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-rw-r--r--mysql-test/t/ctype_cp850.test16
1 files changed, 16 insertions, 0 deletions
diff --git a/mysql-test/t/ctype_cp850.test b/mysql-test/t/ctype_cp850.test
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+--echo #
+--echo # Start of 5.5 tests
+--echo #
+
+--echo #
+--echo # MDEV-9862 Illegal mix of collation, when comparing column with CASE expression
+--echo #
+SET NAMES cp850;
+CREATE TABLE t1 (a CHAR(1) CHARACTER SET latin1);
+SELECT a FROM t1 WHERE CASE a WHEN 'aaaa' THEN 'Y' WHEN 'aaaa' THEN 'Y' ELSE NULL END <> a;
+DROP TABLE t1;
+
+
+--echo #
+--echo # End of 5.5 tests
+--echo #