in java/src/main/java/com/google/cloud/dataproc/templates/jdbc/JDBCToSpannerConfig.java [126:135]
private boolean isPartitionsPropertyValid() {
return ((StringUtils.isBlank(jdbcSQLPartitionColumn)
&& StringUtils.isBlank(jdbcSQLLowerBound)
&& StringUtils.isBlank(jdbcSQLUpperBound)
&& StringUtils.isBlank(jdbcSQLNumPartitions))
|| (StringUtils.isNotBlank(jdbcSQLPartitionColumn)
&& StringUtils.isNotBlank(jdbcSQLLowerBound)
&& StringUtils.isNotBlank(jdbcSQLUpperBound)
&& StringUtils.isNotBlank(jdbcSQLNumPartitions)));
}