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Call pg_newlocale_from_collation() also with default collation

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Previously, callers of pg_newlocale_from_collation() did not call it
if the collation was DEFAULT_COLLATION_OID and instead proceeded with
a pg_locale_t of 0.  Instead, now we call it anyway and have it return
0 if the default collation was passed.  It already did this, so we
just have to adjust the callers.  This simplifies all the call sites
and also makes future enhancements easier.

After discussion and testing, the previous comment in pg_locale.c
about avoiding this for performance reasons may have been mistaken
since it was testing a very different patch version way back when.

Reviewed-by: Julien Rouhaud <rjuju123@gmail.com>
Discussion: https://www.postgresql.org/message-id/ed3baa81-7fac-7788-cc12-41e3f7917e34@enterprisedb.com
This commit is contained in:
Peter Eisentraut
2022-01-20 09:38:05 +01:00
parent b2a76bb7d0
commit b99ccd2cb2
8 changed files with 135 additions and 132 deletions
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27
src/backend/utils/adt/like_support.c
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@ -1012,24 +1012,23 @@ like_fixed_prefix(Const *patt_const, bool case_insensitive, Oid collation,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("case insensitive matching not supported on type bytea")));
if (!OidIsValid(collation))
{
/*
* This typically means that the parser could not resolve a
* conflict of implicit collations, so report it that way.
*/
ereport(ERROR,
(errcode(ERRCODE_INDETERMINATE_COLLATION),
errmsg("could not determine which collation to use for ILIKE"),
errhint("Use the COLLATE clause to set the collation explicitly.")));
}
/* If case-insensitive, we need locale info */
if (lc_ctype_is_c(collation))
locale_is_c = true;
else if (collation != DEFAULT_COLLATION_OID)
{
if (!OidIsValid(collation))
{
/*
* This typically means that the parser could not resolve a
* conflict of implicit collations, so report it that way.
*/
ereport(ERROR,
(errcode(ERRCODE_INDETERMINATE_COLLATION),
errmsg("could not determine which collation to use for ILIKE"),
errhint("Use the COLLATE clause to set the collation explicitly.")));
}
else
locale = pg_newlocale_from_collation(collation);
}
}
if (typeid != BYTEAOID)