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

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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
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13
src/include/access/nbtree.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: nbtree.h,v 1.72 2003/11/09 21:30:37 tgl Exp $
* $Id: nbtree.h,v 1.73 2003/11/12 21:15:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -341,7 +341,7 @@ typedef struct xl_btree_newpage
/*
* Operator strategy numbers for B-tree have been moved to access/skey.h,
* because many places need to use them in ScanKeyEntryInitialize() calls.
* because many places need to use them in ScanKeyInit() calls.
*/
/*
@ -404,12 +404,12 @@ typedef struct BTScanOpaqueData
Buffer btso_mrkbuf;
ItemPointerData curHeapIptr;
ItemPointerData mrkHeapIptr;
/* these fields are set by _bt_orderkeys(), which see for more info: */
/* these fields are set by _bt_preprocess_keys(): */
bool qual_ok; /* false if qual can never be satisfied */
int numberOfKeys; /* number of scan keys */
int numberOfKeys; /* number of preprocessed scan keys */
int numberOfRequiredKeys; /* number of keys that must be
* matched to continue the scan */
ScanKey keyData; /* array of scan keys */
ScanKey keyData; /* array of preprocessed scan keys */
} BTScanOpaqueData;
typedef BTScanOpaqueData *BTScanOpaque;
@ -424,7 +424,6 @@ extern Datum btinsert(PG_FUNCTION_ARGS);
extern Datum btgettuple(PG_FUNCTION_ARGS);
extern Datum btbeginscan(PG_FUNCTION_ARGS);
extern Datum btrescan(PG_FUNCTION_ARGS);
extern void btmovescan(IndexScanDesc scan, Datum v);
extern Datum btendscan(PG_FUNCTION_ARGS);
extern Datum btmarkpos(PG_FUNCTION_ARGS);
extern Datum btrestrpos(PG_FUNCTION_ARGS);
@ -480,7 +479,7 @@ extern ScanKey _bt_mkscankey(Relation rel, IndexTuple itup);
extern ScanKey _bt_mkscankey_nodata(Relation rel);
extern void _bt_freeskey(ScanKey skey);
extern void _bt_freestack(BTStack stack);
extern void _bt_orderkeys(IndexScanDesc scan);
extern void _bt_preprocess_keys(IndexScanDesc scan);
extern bool _bt_checkkeys(IndexScanDesc scan, IndexTuple tuple,
ScanDirection dir, bool *continuescan);
extern BTItem _bt_formitem(IndexTuple itup);