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amazon-web-services - AWS Athena JDBC PreparedStatement

问题描述

我无法使 AWS Athena JDBC 驱动程序与 PreparedStatement 和绑定变量一起使用。如果我将所需的列值直接放在 SQL 字符串中，它就可以工作。但是如果我使用占位符'？我将变量与 PreparedStatement 的设置器绑定，它不起作用。当然，我们知道我们必须使用第二种方法（用于缓存，避免 SQL 注入等）。

我使用 JDBC 驱动程序 AthenaJDBC42_2.0.2.jar。尝试使用占位符 '?' 时出现以下错误 在 SQL 字符串中。当我从 JDBC 连接获取 PreparedStatement 时，会引发错误。它抱怨找不到参数。但是我在代码中设置了它们。在获取 PreparedStatement 之前如何设置参数:-)？

java.sql.SQLException: [Simba][AthenaJDBC](100071) An error has been thrown from the AWS Athena client. SYNTAX_ERROR: line 1:1: Incorrect number of parameters: expected 1 but found 0

at com.simba.athena.athena.api.AJClient.executeQuery(Unknown Source)
at com.simba.athena.athena.dataengine.AJQueryExecutor.<init>(Unknown Source)
at com.simba.athena.athena.dataengine.AJDataEngine.prepare(Unknown Source)
at com.simba.athena.jdbc.common.SPreparedStatement.<init>(Unknown Source)
at com.simba.athena.jdbc.jdbc41.S41PreparedStatement.<init>(Unknown Source)
at com.simba.athena.jdbc.jdbc42.S42PreparedStatement.<init>(Unknown Source)
at com.simba.athena.jdbc.jdbc42.JDBC42ObjectFactory.createPreparedStatement(Unknown Source)
at com.simba.athena.athena.jdbc42.AJJDBC42ObjectFactory.createPreparedStatement(Unknown Source)
at com.simba.athena.jdbc.common.SConnection.prepareStatement(Unknown Source)
at com.simba.athena.jdbc.common.SConnection.prepareStatement(Unknown Source)
at ****************************************************
Caused by: com.simba.athena.support.exceptions.GeneralException: [Simba][AthenaJDBC](100071) An error has been thrown from the AWS Athena client. SYNTAX_ERROR: line 1:1: Incorrect number of parameters: expected 1 but found 0
... 37 more

难道我做错了什么 ？这是代码

    @Test
public void testWhichFails() throws SQLException {
    try (Connection connection = athenaConnexion()) {
        String sql = "select * from my_table where col = ? limit 10";
        try (PreparedStatement ps = connection.prepareStatement(sql)) {
            ps.setInt(1, 30);
            try (ResultSet rs = ps.executeQuery()) {
                while (rs.next()) {
                    System.out.println("rs.getString(1) = " + rs.getString(1));
                }
            }
        }
    }
}

@Test
public void testWhichWorks() throws SQLException {
    try (Connection connection = athenaConnexion()) {
        String sql = "select * from my_table where col = 30 limit 10";
        try (PreparedStatement ps = connection.prepareStatement(sql)) {
            //ps.setInt(1, 30);
            try (ResultSet rs = ps.executeQuery()) {
                while (rs.next()) {
                    System.out.println("rs.getString(1) = " + rs.getString(1));
                }
            }
        }
    }
}

标签： amazon-web-servicesjdbcamazon-athena

解决方案

Athena 仅支持此处列出的 SQL 函数Athena SQL 函数又基于Functions and Operators Presto 版本 0.172，并具有以下Athena 的 SQL 相关限制列表。新版 Presto Presto 文档中可以使用准备好的语句。但是，Athena 还不支持这个新版本。您可以随时写信给 Athena 支持团队，要求添加 PREPARE 功能。

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