public static Column getSplitColumn(Table table, JdbcSourceConfig sourceConfig) {
        return ChunkUtils.getChunkKeyColumn(table, sourceConfig.getChunkKeyColumn());
    }
Returns the distribution factor of the given table.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/oracle-cdc/src/main/java/org/apache/inlong/sort/cdc/oracle/source/splitter/OracleChunkSplitter.java