ericzeng created FLINK-39383:
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Summary: [Docs] Improve scan.incremental.snapshot.chunk.key-column
documentation for MySQL/PostgreSQL/Oracle/DB2/SQLServer connectors
Key: FLINK-39383
URL: https://issues.apache.org/jira/browse/FLINK-39383
Project: Flink
Issue Type: Improvement
Components: Flink CDC
Reporter: ericzeng
The `{*}scan.incremental.snapshot.chunk.key-column{*}` option had several gaps
and inaccuracies in its documentation across multiple connectors:
1. NOT NULL / no-primary-key constraint was undocumented.
The option is required when a captured table has no primary key and the chosen
column must be NOT NULL. None of the connector docs mentioned this.
2. Multi-table format was undocumented (MySQL).
The MySQL connector supports `<table-pattern>:<column>[;...]` for assigning
different chunk key columns to different tables. This was not documented in
either the flink-source or pipeline connector docs.
3. Option was entirely missing from PostgreSQL pipeline connector docs.
4. Stale option description wording across all connectors.
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