[
https://issues.apache.org/jira/browse/BEAM-5056?focusedWorklogId=129735&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-129735
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ASF GitHub Bot logged work on BEAM-5056:
----------------------------------------
Author: ASF GitHub Bot
Created on: 01/Aug/18 16:24
Start Date: 01/Aug/18 16:24
Worklog Time Spent: 10m
Work Description: akedin commented on issue #6118: [BEAM-5056] [SQL] Fix
nullability in output schema
URL: https://github.com/apache/beam/pull/6118#issuecomment-409634416
+ @apilloud @amaliujia
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Issue Time Tracking
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Worklog Id: (was: 129735)
Time Spent: 0.5h (was: 20m)
> [SQL] Nullability of aggregation expressions isn't inferred properly
> --------------------------------------------------------------------
>
> Key: BEAM-5056
> URL: https://issues.apache.org/jira/browse/BEAM-5056
> Project: Beam
> Issue Type: Bug
> Components: dsl-sql
> Reporter: Gleb Kanterov
> Assignee: Xu Mingmin
> Priority: Major
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Given schema and rows:
> {code:java}
> Schema schema =
> Schema.builder()
> .addNullableField("f_int1", Schema.FieldType.INT32)
> .addNullableField("f_int2", Schema.FieldType.INT32)
> .build();
> List<Row> rows =
> TestUtils.RowsBuilder.of(schema)
> .addRows(null, null)
> .getRows();
> {code}
> Following query fails:
> {code:sql}
> SELECT AVG(f_int1) FROM PCOLLECTION GROUP BY f_int2
> {code}
> {code:java}
> Caused by: java.lang.IllegalArgumentException: Field EXPR$0 is not
> nullable{code}
>
>
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