Fixed table crash bug when updating row > 16M (Bug #2159)

myisam/mi_dynrec.c:
  Fixed table crash bug when updating row > 16M

1 files changed, 27 insertions, 0 deletions

diff --git a/mysql-test/r/myisam-blob.result b/mysql-test/r/myisam-blob.result
new file mode 100644
index 00000000000..743d4dac254
--- /dev/null
+++ b/mysql-test/r/myisam-blob.result
@@ -0,0 +1,27 @@
+drop table if exists t1;
+CREATE TABLE t1 (data LONGBLOB) ENGINE=myisam;
+INSERT INTO t1 (data) VALUES (NULL);
+UPDATE t1 set data=repeat('a',18*1024*1024);
+select length(data) from t1;
+length(data)
+18874368
+delete from t1 where left(data,1)='a';
+check table t1;
+Table	Op	Msg_type	Msg_text
+test.t1	check	status	OK
+truncate table t1;
+INSERT INTO t1 (data) VALUES (repeat('a',1*1024*1024));
+INSERT INTO t1 (data) VALUES (repeat('b',16*1024*1024-1024));
+delete from t1 where left(data,1)='b';
+check table t1;
+Table	Op	Msg_type	Msg_text
+test.t1	check	status	OK
+UPDATE t1 set data=repeat('c',17*1024*1024);
+check table t1;
+Table	Op	Msg_type	Msg_text
+test.t1	check	status	OK
+delete from t1 where left(data,1)='c';
+check table t1;
+Table	Op	Msg_type	Msg_text
+test.t1	check	status	OK
+drop table t1;