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https://reviews.apache.org/r/62247/
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Review request for hive, Carl Steinbach and Ratandeep Ratti.
Bugs: HIVE-17394
https://issues.apache.org/jira/browse/HIVE-17394
Repository: hive-git
Description
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Previously, when Avro found a nullable union in the reader schema, it would
regenerate the TypeInfo for the field for every record. This patch reuses the
same TypeInfo that only needs to be calculated once.
In our testing, we found this improved count() queries by 2x.
Diffs
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serde/src/java/org/apache/hadoop/hive/serde2/avro/AvroDeserializer.java
ecfe15f59dac04bda3f8f1275babebf736608a6b
Diff: https://reviews.apache.org/r/62247/diff/1/
Testing
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`mvn clean package -DskipTests -Dmaven.javadoc.skip=true` succeeded.
Thanks,
Anthony Hsu
