AlterQuery  delta_codec_for_alter (children 2)
 ExpressionList (children 1)
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration x (children 2)
    DataType UInt64
    Function CODEC (children 1)
     ExpressionList (children 2)
      Function Delta
      Function LZ4
 Identifier delta_codec_for_alter
