diff options
Diffstat (limited to 'sql/sql_base.cc')
| -rw-r--r-- | sql/sql_base.cc | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sql/sql_base.cc b/sql/sql_base.cc index 3fb2fac5b27..8a7ae2dffc3 100644 --- a/sql/sql_base.cc +++ b/sql/sql_base.cc @@ -2758,6 +2758,20 @@ bool setup_fields(THD *thd, Item **ref_pointer_array, TABLE_LIST *tables, thd->allow_sum_func= allow_sum_func; thd->where="field list"; + /* + To prevent fail on forward lookup we fill it with zerows, + then if we got pointer on zero after find_item_in_list we will know + that it is forward lookup. + + There is other way to solve problem: fill array with pointers to list, + but it will be slower. + + TODO: remove it when (if) we made one list for allfields and + ref_pointer_array + */ + if (ref_pointer_array) + bzero(ref_pointer_array, sizeof(Item *) * fields.elements); + Item **ref= ref_pointer_array; while ((item= it++)) { |