XPATH assertion for an expression containing another value, field length, field type and is not NULL

Below groovy script does what you needed.

It is taken one positive Row and a negative Row for the sake of test evaluation.

/**
* this class holds the all 4 assertions result along with its rowNumber
**/
class AssertionResult {
  def rowNumber
  def failures
}

/**
* below method will validates each row and returns AssertionResult object
**/
def validateRow(row) {
   def number = row.@rowNumber
   def barCode = row.BARCODE.text()
   def trackingNumber = row.TRACKINGNUMBER.text()
   def tempResult = new AssertionResult(rowNumber: number, failures: null)
   StringBuffer tempFailure = new StringBuffer()
   if (!barCode.contains(trackingNumber)) {
      tempFailure.append("Bar code does not contain Tracking number\n")
   }
   if (!row.ISCANCELLED.text()) {
      tempFailure.append("Is cancelled empty\n")
   }
   if (!(row.PIECEID ==~ "\\d{7}")){
      tempFailure.append("PieceId is not of 7 digits long\n")
   }
   def billable
   try { 
       billable = row.ISBILLABLE.text() as Long
       if (!(billable instanceof java.lang.Long)) {
           tempFailure.append("Is billable is not a number\n")
       }
   } catch (NumberFormatException e) {
      tempFailure.append("Is billable is not a number\n")
   }   
   if (tempFailure) {
      tempResult.failures = tempFailure.toString()
   }
   tempResult
}


/**
* below is the sample result set
* you may directly assign the response from jdbc test step here later
**/
def jdbcResponse = '''
<Results>
    <ResultSet fetchSize="128">
        <Row rowNumber="1">
            <PIECEID>1820480</PIECEID>
            <CONSIGNMENTID>1166645</CONSIGNMENTID>
            <TRACKINGNUMBER>907598985733</TRACKINGNUMBER>
            <BARCODE>001390759898573373</BARCODE>
            <ISBILLABLE>1</ISBILLABLE>
            <ISCANCELLED>0</ISCANCELLED>
        </Row>
        <Row rowNumber="2">
            <PIECEID>18204811</PIECEID>
            <CONSIGNMENTID>1166646</CONSIGNMENTID>
            <TRACKINGNUMBER>907598985734</TRACKINGNUMBER>
            <BARCODE>001390759898573375</BARCODE>
            <ISBILLABLE>a</ISBILLABLE>
            <ISCANCELLED/>
        </Row>
    </ResultSet>
</Results>'''
def results = new XmlSlurper().parseText(jdbcResponse)
def assertionResults = []

/**
* looping thru each Row and validating the row data and 
* collecting result into a list
**/
results.ResultSet.Row.each {
   assertionResults.add(validateRow(it))
}

/**
* check the validation result and log errors if any
* and then finally show if the resultset data is passed the 
* mentioned 4 conditions or not
**/
def finalResult = true
assertionResults.each { res ->
  if (res.failures) {
    finalResult = false
    log.error "Row number ${res.rowNumber} has assertion errors:\n ${res.failures}"
  }
}

assert finalResult, "The data verification on ResultSet has failures as logged above"
​

Note: The reason for using if conditions in validateRow() method becuase, it will stop the assertions on first failure and rest of the verification is not done. 

You may see error something like shown below

JdbcVerification