Christian Klus b0a6798de5 [3.0.x] Fixed #32152 -- Fixed grouping by subquery aliases.
Regression in 42c08ee46539ef44f8658ebb1cbefb408e0d03fe.

Thanks Simon Charette for the review.

Backport of 4ac2d4fa42e1659f328c35b6b8d4761b3419c11a from master
2020-10-29 11:33:52 +01:00
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