MySQL Bugs: #6139: UNION doesn't understand collate in the column of second select

Bug #6139	UNION doesn't understand collate in the column of second select
Submitted:	18 Oct 2004 10:50	Modified:	18 Oct 2004 13:00
Reporter:	Victor Vagin	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server	Severity:	S3 (Non-critical)
Version:	4.1	OS:
Assigned to:	Alexander Barkov	CPU Architecture:	Any

Description:
UNION doesn't understand collate in the column of second select

How to repeat:
mysql> (select _utf8"test" collate utf8_bin) union (select _utf8"TEST") union (select _utf8"TeST");
+------------------------------+
| _utf8"test" collate utf8_bin |
+------------------------------+
| test                         |
| TEST                         |
| TeST                         |
+------------------------------+
3 rows in set (0.05 sec)

mysql> (select _utf8"test") union (select _utf8"TEST"  collate utf8_bin) union (select _utf8"TeST");
+------+
| test |
+------+
| test |
+------+
1 row in set (0.01 sec)

Suggested fix:
I want mysql to give the same result for the second query as for the first query

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