Java 使用PostgreSQL函数游标错误的Spring批处理ItemReader

我需要让Spring批处理ItemReader使用PostgreSQL函数作为数据源，但我没有成功（PostgreSQL数据库在Greenplum设备中）。我创建了一个ItemReader调用PostgreSQL函数的示例，该函数返回一个游标，但ItemReader无法声明游标不存在。以下是我的设置的所有组件：

-数据库表和数据：

CREATE TABLE test_user
(
    test_user_sys_id numeric NOT NULL,
    ssn character varying(9) NOT NULL,
    create_user_id character varying(30) NOT NULL,
    create_ts timestamp(6) without time zone NOT NULL DEFAULT now()
)
WITH (
OIDS=FALSE
)
DISTRIBUTED BY (ssn);

INSERT INTO test_user (test_user_sys_id, ssn, create_user_id)  VALUES (1,'111111111','DataAdmin');
INSERT INTO test_user (test_user_sys_id, ssn, create_user_id)  VALUES (2,'222222222','DataAdmin');
INSERT INTO test_user (test_user_sys_id, ssn, create_user_id)  VALUES (3,'333333333','DataAdmin');

-数据库功能：

CREATE or REPLACE FUNCTION get_user_func_no_arg(
    p_id_min NUMERIC        -- Minimum ID value
)
RETURNS REFCURSOR 
AS

$BODY$
DECLARE
    resultCursor REFCURSOR := 'resultCursor';
BEGIN
    OPEN resultCursor FOR

    SELECT test_user_sys_id, ssn
    FROM test_user
    WHERE test_user_sys_id > p_id_min;

    RETURN resultCursor;
END;
$BODY$
LANGUAGE plpgsql VOLATILE;

package dao.setter;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import org.springframework.jdbc.core.PreparedStatementSetter;

// Spring Batch PreparedStatementSetter to set parameters for stored procedures
public class TestUserPreparedStatementSetter implements PreparedStatementSetter {

    private int minId;

    // Setters
    public void setMinId(int minId) {
        this.minId = minId;
    }

    // Set the parameters for the stored procedure
    public void setValues(PreparedStatement ps) throws SQLException {
        CallableStatement cs = (CallableStatement) ps;
        cs.setInt(1, this.minId);

        cs.registerOutParameter(2, java.sql.Types.OTHER);
    }
}

-localLaunchContext.xml（特定于环境的信息）：

-TestUserPreparedStatementSetter.java（将输入参数设置为PostgreSQL函数）：

-TestUserRowMapper.java（将ItemReader光标行映射到TestUser数据对象）：

当我运行此操作时，会出现以下错误：

Caused by: org.postgresql.util.PSQLException: ERROR: cursor "resultCursor" does not exist
    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2198)
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1927)
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:561)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:405)
    at org.postgresql.jdbc2.AbstractJdbc2Connection.execSQLQuery(AbstractJdbc2Connection.java:363)
    at org.postgresql.jdbc2.AbstractJdbc2ResultSet.internalGetObject(AbstractJdbc2ResultSet.java:207)
    at org.postgresql.jdbc3.AbstractJdbc3ResultSet.internalGetObject(AbstractJdbc3ResultSet.java:36)
    at org.postgresql.jdbc4.AbstractJdbc4ResultSet.internalGetObject(AbstractJdbc4ResultSet.java:300)
    at org.postgresql.jdbc2.AbstractJdbc2ResultSet.getObject(AbstractJdbc2ResultSet.java:2704)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:456)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:412)
    at org.springframework.batch.item.database.StoredProcedureItemReader.openCursor(StoredProcedureItemReader.java:205)
    ... 29 more

我反复尝试将REFCURSOR指定为函数的输出参数以及其他许多事情，但没有成功。这是使用JDK1.7、PostgreSQL JDBC驱动程序JAR PostgreSQL-9.3-1102.jdbc4和PostgreSQL 8.2.15（在Greenplum 4.2.8.1构建2下）实现的

---

欢迎提出任何建议。提前感谢。

经过大量调查，我找到了修复方法-将数据源更改为支持禁用自动提交的数据源：

<!-- Define the PostgreSQL source -->
<bean id="postgresql_dataSource"
    class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="org.postgresql.Driver"/>
    <property name="url" value="THE URL"/>
    <property name="username" value="THE USER"/>
    <property name="password" value="THE PASSWORD"/>
    <property name="defaultAutoCommit" value="false"/>
</bean>

package dao.setter;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import org.springframework.jdbc.core.PreparedStatementSetter;

// Spring Batch PreparedStatementSetter to set parameters for stored procedures
public class TestUserPreparedStatementSetter implements PreparedStatementSetter {

    private int minId;

    // Setters
    public void setMinId(int minId) {
        this.minId = minId;
    }

    // Set the parameters for the stored procedure
    public void setValues(PreparedStatement ps) throws SQLException {
        CallableStatement cs = (CallableStatement) ps;
        cs.setInt(1, this.minId);

        cs.registerOutParameter(2, java.sql.Types.OTHER);
    }
}

package dao.mapper;

import java.sql.ResultSet;
import java.sql.SQLException;

import org.springframework.jdbc.core.RowMapper;

import domain.TestUser;

//Spring RowMapper to support stored procedure results
public class TestUserRowMapper  implements RowMapper<TestUser>{

    // Map the results to the DAO
    public TestUser mapRow(ResultSet resultSet, int rowNum) throws SQLException
    {
        TestUser resultData = new TestUser();
        resultData.setId(resultSet.getInt(1));
        resultData.setSsn(resultSet.getString(2));

        return resultData;
    }
}

java -classpath ".;lib\*;bin" org.springframework.batch.core.launch.support.CommandLineJobRunner localLaunchContext.xml TestUserJob minId=1

Caused by: org.postgresql.util.PSQLException: ERROR: cursor "resultCursor" does not exist
    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2198)
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1927)
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:561)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:405)
    at org.postgresql.jdbc2.AbstractJdbc2Connection.execSQLQuery(AbstractJdbc2Connection.java:363)
    at org.postgresql.jdbc2.AbstractJdbc2ResultSet.internalGetObject(AbstractJdbc2ResultSet.java:207)
    at org.postgresql.jdbc3.AbstractJdbc3ResultSet.internalGetObject(AbstractJdbc3ResultSet.java:36)
    at org.postgresql.jdbc4.AbstractJdbc4ResultSet.internalGetObject(AbstractJdbc4ResultSet.java:300)
    at org.postgresql.jdbc2.AbstractJdbc2ResultSet.getObject(AbstractJdbc2ResultSet.java:2704)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:456)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:412)
    at org.springframework.batch.item.database.StoredProcedureItemReader.openCursor(StoredProcedureItemReader.java:205)
    ... 29 more

<!-- Define the PostgreSQL source -->
<bean id="postgresql_dataSource"
    class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="org.postgresql.Driver"/>
    <property name="url" value="THE URL"/>
    <property name="username" value="THE USER"/>
    <property name="password" value="THE PASSWORD"/>
    <property name="defaultAutoCommit" value="false"/>
</bean>