DESCRIBE
语法
DESCRIBE [EXTENDED| FORMATTED] table_name
DESCRIBE [EXTENDED| FORMATTED] table_name PARTITION (partition_spec)
描述
查看指定表的元数据信息。该语法目前只能显示列的元数据信息,等效于语法SHOW COLUMNS。
添加EXTENDED关键字会将表的所有元数据信息以“Thrift”序列化的格式显示出来。
添加FORMATTED关键字会将表的元数据信息以表格的形式展示。
示例
显示fruit数据表的列信息:
DESCRIBE fruit;
显示fruit 元数据信息:
DESCRIBE FORMATTED fruit; Describe Formatted Table ------------------------------------------------------------------------------ # col_name data_type comment name varchar price integer # Detailed Table Information Database: default Owner: admintest LastAccessTime: 0 Location: obs://bucket/user/hive/warehouse/fruit Table Type: MANAGED_TABLE # Table Parameters: Owner ggg STATS_GENERATED_VIA_STATS_TASK workaround for potential lack of HIVE-12730 numFiles 0 numRows 0 orc.compress.size 262144 orc.compression.codec GZIP orc.row.index.stride 10000 orc.stripe.size 67108864 presto_query_id 20210308_072339_00075_5ck2k@default@HetuEngine presto_version rawDataSize 0 totalSize 0 transient_lastDdlTime 1615188219 # Storage Information SerDe Library: org.apache.hadoop.hive.ql.io.orc.OrcSerde InputFormat: org.apache.hadoop.hive.ql.io.orc.OrcInputFormat OutputFormat: org.apache.hadoop.hive.ql.io.orc.OrcOutputFormat Compressed: No Num Buckets: -1 Bucket Columns: [] Sort Columns: [] serialization.format: 1 (1 row) Query 20210309_022835_00007_2i9yy@default@HetuEngine, FINISHED, 1 node Splits: 1 total, 1 done (100.00%) 0:01 [0 rows, 0B] [0 rows/s, 0B/s];