How to iterate every row in JDBC resultset

I always process XML data with the XmlSlurper. Here's some sample code of looping through some dummy JDBC test step data:

import groovy.util.XmlSlurper

def jdbcData = '''<Results>
    <ResultSet fetchSize="10">
        <Row rowNumber="1">
            <CUST_NO>aaa</CUST_NO>
        </Row>
        <Row rowNumber="2">
            <CUST_NO>bbb</CUST_NO>
        </Row>
        <Row rowNumber="3">
            <CUST_NO>ccc</CUST_NO>
        </Row>
    </ResultSet>
</Results>'''

def Results = new XmlSlurper().parseText(jdbcData)

Results.ResultSet.Row.each(){Row ->
	log.info(Row.CUST_NO)
}

As an alternative, without using Groovy, you could use an XML Data Source test step (taking its souce as the response of the JDBC test step), paired with a DataSource Loop Test Step will take care of all the looping functionality.