diff options
Diffstat (limited to 'sql/table.h')
| -rw-r--r-- | sql/table.h | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/sql/table.h b/sql/table.h index 3b1f8244e1d..5ab1f900195 100644 --- a/sql/table.h +++ b/sql/table.h @@ -217,14 +217,18 @@ struct st_table { uint derived_select_number; int current_lock; /* Type of lock on table */ my_bool copy_blobs; /* copy_blobs when storing */ + + /* + 0 or JOIN_TYPE_{LEFT|RIGHT}. Currently this is only compared to 0. + If maybe_null !=0, this table is inner w.r.t. some outer join operation, + and null_row may be true. + */ + uint maybe_null; /* - Used in outer joins: if true, all columns are considered to have NULL - values, including columns declared as "not null". + If true, the current table row is considered to have all columns set to + NULL, including columns declared as "not null" (see maybe_null). */ my_bool null_row; - /* 0 or JOIN_TYPE_{LEFT|RIGHT}, same as TABLE_LIST::outer_join */ - my_bool outer_join; - my_bool maybe_null; /* true if (outer_join != 0) */ my_bool force_index; my_bool distinct,const_table,no_rows; my_bool key_read, no_keyread; @@ -388,6 +392,10 @@ typedef struct st_table_list uint effective_algorithm; /* which algorithm was really used */ uint privilege_backup; /* place for saving privileges */ GRANT_INFO grant; + /* data need by some engines in query cache*/ + ulonglong engine_data; + /* call back function for asking handler about caching in query cache */ + qc_engine_callback callback_func; thr_lock_type lock_type; uint outer_join; /* Which join type */ uint shared; /* Used in multi-upd */ |