Implements grouping() and grouping_id() builtins.
grouping_id() has both a no-arg version, which returns
a bit vector of all grouping exprs and a varargs version,
which returns a bit vector of the provided arguments.
Grouping is a keyword, so needs special handling in the
parser to be accepted as a function name.
These functions are implemented in the transpose agg
with a CASE expression similar to other aggregate functions,
but returning the grouping() or grouping_id() value for that
aggregation class instead of an aggregated value.
Testing:
* Added parser test for grouping keyword.
* Added analysis tests for the functions.
* Added basic planner test to show expressions generated
* Added some TPC-DS queries that use grouping() - queries
80, 70 and 86 using reference .test files from Fang-Yu
Rao. 27 and 36 were added with reference results from
https://github.com/cwida/tpcds-result-reproduction
* Add targeted end-to-end tests.
* Added view compatibility test with Hive.
Change-Id: If0b1640d606256c0fe9204d2a21a8f6d06abcdb6
Reviewed-on: http://gerrit.cloudera.org:8080/16140
Reviewed-by: Tim Armstrong <tarmstrong@cloudera.com>
Tested-by: Tim Armstrong <tarmstrong@cloudera.com>
Integrates the parsing and analysis with plan generation.
Testing:
* Add analysis test to make sure we reject unsupported queries.
* Added targeted planner tests to ensure we generate the correct
aggregation classes for a variety of cases.
* Add targeted end-to-end functional tests.
Added five TPC-DS queries that use ROLLUP, building on some work done
by Fang-Yu Rao. Some tweaks were required for these tests.
* Add an extra ORDER BY clause to q77 to make fully deterministic.
* Add backticks around `returns` to avoid reserved word.
* Add INTERVAL keyword to date/timestamp arithmetic.
We can run q80, too, but I haven't added or verified results yet -
that can be done in a follow-up.
Change-Id: Ie454c5bf7aee266321dee615548d7f2b71380197
Reviewed-on: http://gerrit.cloudera.org:8080/16128
Reviewed-by: Tim Armstrong <tarmstrong@cloudera.com>
Tested-by: Tim Armstrong <tarmstrong@cloudera.com>
