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https://issues.apache.org/jira/browse/TAJO-1340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14738294#comment-14738294
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ASF GitHub Bot commented on TAJO-1340:
--------------------------------------
Github user hyunsik commented on a diff in the pull request:
https://github.com/apache/tajo/pull/671#discussion_r39130216
--- Diff: tajo-client/src/main/java/org/apache/tajo/client/QueryClient.java
---
@@ -106,7 +107,7 @@
GetQueryResultResponse getResultResponse(QueryId queryId) throws
TajoException;
- TajoMemoryResultSet fetchNextQueryResult(final QueryId queryId, final
int fetchRowNum) throws TajoException;
+ Future<TajoMemoryResultSet> asyncFetchNextQueryResult(final QueryId
queryId, final int fetchRowNum);
--- End diff --
How about renaming it into ``fetchNextQueryResultAsync()``?
It would be more consistent for a method name, starting a verb. So, the
method's full meaning will be 'fetch the next query result asynchronously'.
> Change the default output file format.
> --------------------------------------
>
> Key: TAJO-1340
> URL: https://issues.apache.org/jira/browse/TAJO-1340
> Project: Tajo
> Issue Type: Improvement
> Components: Java Client, JDBC Driver, Offheap, Storage
> Reporter: Hyunsik Choi
> Assignee: Jinho Kim
> Fix For: 0.11.0, 0.12.0
>
> Attachments: TAJO-1340.patch, TAJO-1340_2.patch
>
>
> Currently, the default output file is CSV. Due to its nature, CSV has mainly
> three problems:
> * Its line or field delimiter can be duplicated to some character included
> in the result data.
> * Plan text file is likely to be larger than other file formats.
> * Its read and write performance is slow.
> We need to change the default output file format into other file formats. We
> also need to investigate which file format is the best for it.
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