Commit aa475d48 authored by unknown's avatar unknown
Browse files

BUG#20583: index_last causes crash when performed on single partition 


mysql-test/r/partition.result:
  New test case
mysql-test/t/partition.test:
  New test case
sql/ha_partition.cc:
  Ensure index_last always uses ordered index scan
parent 767cb0b4

mysql-test/r/partition.result

+8 −0
Original line number Diff line number Diff line
@@ -1043,4 +1043,12 @@ alter table t1 add partition (partition p2 values in (3)); 
alter table t1 drop partition p2;

use test;

drop database db99;

create table t1 (a int, index(a))

partition by hash(a);

insert into t1 values (1),(2);

select * from t1 ORDER BY a DESC;

a

2

1

drop table t1;

End of 5.1 tests

mysql-test/t/partition.test

+9 −0
Original line number Diff line number Diff line
@@ -1199,4 +1199,13 @@ alter table t1 drop partition p2; 
use test;

drop database db99;



#

# Bug 20583 Partitions: Crash using index_last

#

create table t1 (a int, index(a))

partition by hash(a);

insert into t1 values (1),(2);

select * from t1 ORDER BY a DESC;

drop table t1;



--echo End of 5.1 tests

sql/ha_partition.cc

+2 −1
Original line number Diff line number Diff line
@@ -3399,7 +3399,8 @@ int ha_partition::common_first_last(byte *buf) 


  if ((error= partition_scan_set_up(buf, FALSE)))

    return error;

  if (!m_ordered_scan_ongoing)

  if (!m_ordered_scan_ongoing &&

      m_index_scan_type != partition_index_last)

    return handle_unordered_scan_next_partition(buf);

  return handle_ordered_index_scan(buf);

}