btree_gin: Fix calculation of leftmost interval value.
Formerly, the value computed by leftmostvalue_interval() was a long
way short of the minimum possible interval value. As a result, an
index scan on a GIN index on an interval column with < or <= operators
would miss large negative interval values.
Fix by setting all fields of the leftmost interval to their minimum
values, ensuring that the result is less than any other possible
interval. Since this only affects index searches, no index rebuild is
necessary.
Back-patch to all supported branches.
Dean Rasheed, reviewed by Heikki Linnakangas.
Discussion: https://postgr.es/m/CAEZATCV80%2BgOfF8ehNUUfaKBZgZMDfCfL-g1HhWGb6kC3rpDfw%40mail.gmail.com
Branch
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REL_12_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/f7cd7b265f6f96689a42d61f1e312554e1ff9fa8
Modified Files
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contrib/btree_gin/btree_gin.c | 6 +++---
contrib/btree_gin/expected/interval.out | 16 +++++++++++-----
contrib/btree_gin/sql/interval.sql | 4 +++-
3 files changed, 17 insertions(+), 9 deletions(-)