Github user shixuan-fan commented on a diff in the pull request:
https://github.com/apache/incubator-quickstep/pull/58#discussion_r71403917
--- Diff: query_optimizer/tests/execution_generator/Select.test ---
@@ -953,19 +953,79 @@ WHERE double_col < 0
==
# Window Aggregation Test.
-# Currently this is not supported, an empty table will be returned.
-SELECT avg(int_col) OVER w FROM test
+SELECT char_col, long_col, avg(long_col) OVER w FROM test
WINDOW w AS
-(PARTITION BY char_col
- ORDER BY long_col DESC NULLS LAST
+(ORDER BY char_col DESC NULLS LAST
--- End diff --
When the `RANGE` mode is introduced, a new parameter will be added to the
`WindowAggregationHandle::calculate()` method, and would most likely be `const
std::vector<attribute_id> &order_by_ids`. As for the cases where `ORDER BY`
clause is missing, the vector would simply be empty, which indicates that the
table is sorted by `tuple_id`.
I don't think we need to explicitly add `tuple_id` as a sort attribute,
because it is not actually an attribute.
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