java - 使用准备好的语句迭代 sql 结果集时出现 ArrayIndexOutOfBoundsException

Question

我在获取结果集时收到以下错误。我正在使用 jdbc 瘦驱动程序(ojdbc6)。有趣的是，它在处理10行后给出了错误。我查了一些论坛，发现jdbc驱动有问题。我想知道我是否可以用这个驱动程序(ojdbc6)本身做点什么!!

非常感谢对此的任何帮助。

表结构如下:

CREATE TABLE "TEST_SO_MANY_COLUMNS" 
   (    "COL1" VARCHAR2(4000 BYTE), 
    "COL2" VARCHAR2(4000), 
    "COL3" VARCHAR2(4000), 
    "COL4" VARCHAR2(4000), 
    "COL5" VARCHAR2(4000), 
    "COL6" VARCHAR2(4000), 
    "COL7" VARCHAR2(4000), 
    "COL8" VARCHAR2(4000), 
    "COL9" VARCHAR2(4000), 
    "COL10" VARCHAR2(4000), 
    "COL11" VARCHAR2(4000), 
    "COL12" VARCHAR2(4000), 
    "COL13" VARCHAR2(4000), 
    "COL14" VARCHAR2(4000), 
    "COL15" VARCHAR2(4000), 
    "COL16" VARCHAR2(4000), 
    "COL17" VARCHAR2(4000), 
    "COL18" VARCHAR2(4000), 
    "COL19" VARCHAR2(4000), 
    "COL20" VARCHAR2(4000), 
    "COL21" VARCHAR2(4000), 
    "COL22" VARCHAR2(4000), 
    "COL23" VARCHAR2(4000), 
    "COL24" VARCHAR2(4000), 
    "COL25" VARCHAR2(4000), 
    "COL26" VARCHAR2(4000), 
    "COL27" VARCHAR2(4000), 
    "COL28" VARCHAR2(4000), 
    "COL29" VARCHAR2(4000), 
    "COL30" VARCHAR2(4000), 
    "COL31" VARCHAR2(4000), 
    "COL32" VARCHAR2(4000), 
    "COL33" VARCHAR2(4000), 
    "COL34" VARCHAR2(4000), 
    "COL35" VARCHAR2(4000), 
    "COL36" VARCHAR2(4000), 
    "COL37" VARCHAR2(4000), 
    "COL38" VARCHAR2(4000), 
    "COL39" VARCHAR2(4000), 
    "COL40" VARCHAR2(4000), 
    "COL41" VARCHAR2(4000), 
    "COL42" VARCHAR2(4000), 
    "COL43" VARCHAR2(4000), 
    "COL44" VARCHAR2(4000), 
    "COL45" VARCHAR2(4000), 
    "COL46" VARCHAR2(4000), 
    "COL47" VARCHAR2(4000), 
    "COL48" VARCHAR2(4000), 
    "COL49" VARCHAR2(4000), 
    "COL50" VARCHAR2(4000), 
    "COL51" VARCHAR2(4000), 
    "COL52" VARCHAR2(4000), 
    "COL53" VARCHAR2(4000), 
    "COL54" VARCHAR2(4000), 
    "COL55" VARCHAR2(4000), 
    "COL56" VARCHAR2(4000), 
    "COL57" VARCHAR2(4000), 
    "COL58" VARCHAR2(4000), 
    "COL59" VARCHAR2(4000), 
    "COL60" VARCHAR2(4000), 
    "COL61" VARCHAR2(4000), 
    "COL62" VARCHAR2(4000), 
    "COL63" VARCHAR2(4000), 
    "COL64" VARCHAR2(4000), 
    "COL65" VARCHAR2(4000), 
    "COL66" VARCHAR2(4000), 
    "COL67" VARCHAR2(4000), 
    "COL68" VARCHAR2(4000), 
    "COL69" VARCHAR2(4000), 
    "COL70" VARCHAR2(4000), 
    "COL71" VARCHAR2(4000), 
    "COL72" VARCHAR2(4000), 
    "COL73" VARCHAR2(4000), 
    "COL74" VARCHAR2(4000), 
    "COL75" VARCHAR2(4000), 
    "COL76" VARCHAR2(4000), 
    "COL77" VARCHAR2(4000), 
    "COL78" VARCHAR2(4000), 
    "COL79" VARCHAR2(4000), 
    "COL80" VARCHAR2(4000), 
    "COL81" VARCHAR2(4000), 
    "COL82" VARCHAR2(4000), 
    "COL83" VARCHAR2(4000), 
    "COL84" VARCHAR2(4000), 
    "COL85" VARCHAR2(4000), 
    "COL86" VARCHAR2(4000), 
    "COL87" VARCHAR2(4000), 
    "COL88" VARCHAR2(4000), 
    "COL89" VARCHAR2(4000), 
    "COL90" VARCHAR2(4000), 
    "COL91" VARCHAR2(4000), 
    "COL92" VARCHAR2(4000), 
    "COL93" VARCHAR2(4000), 
    "COL94" VARCHAR2(4000), 
    "COL95" VARCHAR2(4000), 
    "COL96" VARCHAR2(4000), 
    "COL97" VARCHAR2(4000), 
    "COL98" VARCHAR2(4000), 
    "COL99" VARCHAR2(4000), 
    "COL100" VARCHAR2(4000), 
    "COL101" VARCHAR2(4000), 
    "COL102" VARCHAR2(4000), 
    "COL103" VARCHAR2(4000), 
    "COL104" VARCHAR2(4000), 
    "COL105" VARCHAR2(4000), 
    "COL106" VARCHAR2(4000), 
    "COL107" VARCHAR2(4000), 
    "COL108" VARCHAR2(4000), 
    "COL109" VARCHAR2(4000), 
    "COL110" VARCHAR2(4000), 
    "COL111" VARCHAR2(4000), 
    "COL112" VARCHAR2(4000), 
    "COL113" VARCHAR2(4000), 
    "COL114" VARCHAR2(4000), 
    "COL115" VARCHAR2(4000), 
    "COL116" VARCHAR2(4000), 
    "COL117" VARCHAR2(4000), 
    "COL118" VARCHAR2(4000), 
    "COL119" VARCHAR2(4000), 
    "COL120" VARCHAR2(4000)
   );

表格大约有 200 行，所有列的值最多为 4000 个字符。

查询格式:

select "COL1","COL2","COL3" ......."COL120" from SRC."TEST_SO_MANY_COLUMNS"

代码片段:

 Statement sel_stmt = connection.createStatement();
 ResultSet res = sel_stmt.executeQuery(query);
 res.setFetchSize(10000);
 ResultSetMetaData resultSetMetaData = resultSet.getMetaData();

获取结果集时未收到任何错误。迭代结果集时出现问题:

int count = 0;
if (resultSet.next()) {
    count++ ;
    //Do Something i.e. resultSet.getObject() .. and so on.. 
}
// Do something 

上面的迭代对于前 10 行工作正常，但之后出现以下异常。错误的堆栈跟踪:

java.lang.ArrayIndexOutOfBoundsException
    at java.lang.System.arraycopy(Native Method)
    at oracle.jdbc.driver.T4CVarcharAccessor.saveDataFromOldDefineBuffers(T4CVarcharAccessor.java:411)
    at oracle.jdbc.driver.T4CStatement.saveDefineBuffersIfRequired(T4CStatement.java:533)
    at oracle.jdbc.driver.OracleStatement.prepareAccessors(OracleStatement.java:1070)
    at oracle.jdbc.driver.OracleStatement.check_row_prefetch_changed(OracleStatement.java:3080)
    at oracle.jdbc.driver.OracleResultSetImpl.close_or_fetch_from_next(OracleResultSetImpl.java:321)
    at oracle.jdbc.driver.OracleResultSetImpl.next(OracleResultSetImpl.java:277)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Answer 1

这是一个相当老的错误(4751145)。据报道，2005年出现在10.2驱动程序中。 10.2.0.3 驱动程序已修复。我的猜测是您正在运行 10.2.0.1 或 10.2.0.2。

Oracle 下载页面在这里: http://www.oracle.com/technetwork/database/features/jdbc/index-091264.html

如果您想坚持使用 10.2 代码线，那么您应该移动到最新的补丁集 10.2.0.5。请注意，该驱动程序向后兼容，因此您还可以使用 11.2 甚至 12.1 驱动程序连接到 10g 数据库。