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-rw-r--r--activerecord/lib/active_record/relation/merger.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/relation/merger.rb b/activerecord/lib/active_record/relation/merger.rb
index a65ef1898a..c114ea0c0d 100644
--- a/activerecord/lib/active_record/relation/merger.rb
+++ b/activerecord/lib/active_record/relation/merger.rb
@@ -131,6 +131,8 @@ module ActiveRecord
end
def filter_binds(lhs_binds, removed_wheres)
+ return lhs_binds if removed_wheres.empty?
+
set = Set.new removed_wheres.map { |x| x.left.name }
lhs_binds.dup.delete_if { |col,_| set.include? col.name }
end