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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