MDEV-9662 Assertion `precision || !scale' failed in...

MDEV-9662 Assertion `precision || !scale' failed in my_decimal_precision_to_length_no_truncation(uint, uint8, bool)

The patch for MDEV-9745 earlier fixed the problem reported in MDEV-9662 as well.
Only adding tests.

mysql-test/include/ctype_numconv.inc

@@ -1794,6 +1794,12 @@ SELECT f1() FROM t1 LEFT JOIN (SELECT 1 AS a FROM t1 LIMIT 0) AS d ON 1 GROUP BY
 DROP FUNCTION f1;
 DROP TABLE t1;
 
+--echo #
+--echo # MDEV-9662 Assertion `precision || !scale' failed in my_decimal_precision_to_length_no_truncation(uint, uint8, bool)
+--echo #
+SELECT @@collation_connection;
+SELECT CASE 1 WHEN 2 THEN ( - '3' ) END;
+
 --echo #
 --echo # MDEV-5702 Incorrect results are returned with NULLIF()
 --echo #

mysql-test/r/ctype_binary.result

@@ -2849,6 +2849,15 @@ f1()
 DROP FUNCTION f1;
 DROP TABLE t1;
 #
+# MDEV-9662 Assertion `precision || !scale' failed in my_decimal_precision_to_length_no_truncation(uint, uint8, bool)
+#
+SELECT @@collation_connection;
+@@collation_connection
+binary
+SELECT CASE 1 WHEN 2 THEN ( - '3' ) END;
+CASE 1 WHEN 2 THEN ( - '3' ) END
+NULL
+#
 # MDEV-5702 Incorrect results are returned with NULLIF()
 #
 CREATE TABLE t1 (d DATE);

mysql-test/r/ctype_cp1251.result

@@ -3241,6 +3241,15 @@ f1()
 DROP FUNCTION f1;
 DROP TABLE t1;
 #
+# MDEV-9662 Assertion `precision || !scale' failed in my_decimal_precision_to_length_no_truncation(uint, uint8, bool)
+#
+SELECT @@collation_connection;
+@@collation_connection
+cp1251_general_ci
+SELECT CASE 1 WHEN 2 THEN ( - '3' ) END;
+CASE 1 WHEN 2 THEN ( - '3' ) END
+NULL
+#
 # MDEV-5702 Incorrect results are returned with NULLIF()
 #
 CREATE TABLE t1 (d DATE);

mysql-test/r/ctype_latin1.result

@@ -3423,6 +3423,15 @@ f1()
 DROP FUNCTION f1;
 DROP TABLE t1;
 #
+# MDEV-9662 Assertion `precision || !scale' failed in my_decimal_precision_to_length_no_truncation(uint, uint8, bool)
+#
+SELECT @@collation_connection;
+@@collation_connection
+latin1_swedish_ci
+SELECT CASE 1 WHEN 2 THEN ( - '3' ) END;
+CASE 1 WHEN 2 THEN ( - '3' ) END
+NULL
+#
 # MDEV-5702 Incorrect results are returned with NULLIF()
 #
 CREATE TABLE t1 (d DATE);

mysql-test/r/ctype_ucs.result

@@ -4239,6 +4239,15 @@ f1()
 DROP FUNCTION f1;
 DROP TABLE t1;
 #
+# MDEV-9662 Assertion `precision || !scale' failed in my_decimal_precision_to_length_no_truncation(uint, uint8, bool)
+#
+SELECT @@collation_connection;
+@@collation_connection
+ucs2_general_ci
+SELECT CASE 1 WHEN 2 THEN ( - '3' ) END;
+CASE 1 WHEN 2 THEN ( - '3' ) END
+NULL
+#
 # MDEV-5702 Incorrect results are returned with NULLIF()
 #
 CREATE TABLE t1 (d DATE);

mysql-test/r/ctype_utf8.result

@@ -5060,6 +5060,15 @@ f1()
 DROP FUNCTION f1;
 DROP TABLE t1;
 #
+# MDEV-9662 Assertion `precision || !scale' failed in my_decimal_precision_to_length_no_truncation(uint, uint8, bool)
+#
+SELECT @@collation_connection;
+@@collation_connection
+utf8_general_ci
+SELECT CASE 1 WHEN 2 THEN ( - '3' ) END;
+CASE 1 WHEN 2 THEN ( - '3' ) END
+NULL
+#
 # MDEV-5702 Incorrect results are returned with NULLIF()
 #
 CREATE TABLE t1 (d DATE);