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| author | Igor Babaev <igor@askmonty.org> | 2011-01-15 11:14:36 -0800 |
|---|---|---|
| committer | Igor Babaev <igor@askmonty.org> | 2011-01-15 11:14:36 -0800 |
| commit | 84a0c9b2a245a166b87296b0aa9218730be89c21 (patch) | |
| tree | 205a92844a464232a6992e38ef00b6e2780801db /sql/opt_table_elimination.cc | |
| parent | cb4fa7f401267bf887066100726c53f10b712e6d (diff) | |
| download | mariadb-git-84a0c9b2a245a166b87296b0aa9218730be89c21.tar.gz | |
Fixed LP bug #698882.
Made sure that the optimal fields are used by TABLE_REF objects
when building index access keys to joined tables.
Fixed a bug in the template function that sorts the elements of
a list using the bubble sort algorithm. The bug caused poor
performance of the function. Also added an optimization that
skips comparison with the most heavy elements that has been
already properly placed in the list.
Made the comparison of the fields belonging to the same Item_equal
more granular: fields belonging to the same table are also ordered
according to some rules.
Diffstat (limited to 'sql/opt_table_elimination.cc')
| -rw-r--r-- | sql/opt_table_elimination.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/opt_table_elimination.cc b/sql/opt_table_elimination.cc index be1471b7e2c..7497395d628 100644 --- a/sql/opt_table_elimination.cc +++ b/sql/opt_table_elimination.cc @@ -1232,7 +1232,7 @@ void build_eq_mods_for_cond(Dep_analysis_context *ctx, if (fvl->elements) { - exchange_sort<Dep_value_field>(fvl, compare_field_values, NULL); + bubble_sort<Dep_value_field>(fvl, compare_field_values, NULL); add_module_expr(ctx, eq_mod, *and_level, NULL, bound_item, fvl); } break; |