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-rw-r--r--mysql-test/main/func_str.test11
1 files changed, 11 insertions, 0 deletions
diff --git a/mysql-test/main/func_str.test b/mysql-test/main/func_str.test
index a01b3942209..ba5b671ca4f 100644
--- a/mysql-test/main/func_str.test
+++ b/mysql-test/main/func_str.test
@@ -2100,6 +2100,17 @@ DROP TABLE t1, t2;
--echo #
--echo #
+--echo # MDEV-21841 CONV() function truncates the result type to 21 symbol.
+--echo #
+
+CREATE TABLE t1(i BIGINT);
+INSERT INTO t1 VALUES (-1);
+CREATE TABLE t2 AS SELECT conv(i,16,2) from t1;
+SELECT * FROM t2;
+SHOW CREATE TABLE t2;
+DROP TABLE t1,t2;
+
+--echo #
--echo # MDEV-18205 Assertion `str_length < len' failed in Binary_string::realloc_raw
--echo #