Spring 批处理中的 JdbcPagingItemReader 未给出正确的结果

Question

我面临的问题是，记录从我所做的查询和分页配置中返回，给出了错误的记录数。分页配置是否不正确。分页返回减去记录数。

相当于分页配置的查询

select * from SOME_TABLE where CLIENT_FILE_NM= 'process_abc.20150617024850' AND TXN_ID IS NOT NULL AND SOME_DATA IS NOT NULL order by CREATE_DT ASC;

分页配置

     <bean id="postItemReader"
                class="org.springframework.batch.item.database.JdbcPagingItemReader"
                scope="step">
                <property name="dataSource" ref="dataSource" />
                <property name="queryProvider">
                    <bean
                        class="org.springframework.batch.item.database.support.SqlPagingQueryProviderFactoryBean">
                        <property name="dataSource" ref="dataSource" />
                        <property name="selectClause" value="select *" />
                        <property name="fromClause" value="from SOME_TABLE" />
                        <property name="whereClause"
                            value="CLIENT_FILE_NM= :fileName AND TXN_ID IS NOT NULL AND SOME_DATA IS NOT NULL" />
                        <property name="sortKey" value="CREATE_DT" />
                        <!-- CARD_SETTL_STG_ID_PK ASC -->
                    </bean>
                </property>
                <property name="parameterValues">
                    <map>
                        <entry key="fileName" value="#

{jobParameters['fileName']}" />
                    </map>
                </property>
                <property name="pageSize" value="10" />
                <property name="rowMapper">
                    <bean class="com.wdpr.payment.batch.mapper.OutputVOMapper" />
                </property>
                <property name="saveState" value="false"/>
            </bean>

Answer 1

问题已解决，因为 sortKey 必须是唯一键。Spring按以下格式创建查询： SELECT * FROM (SELECT * FROM CRD_SETTL WHERE CLIENT_FILE_NM= :fileName AND TXN_ID IS NOT NULL AND SETTL_DATA IS NOT NULL ORDER BY CREATE_DT ASC) WHERE ROWNUM <= 10 AND ((CREATE_DT > :_CREATE_DT))

并且记录将会丢失。

<property name="sortKey" value="CREATE_DT" />// 这不是唯一的...