pgsql: Fix arrays comparison in CompareOpclassOptions()

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pgsql: Fix arrays comparison in CompareOpclassOptions()

От:
Alexander Korotkov <akorotkov@postgresql.org>
Дата:
Fix arrays comparison in CompareOpclassOptions()

The current code calls array_eq() and does not provide FmgrInfo.  This commit
provides initialization of FmgrInfo and uses C collation as the safe option
for text comparison because we don't know anything about the semantics of
opclass options.

Backpatch to 13, where opclass options were introduced.

Reported-by: Nicolas Maus
Discussion: https://postgr.es/m/18692-72ea398df3ec6712%40postgresql.org
Backpatch-through: 13

Branch
------
REL_13_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/5411e821386ce5c9ec794bbc9540c7c4a1acaa46

Modified Files
--------------
contrib/pg_trgm/expected/pg_trgm.out |  3 +++
contrib/pg_trgm/sql/pg_trgm.sql      |  4 ++++
src/backend/commands/indexcmds.c     | 11 +++++++++--
3 files changed, 16 insertions(+), 2 deletions(-)
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