1 files changed, 127 insertions, 0 deletions
diff --git a/mysql-test/t/union.test b/mysql-test/t/union.test
index 04ab71588be..ce8b2bc9c2a 100644
--- a/mysql-test/t/union.test
+++ b/mysql-test/t/union.test
@@ -1545,5 +1545,132 @@ SHOW CREATE TABLE t1;
 DROP TABLE t1;
 
 --echo #
+--echo # MDEV-9495 Wrong field type for a UNION of a signed and an unsigned INT expression
+--echo #
+CREATE TABLE t1 (a INT, b INT UNSIGNED);
+INSERT INTO t1 VALUES (0x7FFFFFFF,0xFFFFFFFF);
+CREATE TABLE t2 AS SELECT a FROM t1 UNION SELECT b FROM t1;
+SHOW CREATE TABLE t2;
+SELECT * FROM t2 ORDER BY a;
+DROP TABLE t2;
+CREATE TABLE t2 AS SELECT COALESCE(a,b), COALESCE(b,a) FROM t1;
+SHOW CREATE TABLE t2;
+SELECT * FROM t2;
+DROP TABLE t2;
+DROP TABLE t1;
+
+--echo #
+--echo # MDEV-9497 UNION and COALESCE produce different field types for DECIMAL+INT
+--echo #
+CREATE TABLE t1 AS SELECT COALESCE(10.1,CAST(10 AS UNSIGNED)) AS a;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+CREATE OR REPLACE TABLE t1 AS SELECT 10.1 AS a UNION SELECT CAST(10 AS UNSIGNED);
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
+--echo #
+--echo # MDEV-12594 UNION between fixed length double columns does not always preserve scale
+--echo #
+CREATE TABLE t1 (a FLOAT(20,4), b FLOAT(20,3), c FLOAT(20,4));
+INSERT INTO t1 VALUES (1111,2222,3333);
+
+CREATE TABLE t2 AS SELECT a FROM t1 UNION SELECT a FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+
+CREATE OR REPLACE TABLE t2 SELECT a FROM t1 UNION SELECT c FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+
+CREATE OR REPLACE TABLE t2 SELECT b FROM t1 UNION SELECT b FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+
+CREATE OR REPLACE TABLE t2 SELECT c FROM t1 UNION SELECT c FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+
+CREATE OR REPLACE TABLE t2 SELECT c FROM t1 UNION SELECT a FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+
+CREATE OR REPLACE TABLE t2 AS SELECT a FROM t1 UNION SELECT b FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+
+CREATE OR REPLACE TABLE t2 AS SELECT b FROM t1 UNION SELECT a FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+
+DROP TABLE t1;
+
+--echo # Corner case
+CREATE TABLE t1 (a FLOAT(255,4), b FLOAT(255,3));
+INSERT INTO t1 VALUES (1111,2222);
+CREATE OR REPLACE TABLE t2 AS SELECT b FROM t1 UNION SELECT a FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+DROP TABLE t1;
+
+
+--echo #
+--echo # MDEV-12595 UNION converts INT to BIGINT
+--echo #
+CREATE TABLE t1 AS SELECT
+  1,
+  -1,
+  COALESCE(1,1),
+  COALESCE(-1,-1),
+  COALESCE(1,-1),
+  COALESCE(-1,1);
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+CREATE TABLE t1 AS SELECT 1 AS c1,1 AS c2,-1 AS c3,-1 AS c4 UNION SELECT 1,-1,1,-1;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
+
+--echo #
+--echo # MDEV-12599 UNION is not symmetric when mixing INT and CHAR
+--echo #
+
+CREATE OR REPLACE TABLE t1 AS SELECT 1 AS c1, 'a' AS c2 UNION SELECT 'a', 1;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
+CREATE OR REPLACE TABLE t1 AS SELECT 11112222 AS c1, 'a' AS c2 UNION SELECT 'a', 11112222;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
+
+CREATE OR REPLACE TABLE t1 AS SELECT 111122223333 AS c1, 'a' AS c2 UNION SELECT 'a', 111122223333;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
+CREATE OR REPLACE TABLE t1 AS SELECT 1111222233334444 AS c1, 'a' AS c2 UNION SELECT 'a', 1111222233334444;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
+CREATE TABLE t1 (a INT(3), b VARCHAR(1));
+CREATE TABLE t2 AS SELECT a,b FROM t1 UNION SELECT b,a FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+DROP TABLE t1;
+
+CREATE TABLE t1 (a BIGINT(3), b VARCHAR(1));
+CREATE TABLE t2 AS SELECT a,b FROM t1 UNION SELECT b,a FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+DROP TABLE t1;
+
+CREATE TABLE t1 (a BIGINT(12), b VARCHAR(1));
+CREATE TABLE t2 AS SELECT a,b FROM t1 UNION SELECT b,a FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+DROP TABLE t1;
+
+
+--echo #
 --echo # End of 10.3 tests
 --echo #