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-rw-r--r--mysql-test/t/alter_table.test12
1 files changed, 12 insertions, 0 deletions
diff --git a/mysql-test/t/alter_table.test b/mysql-test/t/alter_table.test
index e46027ae8d9..66a4adc90fe 100644
--- a/mysql-test/t/alter_table.test
+++ b/mysql-test/t/alter_table.test
@@ -324,3 +324,15 @@ alter table t1 rename to `t1\\`;
rename table t1 to `t1\\`;
drop table t1;
+#
+# Bug #6479 ALTER TABLE ... changing charset fails for TEXT columns
+#
+# The column's character set was changed but the actual data was not
+# modified. In other words, the values were reinterpreted
+# as UTF8 instead of being converted.
+create table t1 (a text) character set koi8r;
+insert into t1 values (_koi8r'ΤΕΣΤ');
+select hex(a) from t1;
+alter table t1 convert to character set cp1251;
+select hex(a) from t1;
+drop table t1;