DescribeQuery (children 1)
 TableExpression (children 1)
  Function format (children 1)
   ExpressionList (children 2)
    Identifier JSONEachRow
    Literal \'{"obj" : [{"a" : 42, "b" : "Hello", "c" : [1,2,3]}, {"a" : 43, "b" : "World", "d" : "2020-01-01"}]}, {"obj" : [{}]}\'
