public JdbcSourceConfigFactory distributionFactorUpper(double distributionFactorUpper) {
        this.distributionFactorUpper = distributionFactorUpper;
        return this;
    }
The upper bound of split key evenly distribution factor, the factor is used to determine
whether the table is evenly distribution or not.
inlong-sort/sort-flink/cdc-base/src/main/java/org/apache/inlong/sort/cdc/base/config/JdbcSourceConfigFactory.java