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IMPALA-8954: Uncorrelated scalar subqueries in the select list

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Extend StmtRewriter with the ability to rewrite scalar subqueries in the
select list into cross joins. Currently the subquery must pass plan-time
checks to determine that it returns a single row which may miss cases
that may be valid at runtime or with more complex evaluation of the
predicate expressions in the planner. Support for correlated subqueries
will be a follow on change.

Testing:
  * Added new analyzer tests, updated previous subquery tests
  * test_queries.py::TestQueries::test_subquery
  * Added test_tpcds_q9 to e2e and planner tests

Change-Id: Ibcf55d26889aa01d69bb85f18c9241dda095fb66
Reviewed-on: http://gerrit.cloudera.org:8080/16007
Reviewed-by: Tim Armstrong <tarmstrong@cloudera.com>
Tested-by: Tim Armstrong <tarmstrong@cloudera.com>
This commit is contained in:
Shant Hovsepian
2020-05-29 16:26:07 -04:00
committed by Tim Armstrong
parent 49af396c10
commit 388ad555d7
13 changed files with 1572 additions and 18 deletions
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2
tests/util/parse_util.py
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@@ -22,7 +22,7 @@ from datetime import datetime
# changed, and the stress test loses the ability to run the full set of queries. Set
# these constants and assert that when a workload is used, all the queries we expect to
# use are there.
EXPECTED_TPCDS_QUERIES_COUNT = 84
EXPECTED_TPCDS_QUERIES_COUNT = 85
EXPECTED_TPCH_NESTED_QUERIES_COUNT = 22
EXPECTED_TPCH_QUERIES_COUNT = 22
# Add the number of stress test specific queries, i.e. in files like '*-stress-*.test'