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IMPALA-14003: Update docs about query rewrites for MERGE statements

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This change updates the documentation of limitations for MERGE
statements for Iceberg tables.

Change-Id: Ic177c9051974715a3a07cadf067a4057326baae2
Reviewed-on: http://gerrit.cloudera.org:8080/22825
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Reviewed-by: Daniel Becker <daniel.becker@cloudera.com>
This commit is contained in:
Peter Rozsa
2025-04-28 09:43:21 +02:00
committed by Noemi Pap-Takacs
parent 3c24706c72
commit c33c980fb6
1 changed files with 1 additions and 5 deletions
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6
docs/topics/impala_iceberg.xml
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@@ -576,11 +576,7 @@ MERGE INTO ice_t USING source ON ice_t.a = source.id
</codeblock>
</p>
<p>
The limitations of the <codeph>UPDATE</codeph> statement also apply to the <codeph>MERGE</codeph> statement; in addition,
the limitations of the <codeph>MERGE</codeph> statement:
<ul>
<li>Subqueries in source statements must be simple queries as internal rewrite is not supported.</li>
</ul>
The limitations of the <codeph>UPDATE</codeph> statement also apply to the <codeph>MERGE</codeph> statement.
</p>
<p>
More information about the <codeph>MERGE</codeph> statement can be found at <xref href="impala_merge.xml"/>.