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https://issues.apache.org/jira/browse/NIFI-5591?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pierre Villard reassigned NIFI-5591:
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Assignee: Pierre Villard
> Enable compression of Avro in ExecuteSQL
> ----------------------------------------
>
> Key: NIFI-5591
> URL: https://issues.apache.org/jira/browse/NIFI-5591
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework
> Affects Versions: 1.7.1
> Environment: macOS, Java 8
> Reporter: Colin Dean
> Assignee: Pierre Villard
> Priority: Major
> Labels: ExecuteSQL, avro, compression
>
> The Avro stream that comes out of the ExecuteSQL processor is uncompressed.
> It's possible to rewrite it compressed using a combination of ConvertRecord
> processor with AvroReader and AvroRecordSetWriter, but that's a lot of extra
> I/O that could be handled transparently at the moment that the Avro data is
> created.
> For implementation, it looks like ExecuteSQL builds a set of
> {{JdbcCommon.AvroConvertionOptions}}[here|https://github.com/apache/nifi/blob/ea9b0db2f620526c8dd0db595cf8b44c3ef835be/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ExecuteSQL.java#L246].
> That options object would need to gain a compression flag. Then, within
> {{JdbcCommon#convertToAvroStream}}
> [here|https://github.com/apache/nifi/blob/0dd4a91a6741eec04965a260c8aff38b72b3828d/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/JdbcCommon.java#L281],
> the {{dataFileWriter}} would get a codec set by {{setCodec}}, with the codec
> having been created shortly before.
> For example of creating the codec, I looked at how the AvroRecordSetWriter
> does it. The {{setCodec()}} is performed
> [here|https://github.com/apache/nifi/blob/ea9b0db2f620526c8dd0db595cf8b44c3ef835be/nifi-nar-bundles/nifi-standard-services/nifi-record-serialization-services-bundle/nifi-record-serialization-services/src/main/java/org/apache/nifi/avro/WriteAvroResultWithSchema.java#L44]
> after the codec is created by factory option
> [here|https://github.com/apache/nifi/blob/ea9b0db2f620526c8dd0db595cf8b44c3ef835be/nifi-nar-bundles/nifi-standard-services/nifi-record-serialization-services-bundle/nifi-record-serialization-services/src/main/java/org/apache/nifi/avro/AvroRecordSetWriter.java#L104]
> using a factory method
> [here|https://github.com/apache/nifi/blob/ea9b0db2f620526c8dd0db595cf8b44c3ef835be/nifi-nar-bundles/nifi-standard-services/nifi-record-serialization-services-bundle/nifi-record-serialization-services/src/main/java/org/apache/nifi/avro/AvroRecordSetWriter.java#L137].
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