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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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23
src/backend/nodes/makefuncs.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/makefuncs.c,v 1.39 2003/05/06 00:20:32 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/makefuncs.c,v 1.40 2003/07/01 19:10:52 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -251,3 +251,24 @@ makeTypeName(char *typnam)
n->typmod = -1;
return n;
}
/*
* makeFuncExpr -
* build an expression tree representing a function call.
*
* The argument expressions must have been transformed already.
*/
FuncExpr *
makeFuncExpr(Oid funcid, Oid rettype, List *args, CoercionForm fformat)
{
FuncExpr *funcexpr;
funcexpr = makeNode(FuncExpr);
funcexpr->funcid = funcid;
funcexpr->funcresulttype = rettype;
funcexpr->funcretset = false; /* only allowed case here */
funcexpr->funcformat = fformat;
funcexpr->args = args;
return funcexpr;
}