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Operators live in namespaces. CREATE/DROP/COMMENT ON OPERATOR take

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qualified operator names directly, for example CREATE OPERATOR myschema.+
( ... ).  To qualify an operator name in an expression you need to write
OPERATOR(myschema.+) (thanks to Peter for suggesting an escape hatch).
I also took advantage of having to reformat pg_operator to fix something
that'd been bugging me for a while: mergejoinable operators should have
explicit links to the associated cross-data-type comparison operators,
rather than hardwiring an assumption that they are named < and >.
This commit is contained in:
Tom Lane
2002-04-16 23:08:12 +00:00
parent 4da51bfd6d
commit 6cef5d2549
39 changed files with 1953 additions and 1803 deletions
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11
src/backend/optimizer/path/indxpath.c
View File

@@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.115 2002/04/05 00:31:26 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.116 2002/04/16 23:08:10 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -21,6 +21,7 @@
#include "access/nbtree.h"
#include "catalog/catname.h"
#include "catalog/pg_amop.h"
#include "catalog/pg_namespace.h"
#include "catalog/pg_operator.h"
#include "executor/executor.h"
#include "nodes/makefuncs.h"
@@ -911,7 +912,8 @@ indexable_operator(Expr *clause, Oid opclass, bool indexkey_on_left)
* operator, but in practice that seems pretty unlikely for
* binary-compatible types.)
*/
new_op = compatible_oper_opid(opname, indexkeytype, indexkeytype, true);
new_op = compatible_oper_opid(makeList1(makeString(opname)),
indexkeytype, indexkeytype, true);
if (OidIsValid(new_op))
{
@@ -2143,14 +2145,15 @@ network_prefix_quals(Var *leftop, Oid expr_op, Datum rightop)
*/
/* See if there is a binary op of the given name for the given datatype */
/* NB: we assume that only built-in system operators are searched for */
static Oid
find_operator(const char *opname, Oid datatype)
{
return GetSysCacheOid(OPERNAME,
return GetSysCacheOid(OPERNAMENSP,
PointerGetDatum(opname),
ObjectIdGetDatum(datatype),
ObjectIdGetDatum(datatype),
CharGetDatum('b'));
ObjectIdGetDatum(PG_CATALOG_NAMESPACE));
}
/*

5
src/backend/optimizer/plan/initsplan.c
View File

@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/initsplan.c,v 1.67 2002/03/12 00:51:45 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/initsplan.c,v 1.68 2002/04/16 23:08:10 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -740,7 +740,8 @@ process_implied_equality(Query *root, Node *item1, Node *item2,
*/
ltype = exprType(item1);
rtype = exprType(item2);
eq_operator = compatible_oper("=", ltype, rtype, true);
eq_operator = compatible_oper(makeList1(makeString("=")),
ltype, rtype, true);
if (!HeapTupleIsValid(eq_operator))
{
/*

10
src/backend/optimizer/plan/subselect.c
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/subselect.c,v 1.50 2001/11/30 19:24:15 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/subselect.c,v 1.51 2002/04/16 23:08:11 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -284,9 +284,9 @@ make_subplan(SubLink *slink)
* Note: we use make_operand in case runtime type conversion
* function calls must be inserted for this operator!
*/
left = make_operand("", lefthand,
left = make_operand(lefthand,
exprType(lefthand), opform->oprleft);
right = make_operand("", (Node *) prm,
right = make_operand((Node *) prm,
prm->paramtype, opform->oprright);
ReleaseSysCache(tup);
@@ -433,9 +433,9 @@ make_subplan(SubLink *slink)
* Note: we use make_operand in case runtime type conversion
* function calls must be inserted for this operator!
*/
left = make_operand("", lefthand,
left = make_operand(lefthand,
exprType(lefthand), opform->oprleft);
right = make_operand("", (Node *) con,
right = make_operand((Node *) con,
con->consttype, opform->oprright);
ReleaseSysCache(tup);