Hi Jae Lee, TAJO-304 (https://issues.apache.org/jira/browse/TAJO-304) was resolved. Now, 'DROP TABLE' does not remove data, and just remove a table information from catalog. And, 'DROP TABLE table_name PURGE' removes a table information as well as removes data.
- hyunsik On Wed, Nov 13, 2013 at 11:02 PM, Jae Lee <[email protected]> wrote: > Hi Hyunsik Choi, > > Thank you for your reply and jira issues. > I loot forward to meet 0.8-incubating. > > Regards, > Jae. > > > > 2013/11/13 Hyunsik Choi <[email protected]> > >> Hi Jae Lee, >> >> Thank you for your interest in Tajo. From your questions, I've just >> added two jira issues, and scheduled them to 0.8-incubating. They will >> be resolved soon. >> >> TAJO-304: drop table command should not remove data files in default >> (https://issues.apache.org/jira/browse/TAJO-304) >> TAJO-305: Implement killQuery feature >> (https://issues.apache.org/jira/browse/TAJO-305) >> >> - hyunsik >> >> On Tue, Nov 12, 2013 at 10:58 AM, Jinho Kim <[email protected]> wrote: >> > Hi Jae, >> > >> > Could you try to do the following? I'm suspecting that some column values >> > may contain Hive's default null character '\\N'. >> > >> > CREATE EXTERNAL TABLE tablename( A int, B text, C text) >> > >> > using csv with('csvfile.delimiter'='\001','csvfile.null'='\\N') >> > >> > >> > Besides, in Hive, some value that cannot be parsed are dealt as NULL. >> But, >> > in the current Tajo, they causes errors. >> > >> > >> > Thanks >> > -Jinho >> > >> > >> > 2013/11/12 Jae Lee <[email protected]> >> > >> >> Hi Jihoon, >> >> >> >> Thank you for your answer. >> >> About Q1 has more question. >> >> I already waiting for query result long time. I think that is not >> normaly. >> >> COUNT(*) query got result only 300sec, but DISTINCT, GROUPBY and SUM >> query >> >> is excuting whole day. >> >> I found another error message. Please see below message. >> >> Error message is about integer type column name of "Year". >> >> The query was "select distinct year from departuredelay;" >> >> I was execute same query on Hive. It had no error. >> >> But Year column has some null or blank data. >> >> Table was create EXTERNAL table with several CSV files on HDFS. >> >> >> --------------------------------------------------------------------------- >> >> >> >> 2013-11-11 18:34:01,436 ERROR worker.Task (Task.java:run(363)) - >> >> java.lang.NumberFormatException: For input string: "Year" >> >> at >> >> >> >> >> java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) >> >> at java.lang.Integer.parseInt(Integer.java:492) >> >> at java.lang.Integer.valueOf(Integer.java:582) >> >> at org.apache.tajo.datum.DatumFactory.createInt4(DatumFactory.java:140) >> >> at >> org.apache.tajo.storage.LazyTuple.createByTextBytes(LazyTuple.java:313) >> >> at org.apache.tajo.storage.LazyTuple.get(LazyTuple.java:126) >> >> at org.apache.tajo.engine.eval.FieldEval.eval(FieldEval.java:58) >> >> at org.apache.tajo.engine.planner.Projector.eval(Projector.java:87) >> >> at >> >> >> >> >> org.apache.tajo.engine.planner.physical.SeqScanExec.next(SeqScanExec.java:111) >> >> at >> >> >> >> >> org.apache.tajo.engine.planner.physical.HashAggregateExec.compute(HashAggregateExec.java:57) >> >> at >> >> >> >> >> org.apache.tajo.engine.planner.physical.HashAggregateExec.next(HashAggregateExec.java:83) >> >> at >> >> >> >> >> org.apache.tajo.engine.planner.physical.PartitionedStoreExec.next(PartitionedStoreExec.java:121) >> >> at org.apache.tajo.worker.Task.run(Task.java:355) >> >> at org.apache.tajo.worker.TaskRunner$1.run(TaskRunner.java:376) >> >> at java.lang.Thread.run(Thread.java:744) >> >> >> >> >> >> >> ----------------------------------------------------------------------------- >> >> >> >> >> >> >> >> Also I attach file tajo-site.xml. >> >> Please check my config is correct. >> >> >> >> hostname | hadoop | tajo | DBMS >> >> namenode | namenode | master | Maria (Metastore) >> >> snamenode | snamenode+datanode1 | worker >> >> datanode02 | datanode2 | worker >> >> datanode03 | datanode3 | worker >> >> >> >> >> >> >> ----------------------------------------------------------------------------- >> >> <configuration> >> >> <property> >> >> <name>tajo.rootdir</name> >> >> <value>hdfs://namenode:9000/tajo</value> >> >> </property> >> >> <property> >> >> <name>tajo.master.umbilical-rpc.address</name> >> >> <value>namenode:26001</value> >> >> </property> >> >> <property> >> >> <name>tajo.master.client-rpc.address</name> >> >> <value>namenode:26002</value> >> >> </property> >> >> <property> >> >> <name>tajo.master.info-http.address</name> >> >> <value>namenode:26080</value> >> >> </property> >> >> <property> >> >> <name>tajo.catalog.client-rpc.address</name> >> >> <value>namenode:26005</value> >> >> </property> >> >> </configuration> >> >> >> >> >> >> Regards, >> >> Jae >> >> >> >> >> >> 2013/11/11 Jihoon Son <[email protected]> >> >> >> >> > Hi Jae Lee, >> >> > thanks for your interesting to Tajo. >> >> > >> >> > Here are my answers. >> >> > >> >> > 1. The timeout message looks like an error, but it does not mean that >> the >> >> > query is failed. (We should change the message.) >> >> > Would you wait for some time after executing a query, please? >> >> > If any other errors occur, please report it to us. >> >> > >> >> > 2. Tajo's SQL commands are designed to follow those of traditional >> >> > relational databases. >> >> > In those systems, the 'DROP table' command deletes data from disks. >> >> > However, we are also considering the Hive-style 'DROP table', because >> >> > tables are generally very large. >> >> > >> >> > 3. Tajo currently does not provide any commands to kill executing >> >> queries. >> >> > Instead, you should kill the master and every worker using the unix >> >> 'kill' >> >> > command. >> >> > >> >> > If you have any other questions, >> >> > please feel free to ask us. >> >> > >> >> > Thanks, >> >> > Jihoon >> >> > >> >> > >> >> > 2013/11/11 Jae Lee <[email protected]> >> >> > >> >> > > Hello, >> >> > > >> >> > > :: I have error message and hang query with below. >> >> > > It's from clustered tajo worker. >> >> > > Centos 6.2 + hadoop 2.0.5 + tajo 0.2.0 >> >> > > Just count(*) query is working but use distinct or group by query >> had >> >> > hang >> >> > > and this error messages >> >> > > >> >> > > :: have more question >> >> > > Tajo delete files on hdfs when i drop EXTERNAL table. is it normal? >> >> > > Because Hive is not delete files when drop external table. >> >> > > >> >> > > :: How to can i kill tajo jobs (query)? >> >> > > >> >> > > >> --------------------------------------------------------------------- >> >> > > 2013-11-11 18:44:22,751 WARN worker.TaskRunner >> >> > (TaskRunner.java:run(339)) >> >> > > - Timeout >> >> > > >> >> > > >> >> > >> >> >> GetTask:eb_1384155011466_0005_000001,container_1384155011466_0005_01_000013, >> >> > > but retry >> >> > > java.util.concurrent.TimeoutException >> >> > > at org.apache.tajo.rpc.CallFuture.get(CallFuture.java:81) >> >> > > at org.apache.tajo.worker.TaskRunner$1.run(TaskRunner.java:328) >> >> > > at java.lang.Thread.run(Thread.java:744) >> >> > > >> >> > > >> >> > > Regards, >> >> > > Jae >> >> > > >> >> > >> >> > >> >> > >> >> > -- >> >> > Jihoon Son >> >> > >> >> > Database & Information Systems Group, >> >> > Prof. Yon Dohn Chung Lab. >> >> > Dept. of Computer Science & Engineering, >> >> > Korea University >> >> > 1, 5-ga, Anam-dong, Seongbuk-gu, >> >> > Seoul, 136-713, Republic of Korea >> >> > >> >> > Tel : +82-2-3290-3580 >> >> > E-mail : [email protected] >> >> > >> >> >>
