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doc: remove useless MERGE example

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Reported-by: dwayne.towell@gmail.com

Discussion: https://postgr.es/m/167699245721.1902146.6479762301617101634@wrigleys.postgresql.org

Backpatch-through: master
This commit is contained in:
Bruce Momjian 2024-11-01 16:20:27 -04:00
parent e1a76db1a8
commit 4a9effe45e
1 changed files with 0 additions and 17 deletions
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doc/src/sgml/ref/merge.sgml
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@ -707,23 +707,6 @@ WHEN NOT MATCHED THEN
</programlisting> </programlisting>
</para> </para>
<para>
Notice that this would be exactly equivalent to the following
statement because the <literal>MATCHED</literal> result does not change
during execution.
<programlisting>
MERGE INTO customer_account ca
USING (SELECT customer_id, transaction_value FROM recent_transactions) AS t
ON t.customer_id = ca.customer_id
WHEN MATCHED THEN
UPDATE SET balance = balance + transaction_value
WHEN NOT MATCHED THEN
INSERT (customer_id, balance)
VALUES (t.customer_id, t.transaction_value);
</programlisting>
</para>
<para> <para>
Attempt to insert a new stock item along with the quantity of stock. If Attempt to insert a new stock item along with the quantity of stock. If
the item already exists, instead update the stock count of the existing the item already exists, instead update the stock count of the existing