Details
- 
    Bug 
- 
    Status: Stalled (View Workflow)
- 
    Critical 
- 
    Resolution: Unresolved
- 
    None
- 
    None
- 
    None
- 
        Q4/2025 Server Maintenance, Q1/2026 Server Maintenance
Description
Fast >= 11.4 server analysis shows that Select handler is not called in case of multi-table update/deletes thus MCS DELETE/UPDATE pipeline that relied on this got broken.
Consider scenario from MCOL issue attached below.
Here is a log for ES 11.4. The linked MCOL has a scenario for ES 10.6 that doesn't have this issue.
| MariaDB [tpch1]> create table product_tag (product_id bigint)engine=columnstore; | 
| Query OK, 0 rows affected (0.454 sec) | 
|   | 
| MariaDB [tpch1]> CREATE TABLE `product` ( | 
|     -> `product_id` bigint(20) DEFAULT NULL, | 
|     -> `price` bigint(20) DEFAULT NULL, | 
|     -> `short_description` varchar(7998) DEFAULT NULL, | 
|     -> `brand` varchar(254) DEFAULT NULL, | 
|     -> `modified_dtm` datetime DEFAULT NULL, | 
|     -> `created_dtm` datetime DEFAULT NULL, | 
|     -> `modified_by` int(11) DEFAULT NULL | 
|     -> ) engine=columnstore DEFAULT CHARSET=latin1 ; | 
| Query OK, 0 rows affected (0.229 sec) | 
|   | 
| MariaDB [tpch1]> insert into product_tag values (1),(2),(3),(4); | 
| Query OK, 4 rows affected (0.286 sec) | 
| Records: 4  Duplicates: 0  Warnings: 0 | 
|   | 
| MariaDB [tpch1]> insert into product values (1,22,'fes','rets','2011-12-12 12:12:12','2011-12-13 1:1:10',343); | 
| Query OK, 1 row affected (0.201 sec) | 
|   | 
| MariaDB [tpch1]> insert into product values (3,22,'fes','rets','2011-12-12 12:12:12','2011-12-13 1:1:10',343); | 
| Query OK, 1 row affected (0.134 sec) | 
|   | 
| MariaDB [tpch1]> select * from product; | 
| +------------+-------+-------------------+-------+--------------+-------------+-------------+ | 
| | product_id | price | short_description | brand | modified_dtm | created_dtm | modified_by | | 
| +------------+-------+-------------------+-------+--------------+-------------+-------------+ | 
| |          1 |    22 | fes               | rets  | 2011-12-12 12:12:12 | 2011-12-13 01:01:10 |         343 | | 
| |          3 |    22 | fes               | rets  | 2011-12-12 12:12:12 | 2011-12-13 01:01:10 |         343 | | 
| +------------+-------+-------------------+-------+--------------+-------------+-------------+ | 
| 2 rows in set (0.131 sec) | 
|   | 
| MariaDB [tpch1]> update | 
|     -> product p join | 
|     -> (select product_id from product_tag limit 1000) t using (product_id) | 
|     -> set brand=p.product_id, price=555, modified_dtm='2011-12-15 15:15:30', | 
|     -> short_description=concat(short_description,modified_by); | 
| Query OK, 0 rows affected (0.029 sec) | 
| Rows matched: 0  Changed: 0  Warnings: 0 | 
|   | 
| MariaDB [tpch1]> select * from product; | 
| +------------+-------+-------------------+-------+--------------+-------------+-------------+ | 
| | product_id | price | short_description | brand | modified_dtm | created_dtm | modified_by | | 
| +------------+-------+-------------------+-------+--------------+-------------+-------------+ | 
| |          1 |    22 | fes               | rets  | 2011-12-12 12:12:12 | 2011-12-13 01:01:10 |         343 | | 
| |          3 |    22 | fes               | rets  | 2011-12-12 12:12:12 | 2011-12-13 01:01:10 |         343 | | 
| +------------+-------+-------------------+-------+--------------+-------------+-------------+ | 
| 2 rows in set (0.007 sec)
 |