diff options
Diffstat (limited to 'sql/sql_select.h')
| -rw-r--r-- | sql/sql_select.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/sql/sql_select.h b/sql/sql_select.h index f8911fbba01..a2c21e06bf2 100644 --- a/sql/sql_select.h +++ b/sql/sql_select.h @@ -1470,6 +1470,11 @@ public: Dynamic_array<KEYUSE_EXT> *ext_keyuses_for_splitting; JOIN_TAB *sort_and_group_aggr_tab; + /* + Flag is set to true if select_lex was found to be degenerated before + the optimize_cond() call in JOIN::optimize_inner() method. + */ + bool is_orig_degenerated; JOIN(THD *thd_arg, List<Item> &fields_arg, ulonglong select_options_arg, select_result *result_arg) @@ -1564,6 +1569,7 @@ public: emb_sjm_nest= NULL; sjm_lookup_tables= 0; sjm_scan_tables= 0; + is_orig_degenerated= false; } /* True if the plan guarantees that it will be returned zero or one row */ @@ -1734,6 +1740,7 @@ public: bool fix_all_splittings_in_plan(); bool transform_in_predicates_into_in_subq(THD *thd); + bool add_equalities_to_where_condition(THD *thd, List<Item> &eq_list); private: /** Create a temporary table to be used for processing DISTINCT/ORDER @@ -2325,7 +2332,7 @@ Item_equal *find_item_equal(COND_EQUAL *cond_equal, Field *field, extern bool test_if_ref(Item *, Item_field *left_item,Item *right_item); -inline bool optimizer_flag(THD *thd, uint flag) +inline bool optimizer_flag(THD *thd, ulonglong flag) { return (thd->variables.optimizer_switch & flag); } @@ -2440,4 +2447,13 @@ int create_sort_index(THD *thd, JOIN *join, JOIN_TAB *tab, Filesort *fsort); JOIN_TAB *first_explain_order_tab(JOIN* join); JOIN_TAB *next_explain_order_tab(JOIN* join, JOIN_TAB* tab); +bool check_simple_equality(THD *thd, const Item::Context &ctx, + Item *left_item, Item *right_item, + COND_EQUAL *cond_equal); + +void propagate_new_equalities(THD *thd, Item *cond, + List<Item_equal> *new_equalities, + COND_EQUAL *inherited, + bool *is_simplifiable_cond); + #endif /* SQL_SELECT_INCLUDED */ |