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https://issues.apache.org/jira/browse/IMPALA-13544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17904248#comment-17904248
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ASF subversion and git services commented on IMPALA-13544:
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Commit 79eb48e9f63a87bf240080949c11e90b47c1367f in impala's branch
refs/heads/master from Mihaly Szjatinya
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=79eb48e9f ]
IMPALA-13544: Expose TRANSLATED_TO_EXTERNAL property in SHOW CREATE
TABLE
Makes TRANSLATED_TO_EXTERNAL property from HMS exposed as a result of
SHOW CREATE TABLE request by removing it from ToSqlUtils' hidden
properties list.
Change-Id: I0048a041d50f5e520f5286a613a428393397bc4d
Reviewed-on: http://gerrit.cloudera.org:8080/22108
Reviewed-by: Impala Public Jenkins <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
> Expose TRANSLATED_TO_EXTERNAL property in SHOW CREATE TABLE
> -----------------------------------------------------------
>
> Key: IMPALA-13544
> URL: https://issues.apache.org/jira/browse/IMPALA-13544
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Reporter: Gabor Kaszab
> Assignee: Mihaly Szjatinya
> Priority: Major
> Labels: ramp-up
>
> When Impala creates a managed table (without the external keyword) HMS will
> in fact create it as an external table anyway. When doing this under the hood
> conversion HMS sets the TRANSLATED_TO_EXTERNAL table property to true so that
> it can later on see if the table was explicitly created as external or not.
> There is some logic that depends on the value of this field. For instance
> when renaming a table the folder of the could be also renamed based on how
> this table property is set.
> When we issue a SHOW CREATE TABLE in impala this property is not visible in
> the output, as a result the output is the same regardless of the table was
> created as external or was converted to by HMS under the hood. Hive on the
> other hand shows this property in the output of SHOW CREATE TABLE.
> My proposal is to add an improvement to Impala to show the
> TRANSLATED_TO_EXTERNAL property in the SHOW CREATE TABLE output. Otherwise,
> creating a table based on the SHOW CREATE TABLE output wouldn't be the same
> table, for instance when being renamed it could have a different behaviour
> when it comes to renaming the folder.
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