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Support the syntax

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CREATE AGGREGATE aggname (input_type) (parameter_list)
along with the old syntax where the input type was named in the parameter
list.  This fits more naturally with the way that the aggregate is identified
in DROP AGGREGATE and other utility commands; furthermore it has a natural
extension to handle multiple-input aggregates, where the basetype-parameter
method would get ugly.  In fact, this commit fixes the grammar and all the
utility commands to support multiple-input aggregates; but DefineAggregate
rejects it because the executor isn't fixed yet.
I didn't do anything about treating agg(*) as a zero-input aggregate instead
of artificially making it a one-input aggregate, but that should be considered
in combination with supporting multi-input aggregates.
This commit is contained in:
Tom Lane
2006-04-15 17:45:46 +00:00
parent ebd5257d49
commit 3651a3e6fb
17 changed files with 395 additions and 351 deletions
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15
src/include/commands/defrem.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/commands/defrem.h,v 1.71 2006/03/05 15:58:55 momjian Exp $
* $PostgreSQL: pgsql/src/include/commands/defrem.h,v 1.72 2006/04/15 17:45:41 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -57,22 +57,23 @@ extern void AlterFunction(AlterFunctionStmt *stmt);
extern void CreateCast(CreateCastStmt *stmt);
extern void DropCast(DropCastStmt *stmt);
extern void DropCastById(Oid castOid);
extern void AlterFunctionNamespace(List *name, List *argtypes,
extern void AlterFunctionNamespace(List *name, List *argtypes, bool isagg,
const char *newschema);
/* commands/operatorcmds.c */
extern void DefineOperator(List *names, List *parameters);
extern void RemoveOperator(RemoveOperStmt *stmt);
extern void RemoveOperator(RemoveFuncStmt *stmt);
extern void RemoveOperatorById(Oid operOid);
extern void AlterOperatorOwner(List *name, TypeName *typeName1,
TypeName *typename2, Oid newOwnerId);
extern void AlterOperatorOwner_oid(Oid operOid, Oid newOwnerId);
/* commands/aggregatecmds.c */
extern void DefineAggregate(List *names, List *parameters);
extern void RemoveAggregate(RemoveAggrStmt *stmt);
extern void RenameAggregate(List *name, TypeName *basetype, const char *newname);
extern void AlterAggregateOwner(List *name, TypeName *basetype, Oid newOwnerId);
extern void DefineAggregate(List *name, List *args, bool oldstyle,
List *parameters);
extern void RemoveAggregate(RemoveFuncStmt *stmt);
extern void RenameAggregate(List *name, List *args, const char *newname);
extern void AlterAggregateOwner(List *name, List *args, Oid newOwnerId);
/* commands/opclasscmds.c */
extern void DefineOpClass(CreateOpClassStmt *stmt);