Changeset: de45b59652a3 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/de45b59652a3
Modified Files:
sql/server/rel_statistics.c
Branch: properties
Log Message:
Signal expression as found but don't propagate properties for table relations
yet
diffs (32 lines):
diff --git a/sql/server/rel_statistics.c b/sql/server/rel_statistics.c
--- a/sql/server/rel_statistics.c
+++ b/sql/server/rel_statistics.c
@@ -168,16 +168,18 @@ rel_propagate_column_ref_statistics(mvc
case op_groupby: {
sql_exp *found;
atom *fval;
- if ((found = rel_find_exp(rel, e)) && rel->op !=
op_table) {
- if ((fval = find_prop_and_get(found->p,
PROP_MAX)))
- set_property(sql, e, PROP_MAX, fval);
- if ((fval = find_prop_and_get(found->p,
PROP_MIN)))
- set_property(sql, e, PROP_MIN, fval);
- if (!has_nil(found))
- set_has_no_nil(e);
- if (is_unique(found) || (need_distinct(rel) &&
list_length(rel->exps) == 1) ||
- (is_groupby(rel->op) &&
list_length(rel->r) == 1 && exps_find_exp(rel->r, e)))
- set_unique(e);
+ if ((found = rel_find_exp(rel, e))) {
+ if (rel->op != op_table) { /* At the moment
don't propagate statistics for table relations */
+ if ((fval = find_prop_and_get(found->p,
PROP_MAX)))
+ set_property(sql, e, PROP_MAX,
fval);
+ if ((fval = find_prop_and_get(found->p,
PROP_MIN)))
+ set_property(sql, e, PROP_MIN,
fval);
+ if (!has_nil(found))
+ set_has_no_nil(e);
+ if (is_unique(found) ||
(need_distinct(rel) && list_length(rel->exps) == 1) ||
+ (is_groupby(rel->op) &&
list_length(rel->r) == 1 && exps_find_exp(rel->r, e)))
+ set_unique(e);
+ }
return e;
}
return NULL;
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