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Reorder tests in parse_coerce so that ANY/ANYELEMENT/ANYARRAY coercion 

does not affect UNKNOWN-type literals or Params.  This fixes the recent
complaint about count('x') being broken, and improves consistency in
a few other respects too.
This commit is contained in:
Tom Lane 2003-12-17 19:49:39 +00:00
parent b40b3306fa
commit f758097c6d
1 changed files with 20 additions and 20 deletions
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40
src/backend/parser/parse_coerce.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/parse_coerce.c,v 2.112 2003/11/29 19:51:52 pgsql Exp $
* $PostgreSQL: pgsql/src/backend/parser/parse_coerce.c,v 2.113 2003/12/17 19:49:39 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -153,6 +153,14 @@ coerce_type(ParseState *pstate, Node *node,
/* no conversion needed */
return node;
}
if (targetTypeId == ANYOID ||
targetTypeId == ANYARRAYOID ||
targetTypeId == ANYELEMENTOID)
{
/* assume can_coerce_type verified that implicit coercion is okay */
/* NB: we do NOT want a RelabelType here */
return node;
}
if (inputTypeId == UNKNOWNOID && IsA(node, Const))
{
/*
@ -260,14 +268,6 @@ coerce_type(ParseState *pstate, Node *node,
param->paramtype = targetTypeId;
return (Node *) param;
}
if (targetTypeId == ANYOID ||
targetTypeId == ANYARRAYOID ||
targetTypeId == ANYELEMENTOID)
{
/* assume can_coerce_type verified that implicit coercion is okay */
/* NB: we do NOT want a RelabelType here */
return node;
}
if (find_coercion_pathway(targetTypeId, inputTypeId, ccontext,
&funcId))
{
@ -372,17 +372,6 @@ can_coerce_type(int nargs, Oid *input_typeids, Oid *target_typeids,
if (!typeidIsValid(targetTypeId))
return false;
/*
* If input is an untyped string constant, assume we can convert
* it to anything except a class type.
*/
if (inputTypeId == UNKNOWNOID)
{
if (ISCOMPLEX(targetTypeId))
return false;
continue;
}
/* accept if target is ANY */
if (targetTypeId == ANYOID)
continue;
@ -395,6 +384,17 @@ can_coerce_type(int nargs, Oid *input_typeids, Oid *target_typeids,
continue;
}
/*
* If input is an untyped string constant, assume we can convert
* it to anything except a class type.
*/
if (inputTypeId == UNKNOWNOID)
{
if (ISCOMPLEX(targetTypeId))
return false;
continue;
}
/*
* If pg_cast shows that we can coerce, accept. This test now
* covers both binary-compatible and coercion-function cases.