eventFilter incorrectly affects update events

[wk989898]

What did you do?

1. create a changefeed with config

[filter]
rules = ['test.*']
[[filter.event-filters]]
matcher = ['test.t'] 
ignore-event = ["delete"] # filter out delete event of table `test.t` 

2. run sql

create table t (a int primary key);
insert into t values (1),(2);
update t set a = 3 where a = 1;

What did you expect to see?

data should be equivalent

What did you see instead?

The following tables contains inconsistent data

+------------+---------+--------------------+----------------+---------+-----------+
|   TABLE    | RESULT  | STRUCTURE EQUALITY | DATA DIFF ROWS | UPCOUNT | DOWNCOUNT |
+------------+---------+--------------------+----------------+---------+-----------+
| `test`.`t` | succeed | true               | +0/-1          |       2 |         3 |
+------------+---------+--------------------+----------------+---------+-----------+

fix sql:

DELETE FROM `test`.`t` WHERE `a` = 1 LIMIT 1;

Versions of the cluster

Upstream TiDB cluster version (execute SELECT tidb_version(); in a MySQL client):

(paste TiDB cluster version here)

Upstream TiKV version (execute tikv-server --version):

(paste TiKV version here)

TiCDC version (execute cdc version):

master