统计分区表元数据
ANALYZE TABLE tableName PARTITION(etl_tx_dt=20190729) COMPUTE STATISTICS;
DESCRIBE EXTENDED tableName PARTITION(etl_tx_dt=20190729);
ANALYZE TABLE tableName PARTITION(etl_tx_dt=20190729) COMPUTE STATISTICS;
DESCRIBE EXTENDED tableName PARTITION(etl_tx_dt=20190729);