cdc/codec: fix nil value in canal codec. (#4741)#4745

Merged

ti-chi-bot merged 5 commits intopingcap:release-5.4from ti-chi-bot:cherry-pick-4741-to-release-5.4

Apr 27, 2022

+52-15

Commits on Mar 2, 2022

This is an automated cherry-pick of pingcap#4741

3AceShowHand
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ti-chi-bot
committed

Commits on Apr 11, 2022

Commits on Apr 27, 2022

Merge branch 'release-5.4' into cherry-pick-4741-to-release-5.4
3AceShowHand
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