執行一下陳述句，報一下錯誤。
hive> ALTER TABLE t_hive ADD COLUMNS (new_col String);
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. Unable to alter table. For direct MetaStore DB connections, we don't support retries at the client level.
不能插入一個新的欄位，原來的表結構
hive> desc t_hive;
OK
a int
b int
c int
uj5u.com熱心網友回復：
Log報錯資訊2017-05-19 14:53:41,036 ERROR [main]: ql.Driver (SessionState.java:printError(960)) - FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. Unable to alter table. For direct MetaStore DB connections, we don't support retries at the client level.
2017-05-19 14:53:41,036 INFO [main]: metadata.Hive (Hive.java:logDumpPhase(3294)) - Dumping metastore api call timing information for : execution phase
2017-05-19 14:53:41,037 INFO [main]: metadata.Hive (Hive.java:dumpAndClearMetaCallTiming(3285)) - Total time spent in this metastore function was greater than 1000ms : getTable_(String, String, )=2108
2017-05-19 14:53:41,037 INFO [main]: log.PerfLogger (PerfLogger.java:PerfLogEnd(148)) - </PERFLOG method=Driver.execute start=1495176797529 end=1495176821037 duration=23508 from=org.apache.hadoop.hive.ql.Driver>
2017-05-19 14:53:41,037 INFO [main]: log.PerfLogger (PerfLogger.java:PerfLogBegin(121)) - <PERFLOG method=releaseLocks from=org.apache.hadoop.hive.ql.Driver>
2017-05-19 14:53:41,037 INFO [main]: log.PerfLogger (PerfLogger.java:PerfLogEnd(148)) - </PERFLOG method=releaseLocks start=1495176821037 end=1495176821037 duration=0 from=org.apache.hadoop.hive.ql.Driver>
2017-05-19 14:53:41,037 INFO [main]: log.PerfLogger (PerfLogger.java:PerfLogBegin(121)) - <PERFLOG method=releaseLocks from=org.apache.hadoop.hive.ql.Driver>
2017-05-19 14:53:41,037 INFO [main]: log.PerfLogger (PerfLogger.java:PerfLogEnd(148)) - </PERFLOG method=releaseLocks start=1495176821037 end=1495176821037 duration=0 from=org.apache.hadoop.hive.ql.Driver>
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