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COALESCE
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
The COALESCE() function produces the first non-NULL value from the variadic list of arguments.
SELECT coalesce(null, null, 1);
create.select(coalesce(null, null, 1)).fetch();
The result being
+----------+ | coalesce | +----------+ | 1 | +----------+
Dialect support
This example using jOOQ:
coalesce(null, null, 1)
Translates to the following dialect specific expressions:
-- ACCESS, ASE, AURORA_MYSQL, AURORA_POSTGRES, COCKROACHDB, CUBRID, DB2, DERBY, FIREBIRD, H2, HANA, HSQLDB, INGRES, MARIADB, -- MEMSQL, MYSQL, ORACLE, POSTGRES, REDSHIFT, SQLDATAWAREHOUSE, SQLITE, SQLSERVER, SYBASE, TERADATA, VERTICA coalesce(NULL, NULL, 1) -- INFORMIX CASE WHEN CASE WHEN NULL IS NOT NULL THEN NULL ELSE NULL END IS NOT NULL THEN CASE WHEN NULL IS NOT NULL THEN NULL ELSE NULL END ELSE 1 END
(These are currently generated with jOOQ 3.15, see #10141)
