database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-29 05:21:33 +03:00
Code Activity

MDEV-24387: Wrong number of decimal digits in certain UNION/Subqery

Browse Source 
constellation

Analysis: The decimals is set to NOT_FIXED_DEC for Field_str even if it is
NULL. Unsigned has decimals=0. So Type_std_attributes::decimals is set to 39
(maximum between 0 and 39). This results in incorrect number of decimals
when we have union of unsigned and NULL type.

Fix: Check if the field is created from NULL value. If yes, set decimals to 0
otherwise set it to NOT_FIXED_DEC.
This commit is contained in:
Rucha Deodhar
2021-01-12 13:31:57 +05:30
parent 59998d3480
commit fb9a9599bc
3 changed files with 53 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
mysql-test/main/union.test
View File

@ -1855,6 +1855,24 @@ select * from t1 where a > 4;
drop table t1,t2,t3;
--echo #
--echo # MDEV-24387: Wrong number of decimal digits in certain UNION/Subqery
--echo # constellation
--echo #
--disable_ps_protocol
--enable_metadata
SELECT CAST(1 AS UNSIGNED) UNION ALL SELECT * from (SELECT NULL) t;
SELECT CAST(1 AS SIGNED) UNION ALL SELECT * from (SELECT NULL) t;
SELECT CAST(1 AS SIGNED) UNION ALL SELECT * from (SELECT CAST(1 AS UNSIGNED)) t;
SELECT CAST(1 AS UNSIGNED) UNION ALL SELECT NULL;
SELECT CAST(1 AS UNSIGNED) UNION ALL SELECT CAST(1 AS SIGNED);
--disable_metadata
--enable_ps_protocol
--echo #
--echo # End of 10.3 tests
--echo #