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# MDEV-6255 DUPLICATE KEY Errors on SELECT .. GROUP BY that uses temporary and filesort
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CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET cp1251 COLLATE cp1251_ukrainian_ci);
INSERT INTO t1 VALUES (0x20),(0x60),(0x6060),(0x606060);
SELECT HEX(a) FROM t1 WHERE a=0x60;
HEX(a)
20
60
6060
606060
ALTER TABLE t1  PARTITION BY KEY(a) PARTITIONS 3;
SELECT HEX(a) FROM t1 WHERE a=0x60;
HEX(a)
20
60
6060
606060
DROP TABLE t1;
CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET koi8u COLLATE koi8u_general_ci);
INSERT INTO t1 VALUES (0x20),(0x60),(0x6060),(0x606060);
SELECT HEX(a) FROM t1 WHERE a=0x60;
HEX(a)
20
60
6060
606060
ALTER TABLE t1  PARTITION BY KEY(a) PARTITIONS 3;
SELECT HEX(a) FROM t1 WHERE a=0x60;
HEX(a)
20
60
6060
606060
DROP TABLE t1;
CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET cp1250 COLLATE cp1250_general_ci);
INSERT INTO t1 VALUES (0x20),(0xA0),(0xA0A0),(0xA0A0A0);
SELECT HEX(a) FROM t1 WHERE a=0xA0;
HEX(a)
20
A0
A0A0
A0A0A0
ALTER TABLE t1  PARTITION BY KEY(a) PARTITIONS 3;
SELECT HEX(a) FROM t1 WHERE a=0xA0;
HEX(a)
20
A0
A0A0
A0A0A0
DROP TABLE t1;