diff options
Diffstat (limited to 'sql/sql_lex.h')
| -rw-r--r-- | sql/sql_lex.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/sql/sql_lex.h b/sql/sql_lex.h index cefa092a874..6f72c9e3f7b 100644 --- a/sql/sql_lex.h +++ b/sql/sql_lex.h @@ -122,6 +122,7 @@ enum enum_sql_command { SQLCOM_SHOW_PROFILE, SQLCOM_SHOW_PROFILES, SQLCOM_SHOW_USER_STATS, SQLCOM_SHOW_TABLE_STATS, SQLCOM_SHOW_INDEX_STATS, SQLCOM_SHOW_CLIENT_STATS, + SQLCOM_SHOW_EXPLAIN, /* When a command is added here, be sure it's also added in mysqld.cc @@ -255,6 +256,8 @@ typedef uchar index_clause_map; #define INDEX_HINT_MASK_ALL (INDEX_HINT_MASK_JOIN | INDEX_HINT_MASK_GROUP | \ INDEX_HINT_MASK_ORDER) +class select_result_sink; + /* Single element of an USE/FORCE/IGNORE INDEX list specified as a SQL hint */ class Index_hint : public Sql_alloc { @@ -592,6 +595,7 @@ public: friend int subselect_union_engine::exec(); List<Item> *get_unit_column_types(); + int print_explain(select_result_sink *output); }; typedef class st_select_lex_unit SELECT_LEX_UNIT; @@ -643,6 +647,12 @@ public: those converted to jtbm nests. The list is emptied when conversion is done. */ List<Item_in_subselect> sj_subselects; + + /* + Needed to correctly generate 'PRIMARY' or 'SIMPLE' for select_type column + of EXPLAIN + */ + bool have_merged_subqueries; List<TABLE_LIST> leaf_tables; List<TABLE_LIST> leaf_tables_exec; @@ -883,7 +893,7 @@ public: */ bool optimize_unflattened_subqueries(); /* Set the EXPLAIN type for this subquery. */ - void set_explain_type(); + void set_explain_type(bool on_the_fly); bool handle_derived(struct st_lex *lex, uint phases); void append_table_to_list(TABLE_LIST *TABLE_LIST::*link, TABLE_LIST *table); bool get_free_table_map(table_map *map, uint *tablenr); @@ -906,8 +916,9 @@ public: bool save_leaf_tables(THD *thd); bool save_prep_leaf_tables(THD *thd); - bool is_merged_child_of(st_select_lex *ancestor); + bool is_merged_child_of(st_select_lex *ancestor); + int print_explain(select_result_sink *output); /* For MODE_ONLY_FULL_GROUP_BY we need to maintain two flags: - Non-aggregated fields are used in this select. |