diff options
Diffstat (limited to 'src/backend/executor/execUtils.c')
| -rw-r--r-- | src/backend/executor/execUtils.c | 81 |
1 files changed, 34 insertions, 47 deletions
diff --git a/src/backend/executor/execUtils.c b/src/backend/executor/execUtils.c index 6ee0d2e26e..72aceb35f0 100644 --- a/src/backend/executor/execUtils.c +++ b/src/backend/executor/execUtils.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/executor/execUtils.c,v 1.74 2001/03/22 03:59:26 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/executor/execUtils.c,v 1.75 2001/03/22 06:16:12 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -336,18 +336,16 @@ ExecFreeProjectionInfo(CommonState *commonstate) { ProjectionInfo *projInfo; - /* ---------------- - * get projection info. if NULL then this node has - * none so we just return. - * ---------------- + /* + * get projection info. if NULL then this node has none so we just + * return. */ projInfo = commonstate->cs_ProjInfo; if (projInfo == NULL) return; - /* ---------------- - * clean up memory used. - * ---------------- + /* + * clean up memory used. */ if (projInfo->pi_tupValue != NULL) pfree(projInfo->pi_tupValue); @@ -365,18 +363,16 @@ ExecFreeExprContext(CommonState *commonstate) { ExprContext *econtext; - /* ---------------- - * get expression context. if NULL then this node has - * none so we just return. - * ---------------- + /* + * get expression context. if NULL then this node has none so we just + * return. */ econtext = commonstate->cs_ExprContext; if (econtext == NULL) return; - /* ---------------- - * clean up memory used. - * ---------------- + /* + * clean up memory used. */ MemoryContextDelete(econtext->ecxt_per_tuple_memory); pfree(econtext); @@ -476,18 +472,16 @@ ExecOpenIndices(ResultRelInfo *resultRelInfo) IsSystemRelationName(RelationGetRelationName(resultRelation))) return; - /* ---------------- - * Get cached list of index OIDs - * ---------------- + /* + * Get cached list of index OIDs */ indexoidlist = RelationGetIndexList(resultRelation); len = length(indexoidlist); if (len == 0) return; - /* ---------------- - * allocate space for result arrays - * ---------------- + /* + * allocate space for result arrays */ relationDescs = (RelationPtr) palloc(len * sizeof(Relation)); indexInfoArray = (IndexInfo **) palloc(len * sizeof(IndexInfo *)); @@ -496,9 +490,8 @@ ExecOpenIndices(ResultRelInfo *resultRelInfo) resultRelInfo->ri_IndexRelationDescs = relationDescs; resultRelInfo->ri_IndexRelationInfo = indexInfoArray; - /* ---------------- - * For each index, open the index relation and save pg_index info. - * ---------------- + /* + * For each index, open the index relation and save pg_index info. */ i = 0; foreach(indexoidscan, indexoidlist) @@ -508,24 +501,23 @@ ExecOpenIndices(ResultRelInfo *resultRelInfo) HeapTuple indexTuple; IndexInfo *ii; - /* ---------------- + /* * Open (and lock, if necessary) the index relation * * Hack for not btree and hash indices: they use relation level - * exclusive locking on update (i.e. - they are not ready for MVCC) - * and so we have to exclusively lock indices here to prevent - * deadlocks if we will scan them - index_beginscan places + * exclusive locking on update (i.e. - they are not ready for + * MVCC) and so we have to exclusively lock indices here to + * prevent deadlocks if we will scan them - index_beginscan places * AccessShareLock, indices update methods don't use locks at all. * We release this lock in ExecCloseIndices. Note, that hashes use * page level locking - i.e. are not deadlock-free - let's them be * on their way -:)) vadim 03-12-1998 * * If there are multiple not-btree-or-hash indices, all backends must - * lock the indices in the same order or we will get deadlocks here - * during concurrent updates. This is now guaranteed by + * lock the indices in the same order or we will get deadlocks + * here during concurrent updates. This is now guaranteed by * RelationGetIndexList(), which promises to return the index list * in OID order. tgl 06-19-2000 - * ---------------- */ indexDesc = index_open(indexOid); @@ -533,9 +525,8 @@ ExecOpenIndices(ResultRelInfo *resultRelInfo) indexDesc->rd_rel->relam != HASH_AM_OID) LockRelation(indexDesc, AccessExclusiveLock); - /* ---------------- - * Get the pg_index tuple for the index - * ---------------- + /* + * Get the pg_index tuple for the index */ indexTuple = SearchSysCache(INDEXRELID, ObjectIdGetDatum(indexOid), @@ -543,9 +534,8 @@ ExecOpenIndices(ResultRelInfo *resultRelInfo) if (!HeapTupleIsValid(indexTuple)) elog(ERROR, "ExecOpenIndices: index %u not found", indexOid); - /* ---------------- - * extract the index key information from the tuple - * ---------------- + /* + * extract the index key information from the tuple */ ii = BuildIndexInfo(indexTuple); @@ -647,9 +637,8 @@ ExecInsertIndexTuples(TupleTableSlot *slot, /* Arrange for econtext's scan tuple to be the tuple under test */ econtext->ecxt_scantuple = slot; - /* ---------------- - * for each index, form and insert the index tuple - * ---------------- + /* + * for each index, form and insert the index tuple */ for (i = 0; i < numIndices; i++) { @@ -669,10 +658,9 @@ ExecInsertIndexTuples(TupleTableSlot *slot, continue; } - /* ---------------- - * FormIndexDatum fills in its datum and null parameters - * with attribute information taken from the given heap tuple. - * ---------------- + /* + * FormIndexDatum fills in its datum and null parameters with + * attribute information taken from the given heap tuple. */ FormIndexDatum(indexInfo, heapTuple, @@ -687,9 +675,8 @@ ExecInsertIndexTuples(TupleTableSlot *slot, &(heapTuple->t_self), /* tid of heap tuple */ heapRelation); - /* ---------------- - * keep track of index inserts for debugging - * ---------------- + /* + * keep track of index inserts for debugging */ IncrIndexInserted(); |