diff options
Diffstat (limited to 'sql/opt_subselect.h')
| -rw-r--r-- | sql/opt_subselect.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/sql/opt_subselect.h b/sql/opt_subselect.h index 532e43567e8..5a7416fe929 100644 --- a/sql/opt_subselect.h +++ b/sql/opt_subselect.h @@ -1,4 +1,6 @@ -/* */ +/* + Semi-join subquery optimization code definitions +*/ #ifdef USE_PRAGMA_INTERFACE #pragma interface /* gcc class implementation */ @@ -199,7 +201,8 @@ public: double records= rows2double(s->table->file->stats.records); /* The cost is entire index scan cost (divided by 2) */ - double read_time= s->table->file->keyread_time(key, 1, records); + double read_time= s->table->file->keyread_time(key, 1, + (ha_rows) records); /* Now find out how many different keys we will get (for now we @@ -282,7 +285,9 @@ void restore_prev_sj_state(const table_map remaining_tables, const JOIN_TAB *tab, uint idx); void fix_semijoin_strategies_for_picked_join_order(JOIN *join); -bool setup_sj_materialization(JOIN_TAB *tab); + +bool setup_sj_materialization_part1(JOIN_TAB *sjm_tab); +bool setup_sj_materialization_part2(JOIN_TAB *sjm_tab); TABLE *create_duplicate_weedout_tmp_table(THD *thd, uint uniq_tuple_length_arg, SJ_TMP_TABLE *sjtbl); @@ -365,4 +370,10 @@ int clear_sj_tmp_tables(JOIN *join); int rewrite_to_index_subquery_engine(JOIN *join); +void get_delayed_table_estimates(TABLE *table, + ha_rows *out_rows, + double *scan_time, + double *startup_cost); + +enum_nested_loop_state join_tab_execution_startup(JOIN_TAB *tab); |