jdbc - 如何在 Snowflake JDBC 中执行批量更新

Question

我正在尝试对 PreparedStatement 执行雪花批处理更新，但没有成功。我能够执行每个单独的查询 (preparedStatement.executeQuery())，以便查询工作。但是一旦我切换到 batchUpdate()，我就会遇到一个异常，似乎它没有设置我的变量(在 insertEventStatement.executeBatch() 处抛出)。

net.snowflake.client.jdbc.SnowflakeSQLException: SQL compilation error: error line 1 at position 134
Bind variable ? not set.
at net.snowflake.client.jdbc.SnowflakeUtil.checkErrorAndThrowException(SnowflakeUtil.java:88)
at net.snowflake.client.core.StmtUtil.execute(StmtUtil.java:384)
at net.snowflake.client.core.SFStatement.executeHelper(SFStatement.java:421)
at net.snowflake.client.core.SFStatement.executeQueryInternal(SFStatement.java:240)
at net.snowflake.client.core.SFStatement.executeQuery(SFStatement.java:180)
at net.snowflake.client.core.SFStatement.executeQuery(SFStatement.java:152)
at net.snowflake.client.core.SFStatement.execute(SFStatement.java:637)
at net.snowflake.client.jdbc.SnowflakeStatementV1.executeUpdateInternal(SnowflakeStatementV1.java:135)
at net.snowflake.client.jdbc.SnowflakePreparedStatementV1.executeBatch(SnowflakePreparedStatementV1.java:1045)

有人看到我可能遗漏了什么吗？

public void insertBotEvents(List<SnowflakeRecord> snowflakeRecords) throws SQLException
{
    try
    {
        PreparedStatement insertEventStatement = connection.prepareStatement(INSERT_EVENT);
        PreparedStatement insertMetaEventStatement = connection.prepareStatement(INSERT_META_EVENT);
        for (SnowflakeRecord snowflakeRecord : snowflakeRecords)
        {
            insertEventStatement.setString(1, snowflakeRecord.getUserId());
            insertEventStatement.setString(2, snowflakeRecord.getSessionId());
            insertEventStatement.setString(3, snowflakeRecord.getEventTime().toString());
            insertEventStatement.setString(4, snowflakeRecord.getEventType());
            insertEventStatement.setString(5, snowflakeRecord.getEventValue());
            insertEventStatement.setString(6, snowflakeRecord.getAdditionalInfo());
            insertEventStatement.setString(7, snowflakeRecord.getAffiliateName());

            System.out.println("\nINSERTING NEW RECORD: \n" + snowflakeRecord);

            insertEventStatement.addBatch();

            if (snowflakeRecord.getSmVuiEventDto() != null && snowflakeRecord.getSmVuiEventDto().getParameters() != null)
            {
                for (ParametersDto parametersDto : snowflakeRecord.getSmVuiEventDto().getParameters())
                {

                    insertMetaEventStatement.setString(1, snowflakeRecord.getSmVuiEventDto().getName());
                    insertMetaEventStatement.setString(2, parametersDto.getName());
                    insertMetaEventStatement.setString(3, parametersDto.getValue());
                    insertMetaEventStatement.setString(4, snowflakeRecord.getUserId());
                    insertMetaEventStatement.setString(5, snowflakeRecord.getSessionId());
                    insertMetaEventStatement.setString(6, snowflakeRecord.getEventTime().toString());
                    insertMetaEventStatement.setString(7, snowflakeRecord.getEventType());
                    insertMetaEventStatement.setString(8, snowflakeRecord.getEventValue());
                    insertMetaEventStatement.setString(9, snowflakeRecord.getAdditionalInfo());

                    insertMetaEventStatement.addBatch();
                }
            }
        }
        insertEventStatement.executeBatch();
        insertMetaEventStatement.executeBatch();
        System.out.println("\nCommitting changes to snowflake.");
        connection.commit();
    }
    catch (Exception e)
    {
        connection.rollback();
        System.err.println("Unable to execute SQL. Rolling back snowflake import");
        e.printStackTrace();
        throw e;
    }

}

查询如下:

private static final String INSERT_EVENT =
        "INSERT INTO EVENT " +
                "(USER_ID, " +
                " SESSION_ID, " +
                " EVENT_DATETIME, " +
                " EVENT_TYPE, " +
                " EVENT_VALUE, " +
                " ADDITIONAL_INFO, " +
                " AFFILIATE_ID " +
                ") " +
                "SELECT " +
                " ?, " +
                " ?, " +
                " ?, " +
                " ?, " +
                " ?, " +
                " ?, " +
                " AFFILIATE_ID " +
                "FROM AFFILIATE_LOOKUP " +
                "WHERE AFFILIATE_NAME = ?";

private static final String INSERT_META_EVENT =
        "INSERT INTO EVENT_META " +
        "(EVENT_ID, " +
        "   META_TYPE, " +
        "   META_NAME, " +
        "   META_VALUE " +
        ") " +
        "SELECT EVENT_ID, ?, ?, ? " +
        "FROM SM_VUI_EVENT " +
        "WHERE USER_ID=? AND " +
        "   SESSION_ID=? AND " +
        "   EVENT_DATETIME=? AND " +
        "   EVENT_TYPE=? AND " +
        "   EVENT_VALUE=? AND " +
        "   ADDITIONAL_INFO=?";

编辑:显然，它在我使用的 JDBC 版本 (3.0.18) 中不可用，但在最近的版本中添加 (3.0.21)。如果它不起作用，我会进一步更新。

Answer 1

刚刚确认 Snowflake 目前不支持在包含子查询的 INSERT 语句中提供绑定(bind)数组，但我们正在努力。