Enable hive splits for uncompressed JSON files with S3 Select pushdown #14040
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dnanuti
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arhimondr
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fuatbasik
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preethiratnam
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plugin/trino-hive-hadoop2/src/test/java/io/trino/plugin/hive/s3select/S3SelectTestHelper.java
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plugin/trino-hive-hadoop2/src/test/java/io/trino/plugin/hive/s3select/S3SelectTestHelper.java
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...test/java/io/trino/plugin/hive/s3select/TestHiveFileSystemS3SelectCsvPushdownWithSplits.java
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plugin/trino-hive/src/main/java/io/trino/plugin/hive/s3select/csv/S3SelectCsvRecordReader.java
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Scan range allows S3 Select to query uncompressed files at a finer granularity than the entire object, by providing a byte range to SelectObjectContent requests. This change enables hive internal splits for S3 Select uncompressed JSON input.
arhimondr
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Sep 20, 2022
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Description
Scan range allows S3 Select to query uncompressed files at a finer granularity than the entire object, by providing a byte range to SelectObjectContent requests. Support for CSV input files was added in revision 0b8d11c. This change enables hive internal splits for S3 Select uncompressed JSON input.
Documentation updates will come in a separate PR, as this is already quite large.
Non-technical explanation
Trino client will return results faster when S3 Select pushdown is enabled for uncompressed JSON files:
set SESSION hive.s3_select_pushdown_enabled=true;
Release notes
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