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| author | Igor Babaev <igor@askmonty.org> | 2014-03-22 12:44:39 -0700 |
|---|---|---|
| committer | Igor Babaev <igor@askmonty.org> | 2014-03-22 12:44:39 -0700 |
| commit | 887a210ffc5c38cf9623ad308b68094510f1bfbb (patch) | |
| tree | a85969eab11e043ec288a9b5f75be924897a2f3b /sql/opt_range.cc | |
| parent | b35296911886143267ea471530e701169e5f7f56 (diff) | |
| download | mariadb-git-887a210ffc5c38cf9623ad308b68094510f1bfbb.tar.gz | |
Fixed bug mdev-5931.
After constant table row substitution the where condition may be converted
to always true. The function calculate_cond_selectivity_for_table() should
take into account this possibility.
Diffstat (limited to 'sql/opt_range.cc')
| -rw-r--r-- | sql/opt_range.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/opt_range.cc b/sql/opt_range.cc index dc8a5475162..cbc3d285d0a 100644 --- a/sql/opt_range.cc +++ b/sql/opt_range.cc @@ -3409,7 +3409,7 @@ bool calculate_cond_selectivity_for_table(THD *thd, TABLE *table, Item *cond) table->cond_selectivity= 1.0; - if (table_records == 0) + if (!cond || table_records == 0) DBUG_RETURN(FALSE); if (table->pos_in_table_list->schema_table) |