Hi Gupta Try out
DESCRIBE EXTENDED FORMATTED <table-name> I vaguely recall a operation like this. Please check hive wiki for the exact syntax. Regards Bejoy KS Sent from remote device, Please excuse typos -----Original Message----- From: Chunky Gupta <chunky.gu...@vizury.com> Date: Thu, 21 Feb 2013 17:15:37 To: <user@hive.apache.org>; <bejoy...@yahoo.com>; <snehalata_bhas...@syntelinc.com> Reply-To: user@hive.apache.org Subject: Re: Adding comment to a table for columns Hi Bejoy, Bhaskar I tried using FORMATTED, but it will not give me comments which I have put while creating table. Its output is like :- col_name data_type comment c string from deserializer time string from deserializer Thanks, Chunky. On Thu, Feb 21, 2013 at 4:50 PM, <bejoy...@yahoo.com> wrote: > ** > Hi Gupta > > You can the describe output in a formatted way using > > DESCRIBE FORMATTED <table name>; > Regards > Bejoy KS > > Sent from remote device, Please excuse typos > ------------------------------ > *From: * Chunky Gupta <chunky.gu...@vizury.com> > *Date: *Thu, 21 Feb 2013 16:46:30 +0530 > *To: *<user@hive.apache.org> > *ReplyTo: * user@hive.apache.org > *Subject: *Adding comment to a table for columns > > Hi, > > I am using this syntax to add comments for all columns :- > > CREATE EXTERNAL TABLE test ( c STRING COMMENT 'Common class', time STRING > COMMENT 'Common time', url STRING COMMENT 'Site URL' ) PARTITIONED BY (dt > STRING ) LOCATION 's3://BucketName/' > > Output of Describe Extended table is like :- (Output is just an example > copied from internet) > > hive> DESCRIBE EXTENDED table_name; > > Detailed Table Information Table(tableName:table_name, > dbName:benchmarking, owner:root, createTime:1309480053, lastAccessTime:0, > retention:0, sd:StorageDescriptor(cols:[FieldSchema(name:session_key, > type:string, comment:null), FieldSchema(name:remote_address, type:string, > comment:null), FieldSchema(name:canister_lssn, type:string, comment:null), > FieldSchema(name:canister_session_id, type:bigint, comment:null), > FieldSchema(name:tltsid, type:string, comment:null), > FieldSchema(name:tltuid, type:string, comment:null), > FieldSchema(name:tltvid, type:string, comment:null), > FieldSchema(name:canister_server, type:string, comment:null), > FieldSchema(name:session_timestamp, type:string, comment:null), > FieldSchema(name:session_duration, type:string, comment:null), > FieldSchema(name:hit_count, type:bigint, comment:null), > FieldSchema(name:http_user_agent, type:string, comment:null), > FieldSchema(name:extractid, type:bigint, comment:null), > FieldSchema(name:site_link, type:string, comment:null), > FieldSchema(name:dt, type:string, comment:null), FieldSchema(name:hour, > type:int, comment:null)], > location:hdfs://hadoop2/user/hive/warehouse/benchmarking.db/table_name, > inputFormat:org.apache.hadoop.mapred.SequenceFileInputFormat, > outputFormat:org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat, > compressed:false, numBuckets:-1, serdeInfo:SerDeInfo(name:null, > serializationLib:org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe) > > Is there any way of getting this detailed comments and column name in > readable format, just like the output of "Describe table_name" ?. > > > Thanks, > > Chunky. >
