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Posted to dev@atlas.apache.org by "Suma Shivaprasad (JIRA)" <ji...@apache.org> on 2016/04/15 22:12:25 UTC
[jira] [Assigned] (ATLAS-626) Hive temporary table metadata is
captured in atlas.
[ https://issues.apache.org/jira/browse/ATLAS-626?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Suma Shivaprasad reassigned ATLAS-626:
--------------------------------------
Assignee: Suma Shivaprasad
> Hive temporary table metadata is captured in atlas.
> ---------------------------------------------------
>
> Key: ATLAS-626
> URL: https://issues.apache.org/jira/browse/ATLAS-626
> Project: Atlas
> Issue Type: Bug
> Affects Versions: trunk
> Reporter: Ayub Khan
> Assignee: Suma Shivaprasad
> Fix For: trunk
>
>
> As part of HIVE-7090, hive supports session level temporary tables and life cycle of them.
> These temporary tables are used to run some additional queries against it and cleaned up at the end of the session.
> Inserting data in to table creates this temporary table, whose metadata is synced to atlas and once the session expires, the table is cleaned up in hive but the table still exists in atlas.
> 1. What is the use-case of storing metadata of this temporary table? Are temporary tables important?
> 2. Impact: Metadata objects might grow if the the probability of insert operation is high in production.
> Lineage snapshot link: https://monosnap.com/file/DtnPZA85Ug0Q27arTOqY1FnhbDQdXU
> {noformat}
> 0: jdbc:hive2://localhost:10000/default> show tables;
> +-----------+--+
> | tab_name |
> +-----------+--+
> | abc12312 |
> | h3 |
> | h5 |
> +-----------+--+
> 3 rows selected (0.231 seconds)
> 0: jdbc:hive2://localhost:10000/default> insert into table default.h5 values ( "efg1", "abc1", 1231, 123121);
> INFO : Number of reduce tasks is set to 0 since there's no reduce operator
> INFO : number of splits:1
> INFO : Submitting tokens for job: job_local737234864_0006
> INFO : The url to track the job: http://localhost:8080/
> INFO : Job running in-process (local Hadoop)
> INFO : 2016-04-04 15:21:20,381 Stage-1 map = 100%, reduce = 0%
> INFO : Ended Job = job_local737234864_0006
> INFO : Stage-4 is selected by condition resolver.
> INFO : Stage-3 is filtered out by condition resolver.
> INFO : Stage-5 is filtered out by condition resolver.
> INFO : Moving data to: hdfs://localhost:9000/user/hive/warehouse/h5/.hive-staging_hive_2016-04-04_15-21-17_057_941878903735098303-9/-ext-10000 from hdfs://localhost:9000/user/hive/warehouse/h5/.hive-staging_hive_2016-04-04_15-21-17_057_941878903735098303-9/-ext-10002
> INFO : Loading data to table default.h5 from hdfs://localhost:9000/user/hive/warehouse/h5/.hive-staging_hive_2016-04-04_15-21-17_057_941878903735098303-9/-ext-10000
> INFO : Table default.h5 stats: [numFiles=5, numRows=5, totalSize=106, rawDataSize=101]
> No rows affected (3.72 seconds)
> 0: jdbc:hive2://localhost:10000/default> show tables;
> +------------------------+--+
> | tab_name |
> +------------------------+--+
> | abc12312 |
> | h3 |
> | h5 |
> | values__tmp__table__1 |
> +------------------------+--+
> 4 rows selected (0.196 seconds)
> 0: jdbc:hive2://localhost:10000/default> describe extended values__tmp__table__1;
> +-----------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------+--+
> | col_name | data_type | comment |
> +-----------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------+--+
> | tmp_values_col1 | string | |
> | tmp_values_col2 | string | |
> | tmp_values_col3 | string | |
> | tmp_values_col4 | string | |
> | | NULL | NULL |
> | Detailed Table Information | Table(tableName:values__tmp__table__1, dbName:default, owner:apathan, createTime:1459763477, lastAccessTime:0, retention:0, sd:StorageDescriptor(cols:[FieldSchema(name:tmp_values_col1, type:string, comment:), FieldSchema(name:tmp_values_col2, type:string, comment:), FieldSchema(name:tmp_values_col3, type:string, comment:), FieldSchema(name:tmp_values_col4, type:string, comment:)], location:hdfs://localhost:9000/tmp/hive/apathan/d461c5c3-931a-4aa3-9124-997b75f10c11/_tmp_space.db/Values__Tmp__Table__1, inputFormat:org.apache.hadoop.mapred.TextInputFormat, outputFormat:org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat, compressed:false, numBuckets:-1, serdeInfo:SerDeInfo(name:null, serializationLib:org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe, parameters:{serialization.format=1}), bucketCols:[], sortCols:[], parameters:{}, skewedInfo:SkewedInfo(skewedColNames:[], skewedColValues:[], skewedColValueLocationMaps:{}), storedAsSubDirectories:false), partitionKeys:[], parameters:{}, viewOriginalText:null, viewExpandedText:null, tableType:MANAGED_TABLE, privileges:PrincipalPrivilegeSet(userPrivileges:{}, groupPrivileges:null, rolePrivileges:null), temporary:true) | |
> +-----------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------+--+
> 6 rows selected (0.174 seconds)
> 0: jdbc:hive2://localhost:10000/default>
> {noformat}
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