我在hive中有表，我必须更新某些记录。我正在使用hive 0.13版本。我做了一些谷歌搜索，发现我可以使用带有插入覆盖的If-Else语句来执行此操作，但在运行查询后，它会抛出空指针异常。
这是我的员工表：
1 emp1
2 emp2
3 emp3
4 emp4
5 emp5
我创建了另一个表employee_incr，其架构与employee相同，并运行此查询以获取更新的记录。
insert overwrite table employee_incr select employee.ename,if(employee.id="1",12,employee.id ) as employee.id from employee;
这是来自Hive的痕迹。
Concurrency mode is disabled, not creating a lock manager
2015-07-27 16:26:42,086 INFO [main]: log.PerfLogger (PerfLogger.java:PerfLogBegin(108)) - <PERFLOG method=compile from=org.apache.hadoop.hive.ql.Driver>
2015-07-27 16:26:42,111 INFO [main]: log.PerfLogger (PerfLogger.java:PerfLogBegin(108)) - <PERFLOG method=parse from=org.apache.hadoop.hive.ql.Driver>
2015-07-27 16:26:42,115 INFO [main]: parse.ParseDriver (ParseDriver.java:parse(185)) - Parsing command: insert overwrite table employee_incr select employee.ename,if(employee.id="1",12,employee.id ) as employee.id from employee
2015-07-27 16:26:42,332 ERROR [main]: ql.Driver (SessionState.java:printError(547)) - FAILED: NullPointerException null
java.lang.NullPointerException
at org.apache.hadoop.hive.ql.parse.HiveParser.regularBody(HiveParser.java:37646)
at org.apache.hadoop.hive.ql.parse.HiveParser.queryStatementExpressionBody(HiveParser.java:36884)
at org.apache.hadoop.hive.ql.parse.HiveParser.queryStatementExpression(HiveParser.java:36760)
at org.apache.hadoop.hive.ql.parse.HiveParser.execStatement(HiveParser.java:1338)
at org.apache.hadoop.hive.ql.parse.HiveParser.statement(HiveParser.java:1036)
at org.apache.hadoop.hive.ql.parse.ParseDriver.parse(ParseDriver.java:199)
at org.apache.hadoop.hive.ql.parse.ParseDriver.parse(ParseDriver.java:166)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:409)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:323)
at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:980)
at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1045)
at org.apache.hadoop.hive.ql.Driver.run(Driver.java:916)
at org.apache.hadoop.hive.ql.Driver.run(Driver.java:906)
at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:268)
at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:220)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:423)
at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:793)
at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:686)
at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:625)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
2015-07-27 16:26:42,333 INFO [main]: log.PerfLogger (PerfLogger.java:PerfLogEnd(135)) - </PERFLOG method=compile start=1437994602086 end=1437994602333 duration=247 from=org.apache.hadoop.hive.ql.Driver>
2015-07-27 16:26:42,333 INFO [main]: log.PerfLogger (PerfLogger.java:PerfLogBegin(108)) - <PERFLOG method=releaseLocks from=org.apache.hadoop.hive.ql.Driver>
2015-07-27 16:26:42,333 INFO [main]: log.PerfLogger (PerfLogger.java:PerfLogEnd(135)) - </PERFLOG method=releaseLocks start=1437994602333 end=1437994602333 duration=0 from=org.apache.hadoop.hive.ql.Driver>
2015-07-27 16:26:42,337 INFO [main]: log.PerfLogger (PerfLogger.java:PerfLogBegin(108)) - <PERFLOG method=releaseLocks from=org.apache.hadoop.hive.ql.Driver>
2015-07-27 16:26:42,337 INFO [main]: log.PerfLogger (PerfLogger.java:PerfLogEnd(135)) - </PERFLOG method=releaseLocks start=1437994602337 end=1437994602337 duration=0 from=org.apache.hadoop.hive.ql.Driver>
任何帮助？