database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-16 06:01:02 +03:00
Code Activity

New HeapTuple structure/interface.

Browse Source
This commit is contained in:
Vadim B. Mikheev
1998-11-27 19:52:36 +00:00
parent 2435c7d501
commit 6beba218d7
65 changed files with 834 additions and 850 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
src/backend/commands/trigger.c
View File

@ -159,7 +159,7 @@ CreateTrigger(CreateTrigStmt *stmt)
values[Anum_pg_trigger_tgrelid - 1] = ObjectIdGetDatum(RelationGetRelid(rel));
values[Anum_pg_trigger_tgname - 1] = NameGetDatum(namein(stmt->trigname));
values[Anum_pg_trigger_tgfoid - 1] = ObjectIdGetDatum(tuple->t_oid);
values[Anum_pg_trigger_tgfoid - 1] = ObjectIdGetDatum(tuple->t_data->t_oid);
values[Anum_pg_trigger_tgtype - 1] = Int16GetDatum(tgtype);
if (stmt->args)
{
@ -227,7 +227,7 @@ CreateTrigger(CreateTrigStmt *stmt)
pgrel = heap_openr(RelationRelationName);
((Form_pg_class) GETSTRUCT(tuple))->reltriggers = found + 1;
RelationInvalidateHeapTuple(pgrel, tuple);
heap_replace(pgrel, &tuple->t_ctid, tuple);
heap_replace(pgrel, &tuple->t_self, tuple);
CatalogOpenIndices(Num_pg_class_indices, Name_pg_class_indices, ridescs);
CatalogIndexInsert(ridescs, Num_pg_class_indices, pgrel, tuple);
CatalogCloseIndices(Num_pg_class_indices, ridescs);
@ -280,7 +280,7 @@ DropTrigger(DropTrigStmt *stmt)
if (namestrcmp(&(pg_trigger->tgname), stmt->trigname) == 0)
{
heap_delete(tgrel, &tuple->t_ctid);
heap_delete(tgrel, &tuple->t_self);
tgfound++;
}
else
@ -306,7 +306,7 @@ DropTrigger(DropTrigStmt *stmt)
pgrel = heap_openr(RelationRelationName);
((Form_pg_class) GETSTRUCT(tuple))->reltriggers = found;
RelationInvalidateHeapTuple(pgrel, tuple);
heap_replace(pgrel, &tuple->t_ctid, tuple);
heap_replace(pgrel, &tuple->t_self, tuple);
CatalogOpenIndices(Num_pg_class_indices, Name_pg_class_indices, ridescs);
CatalogIndexInsert(ridescs, Num_pg_class_indices, pgrel, tuple);
CatalogCloseIndices(Num_pg_class_indices, ridescs);
@ -340,7 +340,7 @@ RelationRemoveTriggers(Relation rel)
tgscan = heap_beginscan(tgrel, 0, SnapshotNow, 1, &key);
while (HeapTupleIsValid(tup = heap_getnext(tgscan, 0)))
heap_delete(tgrel, &tup->t_ctid);
heap_delete(tgrel, &tup->t_self);
heap_endscan(tgscan);
RelationUnsetLockForWrite(tgrel);
@ -359,11 +359,10 @@ RelationBuildTriggers(Relation relation)
Form_pg_trigger pg_trigger;
Relation irel;
ScanKeyData skey;
HeapTuple tuple;
IndexScanDesc sd;
RetrieveIndexResult indexRes;
HeapTupleData tuple;
IndexScanDesc sd;
RetrieveIndexResult indexRes;
Buffer buffer;
ItemPointer iptr;
struct varlena *val;
bool isnull;
int found;
@ -387,16 +386,16 @@ RelationBuildTriggers(Relation relation)
if (!indexRes)
break;
iptr = &indexRes->heap_iptr;
tuple = heap_fetch(tgrel, SnapshotNow, iptr, &buffer);
tuple.t_self = indexRes->heap_iptr;
heap_fetch(tgrel, SnapshotNow, &tuple, &buffer);
pfree(indexRes);
if (!HeapTupleIsValid(tuple))
if (!tuple.t_data)
continue;
if (found == ntrigs)
elog(ERROR, "RelationBuildTriggers: unexpected record found for rel %.*s",
NAMEDATALEN, relation->rd_rel->relname.data);
pg_trigger = (Form_pg_trigger) GETSTRUCT(tuple);
pg_trigger = (Form_pg_trigger) GETSTRUCT(&tuple);
if (triggers == NULL)
triggers = (Trigger *) palloc(sizeof(Trigger));
@ -410,7 +409,7 @@ RelationBuildTriggers(Relation relation)
build->tgtype = pg_trigger->tgtype;
build->tgnargs = pg_trigger->tgnargs;
memcpy(build->tgattr, &(pg_trigger->tgattr), 8 * sizeof(int16));
val = (struct varlena *) fastgetattr(tuple,
val = (struct varlena *) fastgetattr(&tuple,
Anum_pg_trigger_tgargs,
tgrel->rd_att, &isnull);
if (isnull)
@ -421,7 +420,7 @@ RelationBuildTriggers(Relation relation)
char *p;
int i;
val = (struct varlena *) fastgetattr(tuple,
val = (struct varlena *) fastgetattr(&tuple,
Anum_pg_trigger_tgargs,
tgrel->rd_att, &isnull);
if (isnull)
@ -792,10 +791,11 @@ ExecARUpdateTriggers(Relation rel, ItemPointer tupleid, HeapTuple newtuple)
static HeapTuple
GetTupleForTrigger(Relation relation, ItemPointer tid, bool before)
{
ItemId lp;
HeapTuple tuple;
PageHeader dp;
Buffer b;
ItemId lp;
HeapTupleData tuple;
HeapTuple result;
PageHeader dp;
Buffer b;
b = ReadBuffer(relation, ItemPointerGetBlockNumber(tid));
@ -807,28 +807,30 @@ GetTupleForTrigger(Relation relation, ItemPointer tid, bool before)
Assert(ItemIdIsUsed(lp));
tuple = (HeapTuple) PageGetItem((Page) dp, lp);
tuple.t_data = (HeapTupleHeader) PageGetItem((Page) dp, lp);
tuple.t_len = ItemIdGetLength(lp);
tuple.t_self = *tid;
if (before)
{
if (TupleUpdatedByCurXactAndCmd(tuple))
if (TupleUpdatedByCurXactAndCmd(&tuple))
{
elog(NOTICE, "GetTupleForTrigger: Non-functional delete/update");
ReleaseBuffer(b);
return NULL;
}
HeapTupleSatisfies(lp, relation, b, dp,
false, 0, (ScanKey) NULL, tuple);
if (!tuple)
HeapTupleSatisfies(&tuple, relation, b, dp,
false, 0, (ScanKey) NULL);
if (!tuple.t_data)
{
ReleaseBuffer(b);
elog(ERROR, "GetTupleForTrigger: (am)invalid tid");
}
}
tuple = heap_copytuple(tuple);
result = heap_copytuple(&tuple);
ReleaseBuffer(b);
return tuple;
return result;
}