[impala] 02/03: [docs] Add note about REFRESH for tables in custom catalog

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commit 240a9cddc2ae7cbcdbe3d1da569af7fb7e8c5859
Author: Zoltan Borok-Nagy <bo...@cloudera.com>
AuthorDate: Tue Aug 8 12:32:26 2023 +0200

    [docs] Add note about REFRESH for tables in custom catalog
    
    This patch adds a small note about Iceberg tables in custom catalog.
    
    Change-Id: I909603dff20fc4fefde48539d301844d40167a57
    Reviewed-on: http://gerrit.cloudera.org:8080/20328
    Tested-by: Impala Public Jenkins <im...@cloudera.com>
    Reviewed-by: Andrew Sherman <as...@cloudera.com>
---
 docs/topics/impala_iceberg.xml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/topics/impala_iceberg.xml b/docs/topics/impala_iceberg.xml
index 871b1ba56..1504efcdb 100644
--- a/docs/topics/impala_iceberg.xml
+++ b/docs/topics/impala_iceberg.xml
@@ -140,6 +140,8 @@ TBLPROPERTIES('iceberg.catalog'='hadoop.catalog',
           Alternatively, you can also use custom catalogs to use existing tables. It means you need to define
           your catalog in hive-site.xml.
           The advantage of this method is that other engines are more likely to be able to interact with this table.
+          Please note that the automatic metadata update will not work for these tables, you will have to manually
+          call REFRESH on the table when it changes outside Impala.
           To globally register different catalogs, set the following Hadoop configurations:
           <table rowsep="1" colsep="1" id="iceberg_custom_catalogs">
             <tgroup cols="2">