java - 通过 Java 调用 PL\SQL：将参数注册为布尔值

Question

我在 Java 应用程序中调用 PL/SQL 过程来更新数据库条目。

Connection connection = null;
CallableStatement preparedCall = null;
Integer result = 0;
preparedCall = connection.prepareCall("{ ?= call pkg_temp.update_data(?, ?)}");
preparedCall.registerOutParameter(1, OracleTypes.BOOLEAN);
preparedCall.setString(2, variable1);
preparedCall.setString(3, cariable2);
result = preparedCall.executeUpdate();

但我在 executeUpdate() 收到以下错误

Severe: java.sql.SQLException: ORA-06550: line 1, column 13: PLS-00382: expression is of wrong type ORA-06550: line 1, column 7: PL/SQL: Statement ignored

原因：PL\SQL 不允许我注册到不是主要类型的 Boolean 类型。

我怎样才能调用这个函数？

Answer 1

最后设法编写一个包装器来获取布尔值并返回一个像这样的整数。

Connection connection = null;
CallableStatement preparedCall = null;
Integer result = 0;
preparedCall = connection.prepareCall(
                    "BEGIN " +
                    " ?:= CASE pkg_temp.update_data(?, ?) "+
                    " WHEN TRUE THEN 1 " +  " ELSE 0 " +
                    " END; " +
                    "END; "
                    );
preparedCall.registerOutParameter(1, OracleTypes.INTEGER);
preparedCall.setString(2, variable1);
preparedCall.setString(3, variable2);
result = preparedCall.executeUpdate();
int funcRetValue = preparedCall.getInt(1);
if (funcRetValue == 1) {
    retValue = true;
} else {
    retValue = false;
}