diff options
Diffstat (limited to 'sql/sql_select.h')
| -rw-r--r-- | sql/sql_select.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sql/sql_select.h b/sql/sql_select.h index a27fbc60856..49ac58e913b 100644 --- a/sql/sql_select.h +++ b/sql/sql_select.h @@ -364,6 +364,10 @@ class JOIN :public Sql_alloc /* Server-side cursor (now stands only for basic read-only cursor) See class implementation in sql_select.cc + A cursor has its own runtime state - list of used items and memory root of + used memory - which is different from Prepared statement runtime: it must + be different at least for the purpose of reusing the same prepared + statement for many cursors. */ class Cursor: public Sql_alloc, public Item_arena |