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IMPALA-14500: Clarify usage of SYSTEM_VERSION

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Clarifies that SYSTEM_VERSION in Iceberg queries refers to a snapshot
id.

Change-Id: I64c4dc9ce82af320602f8de7c435242aa2f90d77
Reviewed-on: http://gerrit.cloudera.org:8080/23543
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Reviewed-by: Quanlong Huang <huangquanlong@gmail.com>
This commit is contained in:
Michael Smith
2025-10-14 10:39:17 -07:00
committed by Quanlong Huang
parent 7e34cabed7
commit 1a74ee03f3
1 changed files with 2 additions and 2 deletions
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docs/topics/impala_iceberg.xml
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@@ -698,8 +698,8 @@ OPTIMIZE TABLE [<varname>db_name</varname>.]<varname>table_name</varname> [FILE_
</p>
<p>
We can use the <codeph>FOR SYSTEM_TIME AS OF</codeph> and <codeph>FOR SYSTEM_VERSION AS OF</codeph>
clauses in <codeph>SELECT</codeph> queries, e.g.:
We can use the clauses <codeph>FOR SYSTEM_TIME AS OF</codeph> with a timestamp and
<codeph>FOR SYSTEM_VERSION AS OF</codeph> with a snapshot id in <codeph>SELECT</codeph> queries, e.g.:
<codeblock>
SELECT * FROM ice_t FOR SYSTEM_TIME AS OF '2022-01-04 10:00:00';
SELECT * FROM ice_t FOR SYSTEM_TIME AS OF now() - interval 5 days;