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https://issues.apache.org/jira/browse/SPARK-38200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17495322#comment-17495322
]
melin edited comment on SPARK-38200 at 2/21/22, 5:17 AM:
---------------------------------------------------------
[~beliefer]
oracle:
[https://docs.oracle.com/en/database/other-databases/nosql-database/21.1/sqlfornosql/adding-table-rows-using-insert-and-upsert-statements.html]
db2 or sqlserver
{code:java}
MERGE INTO mytable AS mt USING (
SELECT * FROM TABLE (
VALUES
(123, 'text')
)
) AS vt(id, val) ON (mt.id = vt.id)
WHEN MATCHED THEN
UPDATE SET val = vt.val
WHEN NOT MATCHED THEN
INSERT (id, val) VALUES (vt.id, vt.val)
; {code}
was (Author: melin):
[~beliefer]
oracle:
[https://docs.oracle.com/en/database/other-databases/nosql-database/21.1/sqlfornosql/adding-table-rows-using-insert-and-upsert-statements.html]
> [SQL] Spark JDBC Savemode Supports replace
> ------------------------------------------
>
> Key: SPARK-38200
> URL: https://issues.apache.org/jira/browse/SPARK-38200
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.3.0
> Reporter: melin
> Priority: Major
>
> When writing data into a relational database, data duplication needs to be
> considered. Both mysql and postgres support upsert syntax.
> mysql:
> {code:java}
> replace into t(id, update_time) values(1, now()); {code}
> pg:
> {code:java}
> INSERT INTO %s (id,name,data_time,remark) VALUES ( ?,?,?,? ) ON CONFLICT
> (id,name) DO UPDATE SET
> id=excluded.id,name=excluded.name,data_time=excluded.data_time,remark=excluded.remark
> {code}
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