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https://issues.apache.org/jira/browse/TAJO-1644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14600127#comment-14600127
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ASF GitHub Bot commented on TAJO-1644:
--------------------------------------
Github user hyunsik commented on a diff in the pull request:
https://github.com/apache/tajo/pull/601#discussion_r33194715
--- Diff: tajo-common/src/main/java/org/apache/tajo/conf/TajoConf.java ---
@@ -376,7 +375,11 @@ public static int setDateOrder(int dateOrder) {
// Behavior Control
---------------------------------------------------------
$BEHAVIOR_ARITHMETIC_ABORT("tajo.behavior.arithmetic-abort", false),
- // ResultSet ---------------------------------------------------------
+ // If True, a partitioned table is overwritten even if a sub query
leads to no result.
+ // Otherwise, the table data will be kept if there is no result
+
$TABLE_PARTITION_NO_RESULT_OVERWRITE_ENABLED("tajo.partition.overwrite.even-if-no-result",
false),
--- End diff --
I have one more suggestion. It would be great if you use PARTITION instead
of TABLE_PARTITION. It is still clear because we only use the term 'partition'
to indicate table partition.
> When inserting empty data into a partitioned table, existing data would be
> removed.
> -----------------------------------------------------------------------------------
>
> Key: TAJO-1644
> URL: https://issues.apache.org/jira/browse/TAJO-1644
> Project: Tajo
> Issue Type: Bug
> Components: query master
> Reporter: Jaehwa Jung
> Assignee: Jaehwa Jung
> Fix For: 0.11.0, 0.10.2
>
> Attachments: TAJO-1644.patch, TAJO-1644_2.patch
>
>
> When inserting empty data into a partitioned table, existing data would be
> removed. Tajo provides column value partition which is hive-style partition.
> In hive, when inserting empty data into a partition, there are two cases. If
> you use dynamic partitions, existing data never would be removed. But if you
> don't use dynamic partitions, existing data would be removed. When inserting
> a data to partition, tajo user don't specify each column and each column
> value. So, it is similar to dynamic partition of hive. It seems to update
> deletion logic of partitioned table.
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