CREATE TABLE t1 (
a varchar(32) character set utf8 collate utf8_bin NOT NULL,
b varchar(32) character set utf8 collate utf8_bin NOT NULL )
ENGINE=MyISAM DEFAULT CHARSET=utf8;
INSERT INTO t1 VALUES
('AAAAAAAAAA','AAAAAAAAAA'), ('AAAAAAAAAB','AAAAAAAAAB '),
('AAAAAAAAAB','AAAAAAAAAB'), ('AAAAAAAAAC','AAAAAAAAAC'),
('AAAAAAAAAD','AAAAAAAAAD'), ('AAAAAAAAAE','AAAAAAAAAE'),
('AAAAAAAAAF','AAAAAAAAAF'), ('AAAAAAAAAG','AAAAAAAAAG'),
('AAAAAAAAAH','AAAAAAAAAH'), ('AAAAAAAAAI','AAAAAAAAAI'),
('AAAAAAAAAJ','AAAAAAAAAJ'), ('AAAAAAAAAK','AAAAAAAAAK');
set tmp_table_size=1024;
SET @saved_dbug = @@SESSION.debug_dbug;
set session debug_dbug="+d,raise_error";
SELECT MAX(a) FROM t1 GROUP BY a,b;
ERROR 23000: Can't write; duplicate key in table '(temporary)'
set tmp_table_size=default;
DROP TABLE t1;
#
# Bug #50946: fast index creation still seems to copy the table
#
CREATE TABLE t1 (a INT(100) NOT NULL);
INSERT INTO t1 VALUES (1), (0), (2);
SET SESSION debug_dbug='+d,alter_table_only_index_change';
ALTER TABLE t1 ADD INDEX a(a);
SET debug_dbug= @saved_dbug;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(100) NOT NULL,
  KEY `a` (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
SELECT * FROM t1;
a
0
1
2
DROP TABLE t1;
#
# Bug#42064: low memory crash when importing hex strings, in Item_hex_string::Item_hex_string
#
CREATE TABLE t1(a BLOB);
SET SESSION debug_dbug="+d,bug42064_simulate_oom";
INSERT INTO t1 VALUES("");
Got one of the listed errors
SET debug_dbug= @saved_dbug;
DROP TABLE t1;
#
# Bug#41660: Sort-index_merge for non-first join table may require 
# O(#scans) memory
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (0), (1), (2), (3), (4), (5), (6), (7), (8), (9);
CREATE TABLE t2 (a INT, b INT, filler CHAR(100), KEY(a), KEY(b));
INSERT INTO t2 SELECT 1000, 1000, 'filler' FROM t1 A, t1 B, t1 C;
INSERT INTO t2 VALUES (1, 1, 'data');
# the example query uses LEFT JOIN only for the sake of being able to
# demonstrate the issue with a very small dataset. (left outer join 
# disables the use of join buffering, so we get the second table 
# re-scanned for every record in the outer table. if we used inner join,
# we would need to have thousands of records and/or more columns in both
# tables so that the join buffer is filled and re-scans are triggered).
SET @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch='outer_join_with_cache=off';
SET SESSION debug_dbug= '+d,only_one_Unique_may_be_created';
EXPLAIN
SELECT * FROM t1 LEFT JOIN t2 ON ( t2.a < 10 OR t2.b < 10 );
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
x	x	x	x	x	x	x	x	x	
x	x	x	x	x	x	x	x	x	Using sort_union(a,b); Using where
SELECT * FROM t1 LEFT JOIN t2 ON ( t2.a < 10 OR t2.b < 10 );
a	a	b	filler
0	1	1	data
1	1	1	data
2	1	1	data
3	1	1	data
4	1	1	data
5	1	1	data
6	1	1	data
7	1	1	data
8	1	1	data
9	1	1	data
SET debug_dbug= @saved_dbug;
SET optimizer_switch=@save_optimizer_switch;
DROP TABLE t1, t2;
#
# Bug#11747970 34660: CRASH WHEN FEDERATED TABLE LOSES CONNECTION DURING INSERT ... SELECT
#
CREATE TABLE t1(f1 INT, KEY(f1));
CREATE TABLE t2(f1 INT);
INSERT INTO t1 VALUES (1),(2);
INSERT INTO t2 VALUES (1),(2);
SET SESSION debug_dbug="+d,bug11747970_raise_error";
INSERT IGNORE INTO t2 SELECT f1 FROM t1 a WHERE NOT EXISTS (SELECT 1 FROM t2 b WHERE a.f1 = b.f1);
ERROR 70100: Query execution was interrupted
SET debug_dbug= @saved_dbug;
DROP TABLE t1,t2;
#
# End of 5.1 tests
#
#
# BUG#11747548:DETECT ORPHAN TEMP-POOL FILES, AND HANDLE GRACEFULLY.
#
#Set up.
CREATE TABLE pid_table(pid_no INT);
CREATE TABLE t1 (a BLOB);
INSERT INTO t1 VALUES (1), (2);
#Create MYD and MYI files for intrinsic temp table.
LOAD DATA LOCAL INFILE 'pid_file' INTO TABLE pid_table;
#Reports an error since the temp file already exists.
SELECT a FROM t1 ORDER BY rand(1);
a
1
2
#With patch, the query executes successfully.
SELECT a FROM t1 ORDER BY rand(1);
a
1
2
#cleanup
DROP TABLE t1, pid_table;
#
# MDEV-12416 OOM in create_virtual_tmp_table() makes the server crash
#
CREATE FUNCTION f1(a INT) RETURNS INT RETURN a;
SET SESSION debug_dbug="+d,simulate_create_virtual_tmp_table_out_of_memory";
SELECT f1(1);
Got one of the listed errors
DROP FUNCTION f1;
SET debug_dbug= @saved_dbug;