Commit b9f94a91 authored by unknown's avatar unknown
Browse files

Merge mysql.com:/home/timka/mysql/src/5.0-virgin 

into  mysql.com:/home/timka/mysql/src/5.0-bug-12672
parents de5f0f2b 94c6c039

mysql-test/r/group_min_max.result

+20 −0
Original line number Diff line number Diff line
@@ -1972,6 +1972,26 @@ a 
b

c

d

create table bug12672 (

pk_col int auto_increment primary key, a1 char(64), a2 char(64), b char(16), c char(16) not null, d char(16), dummy char(64) default ' '

) engine=innodb;

insert into bug12672 (a1, a2, b, c, d, dummy) select * from t1;

create index idx12672_0 on bug12672 (a1);

create index idx12672_1 on bug12672 (a1,a2,b,c);

create index idx12672_2 on bug12672 (a1,a2,b);

analyze table t1;

Table	Op	Msg_type	Msg_text

test.t1	analyze	status	Table is already up to date

explain select distinct a1 from bug12672 where pk_col not in (1,2,3,4);

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

1	SIMPLE	bug12672	range	PRIMARY	PRIMARY	4	NULL	93	Using where; Using temporary

select distinct a1 from bug12672 where pk_col not in (1,2,3,4);

a1

a

b

c

d

drop table bug12672;

drop table t1;

drop table t2;

drop table t3;

mysql-test/t/group_min_max.test

+19 −0
Original line number Diff line number Diff line
@@ -651,6 +651,25 @@ select a1 from t1 where a2 = 'b' group by a1; 
explain select distinct a1 from t1 where a2 = 'b';

select distinct a1 from t1 where a2 = 'b';



#

# Bug #12672: primary key implcitly included in every innodb index

#



create table bug12672 (

  pk_col int auto_increment primary key, a1 char(64), a2 char(64), b char(16), c char(16) not null, d char(16), dummy char(64) default ' '

) engine=innodb;



insert into bug12672 (a1, a2, b, c, d, dummy) select * from t1;



create index idx12672_0 on bug12672 (a1);

create index idx12672_1 on bug12672 (a1,a2,b,c);

create index idx12672_2 on bug12672 (a1,a2,b);

analyze table t1;



explain select distinct a1 from bug12672 where pk_col not in (1,2,3,4);

select distinct a1 from bug12672 where pk_col not in (1,2,3,4);



drop table bug12672;



drop table t1;

drop table t2;

sql/opt_range.cc

+40 −0
Original line number Diff line number Diff line
@@ -7016,6 +7016,7 @@ get_best_group_min_max(PARAM *param, SEL_TREE *tree) 
  ha_rows cur_quick_prefix_records= 0;

  uint cur_param_idx;

  key_map cur_used_key_parts;

  uint pk= param->table->s->primary_key;



  for (uint cur_index= 0 ; cur_index_info != cur_index_info_end ;

       cur_index_info++, cur_index++)
@@ -7024,6 +7025,45 @@ get_best_group_min_max(PARAM *param, SEL_TREE *tree) 
    if (!table->used_keys.is_set(cur_index))

      goto next_index;



    /*

      If the current storage manager is such that it appends the primary key to

      each index, then the above condition is insufficient to check if the

      index is covering. In such cases it may happen that some fields are

      covered by the PK index, but not by the current index. Since we can't

      use the concatenation of both indexes for index lookup, such an index

      does not qualify as covering in our case. If this is the case, below

      we check that all query fields are indeed covered by 'cur_index'.

    */

    if (pk < MAX_KEY && cur_index != pk &&

        (table->file->table_flags() & HA_PRIMARY_KEY_IN_READ_INDEX))

    {

      /* For each table field */

      for (uint i= 0; i < table->s->fields; i++)

      {

        Field *cur_field= table->field[i];

        /*

          If the field is used in the current query, check that the

          field is covered by some keypart of the current index.

        */

        if (thd->query_id == cur_field->query_id)

        {

          bool is_covered= FALSE;

          KEY_PART_INFO *key_part= cur_index_info->key_part;

          KEY_PART_INFO *key_part_end= key_part + cur_index_info->key_parts;

          for (; key_part != key_part_end ; key_part++)

          {

            if (key_part->field == cur_field)

            {

              is_covered= TRUE;

              break;

            }

          }

          if (!is_covered)

            goto next_index;

        }

      }

    }



    /*

      Check (GA1) for GROUP BY queries.

    */