Java JDBC预准备语句的最大参数标记 [英] Java JDBC prepared statement maximum parameter markers

问题描述

我使用 PreparedStatement 构建一个大型数据库调用，它有2000多个参数标记。

Im building a large database call using PreparedStatement that has 2000+ parameter markers.

我收到此错误

Caused by: java.sql.SQLException: Prepared or callable statement has more than 2000 parameter markers.
    at net.sourceforge.jtds.jdbc.SQLParser.parse(SQLParser.java:1139)
    at net.sourceforge.jtds.jdbc.SQLParser.parse(SQLParser.java:156)
    at net.sourceforge.jtds.jdbc.JtdsPreparedStatement.<init>(JtdsPreparedStatement.java:107)
Caused by: java.sql.SQLException: Prepared or callable statement has more than 2000 parameter markers. 

我尝试搜索API文档和谷歌但无法找到如何配置它。

I tried searching the API Docs and google but couldnt find how to configure this.

有谁知道是否有可能达到这个限制？我知道这将是一个缓慢的数据库调用，但现在这很好。

Does anyone know if it is possible to up this limit? I am aware it is going to be a slow database call but that is fine for now.

从长远来看，这也会给我带来任何问题，我最好分批运行吗？

Also will this cause me any issues in the long run, would I be better off running it in batches?

推荐答案

像你这样的接缝卡在2000.这是驱动源的一个切口。

Seams like you're stuck at 2000. Here is a cut out from the driver source.

if (params != null && params.size() > 255
     && connection.getPrepareSql() != TdsCore.UNPREPARED
     && procName != null) {
  int limit = 255; // SQL 6.5 and Sybase < 12.50
  if (connection.getServerType() == Driver.SYBASE) {
    if (connection.getDatabaseMajorVersion() > 12 ||
        connection.getDatabaseMajorVersion() == 12 &&
        connection.getDatabaseMinorVersion() >= 50) {
      limit = 2000; // Actually 2048 but allow some head room
    }
  } else {
    if (connection.getDatabaseMajorVersion() == 7) {
      limit = 1000; // Actually 1024
    } else if (connection.getDatabaseMajorVersion() > 7) {
      limit = 2000; // Actually 2100
    }
  }
  if (params.size() > limit) {
   throw new SQLException(
       Messages.get("error.parsesql.toomanyparams",
       Integer.toString(limit)),
       "22025");
  }
}

此处是一个博客，其中包含有关如何解决此问题的示例。

Here are a blog with examples on how to solve it.

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