Java使用prepared语句调用用户定义的表函数DB2

我正在用Java 6 EE和DB2开发一个web应用程序。我创建了一个table函数，它接收3个参数并返回一个表

CREATE FUNCTION MY_FUNCTION (PARAM1 VARCHAR(5), PARAM2 VARCHAR(10), PARAM3 INTEGER)
RETURNS TABLE (
    FIELD1 VARHCHAR(5),
    FIELD2 VARCHAR(10),
    FIELD3 INTEGER
)
RETURN 
SELECT FIELD1, FIELD2, FIELD3 
FROM TABLE_1 WHERE FIELD1 = PARAM1 || '_MAIN' 
AND FIELD2 = PARAM2 || '_MAIL' AND FIELD3 = PARAM3 + 47

我正在尝试用Java执行一个函数，准备语句如下（使用通配符）：

但是当我运行代码时，我在准备好的语句中得到了一个SQLSyntaxErrorException：

java.sql.SQLSyntaxErrorException: [SQL0418] A statement contains a use of a parameter marker that is not valid
       at com.ibm.as400.access.JDError.createSQLExceptionSubClass(JDError.java:828)
       at com.ibm.as400.access.JDError.throwSQLException(JDError.java:699)
       at com.ibm.as400.access.JDError.throwSQLException(JDError.java:669)
       at com.ibm.as400.access.AS400JDBCStatement.commonPrepare(AS400JDBCStatement.java:1660)
       at com.ibm.as400.access.AS400JDBCPreparedStatement.<init>(AS400JDBCPreparedStatement.java:248)
       at com.ibm.as400.access.AS400JDBCCallableStatement.<init>(AS400JDBCCallableStatement.java:120)
       at com.ibm.as400.access.AS400JDBCConnection.prepareCall(AS400JDBCConnection.java:1840)
       at com.ibm.as400.access.AS400JDBCConnection.prepareCall(AS400JDBCConnection.java:1741)

我想要实现的是使用通配符调用函数，以改进函数的处理

提前谢谢

带有@user384842答案的解决方案

PreparedStatement stmt = conn.prepareStatement("SELECT * FROM TABLE(MY_FUNCTION(cast(? as VARCHAR(5)), cast(? as VARCHAR(10)), cast(? as INTEGER))) AS TABLE");

---

在谷歌上搜索了一下之后，看起来你需要将它们转换成合适的类型？我发现了以下文档：

requiresCastingOfParametersInSelectClause() 
DB2 in fact does require that parameters appearing in the select clause be wrapped in cast() calls to tell the DB parser the type of the select value.

在这里：

不确定是否相关，但可能值得一试？我猜它看起来像是

cast（？as varchar（30））

---

这里有关于演员的链接

正是我想要的。谢谢

PreparedStatement stmt = conn.prepareStatement("SELECT * FROM TABLE(MY_FUNCTION(cast(? as VARCHAR(5)), cast(? as VARCHAR(10)), cast(? as INTEGER))) AS TABLE");

requiresCastingOfParametersInSelectClause() 
DB2 in fact does require that parameters appearing in the select clause be wrapped in cast() calls to tell the DB parser the type of the select value.