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Support use of function argument names to identify which actual arguments

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match which function parameters.  The syntax uses AS, for example
	funcname(value AS arg1, anothervalue AS arg2)

Pavel Stehule
This commit is contained in:
Tom Lane
2009-10-08 02:39:25 +00:00
parent 2eda8dfb52
commit 717fa274d1
34 changed files with 1925 additions and 274 deletions
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30
src/backend/nodes/nodeFuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/nodeFuncs.c,v 1.42 2009/07/30 02:45:37 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/nodeFuncs.c,v 1.43 2009/10/08 02:39:21 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -69,6 +69,9 @@ exprType(Node *expr)
case T_FuncExpr:
type = ((FuncExpr *) expr)->funcresulttype;
break;
case T_NamedArgExpr:
type = exprType((Node *) ((NamedArgExpr *) expr)->arg);
break;
case T_OpExpr:
type = ((OpExpr *) expr)->opresulttype;
break;
@ -259,6 +262,8 @@ exprTypmod(Node *expr)
return coercedTypmod;
}
break;
case T_NamedArgExpr:
return exprTypmod((Node *) ((NamedArgExpr *) expr)->arg);
case T_SubLink:
{
SubLink *sublink = (SubLink *) expr;
@ -676,6 +681,15 @@ exprLocation(Node *expr)
exprLocation((Node *) fexpr->args));
}
break;
case T_NamedArgExpr:
{
NamedArgExpr *na = (NamedArgExpr *) expr;
/* consider both argument name and value */
loc = leftmostLoc(na->location,
exprLocation((Node *) na->arg));
}
break;
case T_OpExpr:
case T_DistinctExpr: /* struct-equivalent to OpExpr */
case T_NullIfExpr: /* struct-equivalent to OpExpr */
@ -1117,6 +1131,8 @@ expression_tree_walker(Node *node,
return true;
}
break;
case T_NamedArgExpr:
return walker(((NamedArgExpr *) node)->arg, context);
case T_OpExpr:
{
OpExpr *expr = (OpExpr *) node;
@ -1623,6 +1639,16 @@ expression_tree_mutator(Node *node,
return (Node *) newnode;
}
break;
case T_NamedArgExpr:
{
NamedArgExpr *nexpr = (NamedArgExpr *) node;
NamedArgExpr *newnode;
FLATCOPY(newnode, nexpr, NamedArgExpr);
MUTATE(newnode->arg, nexpr->arg, Expr *);
return (Node *) newnode;
}
break;
case T_OpExpr:
{
OpExpr *expr = (OpExpr *) node;
@ -2382,6 +2408,8 @@ bool
/* function name is deemed uninteresting */
}
break;
case T_NamedArgExpr:
return walker(((NamedArgExpr *) node)->arg, context);
case T_A_Indices:
{
A_Indices *indices = (A_Indices *) node;