hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Navis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-4293) Predicates following UDTF operator are removed by PPD
Date Thu, 04 Apr 2013 04:45:20 GMT

     [ https://issues.apache.org/jira/browse/HIVE-4293?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Navis updated HIVE-4293:
------------------------

    Description: 
For example, 
{noformat}
explain SELECT value from (
  select explode(array(key, value)) as (value) from (
    select * FROM src WHERE key > 200
  ) A
) B WHERE value > 300
;
{noformat}

Makes plan like this, removing last predicates
{noformat}
  TableScan
    alias: src
    Filter Operator
      predicate:
          expr: (key > 200.0)
          type: boolean
      Select Operator
        expressions:
              expr: array(key,value)
              type: array<string>
        outputColumnNames: _col0
        UDTF Operator
          function name: explode
          Select Operator
            expressions:
                  expr: col
                  type: string
            outputColumnNames: _col0
            File Output Operator
              compressed: false
              GlobalTableId: 0
              table:
                  input format: org.apache.hadoop.mapred.TextInputFormat
                  output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
{noformat}
    
> Predicates following UDTF operator are removed by PPD
> -----------------------------------------------------
>
>                 Key: HIVE-4293
>                 URL: https://issues.apache.org/jira/browse/HIVE-4293
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Navis
>            Assignee: Navis
>
> For example, 
> {noformat}
> explain SELECT value from (
>   select explode(array(key, value)) as (value) from (
>     select * FROM src WHERE key > 200
>   ) A
> ) B WHERE value > 300
> ;
> {noformat}
> Makes plan like this, removing last predicates
> {noformat}
>   TableScan
>     alias: src
>     Filter Operator
>       predicate:
>           expr: (key > 200.0)
>           type: boolean
>       Select Operator
>         expressions:
>               expr: array(key,value)
>               type: array<string>
>         outputColumnNames: _col0
>         UDTF Operator
>           function name: explode
>           Select Operator
>             expressions:
>                   expr: col
>                   type: string
>             outputColumnNames: _col0
>             File Output Operator
>               compressed: false
>               GlobalTableId: 0
>               table:
>                   input format: org.apache.hadoop.mapred.TextInputFormat
>                   output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
> {noformat}

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message