Description
hive> describe tab2; Query ID = jdere_20140312185454_e3ed213e-8b3a-4963-b815-19965edad587 OK c1 timestamp None Time taken: 0.155 seconds, Fetched: 1 row(s) hive> select * from tab2; Query ID = jdere_20140312185454_8a009070-df79-45de-8642-e85668a378d7 OK NULL NULL NULL NULL NULL Time taken: 0.067 seconds, Fetched: 5 row(s) hive> select to_unix_timestamp(c1) from tab2; hive> select to_date(c1) from tab2;
Fails with errors like:
java.lang.Exception: java.lang.RuntimeException: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing row {"c1":null} at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:401) Caused by: java.lang.RuntimeException: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing row {"c1":null} at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.map(ExecMapper.java:195) at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54) at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:429) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341) at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:233) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) at java.lang.Thread.run(Thread.java:680) Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing row {"c1":null} at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:534) at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.map(ExecMapper.java:177) ... 10 more Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Error evaluating to_date(c1) at org.apache.hadoop.hive.ql.exec.SelectOperator.processOp(SelectOperator.java:84) at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:790) at org.apache.hadoop.hive.ql.exec.TableScanOperator.processOp(TableScanOperator.java:92) at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:790) at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:524) ... 11 more Caused by: java.lang.NullPointerException at org.apache.hadoop.hive.ql.udf.generic.GenericUDFDate.evaluate(GenericUDFDate.java:106) at org.apache.hadoop.hive.ql.exec.ExprNodeGenericFuncEvaluator._evaluate(ExprNodeGenericFuncEvaluator.java:166) at org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator.evaluate(ExprNodeEvaluator.java:77) at org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator.evaluate(ExprNodeEvaluator.java:65) at org.apache.hadoop.hive.ql.exec.SelectOperator.processOp(SelectOperator.java:79) ... 15 more
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