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Available in versions: Dev (3.21) | Latest (3.20)

This documentation is for the unreleased development version of jOOQ. Click on the above version links to get this documentation for a supported version of jOOQ.

WHEN NOT MATCHED AND ..

Applies to ✅ Open Source Edition   ✅ Express Edition   ✅ Professional Edition   ✅ Enterprise Edition

Various dialects support the standard SQL syntax for having multiple WHEN clauses, where an additional predicates are supplied with each clause.

This works in a similar way to a CASE expression, where the first matching CASE gets applied.

If the syntax isn't supported in a dialect, it can be emulated by collapsing the various WHEN clauses into a single one that uses a CASE expression to cover all the conditions and results.

Dialect support

This example using jOOQ:

mergeInto(BOOK_TO_BOOK_STORE)
    .using(BOOK_TO_BOOK_STORE_STAGING)
    .on(BOOK_TO_BOOK_STORE.BOOK_ID.eq(BOOK_TO_BOOK_STORE_STAGING.BOOK_ID)
        .and(BOOK_TO_BOOK_STORE.NAME.eq(BOOK_TO_BOOK_STORE_STAGING.NAME)))
    .whenNotMatchedAnd(BOOK_TO_BOOK_STORE_STAGING.STOCK.gt(100))
    .thenInsert(
        BOOK_TO_BOOK_STORE.BOOK_ID,
        BOOK_TO_BOOK_STORE.NAME,
        BOOK_TO_BOOK_STORE.STOCK
    )
    .values(
        BOOK_TO_BOOK_STORE_STAGING.BOOK_ID,
        BOOK_TO_BOOK_STORE_STAGING.NAME,
        BOOK_TO_BOOK_STORE_STAGING.STOCK
    )

Translates to the following dialect specific expressions:

DB2, Databricks, Derby, Firebird, H2, HSQLDB, Hana, Informix, Postgres, Snowflake, Sybase, Vertica

MERGE INTO BOOK_TO_BOOK_STORE
USING BOOK_TO_BOOK_STORE_STAGING
ON (
  BOOK_TO_BOOK_STORE.BOOK_ID = BOOK_TO_BOOK_STORE_STAGING.BOOK_ID
  AND BOOK_TO_BOOK_STORE.NAME = BOOK_TO_BOOK_STORE_STAGING.NAME
)
WHEN NOT MATCHED AND BOOK_TO_BOOK_STORE_STAGING.STOCK > 100 THEN INSERT (BOOK_ID, NAME, STOCK)
VALUES (
  BOOK_TO_BOOK_STORE_STAGING.BOOK_ID, 
  BOOK_TO_BOOK_STORE_STAGING.NAME, 
  BOOK_TO_BOOK_STORE_STAGING.STOCK
)

Exasol, Teradata

MERGE INTO BOOK_TO_BOOK_STORE
USING BOOK_TO_BOOK_STORE_STAGING
ON (
  BOOK_TO_BOOK_STORE.BOOK_ID = BOOK_TO_BOOK_STORE_STAGING.BOOK_ID
  AND BOOK_TO_BOOK_STORE.NAME = BOOK_TO_BOOK_STORE_STAGING.NAME
)
WHEN NOT MATCHED THEN INSERT (BOOK_ID, NAME, STOCK)
VALUES (
  BOOK_TO_BOOK_STORE_STAGING.BOOK_ID, 
  BOOK_TO_BOOK_STORE_STAGING.NAME, 
  BOOK_TO_BOOK_STORE_STAGING.STOCK
)
WHERE BOOK_TO_BOOK_STORE_STAGING.STOCK > 100

Oracle

MERGE INTO BOOK_TO_BOOK_STORE
USING BOOK_TO_BOOK_STORE_STAGING
ON ((
  BOOK_TO_BOOK_STORE.BOOK_ID = BOOK_TO_BOOK_STORE_STAGING.BOOK_ID
  AND BOOK_TO_BOOK_STORE.NAME = BOOK_TO_BOOK_STORE_STAGING.NAME
))
WHEN NOT MATCHED THEN INSERT (BOOK_ID, NAME, STOCK)
VALUES (
  BOOK_TO_BOOK_STORE_STAGING.BOOK_ID, 
  BOOK_TO_BOOK_STORE_STAGING.NAME, 
  BOOK_TO_BOOK_STORE_STAGING.STOCK
)
WHERE BOOK_TO_BOOK_STORE_STAGING.STOCK > 100

SQLServer

MERGE INTO BOOK_TO_BOOK_STORE
USING BOOK_TO_BOOK_STORE_STAGING
ON (
  BOOK_TO_BOOK_STORE.BOOK_ID = BOOK_TO_BOOK_STORE_STAGING.BOOK_ID
  AND BOOK_TO_BOOK_STORE.NAME = BOOK_TO_BOOK_STORE_STAGING.NAME
)
WHEN NOT MATCHED AND BOOK_TO_BOOK_STORE_STAGING.STOCK > 100 THEN INSERT (BOOK_ID, NAME, STOCK)
VALUES (
  BOOK_TO_BOOK_STORE_STAGING.BOOK_ID, 
  BOOK_TO_BOOK_STORE_STAGING.NAME, 
  BOOK_TO_BOOK_STORE_STAGING.STOCK
);

ASE, Access, Aurora MySQL, Aurora Postgres, BigQuery, ClickHouse, CockroachDB, DuckDB, MariaDB, MemSQL, MySQL, Redshift, SQLDataWarehouse, SQLite, Trino, YugabyteDB

/* UNSUPPORTED */
Generated with jOOQ 3.21. Translate your own SQL on our website

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