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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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25
src/backend/parser/parse_clause.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_clause.c,v 1.100 2002/11/29 21:39:11 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_clause.c,v 1.101 2002/12/12 15:49:38 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -502,17 +502,6 @@ transformRangeFunction(ParseState *pstate, RangeFunction *r)
elog(ERROR, "cannot use aggregate function in FROM function expression");
}
/*
* Insist we have a bare function call (explain.c is the only place
* that depends on this, I think). If this fails, it's probably
* because transformExpr interpreted the function notation as a type
* coercion.
*/
if (!funcexpr ||
!IsA(funcexpr, Expr) ||
((Expr *) funcexpr)->opType != FUNC_EXPR)
elog(ERROR, "Coercion function not allowed in FROM clause");
/*
* OK, build an RTE for the function.
*/
@ -876,7 +865,7 @@ buildMergedJoinVar(JoinType jointype, Var *l_colvar, Var *r_colvar)
outcoltype,
COERCION_IMPLICIT, COERCE_IMPLICIT_CAST);
else if (l_colvar->vartypmod != outcoltypmod)
l_node = (Node *) makeRelabelType((Node *) l_colvar,
l_node = (Node *) makeRelabelType((Expr *) l_colvar,
outcoltype, outcoltypmod,
COERCE_IMPLICIT_CAST);
else
@ -887,7 +876,7 @@ buildMergedJoinVar(JoinType jointype, Var *l_colvar, Var *r_colvar)
outcoltype,
COERCION_IMPLICIT, COERCE_IMPLICIT_CAST);
else if (r_colvar->vartypmod != outcoltypmod)
r_node = (Node *) makeRelabelType((Node *) r_colvar,
r_node = (Node *) makeRelabelType((Expr *) r_colvar,
outcoltype, outcoltypmod,
COERCE_IMPLICIT_CAST);
else
@ -928,13 +917,13 @@ buildMergedJoinVar(JoinType jointype, Var *l_colvar, Var *r_colvar)
CaseWhen *w = makeNode(CaseWhen);
NullTest *n = makeNode(NullTest);
n->arg = l_node;
n->arg = (Expr *) l_node;
n->nulltesttype = IS_NOT_NULL;
w->expr = (Node *) n;
w->result = l_node;
w->expr = (Expr *) n;
w->result = (Expr *) l_node;
c->casetype = outcoltype;
c->args = makeList1(w);
c->defresult = r_node;
c->defresult = (Expr *) r_node;
res_node = (Node *) c;
break;
}