MDEV-20303 SPACE(-1) returns a wrong data type

1 files changed, 68 insertions, 0 deletions

diff --git a/mysql-test/main/func_str.result b/mysql-test/main/func_str.result
index eb00837eaaf..2d86d384288 100644
--- a/mysql-test/main/func_str.result
+++ b/mysql-test/main/func_str.result
@@ -5073,16 +5073,84 @@ DROP TABLE t1;
 CREATE OR REPLACE TABLE t1 (i BIGINT);
 INSERT INTO t1 VALUES (42);
 CREATE OR REPLACE TABLE t2 AS SELECT
+REPEAT(i,NULL) AS cn,
 REPEAT(i,0) AS c0,
 REPEAT(i,-1) AS c1
 FROM t1;
 SHOW CREATE TABLE t2;
 Table	Create Table
 t2	CREATE TABLE `t2` (
+  `cn` char(0) CHARACTER SET utf8 DEFAULT NULL,
   `c0` char(0) CHARACTER SET utf8 DEFAULT NULL,
   `c1` char(0) CHARACTER SET utf8 DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 DROP TABLE t1, t2;
 #
+# MDEV-20303 SPACE(-1) returns a wrong data type
+#
+CREATE TABLE t1 (i BIGINT);
+INSERT INTO t1 VALUES (42);
+CREATE TABLE t2 AS SELECT
+SPACE(NULL) AS cn,
+SPACE(0) AS c0,
+SPACE(-1) AS c1
+FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `cn` char(0) CHARACTER SET utf8 DEFAULT NULL,
+  `c0` char(0) CHARACTER SET utf8 DEFAULT NULL,
+  `c1` char(0) CHARACTER SET utf8 DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t1, t2;
+CREATE TABLE t1 (i BIGINT);
+INSERT INTO t1 VALUES (42);
+CREATE TABLE t2 AS SELECT
+LPAD(i,NULL,'a') AS cn,
+LPAD(i,0,'a') AS c0,
+LPAD(i,-1,'a') AS c1
+FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `cn` char(0) CHARACTER SET utf8 DEFAULT NULL,
+  `c0` char(0) CHARACTER SET utf8 DEFAULT NULL,
+  `c1` char(0) CHARACTER SET utf8 DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t1, t2;
+CREATE TABLE t1 (i BIGINT);
+INSERT INTO t1 VALUES (42);
+CREATE TABLE t2 AS SELECT
+RPAD(i,NULL,'a') AS cn,
+RPAD(i,0,'a') AS c0,
+RPAD(i,-1,'a') AS c1
+FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `cn` char(0) CHARACTER SET utf8 DEFAULT NULL,
+  `c0` char(0) CHARACTER SET utf8 DEFAULT NULL,
+  `c1` char(0) CHARACTER SET utf8 DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DROP TABLE t1, t2;
+CREATE TABLE t1 (i BIGINT);
+INSERT INTO t1 VALUES (42);
+CREATE TABLE t2 AS SELECT
+LEFT(i,NULL) AS cn,
+LEFT(i,0) AS c0,
+LEFT(i,18446744073709551615) AS c1
+FROM t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `cn` char(0) CHARACTER SET utf8 DEFAULT NULL,
+  `c0` char(0) CHARACTER SET utf8 DEFAULT NULL,
+  `c1` varchar(20) CHARACTER SET utf8 DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT c1 FROM t2;
+c1
+42
+DROP TABLE t1, t2;
+#
 # End of 10.3 tests
 #