diff options
Diffstat (limited to 'sql/sql_lex.h')
| -rw-r--r-- | sql/sql_lex.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sql/sql_lex.h b/sql/sql_lex.h index b4dbbc5162e..035fa1fde91 100644 --- a/sql/sql_lex.h +++ b/sql/sql_lex.h @@ -1836,6 +1836,16 @@ typedef struct st_lex : public Query_tables_list uint create_select_pos; bool create_select_in_comment; + /* + The set of those tables whose fields are referenced in all subqueries + of the query. + TODO: possibly this it is incorrect to have used tables in LEX because + with subquery, it is not clear what does the field mean. To fix this + we should aggregate used tables information for selected expressions + into the select_lex. + */ + table_map used_tables; + st_lex(); virtual ~st_lex() |