private String quote(String value) {
        if (value == null) {
            return "'null'";
        }
        if (!value.startsWith(APOSTROPHE) && !value.startsWith(DOUBLE_QUOTES)) {
            return String.format("'%s'", value);
        }
        return value;
    }
Build the statement of AddColumn

@param alterColumns The list of AlterColumn
@return A statement of AddColumn
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/doris/src/main/java/org/apache/inlong/sort/doris/schema/OperationHelper.java