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Restructure representation of aggregate functions so that they have pg_proc
entries, per pghackers discussion. This fixes aggregates to live in namespaces, and also simplifies/speeds up lookup in parse_func.c. Also, add a 'proimplicit' flag to pg_proc that controls whether a type coercion function may be invoked implicitly, or only explicitly. The current settings of these flags are more permissive than I would like, but we will need to debate and refine the behavior; for now, I avoided breaking regression tests as much as I could.
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@@ -5,7 +5,7 @@
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* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Header: /cvsroot/pgsql/src/backend/nodes/outfuncs.c,v 1.153 2002/04/09 20:35:50 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/nodes/outfuncs.c,v 1.154 2002/04/11 19:59:59 tgl Exp $
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*
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* NOTES
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* Every (plan) node in POSTGRES has an associated "out" routine which
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@@ -785,10 +785,8 @@ _outConst(StringInfo str, Const *node)
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static void
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_outAggref(StringInfo str, Aggref *node)
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{
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appendStringInfo(str, " AGGREG :aggname ");
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_outToken(str, node->aggname);
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appendStringInfo(str, " :basetype %u :aggtype %u :target ",
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node->basetype, node->aggtype);
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appendStringInfo(str, " AGGREG :aggfnoid %u :aggtype %u :target ",
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node->aggfnoid, node->aggtype);
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_outNode(str, node->target);
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appendStringInfo(str, " :aggstar %s :aggdistinct %s ",
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