Bug #30878: Crashing when alter an auto_increment non partitioned

  table to partitioned

Problem:
Crashed because usage of an uninitialised mutex when auto_incrementing
  a partitioned temporary table

Fix:
Only locking (using the mutex) if not temporary table.


mysql-test/r/partition.result:
  Bug #30878: Crashing when alter an auto_increment non partitioned
    table to partitioned
  test result
mysql-test/t/partition.test:
  Bug #30878: Crashing when alter an auto_increment non partitioned
    table to partitioned
  testcase
sql/ha_partition.cc:
  Bug #30878: Crashing when alter an auto_increment non partitioned
    table to partitioned
  
  If the table is a temporary table, the table_share->mutex is not
    initialised.
  
  Checking if not temporary table, then OK to lock (else no need
    to lock)

1 files changed, 12 insertions, 0 deletions

diff --git a/mysql-test/r/partition.result b/mysql-test/r/partition.result
index f90f3b07d70..753a2e31632 100644
--- a/mysql-test/r/partition.result
+++ b/mysql-test/r/partition.result
@@ -1,4 +1,16 @@
 drop table if exists t1;
+create table t1 (id int auto_increment, s1 int, primary key (id));
+insert into t1 values (null,1);
+insert into t1 values (null,6);
+select * from t1;
+id	s1
+1	1
+2	6
+alter table t1 partition by range (id) (
+partition p0 values less than (3),
+partition p1 values less than maxvalue
+);
+drop table t1;
 create table t1 (a int)
 partition by key(a)
 partitions 0.2+e1;