Hive desc
Describe Database
hive> DESCRIBE DATABASE test;
test ??? hdfs://ns1/user/hive/warehouse/test.db wx USER
hive> DESCRIBE DATABASE EXTENDED test;
test ??? hdfs://ns1/user/hive/warehouse/test.db wx USER {date=2015-07-18, creator=wx}
Describe Table/View/Column
hive> DESCRIBE user_info_bucketed;
user_id bigint
firstname string
lastname string
ds string
# Partition Information
# col_name data_type comment
ds string
hive> DESCRIBE FORMATTED user_info_bucketed.firstname
hive> DESCRIBE FORMATTED user_info_bucketed firstname;
# col_name data_type min max num_nulls distinct_count avg_col_len max_col_len num_trues num_falses comment
firstname string from deserializer
hive> DESCRIBE EXTENDED user_info_bucketed.firstname;
firstname string from deserializer
hive> DESCRIBE FORMATTED user_info_bucketed;
# col_name data_type comment
user_id bigint
firstname string
lastname string
# Partition Information
# col_name data_type comment
ds string
# Detailed Table Information
Database: test
Owner: huai
CreateTime: Sat Jul 25 10:56:50 CST 2015
LastAccessTime: UNKNOWN
Protect Mode: None
Retention: 0
Location: hdfs://ns1/user/hive/warehouse/test.db/user_info_bucketed
Table Type: MANAGED_TABLE
Table Parameters:
comment A bucketed copy of user_info
transient_lastDdlTime 1437793010
# Storage Information
SerDe Library: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
InputFormat: org.apache.hadoop.mapred.TextInputFormat
OutputFormat: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
Compressed: No
Num Buckets: 3
Bucket Columns: [user_id]
Sort Columns: [Order(col:firstname, order:1)]
Storage Desc Params:
serialization.format 1
hive> DESCRIBE EXTENDED user_info_bucketed;
user_id bigint
firstname string
lastname string
ds string
# Partition Information
# col_name data_type comment
ds string
Detailed Table Information Table(tableName:user_info_bucketed, dbName:test, owner:huai, createTime:1437793010, lastAccessTime:0, retention:0, sd:StorageDescriptor(cols:[FieldSchema(name:user_id, type:bigint, comment:null), FieldSchema(name:firstname, type:string, comment:null), FieldSchema(name:lastname, type:string, comment:null), FieldSchema(name:ds, type:string, comment:null)], location:hdfs://ns1/user/hive/warehouse/test.db/user_info_bucketed, inputFormat:org.apache.hadoop.mapred.TextInputFormat, outputFormat:org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat, compressed:false, numBuckets:3, serdeInfo:SerDeInfo(name:null, serializationLib:org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe, parameters:{serialization.format=1}), bucketCols:[user_id], sortCols:[Order(col:firstname, order:1)], parameters:{}, skewedInfo:SkewedInfo(skewedColNames:[], skewedColValues:[], skewedColValueLocationMaps:{}), storedAsSubDirectories:false), partitionKeys:[FieldSchema(name:ds, type:string, comment:null)], parameters:{transient_lastDdlTime=1437793010, comment=A bucketed copy of user_info}, viewOriginalText:null, viewExpandedText:null, tableType:MANAGED_TABLE)
Describe Partition
hive> DESCRIBE FORMATTED user_info_bucketed PARTITION (ds='2015-07-25');
# col_name data_type comment
user_id bigint
firstname string
lastname string
# Partition Information
# col_name data_type comment
ds string
# Detailed Partition Information
Partition Value: [2015-07-25]
Database: test
Table: user_info_bucketed
CreateTime: Sat Jul 25 10:59:28 CST 2015
LastAccessTime: UNKNOWN
Protect Mode: None
Location: hdfs://ns1/user/hive/warehouse/test.db/user_info_bucketed/ds=2015-07-25
Partition Parameters:
COLUMN_STATS_ACCURATE true
numFiles 3
numRows 4
rawDataSize 68
totalSize 72
transient_lastDdlTime 1437793168
# Storage Information
SerDe Library: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
InputFormat: org.apache.hadoop.mapred.TextInputFormat
OutputFormat: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
Compressed: No
Num Buckets: 3
Bucket Columns: [user_id]
Sort Columns: [Order(col:firstname, order:1)]
Storage Desc Params:
serialization.format 1
