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Subselects in FROM clause, per ISO syntax: FROM (SELECT ...) [AS] alias.

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(Don't forget that an alias is required.)  Views reimplemented as expanding
to subselect-in-FROM.  Grouping, aggregates, DISTINCT in views actually
work now (he says optimistically).  No UNION support in subselects/views
yet, but I have some ideas about that.  Rule-related permissions checking
moved out of rewriter and into executor.
INITDB REQUIRED!
This commit is contained in:
Tom Lane
2000-09-29 18:21:41 +00:00
parent 6f64c2e54a
commit 3a94e789f5
77 changed files with 3176 additions and 2661 deletions
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15
src/backend/parser/parse_expr.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.83 2000/09/12 21:07:02 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.84 2000/09/29 18:21:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -175,7 +175,7 @@ transformExpr(ParseState *pstate, Node *expr, int precedence)
result = ParseFuncOrColumn(pstate,
"nullvalue",
lcons(lexpr, NIL),
makeList1(lexpr),
false, false,
precedence);
}
@ -188,7 +188,7 @@ transformExpr(ParseState *pstate, Node *expr, int precedence)
result = ParseFuncOrColumn(pstate,
"nonnullvalue",
lcons(lexpr, NIL),
makeList1(lexpr),
false, false,
precedence);
}
@ -213,7 +213,7 @@ transformExpr(ParseState *pstate, Node *expr, int precedence)
expr->typeOid = BOOLOID;
expr->opType = AND_EXPR;
expr->args = makeList(lexpr, rexpr, -1);
expr->args = makeList2(lexpr, rexpr);
result = (Node *) expr;
}
break;
@ -235,7 +235,7 @@ transformExpr(ParseState *pstate, Node *expr, int precedence)
typeidTypeName(exprType(rexpr)), typeidTypeName(BOOLOID));
expr->typeOid = BOOLOID;
expr->opType = OR_EXPR;
expr->args = makeList(lexpr, rexpr, -1);
expr->args = makeList2(lexpr, rexpr);
result = (Node *) expr;
}
break;
@ -251,7 +251,7 @@ transformExpr(ParseState *pstate, Node *expr, int precedence)
typeidTypeName(exprType(rexpr)), typeidTypeName(BOOLOID));
expr->typeOid = BOOLOID;
expr->opType = NOT_EXPR;
expr->args = makeList(rexpr, -1);
expr->args = makeList1(rexpr);
result = (Node *) expr;
}
break;
@ -294,7 +294,8 @@ transformExpr(ParseState *pstate, Node *expr, int precedence)
break;
}
pstate->p_hasSubLinks = true;
qtrees = parse_analyze(lcons(sublink->subselect, NIL), pstate);
qtrees = parse_analyze(makeList1(sublink->subselect),
pstate);
if (length(qtrees) != 1)
elog(ERROR, "Bad query in subselect");
qtree = (Query *) lfirst(qtrees);