diff options
Diffstat (limited to 'sql/sql_select.cc')
| -rw-r--r-- | sql/sql_select.cc | 96 |
1 files changed, 95 insertions, 1 deletions
diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 41b6f8894ab..a7ba0c9ffff 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -366,7 +366,6 @@ bool dbug_user_var_equals_int(THD *thd, const char *name, int value) } #endif /* DBUG_OFF */ - /* Intialize POSITION structure. */ @@ -391,6 +390,100 @@ POSITION::POSITION() } +void JOIN::init(THD *thd_arg, List<Item> &fields_arg, + ulonglong select_options_arg, select_result *result_arg) +{ + join_tab= 0; + table= 0; + table_count= 0; + top_join_tab_count= 0; + const_tables= 0; + const_table_map= found_const_table_map= 0; + aggr_tables= 0; + eliminated_tables= 0; + join_list= 0; + implicit_grouping= FALSE; + sort_and_group= 0; + first_record= 0; + do_send_rows= 1; + duplicate_rows= send_records= 0; + found_records= accepted_rows= 0; + fetch_limit= HA_POS_ERROR; + thd= thd_arg; + sum_funcs= sum_funcs2= 0; + procedure= 0; + having= tmp_having= having_history= 0; + having_is_correlated= false; + group_list_for_estimates= 0; + select_options= select_options_arg; + result= result_arg; + lock= thd_arg->lock; + select_lex= 0; //for safety + select_distinct= MY_TEST(select_options & SELECT_DISTINCT); + no_order= 0; + simple_order= 0; + simple_group= 0; + rand_table_in_field_list= 0; + ordered_index_usage= ordered_index_void; + need_distinct= 0; + skip_sort_order= 0; + with_two_phase_optimization= 0; + save_qep= 0; + spl_opt_info= 0; + ext_keyuses_for_splitting= 0; + spl_opt_info= 0; + need_tmp= 0; + hidden_group_fields= 0; /*safety*/ + error= 0; + select= 0; + return_tab= 0; + ref_ptrs.reset(); + items0.reset(); + items1.reset(); + items2.reset(); + items3.reset(); + zero_result_cause= 0; + optimization_state= JOIN::NOT_OPTIMIZED; + have_query_plan= QEP_NOT_PRESENT_YET; + initialized= 0; + cleaned= 0; + cond_equal= 0; + having_equal= 0; + exec_const_cond= 0; + group_optimized_away= 0; + no_rows_in_result_called= 0; + positions= best_positions= 0; + pushdown_query= 0; + original_join_tab= 0; + explain= NULL; + tmp_table_keep_current_rowid= 0; + + all_fields= fields_arg; + if (&fields_list != &fields_arg) /* Avoid valgrind-warning */ + fields_list= fields_arg; + non_agg_fields.empty(); + bzero((char*) &keyuse,sizeof(keyuse)); + having_value= Item::COND_UNDEF; + tmp_table_param.init(); + tmp_table_param.end_write_records= HA_POS_ERROR; + rollup.state= ROLLUP::STATE_NONE; + + no_const_tables= FALSE; + first_select= sub_select; + set_group_rpa= false; + group_sent= 0; + + outer_ref_cond= pseudo_bits_cond= NULL; + in_to_exists_where= NULL; + in_to_exists_having= NULL; + emb_sjm_nest= NULL; + sjm_lookup_tables= 0; + sjm_scan_tables= 0; + is_orig_degenerated= false; + with_ties_order_count= 0; +}; + + static void trace_table_dependencies(THD *thd, JOIN_TAB *join_tabs, uint table_count) { @@ -29888,6 +29981,7 @@ bool JOIN::optimize_upper_rownum_func() return process_direct_rownum_comparison(thd, unit, outer_select->where); } + /** Test if the predicate compares rownum() with a constant |