[ https://issues.apache.org/jira/browse/HIVE-23965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17169040#comment-17169040 ]
Stamatis Zampetakis commented on HIVE-23965: -------------------------------------------- One thing that I am wondering is if it is worth keeping the old perf CLI driver. Let me know what you think. > 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 > Assignee: Stamatis Zampetakis > Priority: Major > Labels: pull-request-available > Time Spent: 10m > Remaining Estimate: 0h > > 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. -- This message was sent by Atlassian Jira (v8.3.4#803005)