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