AlterQuery  test_alter_decimal (children 2)
 ExpressionList (children 1)
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration d (children 1)
    DataType Decimal (children 1)
     ExpressionList (children 2)
      Literal UInt64_18
      Literal UInt64_8
 Identifier test_alter_decimal
