diff options
Diffstat (limited to 'sql')
| -rw-r--r-- | sql/sql_base.cc | 3 | ||||
| -rw-r--r-- | sql/sql_select.cc | 63 | ||||
| -rw-r--r-- | sql/table.cc | 2 |
3 files changed, 38 insertions, 30 deletions
diff --git a/sql/sql_base.cc b/sql/sql_base.cc index dc61f396605..0b14e5777c3 100644 --- a/sql/sql_base.cc +++ b/sql/sql_base.cc @@ -6160,6 +6160,9 @@ find_field_in_natural_join(THD *thd, TABLE_LIST *table_ref, const char *name, column reference. See create_view_field() for details. */ item= nj_col->create_item(thd); + if (!item) + DBUG_RETURN(NULL); + /* *ref != NULL means that *ref contains the item that we need to replace. If the item was aliased by the user, set the alias to diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 1f15d5bcec0..f7f6287c3fd 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -1245,10 +1245,19 @@ TODO: make view to decide if it is possible to write to WHERE directly or make S if (cond_value == Item::COND_FALSE || having_value == Item::COND_FALSE || (!unit->select_limit_cnt && !(select_options & OPTION_FOUND_ROWS))) { /* Impossible cond */ - DBUG_PRINT("info", (having_value == Item::COND_FALSE ? - "Impossible HAVING" : "Impossible WHERE")); - zero_result_cause= having_value == Item::COND_FALSE ? - "Impossible HAVING" : "Impossible WHERE"; + if (unit->select_limit_cnt) + { + DBUG_PRINT("info", (having_value == Item::COND_FALSE ? + "Impossible HAVING" : "Impossible WHERE")); + zero_result_cause= having_value == Item::COND_FALSE ? + "Impossible HAVING" : "Impossible WHERE"; + } + else + { + DBUG_PRINT("info", ("Zero limit")); + zero_result_cause= "Zero limit"; + conds= 0; + } table_count= top_join_tab_count= 0; error= 0; goto setup_subq_exit; @@ -24803,21 +24812,18 @@ void JOIN::set_allowed_join_cache_types() void JOIN::save_query_plan(Join_plan_state *save_to) { - if (keyuse.elements) - { - DYNAMIC_ARRAY tmp_keyuse; - /* Swap the current and the backup keyuse internal arrays. */ - tmp_keyuse= keyuse; - keyuse= save_to->keyuse; /* keyuse is reset to an empty array. */ - save_to->keyuse= tmp_keyuse; + DYNAMIC_ARRAY tmp_keyuse; + /* Swap the current and the backup keyuse internal arrays. */ + tmp_keyuse= keyuse; + keyuse= save_to->keyuse; /* keyuse is reset to an empty array. */ + save_to->keyuse= tmp_keyuse; - for (uint i= 0; i < table_count; i++) - { - save_to->join_tab_keyuse[i]= join_tab[i].keyuse; - join_tab[i].keyuse= NULL; - save_to->join_tab_checked_keys[i]= join_tab[i].checked_keys; - join_tab[i].checked_keys.clear_all(); - } + for (uint i= 0; i < table_count; i++) + { + save_to->join_tab_keyuse[i]= join_tab[i].keyuse; + join_tab[i].keyuse= NULL; + save_to->join_tab_checked_keys[i]= join_tab[i].checked_keys; + join_tab[i].checked_keys.clear_all(); } memcpy((uchar*) save_to->best_positions, (uchar*) best_positions, sizeof(POSITION) * (table_count + 1)); @@ -24855,20 +24861,17 @@ void JOIN::reset_query_plan() void JOIN::restore_query_plan(Join_plan_state *restore_from) { - if (restore_from->keyuse.elements) - { - DYNAMIC_ARRAY tmp_keyuse; - tmp_keyuse= keyuse; - keyuse= restore_from->keyuse; - restore_from->keyuse= tmp_keyuse; - - for (uint i= 0; i < table_count; i++) - { - join_tab[i].keyuse= restore_from->join_tab_keyuse[i]; - join_tab[i].checked_keys= restore_from->join_tab_checked_keys[i]; - } + DYNAMIC_ARRAY tmp_keyuse; + tmp_keyuse= keyuse; + keyuse= restore_from->keyuse; + restore_from->keyuse= tmp_keyuse; + for (uint i= 0; i < table_count; i++) + { + join_tab[i].keyuse= restore_from->join_tab_keyuse[i]; + join_tab[i].checked_keys= restore_from->join_tab_checked_keys[i]; } + memcpy((uchar*) best_positions, (uchar*) restore_from->best_positions, sizeof(POSITION) * (table_count + 1)); /* Restore SJM nests */ diff --git a/sql/table.cc b/sql/table.cc index b5082df7076..6a5cd7dba59 100644 --- a/sql/table.cc +++ b/sql/table.cc @@ -5336,6 +5336,8 @@ Item *create_view_field(THD *thd, TABLE_LIST *view, Item **field_ref, Item *item= new Item_direct_view_ref(&view->view->select_lex.context, field_ref, view->alias, name, view); + if (!item) + return NULL; /* Force creation of nullable item for the result tmp table for outer joined views/derived tables. |