被＆＃34; [Microsoft] [ODBC驱动程序管理器]无效的游标状态＆＃34;

Question

我已经看过SO上的每一个例子（也看过其他地方），我对这个问题感到难过。

tblNodes是用于存储JTree的MS Access dbase表...在读入时我尝试查找存在多个具有相同父ID和相同父记录的异常情况的所有情况兄弟姐妹指数。

这是我的SSCCE，虽然没有dbase本身显然没那么有用。但是我认为任何有这方面知识的人都会发现输出很令人头疼。

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class CursorProb {

    public static void main(String[] args) throws SQLException {
        // normalise where we find any duplicate sib_index+parent ID pairings...

        // this more complex SQL statement lists the parent nodes involved
//        String dup_sib_indices_sql = "SELECT Parent FROM ( SELECT Parent, SiblingIndex, Count(*) " +
//                "FROM tblNodes GROUP BY Parent, SiblingIndex HAVING Count(*)>1 ) AS ParentsToNormalise GROUP BY Parent";

        // but, bafflingly, even this simpler one produces the "Invalid cursor state" error 
        String dup_sib_indices_sql = 
                "SELECT tblNodes.Parent, tblNodes.SiblingIndex FROM tblNodes GROUP BY tblNodes.Parent, tblNodes.SiblingIndex";

        String data_source =  "jdbc:odbc:Copy of kernel3_1 DATA $USER";
        Connection dbase_conn = DriverManager.getConnection( data_source, "", "");
        PreparedStatement ps_dup_sib_indices = dbase_conn.prepareStatement( dup_sib_indices_sql, 
                java.sql.ResultSet.TYPE_SCROLL_SENSITIVE,  java.sql.ResultSet.CONCUR_READ_ONLY );
// NB various combos tried here:       
//              java.sql.ResultSet.TYPE_SCROLL_INSENSITIVE,  java.sql.ResultSet.CONCUR_UPDATABLE ); ... etc.

        ResultSet rs = ps_dup_sib_indices.executeQuery();

        // rs.beforeFirst(); <-- makes no difference
        int i = 0;
        while ( rs.next() ){
            int parent_id = rs.getInt( "Parent" );
            System.out.println( "=== parent_id " + parent_id + ", i " + i );
            i++;
        }
        System.out.println( "=== Never get to here..." );
    }
}

这是输出：

=== parent_id 0, i 0
=== parent_id 1, i 1
...
=== parent_id 2765, i 491
=== parent_id 2768, i 492
Exception in thread "main" java.sql.SQLException: [Microsoft][ODBC Driver Manager] Invalid cursor state
    at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6964)
    at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7121)
    at sun.jdbc.odbc.JdbcOdbc.SQLGetDataInteger(JdbcOdbc.java:3818)
    at sun.jdbc.odbc.JdbcOdbcResultSet.getDataInteger(JdbcOdbcResultSet.java:5637)
    at sun.jdbc.odbc.JdbcOdbcResultSet.getInt(JdbcOdbcResultSet.java:582)
    at sun.jdbc.odbc.JdbcOdbcResultSet.getInt(JdbcOdbcResultSet.java:600)
    at root.CursorProb.main(CursorProb.java:34)

在MS Access dbase中运行SQL作为查询本身不会产生任何问题（并在错误之前生成相同的输出：493行）。

即。 ＆＃34; SELECT tblNodes.Parent，tblNodes.SiblingIndex FROM tblNodes GROUP BY tblNodes.Parent，tblNodes.SiblingIndex;＆＃34;