diff options
Diffstat (limited to 'sql/sql_select.h')
| -rw-r--r-- | sql/sql_select.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/sql/sql_select.h b/sql/sql_select.h index 30b8f834ddf..629b44538d8 100644 --- a/sql/sql_select.h +++ b/sql/sql_select.h @@ -36,6 +36,8 @@ typedef struct keyuse_t { satisfied if val has NULL 'value'. */ bool null_rejecting; + /* TRUE<=> This ref access is an outer subquery reference access */ + bool outer_ref; } KEYUSE; class store_key; @@ -455,10 +457,11 @@ class store_key :public Sql_alloc Field *to_field; // Store data here char *null_ptr; char err; - public: +public: + bool null_key; /* TRUE <=> the value of the key has a null part */ enum store_key_result { STORE_KEY_OK, STORE_KEY_FATAL, STORE_KEY_CONV }; store_key(THD *thd, Field *field_arg, char *ptr, char *null, uint length) - :null_ptr(null),err(0) + :null_ptr(null), err(0), null_key(0) { if (field_arg->type() == FIELD_TYPE_BLOB) { @@ -496,6 +499,7 @@ class store_key_field: public store_key enum store_key_result copy() { copy_field.do_copy(©_field); + null_key= to_field->is_null(); return err != 0 ? STORE_KEY_FATAL : STORE_KEY_OK; } const char *name() const { return field_name; } @@ -516,8 +520,8 @@ public: enum store_key_result copy() { int res= item->save_in_field(to_field, 1); + null_key= to_field->is_null() || item->null_value; return (err != 0 || res > 2 ? STORE_KEY_FATAL : (store_key_result) res); - } const char *name() const { return "func"; } }; @@ -547,6 +551,7 @@ public: err= res; } } + null_key= to_field->is_null() || item->null_value; return (err > 2 ? STORE_KEY_FATAL : (store_key_result) err); } const char *name() const { return "const"; } |