1 files changed, 34 insertions, 0 deletions
diff --git a/mysql-test/main/union.result b/mysql-test/main/union.result
index ef3aed397ba..52bc3ccb0dc 100644
--- a/mysql-test/main/union.result
+++ b/mysql-test/main/union.result
@@ -2616,5 +2616,39 @@ Warnings:
 Note	1003	/* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where `test`.`t2`.`a` < 5 except /* select#2 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where `test`.`t3`.`a` < 5 union all /* select#3 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` > 4
 drop table t1,t2,t3;
 #
+# MDEV-24387: Wrong number of decimal digits in certain UNION/Subqery
+#             constellation
+#
+SELECT CAST(1 AS UNSIGNED) UNION ALL SELECT * from (SELECT NULL) t;
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def					CAST(1 AS UNSIGNED)	246	2	1	Y	32896	0	63
+CAST(1 AS UNSIGNED)
+1
+NULL
+SELECT CAST(1 AS SIGNED) UNION ALL SELECT * from (SELECT NULL) t;
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def					CAST(1 AS SIGNED)	3	2	1	Y	32896	0	63
+CAST(1 AS SIGNED)
+1
+NULL
+SELECT CAST(1 AS SIGNED) UNION ALL SELECT * from (SELECT CAST(1 AS UNSIGNED)) t;
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def					CAST(1 AS SIGNED)	246	11	1	N	32897	0	63
+CAST(1 AS SIGNED)
+1
+1
+SELECT CAST(1 AS UNSIGNED) UNION ALL SELECT NULL;
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def					CAST(1 AS UNSIGNED)	246	2	1	Y	32896	0	63
+CAST(1 AS UNSIGNED)
+1
+NULL
+SELECT CAST(1 AS UNSIGNED) UNION ALL SELECT CAST(1 AS SIGNED);
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def					CAST(1 AS UNSIGNED)	246	2	1	N	32897	0	63
+CAST(1 AS UNSIGNED)
+1
+1
+#
 # End of 10.3 tests
 #