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由 Heikki Linnakangas 提交于
The last 8.4 merge commit introduced support for DISTINCT with hashing, and refactored the way grouping_planner() works with the path keys. That broke DISTINCT with window functions, because the new distinct_pathkeys field was not set correctly. In commit 474f1db0, I moved some GPDB-added tests from the 'aggregates' test, to a new 'gp_aggregates' test. But I forgot to add the new test file to the test schedule, so it was not run. Oops. Add it to the schedule now. The tests in 'gp_aggregates' cover this bug.
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