diff options
Diffstat (limited to 'sql/table.h')
| -rw-r--r-- | sql/table.h | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/sql/table.h b/sql/table.h index ed90cfb9527..b5d55ea7e50 100644 --- a/sql/table.h +++ b/sql/table.h @@ -966,7 +966,13 @@ struct st_table { key_read= 1; file->extra(HA_EXTRA_KEYREAD); DBUG_VOID_RETURN; - } + } + /* + If TRUE, the table is filled at execution phase (and so, the optimizer + should not do things like range analysis or constant table detection on + it). + */ + bool is_filled_at_execution(); inline void disable_keyread() { DBUG_ENTER("disable_keyread"); @@ -1195,7 +1201,7 @@ class Item_in_subselect; 1) table (TABLE_LIST::view == NULL) - base table (TABLE_LIST::derived == NULL) - - subquery - TABLE_LIST::table is a temp table + - FROM-clause subquery - TABLE_LIST::table is a temp table (TABLE_LIST::derived != NULL) - information schema table (TABLE_LIST::schema_table != NULL) @@ -1214,6 +1220,8 @@ class Item_in_subselect; (TABLE_LIST::natural_join != NULL) - JOIN ... USING (TABLE_LIST::join_using_fields != NULL) + - semi-join nest (sj_on_expr!= NULL && sj_subq_pred!=NULL) + 4) jtbm semi-join (jtbm_subselect != NULL) */ class Index_hint; @@ -1256,8 +1264,14 @@ struct TABLE_LIST */ table_map sj_inner_tables; /* Number of IN-compared expressions */ - uint sj_in_exprs; + uint sj_in_exprs; + + /* If this is a non-jtbm semi-join nest: corresponding subselect predicate */ Item_in_subselect *sj_subq_pred; + + /* If this is a jtbm semi-join object: corresponding subselect predicate */ + Item_in_subselect *jtbm_subselect; + SJ_MATERIALIZATION_INFO *sj_mat_info; /* |