Hello Impala Public Jenkins, I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/16095 to look at the new patch set (#2). Change subject: IMPALA-9633: Implement ds_hll_union() ...................................................................... IMPALA-9633: Implement ds_hll_union() This function receives a set of sketches produced by ds_hll_sketch() and merges them into a single sketch. An example usage is to create a sketch for each partition of a table, write these sketches to a separate table and based on which partition the user is interested of the relevant sketches can be union-ed together to get an estimate. E.g.: SELECT ds_hll_estimate(ds_hll_union(sketch_col)) FROM sketch_tbl WHERE partition_col=1 OR partition_col=5; Testing: - Apart from the automated tests I added to this patch I also tested ds_hll_union() on a bigger dataset to check that serialization, deserialization and merging steps work well. I took TPCH25.linelitem, created a number of sketches with grouping by l_shipdate and called ds_hll_union() on those sketches. Change-Id: I67cdbf6f3ebdb1296fea38465a15642bc9612d09 --- M be/src/exprs/CMakeLists.txt M be/src/exprs/aggregate-functions-ir.cc M be/src/exprs/aggregate-functions.h A be/src/exprs/datasketches-common.cc A be/src/exprs/datasketches-common.h M be/src/exprs/datasketches-functions-ir.cc M fe/src/main/java/org/apache/impala/catalog/BuiltinsDb.java M testdata/workloads/functional-query/queries/QueryTest/datasketches-hll.test 8 files changed, 244 insertions(+), 34 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/95/16095/2 -- To view, visit http://gerrit.cloudera.org:8080/16095 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: newpatchset Gerrit-Change-Id: I67cdbf6f3ebdb1296fea38465a15642bc9612d09 Gerrit-Change-Number: 16095 Gerrit-PatchSet: 2 Gerrit-Owner: Gabor Kaszab <gaborkas...@cloudera.com> Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>