Commit 8204f690 authored by unknown's avatar unknown
Browse files

Bug #13323 

Select count(*) returned 2 on empty table where handler
used exact count


mysql-test/r/partition.result:
  New test case for Bug #13323
mysql-test/t/partition.test:
  New test case for Bug #13323
sql/ha_partition.cc:
  Fix for Bug #13323
parent a5b52c45

mysql-test/r/partition.result

+3 −0
Original line number Diff line number Diff line
@@ -5,6 +5,9 @@ b int not null, 
c int not null,

primary key(a,b))

partition by key (a);

select count(*) from t1;

count(*)

0

drop table t1;

CREATE TABLE t1 (

a int not null,

mysql-test/t/partition.test

+5 −0
Original line number Diff line number Diff line
@@ -18,6 +18,11 @@ c int not null, 
primary key(a,b))

partition by key (a);



#

# Bug 13323: Select count(*) on empty table returns 2

#

select count(*) from t1;



drop table t1;

#

# Partition by key no partition, list of fields

sql/ha_partition.cc

+9 −2
Original line number Diff line number Diff line
@@ -81,6 +81,9 @@ static handlerton partition_hton = { 
  NULL, /* recover */

  NULL, /* commit_by_xid */

  NULL, /* rollback_by_xid */

  NULL,

  NULL,

  NULL,

  HTON_NO_FLAGS

};
@@ -2305,9 +2308,13 @@ void ha_partition::info(uint flag) 
      if (file->check_time > check_time)

	check_time= file->check_time;

    } while (*(++file_array));

    if (records < 2)

    if (records < 2 &&

        m_table_flags & HA_NOT_EXACT_COUNT)

      records= 2;

    if (records > 0)

      mean_rec_length= (ulong) (data_file_length / records);

    else

      mean_rec_length= 1; //? What should we set here 

  }

  if (flag & HA_STATUS_CONST)

  {