelname(PG_FUNCTION_ARGS)
{
text *relname = PG_GETARG_TEXT_P(0);
ItemPointer tid = PG_GETARG_ITEMPOINTER(1);
ItemPointer result;
RangeVar *relrv;
Relation rel;
AclResult aclresult;
/*
* Immediately inform client that the function is not supported
*/
elog(ERROR, "Function currtid2 is not supported by GPDB");
relrv = makeRangeVarFromNameList(textToQualifiedNameList(relname));
rel = heap_openrv(relrv, AccessShareLock);
aclresult = pg_class_aclcheck(RelationGetRelid(rel), GetUserId(),
ACL_SELECT);
if (aclresult != ACLCHECK_OK)
aclcheck_error(aclresult, ACL_KIND_CLASS,
RelationGetRelationName(rel));
if (rel->rd_rel->relkind == RELKIND_VIEW)
return currtid_for_view(rel, tid);
result = (ItemPointer) palloc(sizeof(ItemPointerData));
ItemPointerCopy(tid, result);
heap_get_latest_tid(rel, SnapshotNow, result);
heap_close(rel, AccessShareLock);
PG_RETURN_ITEMPOINTER(result);
}
Datum
currtid_byrelname(PG_FUNCTION_ARGS)
{
text *relname = PG_GETARG_TEXT_P(0);
ItemPointer tid = PG_GETARG_ITEMPOINTER(1);
ItemPointer result;
RangeVar *relrv;
Relation rel;
relrv = makeRangeVarFromNameList(textToQualifiedNameList(relname,
"currtid_byrelname"));
rel = heap_openrv(relrv, AccessShareLock);
if (rel->rd_rel->relkind == RELKIND_VIEW)
return currtid_for_view(rel, tid);
result = (ItemPointer) palloc(sizeof(ItemPointerData));
ItemPointerCopy(tid, result);
heap_get_latest_tid(rel, SnapshotNow, result);
heap_close(rel, AccessShareLock);
PG_RETURN_ITEMPOINTER(result);
}