[impala] 03/03: IMPALA-12010: [DOCS] Document the support for non-unique primary key

[st...@apache.org]

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commit 8edfab000e9ecd89cb3bed2b24e640489e88b342
Author: Shajini Thayasingh <st...@cloudera.com>
AuthorDate: Mon Mar 20 12:19:50 2023 -0700

    IMPALA-12010: [DOCS] Document the support for non-unique primary key
    
    Incorporated new comments.
    Made changes to address new comments posted after the patch was merged.
    
    Change-Id: Ifaea9645cf771b76fda3083d73b14524f53eb186
    Reviewed-on: http://gerrit.cloudera.org:8080/19636
    Tested-by: Impala Public Jenkins <im...@cloudera.com>
    Reviewed-by: Abhishek Chennaka <ac...@cloudera.com>
    Reviewed-by: Wenzhe Zhou <wz...@cloudera.com>
---
 docs/topics/impala_kudu.xml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/docs/topics/impala_kudu.xml b/docs/topics/impala_kudu.xml
index 0bc781b3b..8f9fbf194 100644
--- a/docs/topics/impala_kudu.xml
+++ b/docs/topics/impala_kudu.xml
@@ -210,7 +210,10 @@ under the License.
           table. The data engine handles this by appending a system generated auto-incrementing
           column to the non-unique primary key columns. This is done to guarantee the uniqueness of
           the primary key. This auto-incrementing column is named as 'auto_incrementing_id' with
-          bigint type. The assignment to it during insertion is automatic.</p>
+          bigint type and this column is only system generated and cannot be explicitly created by
+          the user. This auto_incrementing_id column is unique across a partition/tablet i.e. every
+          partition/tablet would have this column starting from one and incrementing monotonically.
+          The assignment to this column during insertion is automatic.</p>
       </conbody>
     </concept>
     <concept id="create">