[jira] [Created] (HIVE-23965) Improve plan regression tests using TPCDS30TB metastore dump and custom configs

["Stamatis Zampetakis (Jira)" <ji...@apache.org>]

Stamatis Zampetakis created HIVE-23965:
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             Summary: Improve plan regression tests using TPCDS30TB metastore dump and custom configs
                 Key: HIVE-23965
                 URL: https://issues.apache.org/jira/browse/HIVE-23965
             Project: Hive
          Issue Type: Improvement
            Reporter: Stamatis Zampetakis


The existing regression tests (HIVE-12586) based on TPC-DS have certain shortcomings:

The table statistics do not reflect cardinalities from a specific TPC-DS scale factor (SF). Some tables are from a 30TB dataset, others from 200GB dataset, and others from a 3GB dataset. This mix leads to plans that may never appear when using an actual TPC-DS dataset. 

The existing statistics do not contain information about partitions something that can have a big impact on the resulting plans.

The existing regression tests rely on more or less on the default configuration (hive-site.xml). In real-life scenarios though some of the configurations differ and may impact the choices of the optimizer.

This issue aims to address the above shortcomings by using a curated TPCDS30TB metastore dump along with some custom hive configurations. 



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