Question

我想在informix数据库中检索存储过程的结果，这是我的代码：

Connection connection = session.connection();
callableStatement = connection.prepareCall("{? = call my_stored_procedure()}");
***callableStatement.registerOutParameter(1, Types.VARCHAR);***
callableStatement.registerOutParameter(2, java.sql.Types.VARCHAR);
callableStatement.registerOutParameter(3, java.sql.Types.INTEGER);

问题是第一个registerOutParameter不起作用并抛出此异常： java.sql.SQLException: [BEA][Informix JDBC Driver]Invalid parameter binding(s)

我该怎么办？

Answer 1

您似乎不能使用registerOutParameter()来读取功能结果。您可以使用resultSet，而不是这样：

#!/usr/bin/env jython
# -*- coding: utf8 -*-

import sys
import traceback

from java.sql import DriverManager, Types
from java.lang import Class

Class.forName("com.informix.jdbc.IfxDriver")


FUN_BODY = """CREATE FUNCTION get_ver() RETURNING VARCHAR(200);
    RETURN 'ver 1.12';
END FUNCTION;"""


def test_init(db):
    c = db.createStatement()
    try:
        c.execute('DROP FUNCTION get_ver;')
    except:
        pass
    c.execute(FUN_BODY)


def test_call(db):
    try:
        print("\n\n--------------\ncall...")
        proc = db.prepareCall("{ ? = call get_ver() }")
        rs = proc.executeQuery()
        while (rs.next()):
            r = rs.getString(1)
            print('result: %s' % (r))
    except:
        print("there were errors!")
        s = traceback.format_exc()
        sys.stderr.write("%s\n" % (s))


def test_exec(db):
    try:
        print("\n\n--------------\nEXECUTE PROCEDURE...")
        c = db.createStatement()
        rs = c.executeQuery("EXECUTE PROCEDURE get_ver()")
        while (rs.next()):
            r = rs.getString(1)
            print('result: %s' % (r))
    except:
        print("there were errors!")
        s = traceback.format_exc()
        sys.stderr.write("%s\n" % (s))


def test(db_url, usr, passwd):
    print("\n\n%s\n" % (db_url))
    db = DriverManager.getConnection(db_url, usr, passwd)
    test_init(db)
    test_call(db)
    test_exec(db)
    db.close()


test('jdbc:informix-sqli://test-informix:9088/testifx:informixserver=ol_testifx;DB_LOCALE=pl_PL.CP1250;CLIENT_LOCALE=pl_PL.CP1250;charSet=CP1250', 'user', 'passwd')
test('jdbc:odbc:[system_dsn]', 'user', 'passwd')

我的结果：

jdbc:informix-sqli://test-informix....
--------------
call...
result: ver 1.12


--------------
EXECUTE PROCEDURE...
result: ver 1.12

如何从jdbc获取informix storedprocedure的结果？

1 个答案: