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MergeSort was sometimes called mergejoin and was confusing. Now

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it is now only mergejoin.
This commit is contained in:
Bruce Momjian
1998-08-04 16:44:31 +00:00
parent 7db9ea5c1e
commit d9be0ff432
23 changed files with 117 additions and 116 deletions
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30
src/backend/optimizer/plan/initsplan.c
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@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/initsplan.c,v 1.13 1998/07/18 04:22:37 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/initsplan.c,v 1.14 1998/08/04 16:44:14 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -41,7 +41,7 @@ add_join_clause_info_to_rels(Query *root, CInfo *clauseinfo,
List *join_relids);
static void add_vars_to_rels(Query *root, List *vars, List *join_relids);
static MergeOrder *mergesortop(Expr *clause);
static MergeOrder *mergejoinop(Expr *clause);
static Oid hashjoinop(Expr *clause);
@@ -180,7 +180,7 @@ add_clause_to_rels(Query *root, List *clause)
clauseinfo->notclause = contains_not((Node *) clause);
clauseinfo->selectivity = 0;
clauseinfo->indexids = NIL;
clauseinfo->mergesortorder = (MergeOrder *) NULL;
clauseinfo->mergejoinorder = (MergeOrder *) NULL;
clauseinfo->hashjoinoperator = (Oid) 0;
@@ -324,8 +324,8 @@ add_vars_to_rels(Query *root, List *vars, List *join_relids)
/*
* initialize-join-clause-info--
* Set the MergeSortable or HashJoinable field for every joininfo node
* (within a rel node) and the MergeSortOrder or HashJoinOp field for
* Set the MergeJoinable or HashJoinable field for every joininfo node
* (within a rel node) and the MergeJoinOrder or HashJoinOp field for
* each clauseinfo node(within a joininfo node) for all relations in a
* query.
*
@@ -357,15 +357,15 @@ initialize_join_clause_info(List *rel_list)
MergeOrder *sortop = (MergeOrder *) NULL;
Oid hashop = (Oid) NULL;
if (_enable_mergesort_)
sortop = mergesortop(clause);
if (_enable_mergejoin_)
sortop = mergejoinop(clause);
if (_enable_hashjoin_)
hashop = hashjoinop(clause);
if (sortop)
{
clauseinfo->mergesortorder = sortop;
joininfo->mergesortable = true;
clauseinfo->mergejoinorder = sortop;
joininfo->mergejoinable = true;
}
if (hashop)
{
@@ -379,19 +379,19 @@ initialize_join_clause_info(List *rel_list)
}
/*
* mergesortop--
* Returns the mergesort operator of an operator iff 'clause' is
* mergesortable, i.e., both operands are single vars and the operator is
* a mergesortable operator.
* mergejoinop--
* Returns the mergejoin operator of an operator iff 'clause' is
* mergejoinable, i.e., both operands are single vars and the operator is
* a mergejoinable operator.
*/
static MergeOrder *
mergesortop(Expr *clause)
mergejoinop(Expr *clause)
{
Oid leftOp,
rightOp;
bool sortable;
sortable = op_mergesortable(((Oper *) clause->oper)->opno,
sortable = op_mergejoinable(((Oper *) clause->oper)->opno,
(get_leftop(clause))->vartype,
(get_rightop(clause))->vartype,
&leftOp,