更新时间：2024-07-02 GMT+08:00
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: hdfs://hacluster/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];
父主题： HetuEngine辅助命令语法
