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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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17
src/backend/optimizer/util/clauses.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/util/clauses.c,v 1.127 2003/02/04 00:50:00 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/util/clauses.c,v 1.128 2003/02/08 20:20:55 tgl Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -885,7 +885,7 @@ has_distinct_on_clause(Query *query)
* clause_get_relids_vars
* Retrieves distinct relids and vars appearing within a clause.
*
* '*relids' is set to an integer list of all distinct "varno"s appearing
* '*relids' is set to the set of all distinct "varno"s appearing
* in Vars within the clause.
* '*vars' is set to a list of all distinct Vars appearing within the clause.
* Var nodes are considered distinct if they have different varno
@@ -899,7 +899,7 @@ void
clause_get_relids_vars(Node *clause, Relids *relids, List **vars)
{
List *clvars = pull_var_clause(clause, false);
List *varno_list = NIL;
Relids varnos = NULL;
List *var_list = NIL;
List *i;
@@ -908,8 +908,7 @@ clause_get_relids_vars(Node *clause, Relids *relids, List **vars)
Var *var = (Var *) lfirst(i);
List *vi;
if (!intMember(var->varno, varno_list))
varno_list = lconsi(var->varno, varno_list);
varnos = bms_add_member(varnos, var->varno);
foreach(vi, var_list)
{
Var *in_list = (Var *) lfirst(vi);
@@ -923,7 +922,7 @@ clause_get_relids_vars(Node *clause, Relids *relids, List **vars)
}
freeList(clvars);
*relids = varno_list;
*relids = varnos;
*vars = var_list;
}
@@ -936,10 +935,10 @@ clause_get_relids_vars(Node *clause, Relids *relids, List **vars)
int
NumRelids(Node *clause)
{
List *varno_list = pull_varnos(clause);
int result = length(varno_list);
Relids varnos = pull_varnos(clause);
int result = bms_num_members(varnos);
freeList(varno_list);
bms_free(varnos);
return result;
}