diff options
Diffstat (limited to 'src/backend/utils/adt/varlena.c')
| -rw-r--r-- | src/backend/utils/adt/varlena.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/backend/utils/adt/varlena.c b/src/backend/utils/adt/varlena.c index 8a7a3cf45bf..3587fe45951 100644 --- a/src/backend/utils/adt/varlena.c +++ b/src/backend/utils/adt/varlena.c @@ -1302,7 +1302,20 @@ varstr_cmp(char *arg1, int len1, char *arg2, int len2, Oid collid) pg_locale_t mylocale = 0; if (collid != DEFAULT_COLLATION_OID) + { + if (!OidIsValid(collid)) + { + /* + * 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 string comparison"), + errhint("Use the COLLATE clause to set the collation explicitly."))); + } mylocale = pg_newlocale_from_collation(collid); + } #ifdef WIN32 /* Win32 does not have UTF-8, so we need to map to UTF-16 */ |