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Phase 2 of read-only-plans project: restructure expression-tree nodes

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so that all executable expression nodes inherit from a common supertype
Expr.  This is somewhat of an exercise in code purity rather than any
real functional advance, but getting rid of the extra Oper or Func node
formerly used in each operator or function call should provide at least
a little space and speed improvement.
initdb forced by changes in stored-rules representation.
This commit is contained in:
Tom Lane
2002-12-12 15:49:42 +00:00
parent debb072886
commit a0bf885f9e
69 changed files with 3390 additions and 3433 deletions
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21
src/backend/parser/parse_target.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.92 2002/11/15 02:50:09 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.93 2002/12/12 15:49:39 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -79,7 +79,7 @@ transformTargetEntry(ParseState *pstate,
colname,
resjunk);
return makeTargetEntry(resnode, expr);
return makeTargetEntry(resnode, (Expr *) expr);
}
@ -225,7 +225,7 @@ updateTargetListEntry(ParseState *pstate,
int attrno,
List *indirection)
{
Oid type_id = exprType(tle->expr); /* type of value provided */
Oid type_id = exprType((Node *) tle->expr); /* type of value provided */
Oid attrtype; /* type of target column */
int32 attrtypmod;
Resdom *resnode = tle->resdom;
@ -277,8 +277,8 @@ updateTargetListEntry(ParseState *pstate,
attrtypmod,
indirection,
pstate->p_is_insert,
tle->expr);
tle->expr = (Node *) aref;
(Node *) tle->expr);
tle->expr = (Expr *) aref;
}
else
{
@ -289,10 +289,11 @@ updateTargetListEntry(ParseState *pstate,
*/
if (type_id != InvalidOid)
{
tle->expr = coerce_to_target_type(tle->expr, type_id,
attrtype, attrtypmod,
COERCION_ASSIGNMENT,
COERCE_IMPLICIT_CAST);
tle->expr = (Expr *)
coerce_to_target_type((Node *) tle->expr, type_id,
attrtype, attrtypmod,
COERCION_ASSIGNMENT,
COERCE_IMPLICIT_CAST);
if (tle->expr == NULL)
elog(ERROR, "column \"%s\" is of type %s"
" but expression is of type %s"
@ -501,7 +502,7 @@ FigureColnameInternal(Node *node, char **name)
}
break;
case T_CaseExpr:
strength = FigureColnameInternal(((CaseExpr *) node)->defresult,
strength = FigureColnameInternal((Node *) ((CaseExpr *) node)->defresult,
name);
if (strength <= 1)
{