SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function JSONExtract (alias a) (children 1)
     ExpressionList (children 3)
      Literal \'{"a": "-123456789012.345"}\'
      Literal \'a\'
      Literal \'Int64\'
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier a