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