SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 4)
    Literal \'https://www.google.com/search?q=clickhouse+base64+decode&sca_esv=739f8bb380e4c7ed&ei=TfRiZqCDIrmnwPAP2KLRkA8&ved=0ahUKEwjg3ZHitsmGAxW5ExAIHVhRFPIQ4dUDCBA&uact=5&oq=clickhouse+base64+decode\' (alias original)
    Function base64URLEncode (alias encoded) (children 1)
     ExpressionList (children 1)
      Identifier original
    Function base64URLDecode (children 1)
     ExpressionList (children 1)
      Identifier encoded
    Function tryBase64URLDecode (children 1)
     ExpressionList (children 1)
      Identifier encoded
