logical_select: reduce needless expression creation

groonga · Apr 10, 2017 · a071b5c · a071b5c
1 parent 82a392e
commit a071b5c
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/plugins/sharding/logical_select.rb b/plugins/sharding/logical_select.rb
@@ -440,6 +440,8 @@ def close
 
         def apply(table, condition=nil)
           column = table.create_column(@label, @flags, @type)
+          return if table.empty?
+
           expression = Expression.create(table)
           begin
             expression.parse(@value)