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-rw-r--r--lib/arel/engines/sql/core_extensions/nil_class.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/arel/engines/sql/core_extensions/nil_class.rb b/lib/arel/engines/sql/core_extensions/nil_class.rb
index 3f70677ba6..d4bb0e4c33 100644
--- a/lib/arel/engines/sql/core_extensions/nil_class.rb
+++ b/lib/arel/engines/sql/core_extensions/nil_class.rb
@@ -4,6 +4,10 @@ module Arel
def equality_predicate_sql
'IS'
end
+
+ def inequality_predicate_sql
+ 'IS NOT'
+ end
def not_predicate_sql
'IS NOT'