[FLINK-36813][cdc-connectors][mysql] support mysql sync part columns #3767
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Background
In some scenarios, MySQL synchronization only expects to synchronize specified fields instead of all fields in the table.
Current situation
For the incremental stage, you only need to configure the column.include.list property of debezium to support the synchronization of some fields in the incremental stage, refer to: https://debezium.io/documentation/reference/1.9/connectors/mysql.html#mysql-property-column-include-list
For the full snapshot stage, * is currently used in MySqlSnapshotSplitReadTask, refer to
Solution
We can refer to debezium RelationalSnapshotChangeEventSource, The user configures column.include.list, and then captures the specific columns in MySqlSnapshotSplitReadTask, and splices them when constructing Scan SQL.