[oceanbase] fix regex for change events

[whhe]

fnmatch is used to match pattern of change events, while regex is used for snapshot reading.

In this pr, I make the log client to fetch all the data at first and do filter with regex in the process part.

[whhe]

Please help review this pr when you are available. @leonardBang @GOODBOY008 @Jiabao-Sun

The ci failure is not related to my modification.

[Jiabao-Sun]

Thanks @whhe for the excellent work to push this feature forward.

From my point of view, I think we can do some optimizations mentioned in the comments, especially in the scenario of a single database or a single table.

In addition, using not fully qualified table regex does not seem to be able to partially filter the tables with same name but in different databases. Shall we use the fully qualified tableList like MySQL CDC connector?

CC @leonardBang

[whhe]

Thanks @whhe for the excellent work to push this feature forward.

From my point of view, I think we can do some optimizations mentioned in the comments, especially in the scenario of a single database or a single table.

In addition, using not fully qualified table regex does not seem to be able to partially filter the tables with same name but in different databases. Shall we use the fully qualified tableList like MySQL CDC connector?

CC @leonardBang

Thanks for your advice.

I used regex here at the beginning and so I keep it in this pr. And it make sense to use fully qualified table list, the monitor list can be more accurate in this way. I would change it asap.

[Jiabao-Sun]

Thanks @whhe. I left a few comments.

[whhe]

@Jiabao-Sun Docs updated, please take a look when you are available.

[Jiabao-Sun]

Thanks @whhe for the update.
Hi @leonardBang, do you have some suggestions?

[whhe]

@leonardBang Comments addressed. PTAL.

[leonardBang]

Thanks @whhe for the update, LGTM. Btw, the logic in OceanBaseRichSourceFunction is too long to read, we can split it in the future.