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Fix BRIN minmax-multi distance for inet type

Tomas Vondra <tomas.vondra@postgresql.org>

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Commit: e1fbe1181c86247eaf8b4b142b81361ce4efcc66
Author: Tomas Vondra <tomas.vondra@postgresql.org>
Date: 2021-04-04T17:23:32Z
Releases: 14.0 
Fix BRIN minmax-multi distance for inet type

The distance calculation ignored the mask, unlike the inet comparator,
which resulted in negative distance in some cases. Fixed by applying the
mask in brin_minmax_multi_distance_inet. I've considered simply calling
inetmi() to calculate the delta, but that does not consider mask either.

Reviewed-by: Zhihong Yu
Discussion: https://postgr.es/m/1a0a7b9d-9bda-e3a2-7fa4-88f15042a051%40enterprisedb.com

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PathChange+/−
src/backend/access/brin/brin_minmax_multi.c modified +51 −8

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