错误：运算符不存在：整数=字符变化（即使一切都是整数）

Question

我有一个product表，如下所示;

字段如下;

如您所见，除id外，order_id为整数，其余为变量。

当我执行以下查询时，它给出了我无法在order_id字段中比较整数和varchar的错误。

private final static String removeAlternativeProductQuery = "DELETE FROM product where order_id=? AND product_id='?' AND alternative_product_id='?'";

public void removeAlternativeProduct(AlternativeProduct alternativeProduct){

    Query query = em.createNativeQuery(removeAlternativeProductQuery);
    query.setParameter(1, (Integer) alternativeProduct.getOrderId());
    query.setParameter(2, alternativeProduct.getProductId());
    query.setParameter(3, alternativeProduct.getAlternativeProductId());
    query.executeUpdate();

}

与数据库并行，orderId是Integer，其余的是我对象中的String。那我为什么会得到这个演员错误？

为了更清楚，在查询where order_id=?中，左侧是整数。右侧取自

query.setParameter(1, (Integer) alternativeProduct.getOrderId());

也是一个整数。那么这里的字符变化错误在哪里？

完整的错误;

Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.4.1.v20121003-ad44345): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: org.postgresql.util.PSQLException: ERROR: operator does not exist: integer = character varying
  Hint: No operator matches the given name and argument type(s). You might need to add explicit type casts.
  Position: 54
Error Code: 0
Call: DELETE FROM product where order_id=? AND product_id='?' AND alternative_product_id='?'
    bind => [1 parameter bound]
Query: DataReadQuery(sql="DELETE FROM product where order_id=? AND product_id='?' AND alternative_product_id='?'")