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Posted to issues@spark.apache.org by "Shixiong Zhu (JIRA)" <ji...@apache.org> on 2019/08/07 21:34:00 UTC
[jira] [Updated] (SPARK-28651) Streaming file source doesn't change
the schema to nullable automatically
[ https://issues.apache.org/jira/browse/SPARK-28651?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Shixiong Zhu updated SPARK-28651:
---------------------------------
Description:
Right now, batch DataFrame always changes the schema to nullable automatically (See this line: https://github.com/apache/spark/blob/325bc8e9c6187a96b33a033fbb0145dfca619135/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala#L399).
However, streaming DataFrame's schema is read in this line https://github.com/apache/spark/blob/325bc8e9c6187a96b33a033fbb0145dfca619135/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala#L259 which doesn't change the schema to nullable automatically.
We should make streaming DataFrame consistent with batch.
This issue was rpo
was:
Right now, batch DataFrame always changes the schema to nullable automatically (See this line: https://github.com/apache/spark/blob/325bc8e9c6187a96b33a033fbb0145dfca619135/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala#L399).
However, streaming DataFrame's schema is read in this line https://github.com/apache/spark/blob/325bc8e9c6187a96b33a033fbb0145dfca619135/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala#L259 which doesn't change the schema to nullable automatically.
We should make streaming DataFrame consistent with batch.
> Streaming file source doesn't change the schema to nullable automatically
> -------------------------------------------------------------------------
>
> Key: SPARK-28651
> URL: https://issues.apache.org/jira/browse/SPARK-28651
> Project: Spark
> Issue Type: Bug
> Components: Structured Streaming
> Affects Versions: 2.4.3
> Reporter: Shixiong Zhu
> Priority: Major
>
> Right now, batch DataFrame always changes the schema to nullable automatically (See this line: https://github.com/apache/spark/blob/325bc8e9c6187a96b33a033fbb0145dfca619135/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala#L399).
> However, streaming DataFrame's schema is read in this line https://github.com/apache/spark/blob/325bc8e9c6187a96b33a033fbb0145dfca619135/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala#L259 which doesn't change the schema to nullable automatically.
> We should make streaming DataFrame consistent with batch.
> This issue was rpo
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