CreateQuery background_dict (children 3)
 Identifier background_dict
 ExpressionList (children 2)
  DictionaryAttributeDeclaration metric (children 1)
   DataType String
  DictionaryAttributeDeclaration value (children 1)
   DataType Int64
 Dictionary definition (children 4)
  ExpressionList (children 1)
   Identifier metric
  FunctionWithKeyValueArguments  clickhouse (children 1)
   ExpressionList (children 1)
    pair (children 1)
     Literal \'SELECT metric, value FROM system.metrics WHERE metric LIKE \\\'Background%\\\'\'
  Dictionary lifetime
  Dictionary layout (children 1)
   ExpressionList
