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0736b11318
check_agg_arguments_walker() supposed that it needn't descend into the arguments of a lower-level aggregate function, but this is just wrong in the presence of multiple levels of sub-select. The oversight would lead to executor failures on queries that should be rejected. (Prior to v11, they actually were rejected, thanks to a "redundant" execution-time check.) Per bug #17835 from Anban Company. Back-patch to all supported branches. Discussion: https://postgr.es/m/17835-4f29f3098b2d0ba4@postgresql.org |
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