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Add operator strategy and comparison-value datatype fields to ScanKey.

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Remove the 'strategy map' code, which was a large amount of mechanism
that no longer had any use except reverse-mapping from procedure OID to
strategy number.  Passing the strategy number to the index AM in the
first place is simpler and faster.
This is a preliminary step in planned support for cross-datatype index
operations.  I'm committing it now since the ScanKeyEntryInitialize()
API change touches quite a lot of files, and I want to commit those
changes before the tree drifts under me.
This commit is contained in:
Tom Lane
2003-11-09 21:30:38 +00:00
parent 723825afeb
commit c1d62bfd00
72 changed files with 950 additions and 2147 deletions
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20
src/backend/utils/cache/lsyscache.c vendored
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/lsyscache.c,v 1.108 2003/10/04 18:22:59 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/cache/lsyscache.c,v 1.109 2003/11/09 21:30:37 tgl Exp $
*
* NOTES
* Eventually, the index information should go through here, too.
@ -53,21 +53,20 @@ op_in_opclass(Oid opno, Oid opclass)
}
/*
* op_requires_recheck
* get_op_opclass_properties
*
* Return t if operator 'opno' requires a recheck when used as a
* member of opclass 'opclass' (ie, this opclass is lossy for this
* operator).
* Get the operator's strategy number and recheck (lossy) flag
* within the specified opclass.
*
* Caller should already have verified that opno is a member of opclass,
* therefore we raise an error if the tuple is not found.
*/
bool
op_requires_recheck(Oid opno, Oid opclass)
void
get_op_opclass_properties(Oid opno, Oid opclass,
int *strategy, bool *recheck)
{
HeapTuple tp;
Form_pg_amop amop_tup;
bool result;
tp = SearchSysCache(AMOPOPID,
ObjectIdGetDatum(opno),
@ -77,10 +76,9 @@ op_requires_recheck(Oid opno, Oid opclass)
elog(ERROR, "operator %u is not a member of opclass %u",
opno, opclass);
amop_tup = (Form_pg_amop) GETSTRUCT(tp);
result = amop_tup->amopreqcheck;
*strategy = amop_tup->amopstrategy;
*recheck = amop_tup->amopreqcheck;
ReleaseSysCache(tp);
return result;
}
/*