Add missing check_collation_set call to bpcharne().
We should throw an error for indeterminate collation, but bpcharne()
was missing that logic, resulting in a much less user-friendly error
(either an assertion failure or "cache lookup failed for collation 0").
Per report from Manuel Rigger. Back-patch to v12 where the mistake
came in, evidently in commit 5e1963fb7
. (Before non-deterministic
collations, this function wasn't collation sensitive.)
Discussion: https://postgr.es/m/CA+u7OA4HOjtymxAbuGNh4-X_2R0Lw5n01tzvP8E5-i-2gQXYWA@mail.gmail.com
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@ -784,6 +784,8 @@ bpcharne(PG_FUNCTION_ARGS)
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bool result;
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Oid collid = PG_GET_COLLATION();
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check_collation_set(collid);
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len1 = bcTruelen(arg1);
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len2 = bcTruelen(arg2);
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