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Add stratnum GiST support function

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This is support function 12 for the GiST AM and translates
"well-known" RT*StrategyNumber values into whatever strategy number is
used by the opclass (since no particular numbers are actually
required).  We will use this to support temporal PRIMARY
KEY/UNIQUE/FOREIGN KEY/FOR PORTION OF functionality.

This commit adds two implementations, one for internal GiST opclasses
(just an identity function) and another for btree_gist opclasses.  It
updates btree_gist from 1.7 to 1.8, adding the support function for
all its opclasses.

Author: Paul A. Jungwirth <pj@illuminatedcomputing.com>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Reviewed-by: jian he <jian.universality@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CA+renyUApHgSZF9-nd-a0+OPGharLQLO=mDHcY4_qQ0+noCUVg@mail.gmail.com
This commit is contained in:
Peter Eisentraut
2024-01-19 15:41:44 +01:00
parent b725b7eec4
commit 6db4598fcb
17 changed files with 273 additions and 8 deletions
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14
src/backend/access/gist/gistutil.c
View File

@ -23,6 +23,7 @@
#include "storage/indexfsm.h"
#include "storage/lmgr.h"
#include "utils/float.h"
#include "utils/fmgrprotos.h"
#include "utils/lsyscache.h"
#include "utils/snapmgr.h"
#include "utils/syscache.h"
@ -1056,3 +1057,16 @@ gistGetFakeLSN(Relation rel)
return GetFakeLSNForUnloggedRel();
}
}
/*
* Returns the same number that was received.
*
* This is for GiST opclasses that use the RT*StrategyNumber constants.
*/
Datum
gist_stratnum_identity(PG_FUNCTION_ARGS)
{
StrategyNumber strat = PG_GETARG_UINT16(0);
PG_RETURN_UINT16(strat);
}

8
src/backend/access/gist/gistvalidate.c
View File

@ -147,6 +147,10 @@ gistvalidate(Oid opclassoid)
ok = check_amproc_signature(procform->amproc, VOIDOID, true,
1, 1, INTERNALOID);
break;
case GIST_STRATNUM_PROC:
ok = check_amproc_signature(procform->amproc, INT2OID, true,
1, 1, INT2OID);
break;
default:
ereport(INFO,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
@ -267,7 +271,8 @@ gistvalidate(Oid opclassoid)
continue; /* got it */
if (i == GIST_DISTANCE_PROC || i == GIST_FETCH_PROC ||
i == GIST_COMPRESS_PROC || i == GIST_DECOMPRESS_PROC ||
i == GIST_OPTIONS_PROC || i == GIST_SORTSUPPORT_PROC)
i == GIST_OPTIONS_PROC || i == GIST_SORTSUPPORT_PROC ||
i == GIST_STRATNUM_PROC)
continue; /* optional methods */
ereport(INFO,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
@ -339,6 +344,7 @@ gistadjustmembers(Oid opfamilyoid,
case GIST_FETCH_PROC:
case GIST_OPTIONS_PROC:
case GIST_SORTSUPPORT_PROC:
case GIST_STRATNUM_PROC:
/* Optional, so force it to be a soft family dependency */
op->ref_is_hard = false;
op->ref_is_family = true;