Using Table component: How to avoid displaying multiple copies of same data - jasper-reports

Question

The iReport is generating multiple (identical) tables for the query I am submitting.
I am trying to extract all data from the manga DB table into a Table component. I successfully does so but is creating multiple tables with the same data.
<?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="mangaReport" language="groovy" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="43bb2d5b-ad44-48ca-bcc9-bec319a36466">
<property name="ireport.zoom" value="1.0"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<style name="table">
<box>
<pen lineWidth="1.0" lineColor="#000000"/>
</box>
</style>
<style name="table_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table 1">
<box>
<pen lineWidth="1.0" lineColor="#000000"/>
</box>
</style>
<style name="table 1_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table 1_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table 1_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<subDataset name="New Dataset 1" uuid="820ac89b-615e-453d-9593-9deeb8c44a87">
<queryString language="SQL">
<![CDATA[select * from manga]]>
</queryString>
<field name="name" class="java.lang.String"/>
<field name="author" class="java.lang.String"/>
</subDataset>
<queryString language="SQL">
<![CDATA[select * from manga]]>
</queryString>
<field name="name" class="java.lang.String"/>
<field name="author" class="java.lang.String"/>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="39" splitType="Stretch"/>
</title>
<pageHeader>
<band height="18" splitType="Stretch"/>
</pageHeader>
<columnHeader>
<band height="31" splitType="Stretch"/>
</columnHeader>
<detail>
<band height="125" splitType="Stretch">
<componentElement>
<reportElement uuid="4f76c19e-e304-45b3-a521-b30aa4ecb03e" key="table 1" style="table 1" x="185" y="34" width="360" height="50"/>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="New Dataset 1" uuid="9f479053-64b3-49a7-a986-2415ac20385f">
<connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>
</datasetRun>
<jr:column uuid="5b10c367-6de0-4799-8408-ad8c7dadd888" width="90">
<jr:columnHeader style="table 1_CH" height="30">
<staticText>
<reportElement uuid="7470c697-d500-46e0-88c1-d42883576ef1" x="0" y="0" width="90" height="30"/>
<textElement/>
<text><![CDATA[name]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="table 1_TD" height="20">
<textField>
<reportElement uuid="32a30162-dca0-4bda-8ef2-ae8f41d4340a" x="0" y="0" width="90" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{name}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column uuid="3f6fac9d-5a87-4fee-ac81-51170b6d7481" width="90">
<jr:columnHeader style="table 1_CH" height="30">
<staticText>
<reportElement uuid="21335524-5b94-464b-83fc-36d7734596e4" x="0" y="0" width="90" height="30"/>
<textElement/>
<text><![CDATA[author]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="table 1_TD" height="20">
<textField>
<reportElement uuid="9765da67-b578-4bc3-b0f4-5878c64b9e66" x="0" y="0" width="90" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{author}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</detail>
<columnFooter>
<band height="45" splitType="Stretch"/>
</columnFooter>
<pageFooter>
<band height="54" splitType="Stretch"/>
</pageFooter>
<summary>
<band height="42" splitType="Stretch"/>
</summary>
I tried to search the forums but couldn't find the solution.
Please advice

Answer 1

The reason of this issue that JR engine iterates the table twice - first time using the main datasource (report's datasource) with Detail band and the second time with Table component's datasource.
You can delete the main datasource and put the Table component to the Summary band, for example.
In this case your template will be like this:
<?xml version="1.0" encoding="UTF-8"?>
<jasperReport .. whenNoDataType="AllSectionsNoDetail" ..>
<style name="table">
<box>
<pen lineWidth="1.0" lineColor="#000000"/>
</box>
</style>
<style name="table_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table 1">
<box>
<pen lineWidth="1.0" lineColor="#000000"/>
</box>
</style>
<style name="table 1_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table 1_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table 1_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<subDataset name="New Dataset 1" uuid="820ac89b-615e-453d-9593-9deeb8c44a87">
<queryString language="SQL">
<![CDATA[select name, author from address]]>
</queryString>
<field name="name" class="java.lang.String"/>
<field name="author" class="java.lang.String"/>
</subDataset>
<title>
<band height="39" splitType="Stretch"/>
</title>
<detail>
<band height="125" splitType="Stretch"/>
</detail>
<summary>
<band height="63" splitType="Stretch">
<componentElement>
<reportElement uuid="4f76c19e-e304-45b3-a521-b30aa4ecb03e" key="table 1" style="table 1" x="131" y="0" width="360" height="50"/>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="New Dataset 1" uuid="9f479053-64b3-49a7-a986-2415ac20385f">
<connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>
</datasetRun>
<jr:column uuid="5b10c367-6de0-4799-8408-ad8c7dadd888" width="90">
<jr:columnHeader style="table 1_CH" height="30">
<staticText>
<reportElement uuid="7470c697-d500-46e0-88c1-d42883576ef1" x="0" y="0" width="90" height="30"/>
<textElement/>
<text><![CDATA[name]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="table 1_TD" height="20">
<textField>
<reportElement uuid="32a30162-dca0-4bda-8ef2-ae8f41d4340a" x="0" y="0" width="90" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{name}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column uuid="3f6fac9d-5a87-4fee-ac81-51170b6d7481" width="90">
<jr:columnHeader style="table 1_CH" height="30">
<staticText>
<reportElement uuid="21335524-5b94-464b-83fc-36d7734596e4" x="0" y="0" width="90" height="30"/>
<textElement/>
<text><![CDATA[author]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="table 1_TD" height="20">
<textField>
<reportElement uuid="9765da67-b578-4bc3-b0f4-5878c64b9e66" x="0" y="0" width="90" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{author}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</summary>
</jasperReport>
Do not forget to set whenNoDataType report's property as AllSectionsNoDetail in this case - to avoid the hiding Summary band.
Another way - you can remove Table component and use Detail band.
In this case the template will be like this:
<?xml version="1.0" encoding="UTF-8"?>
<jasperReport ...>
<style name="table">
<box>
<pen lineWidth="1.0" lineColor="#000000"/>
</box>
</style>
<style name="table_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table 1">
<box>
<pen lineWidth="1.0" lineColor="#000000"/>
</box>
</style>
<style name="table 1_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table 1_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table 1_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<queryString language="SQL">
<![CDATA[select name, author from address]]>
</queryString>
<field name="name" class="java.lang.String"/>
<field name="author" class="java.lang.String"/>
<title>
<band height="39" splitType="Stretch"/>
</title>
<columnHeader>
<band height="30">
<staticText>
<reportElement uuid="21335524-5b94-464b-83fc-36d7734596e4" style="table 1_CH" x="90" y="0" width="90" height="30"/>
<textElement/>
<text><![CDATA[author]]></text>
</staticText>
<staticText>
<reportElement uuid="7470c697-d500-46e0-88c1-d42883576ef1" style="table 1_CH" x="0" y="0" width="90" height="30"/>
<textElement/>
<text><![CDATA[name]]></text>
</staticText>
</band>
</columnHeader>
<detail>
<band height="20" splitType="Stretch">
<textField>
<reportElement uuid="9765da67-b578-4bc3-b0f4-5878c64b9e66" style="table 1_TD" x="90" y="0" width="90" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{name}]]></textFieldExpression>
</textField>
<textField>
<reportElement uuid="32a30162-dca0-4bda-8ef2-ae8f41d4340a" style="table 1_TD" x="0" y="0" width="90" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{author}]]></textFieldExpression>
</textField>
</band>
</detail>
</jasperReport>