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https://issues.apache.org/jira/browse/BEAM-7010?focusedWorklogId=224480&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-224480
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ASF GitHub Bot logged work on BEAM-7010:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 08/Apr/19 17:13
            Start Date: 08/Apr/19 17:13
    Worklog Time Spent: 10m 
      Work Description: amaliujia commented on issue #8230: [BEAM-7010] 
MAX/MIN(STRING)
URL: https://github.com/apache/beam/pull/8230#issuecomment-480918414
 
 
   I think aggregation tests use test tables defined in 
[BeamSqlDslBase.java](https://github.com/apache/beam/blob/master/sdks/java/extensions/sql/src/test/java/org/apache/beam/sdk/extensions/sql/BeamSqlDslBase.java),
 which has multiple rows test tables?
   
   For example `rowsInTableA` is a table with 4 rows.
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 224480)
    Time Spent: 1h  (was: 50m)

> MAX/MIN(STRING)
> ---------------
>
>                 Key: BEAM-7010
>                 URL: https://issues.apache.org/jira/browse/BEAM-7010
>             Project: Beam
>          Issue Type: Improvement
>          Components: dsl-sql
>            Reporter: Rui Wang
>            Assignee: Rui Wang
>            Priority: Major
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> https://github.com/apache/beam/blob/master/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/transform/BeamBuiltinAggregations.java#L108
> BeamSQL does not accept STRING as MIN/MAX's input parameter type.



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