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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2005-03-14 04:41:13 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2005-03-14 04:41:13 +0000 |
| commit | a9b05bdc8330b378cd2df7910ca0beaa500223fa (patch) | |
| tree | 18be88094b6d17df65925023582e84c34bf152db /src/include/access/heapam.h | |
| parent | d1022ce3a1a8b61798028a8fae46e7e458d77cff (diff) | |
| download | postgresql-a9b05bdc8330b378cd2df7910ca0beaa500223fa.tar.gz | |
Avoid O(N^2) overhead in repeated nocachegetattr calls when columns of
a tuple are being accessed via ExecEvalVar and the attcacheoff shortcut
isn't usable (due to nulls and/or varlena columns). To do this, cache
Datums extracted from a tuple in the associated TupleTableSlot.
Also some code cleanup in and around the TupleTable handling.
Atsushi Ogawa with some kibitzing by Tom Lane.
Diffstat (limited to 'src/include/access/heapam.h')
| -rw-r--r-- | src/include/access/heapam.h | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/src/include/access/heapam.h b/src/include/access/heapam.h index 6fa3bbf455..3b73d5ea8a 100644 --- a/src/include/access/heapam.h +++ b/src/include/access/heapam.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/access/heapam.h,v 1.94 2005/01/27 23:24:11 neilc Exp $ + * $PostgreSQL: pgsql/src/include/access/heapam.h,v 1.95 2005/03/14 04:41:13 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -40,9 +40,6 @@ * ---------------- */ -extern Datum nocachegetattr(HeapTuple tup, int attnum, - TupleDesc att, bool *isnull); - #if !defined(DISABLE_COMPLEX_MACRO) #define fastgetattr(tup, attnum, tupleDesc, isnull) \ @@ -115,9 +112,6 @@ extern Datum fastgetattr(HeapTuple tup, int attnum, TupleDesc tupleDesc, ) \ ) -extern Datum heap_getsysattr(HeapTuple tup, int attnum, TupleDesc tupleDesc, - bool *isnull); - /* ---------------- * function prototypes for heap access method @@ -191,6 +185,8 @@ extern void DataFill(char *data, TupleDesc tupleDesc, extern int heap_attisnull(HeapTuple tup, int attnum); extern Datum nocachegetattr(HeapTuple tup, int attnum, TupleDesc att, bool *isnull); +extern Datum heap_getsysattr(HeapTuple tup, int attnum, TupleDesc tupleDesc, + bool *isnull); extern HeapTuple heap_copytuple(HeapTuple tuple); extern void heap_copytuple_with_tuple(HeapTuple src, HeapTuple dest); extern HeapTuple heap_formtuple(TupleDesc tupleDescriptor, |