diff options
Diffstat (limited to 'sql/sql_lex.h')
| -rw-r--r-- | sql/sql_lex.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/sql/sql_lex.h b/sql/sql_lex.h index 29301053c59..15da6ca57a3 100644 --- a/sql/sql_lex.h +++ b/sql/sql_lex.h @@ -309,7 +309,13 @@ protected: public: // list of fields which points to temporary table for union List<Item> item_list; - // list of types of items inside union (used for union & derived tables) + /* + list of types of items inside union (used for union & derived tables) + + Item_type_holders from which this list consist may have pointers to Field, + pointers is valid only after preparing SELECTS of this unit and before + any SELECT of this unit execution + */ List<Item> types; /* Pointer to 'last' select or pointer to unit where stored |