[jira] [Commented] (IMPALA-11710) Table properties are not updated in Iceberg metadata files

["Gabor Kaszab (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IMPALA-11710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17730952#comment-17730952 ] 

Gabor Kaszab commented on IMPALA-11710:
---------------------------------------

Ran into the same with a different table property. For the record let me add the repro steps:

 
create table tmp_ice (i int, s string) stored as iceberg tblproperties ('external.table.purge'='false');

alter table tmp_ice set tblproperties('external.table.purge'='true');
now if you call {{describe formatted tmp_ice;}} it's set to true as expected.
insert into tmp_ice values (1, "str1");
But if you for instance insert a row into a table it's set to false again. (checked in {{describe formatted}} and also {{{}show create table{}}})
 

> Table properties are not updated in Iceberg metadata files
> ----------------------------------------------------------
>
>                 Key: IMPALA-11710
>                 URL: https://issues.apache.org/jira/browse/IMPALA-11710
>             Project: IMPALA
>          Issue Type: Bug
>            Reporter: Noemi Pap-Takacs
>            Priority: Major
>              Labels: impala-iceberg
>
> This issue occurs in true external Hive Catalog tables.
> Iceberg stores the default file format in a table property called 'write.format.default'.  HMS also stores this value loaded from the Iceberg metadata json file.
> However, when this table property is altered through Impala, it is only changed in HMS, but does not update the Iceberg snapshot. When the table data is reloaded from Iceberg metadata, the old value will appear in HMS and the change is lost.
> This bug does not affect table properties that are not stored in Iceberg, because they will not be reloaded.



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