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Amir Shenavandeh commented on HIVE-13976: ----------------------------------------- This seems to be fixed in HIVE-2 and above. > UNION ALL which takes actual source table in one side failed > ------------------------------------------------------------ > > Key: HIVE-13976 > URL: https://issues.apache.org/jira/browse/HIVE-13976 > Project: Hive > Issue Type: Bug > Affects Versions: 0.13.0 > Environment: Ubuntu 12.04, JDK 7 > Reporter: Kai Sasaki > > UNION ALL must take actual source table in both side or none exclusively. > * UNION ALL with actual table in both side -> Succeed as expected > {code} > SELECT > 1 AS id, > 'Alice' AS name > FROM > table1 > UNION ALL > SELECT > 2 AS id, > 'Bob' AS name > FROM > table2 > {code} > * UNION ALL without actual table in both side -> Succeed as expected > {code} > SELECT > 1 AS id, > 'Alice' AS name > UNION ALL > SELECT > 2 AS id, > 'Bob' AS name > {code} > * UNION ALL with actual table on one side -> Failed > {code} > SELECT > 1 AS id, > 'Alice' AS name > UNION ALL > SELECT > 2 AS id, > 'Bob' AS name > FROM > some_table > {code} > The error message from map task of third case is this. > {code} > Diagnostic Messages for this Task: > Error: java.lang.IllegalArgumentException: Can not create a Path from an > empty string > at org.apache.hadoop.fs.Path.checkPathArg(Path.java:127) > at org.apache.hadoop.fs.Path.<init>(Path.java:135) > at > org.apache.hadoop.hive.ql.io.HiveInputFormat$HiveInputSplit.getPath(HiveInputFormat.java:116) > at org.apache.hadoop.mapred.MapTask.updateJobWithSplit(MapTask.java:458) > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)