public PostgresSourceBuilder<T> chunkKeyColumn(String chunkKeyColumn) {
        this.configFactory.chunkKeyColumn(chunkKeyColumn);
        return this;
    }
The chunk key of table snapshot, captured tables are split into multiple chunks by the chunk
key column when read the snapshot of table.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/postgres-cdc/src/main/java/org/apache/inlong/sort/cdc/postgres/source/PostgresSourceBuilder.java