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https://issues.apache.org/jira/browse/ASTERIXDB-3234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ian Maxon updated ASTERIXDB-3234:
---------------------------------
Labels: triaged (was: )
> Incorrect handling of empty arrays in columnar collections
> ----------------------------------------------------------
>
> Key: ASTERIXDB-3234
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-3234
> Project: Apache AsterixDB
> Issue Type: Bug
> Components: STO - Storage
> Affects Versions: 0.9.9
> Reporter: Wail Y. Alkowaileet
> Assignee: Wail Y. Alkowaileet
> Priority: Critical
> Labels: triaged
> Fix For: 0.9.9
>
>
> Currently, columnar collections doesn't handle empty arrays correctly.
> * If an array was always empty and a flush occurred, a NPE exception is
> thrown
> {noformat}
> java.lang.NullPointerException: Cannot invoke
> "org.apache.asterix.column.metadata.schema.AbstractSchemaNode.serialize(java.io.DataOutput,
> org.apache.asterix.column.metadata.PathInfoSerializer)" because "this.item"
> is null {noformat}
> * If the array item type is known but the array itself is empty, we treat
> it as if the array itself is missing. This is incorrect and produces a
> different result compared to the row format. Below is an example of the
> current output of an empty array
> {noformat}
> Input: {"a" []}
> Output: {} {noformat}
>
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