创建hive表后，可能会遇到需要增加字段的情况，我们可能会想当然的像mysql或其他数据库那样，直接添加一个字段。

但对于hive，直接添加的字段可能并不能使用，比如可能会在添加字段后，在插入数据时，会出现类似如下的错误：

Error: java.io.IOException: java.lang.ArrayIndexOutOfBoundsException: 9
        at org.apache.hadoop.hive.io.HiveIOExceptionHandlerChain.handleRecordReaderCreationException(HiveIOExceptionHandlerChain.java:97)
        at org.apache.hadoop.hive.io.HiveIOExceptionHandlerUtil.handleRecordReaderCreationException(HiveIOExceptionHandlerUtil.java:57)
        at org.apache.hadoop.hive.ql.io.HiveInputFormat.getRecordReader(HiveInputFormat.java:247)
        at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.<init>(MapTask.java:169)
        at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:429)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 9
        at org.apache.hadoop.hive.ql.io.orc.RecordReaderImpl$StructTreeReader.<init>(RecordReaderImpl.java:1864)
        at org.apache.hadoop.hive.ql.io.orc.RecordReaderImpl.createTreeReader(RecordReaderImpl.java:2263)
        at org.apache.hadoop.hive.ql.io.orc.RecordReaderImpl.access$000(RecordReaderImpl.java:77)
        at org.apache.hadoop.hive.ql.io.orc.RecordReaderImpl$StructTreeReader.<init>(RecordReaderImpl.java:1865)
        at org.apache.hadoop.hive.ql.io.orc.RecordReaderImpl.createTreeReader(RecordReaderImpl.java:2263)
        at org.apache.hadoop.hive.ql.io.orc.RecordReaderImpl.<init>(RecordReaderImpl.java:283)
        at org.apache.hadoop.hive.ql.io.orc.ReaderImpl.rowsOptions(ReaderImpl.java:492)
        at org.apache.hadoop.hive.ql.io.orc.OrcRawRecordMerger$ReaderPair.<init>(OrcRawRecordMerger.java:181)
        at org.apache.hadoop.hive.ql.io.orc.OrcRawRecordMerger.<init>(OrcRawRecordMerger.java:460)
        at org.apache.hadoop.hive.ql.io.orc.OrcInputFormat.getReader(OrcInputFormat.java:1109)
        at org.apache.hadoop.hive.ql.io.orc.OrcInputFormat.getRecordReader(OrcInputFormat.java:1007)
        at org.apache.hadoop.hive.ql.io.HiveInputFormat.getRecordReader(HiveInputFormat.java:245)
        ... 8 more

这种问题出现原因为hive中的表结构是不怎么支持字段添加的。

当然，出现这种情况时，你可能会使用replace语句来将表结构还原，不过，或许此时也不支持做还原操作了。若出现如下错误提示，就表明不能还原：

Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. Replace columns is not supported for table default.fac_scan. SerDe may be incompatible

这个为本人当前hive操作中遇到的坑，若有哪位大神有更好解决方案，希望能给予帮助，不胜感激。