diff options
Diffstat (limited to 'sql/opt_range.cc')
| -rw-r--r-- | sql/opt_range.cc | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/sql/opt_range.cc b/sql/opt_range.cc index 323e829f219..12b00a62012 100644 --- a/sql/opt_range.cc +++ b/sql/opt_range.cc @@ -5737,6 +5737,7 @@ bool QUICK_ROR_UNION_SELECT::check_if_keys_used(List<Item> *fields) /* Create quick select from ref/ref_or_null scan. + SYNOPSIS get_quick_select_for_ref() thd Thread handle @@ -5756,15 +5757,18 @@ bool QUICK_ROR_UNION_SELECT::check_if_keys_used(List<Item> *fields) QUICK_RANGE_SELECT *get_quick_select_for_ref(THD *thd, TABLE *table, TABLE_REF *ref, ha_rows records) { - MEM_ROOT *old_root= thd->mem_root; - /* The following call may change thd->mem_root */ - QUICK_RANGE_SELECT *quick= new QUICK_RANGE_SELECT(thd, table, ref->key, 0); - /* save mem_root set by QUICK_RANGE_SELECT constructor */ - MEM_ROOT *alloc= thd->mem_root; + MEM_ROOT *old_root, *alloc; + QUICK_RANGE_SELECT *quick; KEY *key_info = &table->key_info[ref->key]; KEY_PART *key_part; QUICK_RANGE *range; uint part; + + old_root= thd->mem_root; + /* The following call may change thd->mem_root */ + quick= new QUICK_RANGE_SELECT(thd, table, ref->key, 0); + /* save mem_root set by QUICK_RANGE_SELECT constructor */ + alloc= thd->mem_root; /* return back default mem_root (thd->mem_root) changed by QUICK_RANGE_SELECT constructor |