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Replace planner's representation of relation sets, per pghackers discussion.

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Instead of Lists of integers, we now store variable-length bitmap sets.
This should be faster as well as less error-prone.
This commit is contained in:
Tom Lane
2003-02-08 20:20:55 +00:00
parent 893678eda7
commit c15a4c2aef
35 changed files with 1453 additions and 626 deletions
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50
src/backend/optimizer/prep/prepunion.c
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@ -14,7 +14,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.88 2003/01/20 18:54:54 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.89 2003/02/08 20:20:55 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -62,7 +62,7 @@ static List *generate_append_tlist(List *colTypes, bool flag,
List *refnames_tlist);
static Node *adjust_inherited_attrs_mutator(Node *node,
adjust_inherited_attrs_context *context);
static List *adjust_rtindex_list(List *relids, Index oldrelid, Index newrelid);
static Relids adjust_relid_set(Relids relids, Index oldrelid, Index newrelid);
static List *adjust_inherited_tlist(List *tlist, Oid new_relid);
@ -604,7 +604,7 @@ tlist_same_datatypes(List *tlist, List *colTypes, bool junkOK)
/*
* find_all_inheritors -
* Returns an integer list of relids including the given rel plus
* Returns an integer list of relation OIDs including the given rel plus
* all relations that inherit from it, directly or indirectly.
*/
List *
@ -662,6 +662,8 @@ find_all_inheritors(Oid parentrel)
* its inh flag cleared, whether or not there were any children. This
* ensures we won't expand the same RTE twice, which would otherwise occur
* for the case of an inherited UPDATE/DELETE target relation.
*
* XXX probably should convert the result type to Relids?
*/
List *
expand_inherted_rtentry(Query *parse, Index rti, bool dup_parent)
@ -840,13 +842,13 @@ adjust_inherited_attrs_mutator(Node *node,
ininfo = (InClauseInfo *) expression_tree_mutator(node,
adjust_inherited_attrs_mutator,
(void *) context);
/* now fix InClauseInfo's rtindex lists */
ininfo->lefthand = adjust_rtindex_list(ininfo->lefthand,
context->old_rt_index,
context->new_rt_index);
ininfo->righthand = adjust_rtindex_list(ininfo->righthand,
context->old_rt_index,
context->new_rt_index);
/* now fix InClauseInfo's relid sets */
ininfo->lefthand = adjust_relid_set(ininfo->lefthand,
context->old_rt_index,
context->new_rt_index);
ininfo->righthand = adjust_relid_set(ininfo->righthand,
context->old_rt_index,
context->new_rt_index);
return (Node *) ininfo;
}
@ -873,14 +875,14 @@ adjust_inherited_attrs_mutator(Node *node,
newinfo->subclauseindices = NIL;
/*
* Adjust left/right relids lists too.
* Adjust left/right relid sets too.
*/
newinfo->left_relids = adjust_rtindex_list(oldinfo->left_relids,
context->old_rt_index,
context->new_rt_index);
newinfo->right_relids = adjust_rtindex_list(oldinfo->right_relids,
context->old_rt_index,
context->new_rt_index);
newinfo->left_relids = adjust_relid_set(oldinfo->left_relids,
context->old_rt_index,
context->new_rt_index);
newinfo->right_relids = adjust_relid_set(oldinfo->right_relids,
context->old_rt_index,
context->new_rt_index);
newinfo->eval_cost.startup = -1; /* reset these too */
newinfo->this_selec = -1;
@ -928,18 +930,18 @@ adjust_inherited_attrs_mutator(Node *node,
}
/*
* Substitute newrelid for oldrelid in a list of RT indexes
* Substitute newrelid for oldrelid in a Relid set
*/
static List *
adjust_rtindex_list(List *relids, Index oldrelid, Index newrelid)
static Relids
adjust_relid_set(Relids relids, Index oldrelid, Index newrelid)
{
if (intMember(oldrelid, relids))
if (bms_is_member(oldrelid, relids))
{
/* Ensure we have a modifiable copy */
relids = listCopy(relids);
relids = bms_copy(relids);
/* Remove old, add new */
relids = lremovei(oldrelid, relids);
relids = lconsi(newrelid, relids);
relids = bms_del_member(relids, oldrelid);
relids = bms_add_member(relids, newrelid);
}
return relids;
}