Nishant Bangarwa created HIVE-20278: ---------------------------------------
Summary: Druid Scan Query avoid copying from List -> Map -> List Key: HIVE-20278 URL: https://issues.apache.org/jira/browse/HIVE-20278 Project: Hive Issue Type: Improvement Reporter: Nishant Bangarwa Assignee: Nishant Bangarwa DruidScanQueryRecordReader gets a compacted List<Object> from druid. It then converts that list into a Map<String,Object> as DruidWritable where key is the column name. At the second stage DruidSerde takes this DruidWritable and creates a List out out of the map again. We can avoid the map creation part by reading the list sent by druid directly in the DruidSerde.deserialize() method. -- This message was sent by Atlassian JIRA (v7.6.3#76005)