database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-28 23:42:10 +03:00
Code Activity

Cross-data-type comparisons are now indexable by btrees, pursuant to my

Browse Source 
pghackers proposal of 8-Nov.  All the existing cross-type comparison
operators (int2/int4/int8 and float4/float8) have appropriate support.
The original proposal of storing the right-hand-side datatype as part of
the primary key for pg_amop and pg_amproc got modified a bit in the event;
it is easier to store zero as the 'default' case and only store a nonzero
when the operator is actually cross-type.  Along the way, remove the
long-since-defunct bigbox_ops operator class.
This commit is contained in:
Tom Lane
2003-11-12 21:15:59 +00:00
parent 49f98fa833
commit fa5c8a055a
76 changed files with 2237 additions and 1492 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
src/backend/access/nbtree/nbtree.c
View File

@ -12,7 +12,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtree.c,v 1.106 2003/09/29 23:40:26 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtree.c,v 1.107 2003/11/12 21:15:46 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -397,7 +397,6 @@ btrescan(PG_FUNCTION_ARGS)
so->keyData = (ScanKey) palloc(scan->numberOfKeys * sizeof(ScanKeyData));
else
so->keyData = (ScanKey) NULL;
so->numberOfKeys = scan->numberOfKeys;
scan->opaque = so;
}
@ -423,38 +422,14 @@ btrescan(PG_FUNCTION_ARGS)
* _bt_first. - vadim 05/05/97
*/
if (scankey && scan->numberOfKeys > 0)
{
memmove(scan->keyData,
scankey,
scan->numberOfKeys * sizeof(ScanKeyData));
so->numberOfKeys = scan->numberOfKeys;
memmove(so->keyData,
scankey,
so->numberOfKeys * sizeof(ScanKeyData));
}
so->numberOfKeys = 0; /* until _bt_preprocess_keys sets it */
PG_RETURN_VOID();
}
void
btmovescan(IndexScanDesc scan, Datum v)
{
ItemPointer iptr;
BTScanOpaque so;
so = (BTScanOpaque) scan->opaque;
/* we aren't holding any read locks, but gotta drop the pin */
if (ItemPointerIsValid(iptr = &(scan->currentItemData)))
{
ReleaseBuffer(so->btso_curbuf);
so->btso_curbuf = InvalidBuffer;
ItemPointerSetInvalid(iptr);
}
so->keyData[0].sk_argument = v;
}
/*
* btendscan() -- close down a scan
*/