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This patch adds support for executing implicit cross joins in Impala. An implicit cross join occurs when two tables are referenced in the FROM clause of a select statement without specifying the join type and in absence of applicable equi-join predicate. To convert an implicit join into a cross join, we manually create the cross join node during the join reordering. When two sub-plans are compared to each other a Hash Join plan is always preferred. As a side effect, explicit cross joins that have equi join conjuncts are now rewritten to hash joins. This patch enables us to run TPC-DS queries Q61 and Q88 which are added as planner and query tests. Change-Id: Ifd53a78e8eb38d553eb039bfeef0216e438790ba Reviewed-on: http://gerrit.sjc.cloudera.com:8080/4695 Reviewed-by: Martin Grund <mgrund@cloudera.com> Tested-by: jenkins (cherry picked from commit 77ff7f09350d028be033d772c5c456ceb8828013) Reviewed-on: http://gerrit.sjc.cloudera.com:8080/5319
This directory contains Impala test workloads. The directory layout for the workloads should follow: workloads/ <data set name>/<data set name>_dimensions.csv <- The test dimension file <data set name>/<data set name>_core.csv <- A test vector file <data set name>/<data set name>_pairwise.csv <data set name>/<data set name>_exhaustive.csv <data set name>/queries/<query test>.test <- The queries for this workload