display column header in jasper reports - jasper-reports

Question

Trying to create a jasper report, I can see the data when I export to xls or csv. But column header is missing, not sure whats wrong with it, following is my report. Thanks in Advance.
<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="scireport" language="groovy" printOrder="Horizontal" pageWidth="5000" pageHeight="792" whenNoDataType="AllSectionsNoDetail" columnWidth="4960" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" isIgnorePagination="true">
<property name="ireport.zoom" value="1.0"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<queryString language="SQL">
<![CDATA[select PICKUP_DATE from SCI_PLDDATA_VIEW order by EVENT_TIMESTAMP DESC]]>
</queryString>
<field name="PICKUP_DATE" class="java.sql.Timestamp">
<fieldDescription><![CDATA[]]></fieldDescription>
</field>
<group name="stopid">
<groupHeader>
<band height="50"/>
</groupHeader>
</group>
<columnHeader>
<band height="44" splitType="Stretch">
<textField>
<reportElement x="0" y="0" width="900" height="20"/>
<textElement>
<font size="14" isBold="true"/>
</textElement>
<textFieldExpression class="java.lang.String"><![CDATA[$R{jasper.PICKUP_DATE}]]></textFieldExpression>
</textField>
</band>
</columnHeader>
<detail>
<band height="34" splitType="Stretch">
<textField isStretchWithOverflow="true" pattern="MM-dd-yyyy HH:mm" isBlankWhenNull="true">
<reportElement x="0" y="0" width="900" height="20"/>
<textElement/>
<textFieldExpression class="java.sql.Timestamp"><![CDATA[$F{PICKUP_DATE}]]></textFieldExpression>
</textField>
</band>
</detail>
</jasperReport>

Answer 1

You are fetching data from database , your value will come in field. You should use $F{} instead of $R{} in column header.