mirror of
https://github.com/apache/impala.git
synced 2026-01-05 03:01:02 -05:00
6bc411c890
This patch adds support for V6 of the HS2 protocol, which notably includes columnar organisation of result sets. Clients that set their protocol version to < V6 will receive result sets in the traditional row orientation. The performance of fetches over HS2 goes up significantly as a result, since the V1 protocol had some pathologies in its deserialisation performance. Beeswax Row materialisation: 455ms, client processing time: 523ms HS2 V6: Row materialisation: 444ms, client processing time: 1.8s HS2 V1: Row materialisation: 585ms, client processing time: 15.9s (!) TODO: Add support for the CHAR datatype The following patch is also included: Fix wait-for-hiveserver2.py when Impala moves to HS2 V6 Due to HIVE-6050, older versions of Hive are not compatible with newer clients (even those that try to use old protocol versions). wait-for-hiveserver2.py uses HS2 to talk to the HiveServer2 service, but picks up the newer version from V6, and fails. This patch temporarily re-adds cli_service.thrift (renaming the Thrift service as LegacyTCLIService) only for wait-for-hiveserver2.py to use. As soon as Impala's thirdparty Hive moves to HS2 V6, we can get rid of this change. Change-Id: I2cbe884345ae7e772620b80a29b6574bd6532940 Reviewed-on: http://gerrit.sjc.cloudera.com:8080/4402 Tested-by: jenkins Reviewed-by: Henry Robinson <henry@cloudera.com>