'Executes the sqlString as SQL commands.
SQL commands are expected to be delimited by a semi-colon (\';\').
Usage:
${output}=  Execute sql string  select site_id from org_site where name = "Station 13";
Log to console  ${output}
{\'site_id\': 50}]'

@staticmethod
def execute_sql_string(sql_string):

    db = current.db
    s3db = current.s3db
    logger.info(('Executing    query    %s' % sql_string))
    output = db.executesql(sql_string, as_dict=True)
    db.commit()
    return output
