commit | 4cb3c3556e77ee24003383155ca5e1b70be4db6e | [log] [tgz] |
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author | Adam Tamas <tadam@cloudera.com> | Wed Aug 26 13:22:54 2020 +0200 |
committer | Impala Public Jenkins <impala-public-jenkins@cloudera.com> | Wed Sep 02 10:49:10 2020 +0000 |
tree | db90771ed785a737395e56e700db51fcfca1d39c | |
parent | 0098113d9582c3b93044eed4078a7f0724dda26f [diff] |
IMPALA-10108: Implement ds_kll_stringify function This function receives a string that is a serialized Apache DataSketches KLL sketch and returns its stringified format. A stringified format should look like and contains the following data: select ds_kll_stringify(ds_kll_sketch(float_col)) from functional_parquet.alltypestiny; +--------------------------------------------+ | ds_kll_stringify(ds_kll_sketch(float_col)) | +--------------------------------------------+ | ### KLL sketch summary: | | K : 200 | | min K : 200 | | M : 8 | | N : 8 | | Epsilon : 1.33% | | Epsilon PMF : 1.65% | | Empty : false | | Estimation mode: false | | Levels : 1 | | Sorted : false | | Capacity items : 200 | | Retained items : 8 | | Storage bytes : 64 | | Min value : 0 | | Max value : 1.1 | | ### End sketch summary | | | +--------------------------------------------+ Change-Id: I97f654a4838bf91e3e0bed6a00d78b2c7aa96f75 Reviewed-on: http://gerrit.cloudera.org:8080/16370 Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Lightning-fast, distributed SQL queries for petabytes of data stored in Apache Hadoop clusters.
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