Vineet Garg created HIVE-20292:
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Summary: Bad join ordering in query93 with primary constraint
defined
Key: HIVE-20292
URL: https://issues.apache.org/jira/browse/HIVE-20292
Project: Hive
Issue Type: Improvement
Components: Query Planning
Reporter: Vineet Garg
Assignee: Vineet Garg
Query 93 has join (including outer) b/w store_sales, store_return and reason.
Without constraints store_return is joined with reason and then with
store_sales.
But if a primary key is added on store_return (alter table store_returns add
constraint tpcds_pk_sr primary key (sr_item_sk, sr_ticket_number) disable
novalidate rely) join order becomes ((store_sales, store_return), reason) which
is very inefficient.
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