You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: cadencesql.go
    path of file: ./repos/cadence/common/elasticsearch/esql
    
    the code of the file until where you have to start completion: // Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permiss
    
func (e *ESql) ConvertCadence(sql string, domainID string, pagination ...interface{}) (dsl string, sortFields []string, err error) {
	if !e.cadence {
		err = fmt.Errorf(`esql: cadence option not turned on`)
		return "", nil, err
	}
	stmt, err := sqlparser.Parse(sql)
	if err != nil {
		return "", nil, err
	}

	// sql valid, start to handle
	switch stmt := stmt.(type) {
	case *sqlparser.Select:
		dsl, sortFields, err = e.convertSelect(*(stmt), domainID, pagination...)
	default:
		err = fmt.Errorf(`esql: Queries other than select not supported`)
	}

	if err != nil {
		return "", nil, err
	}
	return dsl, sortFields, nil
}