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First cut at full support for OUTER JOINs. There are still a few loose

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ends to clean up (see my message of same date to pghackers), but mostly
it works.  INITDB REQUIRED!
This commit is contained in:
Tom Lane
2000-09-12 21:07:18 +00:00
parent b5c0ab278b
commit ed5003c584
93 changed files with 6386 additions and 4262 deletions
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1
src/backend/optimizer/prep/prepkeyset.c
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@ -107,6 +107,7 @@ transformKeySetQuery(Query *origNode)
Node_Copy(origNode, unionNode, distinctClause);
Node_Copy(origNode, unionNode, sortClause);
Node_Copy(origNode, unionNode, rtable);
Node_Copy(origNode, unionNode, jointree);
Node_Copy(origNode, unionNode, targetList);
origNode->unionClause = lappend(origNode->unionClause, unionNode);

48
src/backend/optimizer/prep/prepunion.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.51 2000/06/20 04:22:16 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.52 2000/09/12 21:06:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -528,12 +528,9 @@ fix_parsetree_attnums(Index rt_index,
context.new_relid = new_relid;
context.sublevels_up = 0;
/*
* We must scan both the targetlist and qual, but we know the
* havingQual is empty, so we can ignore it.
*/
fix_parsetree_attnums_walker((Node *) parsetree->targetList, &context);
fix_parsetree_attnums_walker((Node *) parsetree->qual, &context);
query_tree_walker(parsetree,
fix_parsetree_attnums_walker,
(void *) &context);
}
/*
@ -565,38 +562,17 @@ fix_parsetree_attnums_walker(Node *node,
}
return false;
}
if (IsA(node, SubLink))
{
/*
* Standard expression_tree_walker will not recurse into
* subselect, but here we must do so.
*/
SubLink *sub = (SubLink *) node;
if (fix_parsetree_attnums_walker((Node *) (sub->lefthand), context))
return true;
context->sublevels_up++;
if (fix_parsetree_attnums_walker((Node *) (sub->subselect), context))
{
context->sublevels_up--;
return true;
}
context->sublevels_up--;
return false;
}
if (IsA(node, Query))
{
/* Reach here after recursing down into subselect above... */
Query *qry = (Query *) node;
/* Recurse into subselects */
bool result;
if (fix_parsetree_attnums_walker((Node *) (qry->targetList), context))
return true;
if (fix_parsetree_attnums_walker((Node *) (qry->qual), context))
return true;
if (fix_parsetree_attnums_walker((Node *) (qry->havingQual), context))
return true;
return false;
context->sublevels_up++;
result = query_tree_walker((Query *) node,
fix_parsetree_attnums_walker,
(void *) context);
context->sublevels_up--;
return result;
}
return expression_tree_walker(node, fix_parsetree_attnums_walker,
(void *) context);