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https://issues.apache.org/jira/browse/ATLAS-626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15254377#comment-15254377
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Suma Shivaprasad edited comment on ATLAS-626 at 4/22/16 6:22 PM:
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The fix for this creates the temp tables only when its part of a lineage and
skips Temp table registration for "CREATE TABLE"
CREATE EXTERNAL table is captured though since we do not want to miss HDFS path
to temp table lineage which could be used further to create further datasets
was (Author: suma.shivaprasad):
The fix for this creates the temp tables only when its part of a lineage and
skips Temp table registration for "CREATE TABLE"
> 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: 0.7-incubating
> Reporter: Ayub Khan
> Assignee: Suma Shivaprasad
> Fix For: 0.7-incubating
>
> Attachments: ATLAS-626.patch
>
>
> 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
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> | |
> | tmp_values_col2 | string
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> | |
> | tmp_values_col3 | string
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> | |
> | tmp_values_col4 | string
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> | |
> | | NULL
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> | 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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