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Allow ORDER BY, LIMIT in sub-selects. Fix most (not all) cases where

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the grammar did not allow redundant parentheses around sub-selects.
Distinguish LIMIT ALL from LIMIT 0; make the latter behave as one would
expect.
This commit is contained in:
Tom Lane
2000-11-05 00:15:54 +00:00
parent 66436e66e1
commit 11f7b29054
8 changed files with 400 additions and 230 deletions
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8
src/backend/nodes/copyfuncs.c
View File

@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.128 2000/10/31 10:22:10 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.129 2000/11/05 00:15:52 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1826,6 +1826,7 @@ _copySelectStmt(SelectStmt *from)
Node_Copy(from, newnode, distinctClause);
if (from->into)
newnode->into = pstrdup(from->into);
newnode->istemp = from->istemp;
Node_Copy(from, newnode, targetList);
Node_Copy(from, newnode, fromClause);
Node_Copy(from, newnode, whereClause);
@ -1835,10 +1836,13 @@ _copySelectStmt(SelectStmt *from)
if (from->portalname)
newnode->portalname = pstrdup(from->portalname);
newnode->binary = from->binary;
newnode->istemp = from->istemp;
Node_Copy(from, newnode, limitOffset);
Node_Copy(from, newnode, limitCount);
Node_Copy(from, newnode, forUpdate);
newnode->op = from->op;
newnode->all = from->all;
Node_Copy(from, newnode, larg);
Node_Copy(from, newnode, rarg);
return newnode;
}

14
src/backend/nodes/equalfuncs.c
View File

@ -20,7 +20,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.78 2000/10/31 10:22:10 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.79 2000/11/05 00:15:52 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -686,6 +686,8 @@ _equalSelectStmt(SelectStmt *a, SelectStmt *b)
return false;
if (!equalstr(a->into, b->into))
return false;
if (a->istemp != b->istemp)
return false;
if (!equal(a->targetList, b->targetList))
return false;
if (!equal(a->fromClause, b->fromClause))
@ -702,14 +704,20 @@ _equalSelectStmt(SelectStmt *a, SelectStmt *b)
return false;
if (a->binary != b->binary)
return false;
if (a->istemp != b->istemp)
return false;
if (!equal(a->limitOffset, b->limitOffset))
return false;
if (!equal(a->limitCount, b->limitCount))
return false;
if (!equal(a->forUpdate, b->forUpdate))
return false;
if (a->op != b->op)
return false;
if (a->all != b->all)
return false;
if (!equal(a->larg, b->larg))
return false;
if (!equal(a->rarg, b->rarg))
return false;
return true;
}