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ddl_puller (ticdc): handle dorp pk/uk ddl correctly (#10965) #10981

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This is an automated cherry-pick of #10965

What problem does this PR solve?

Issue Number: close #10890

What is changed and how it works?

When handling a DDL job in ddlPuller, check if it will transition the table from eligible to ineligible. If so, return an error and stop the changefeed. The error message should provide instructions for the user on how to manage the situation.

Check List

Tests

  • Unit test
  • Manual test (add detailed scripts or steps below)
  1. Create a table t1.
CREATE TABLE t1 (
id INT PRIMARY KEY /*T![clustered_index] NONCLUSTERED */,
name VARCHAR(255),
email VARCHAR(255) UNIQUE
);
  1. Drop its primary key.
ALTER TABLE t1 DROP PRIMARY KEY; 
  1. List this changefeed.
-> # ./cdc cli changefeed list 
[
  {
    "id": "test",
    "namespace": "default",
    "summary": {
      "state": "warning",
      "tso": 449299724779651075,
      "checkpoint": "2024-04-24 15:07:11.563",
      "error": {
        "time": "2024-04-24T16:52:17.129593307+08:00",
        "addr": "127.0.0.1:8300",
        "code": "CDC:ErrProcessorUnknown",
        "message": "An eligible table become ineligible after DDL: [alter table t1 drop primary key] it is a dangerous operation. If you want to replicate this ddl, pelase pause the changefeed and update the `force-replicate=true` in the changefeed configuration, then resume the changefeed. Otherwise, will cause data loss."
      }
    }
  }
]
  1. Update the changefeed's config as the instructions in the error message and resume the changefeed. Check the CDC log to confirm if the DDL was replicated.
[2024/04/24 16:55:09.679 +08:00] [INFO] [ddl_manager.go:558] ["execute a ddl event successfully"] [ddl="ALTER TABLE `t1` DROP PRIMARY KEY"] [namespace=default] [changefeed=test] ....

Questions

Will it cause performance regression or break compatibility?
Do you need to update user documentation, design documentation or monitoring documentation?

Release note

Fix a bug that might cause the replication of the 'drop primary key' or 'drop unique key' DDL to be lost.

Signed-off-by: ti-chi-bot <ti-community-prow-bot@tidb.io>
@ti-chi-bot ti-chi-bot added lgtm release-note Denotes a PR that will be considered when it comes time to generate release notes. size/L Denotes a PR that changes 100-499 lines, ignoring generated files. type/cherry-pick-for-release-6.5 This PR is cherry-picked to release-6.5 from a source PR. labels Apr 25, 2024
@ti-chi-bot ti-chi-bot bot added do-not-merge/cherry-pick-not-approved size/XL Denotes a PR that changes 500-999 lines, ignoring generated files. and removed size/L Denotes a PR that changes 100-499 lines, ignoring generated files. labels Apr 25, 2024
@ti-chi-bot ti-chi-bot added the cherry-pick-approved Cherry pick PR approved by release team. label May 7, 2024
Signed-off-by: dongmen <414110582@qq.com>
@ti-chi-bot ti-chi-bot bot added size/L Denotes a PR that changes 100-499 lines, ignoring generated files. and removed size/XL Denotes a PR that changes 500-999 lines, ignoring generated files. labels Jun 10, 2024
Signed-off-by: dongmen <414110582@qq.com>
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ti-chi-bot bot commented Jun 10, 2024

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: asddongmen

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@ti-chi-bot ti-chi-bot bot added the approved label Jun 10, 2024
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/retest

@ti-chi-bot ti-chi-bot bot merged commit d82ae89 into pingcap:release-6.5 Jun 10, 2024
9 of 10 checks passed
hicqu added a commit to ti-chi-bot/tiflow that referenced this pull request Jun 12, 2024
commit c092599
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Wed Jun 12 00:26:59 2024 +0800

    pkg/config, sink(ticdc): support output raw change event for mq and cloud storage sink (pingcap#11226) (pingcap#11290)

    close pingcap#11211

commit 3426e46
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Tue Jun 11 19:40:29 2024 +0800

    puller(ticdc): fix wrong update splitting behavior after table scheduling (pingcap#11269) (pingcap#11282)

    close pingcap#11219

commit 2a28078
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Tue Jun 11 16:40:37 2024 +0800

    mysql(ticdc): remove error filter when check isTiDB in backend init (pingcap#11214) (pingcap#11261)

    close pingcap#11213

commit 2425d54
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Tue Jun 11 16:40:30 2024 +0800

    log(ticdc): Add more error query information to the returned error to facilitate users to know the cause of the failure (pingcap#10945) (pingcap#11257)

    close pingcap#11254

commit 053cdaf
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Tue Jun 11 15:34:30 2024 +0800

    cdc: log slow conflict detect every 60s (pingcap#11251) (pingcap#11287)

    close pingcap#11271

commit 327ba7b
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Tue Jun 11 11:42:00 2024 +0800

    redo(ticdc): return internal error in redo writer (pingcap#11011) (pingcap#11091)

    close pingcap#10124

commit d82ae89
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Mon Jun 10 22:28:29 2024 +0800

    ddl_puller (ticdc): handle dorp pk/uk ddl correctly (pingcap#10965) (pingcap#10981)

    close pingcap#10890

commit f15bec9
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Fri Jun 7 16:16:28 2024 +0800

    redo(ticdc): enable pprof and set memory limit for redo applier (pingcap#10904) (pingcap#10996)

    close pingcap#10900

commit ba50a0e
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Wed Jun 5 19:58:26 2024 +0800

    test(ticdc): enable sequence test (pingcap#11023) (pingcap#11037)

    close pingcap#11015

commit 94b9897
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Wed Jun 5 17:08:56 2024 +0800

    mounter(ticdc): timezone fill default value should also consider tz. (pingcap#10932) (pingcap#10946)

    close pingcap#10931

commit a912d33
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Wed Jun 5 10:49:25 2024 +0800

    mysql (ticdc): Improve the performance of the mysql sink by refining the transaction event batching logic (pingcap#10466) (pingcap#11242)

    close pingcap#11241

commit 6277d9a
Author: dongmen <20351731+asddongmen@users.noreply.github.com>
Date:   Wed May 29 20:13:22 2024 +0800

    kvClient (ticdc): revert e5999e3 to remove useless metrics (pingcap#11184)

    close pingcap#11073

commit 54e93ed
Author: dongmen <20351731+asddongmen@users.noreply.github.com>
Date:   Wed May 29 17:43:22 2024 +0800

    syncpoint (ticdc): make syncpoint support base64 encoded password (pingcap#11162)

    close pingcap#10516

commit 0ba9329
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Wed May 29 09:07:21 2024 +0800

    (redo)ticdc: fix the event orderliness in redo log (pingcap#11117) (pingcap#11180)

    close pingcap#11096

Signed-off-by: qupeng <qupeng@pingcap.com>
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2 participants