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Aggregates can be polymorphic, using polymorphic implementation functions.

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It also works to create a non-polymorphic aggregate from polymorphic
functions, should you want to do that.  Regression test added, docs still
lacking.  By Joe Conway, with some kibitzing from Tom Lane.
This commit is contained in:
Tom Lane
2003-07-01 19:10:53 +00:00
parent 02b5d8e371
commit e3b1b6c0cd
15 changed files with 1300 additions and 83 deletions
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10
src/include/parser/parse_agg.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_agg.h,v 1.26 2003/06/06 15:04:03 tgl Exp $
* $Id: parse_agg.h,v 1.27 2003/07/01 19:10:53 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -19,4 +19,12 @@ extern void transformAggregateCall(ParseState *pstate, Aggref *agg);
extern void parseCheckAggregates(ParseState *pstate, Query *qry);
extern void build_aggregate_fnexprs(Oid agg_input_type,
Oid agg_state_type,
Oid agg_result_type,
Oid transfn_oid,
Oid finalfn_oid,
Expr **transfnexpr,
Expr **finalfnexpr);
#endif /* PARSE_AGG_H */