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ALTER TABLE .. ALTER COLUMN .. SET DEFAULT
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
A column DEFAULT value can be added to a column using the ALTER TABLE's SET DEFAULT clause on a column:
// Specify a new default value for a column
create.alterTable("table").alter("column").setDefault(1).execute();
Dialect support
This example using jOOQ:
alterTable("t").alter("c").setDefault(1)
Translates to the following dialect specific expressions:
Access, Aurora Postgres, CockroachDB, DB2, Derby, DuckDB, Exasol, Firebird, H2, HSQLDB, Postgres, Snowflake, Sybase, YugabyteDB
ALTER TABLE t ALTER c SET DEFAULT 1
ASE
ALTER TABLE t REPLACE c DEFAULT 1
Aurora MySQL, BigQuery, MariaDB, MySQL, Vertica
ALTER TABLE t ALTER COLUMN c SET DEFAULT 1
ClickHouse
ALTER TABLE t MODIFY COLUMN c DEFAULT 1
MemSQL, Oracle
ALTER TABLE t MODIFY c DEFAULT 1
SQLServer
DECLARE @constraint NVARCHAR(max);
DECLARE @command NVARCHAR(max);
SELECT @constraint = name
FROM sys.default_constraints
WHERE parent_object_id = object_id('t')
AND parent_column_id = columnproperty(object_id('t'), 'c', 'ColumnId');
IF @constraint IS NOT NULL
BEGIN
SET @command = 'ALTER TABLE ' + 't' + ' DROP CONSTRAINT ' + @constraint
EXECUTE sp_executesql @command
SET @command = 'ALTER TABLE ' + 't' + ' ADD CONSTRAINT ' + @constraint + ' DEFAULT ' + '1' + ' FOR ' + 'c'
EXECUTE sp_executesql @command
END
ELSE
BEGIN
SET @command = 'ALTER TABLE ' + 't' + ' ADD DEFAULT ' + '1' + ' FOR ' + 'c'
EXECUTE sp_executesql @command
END
Hana, Informix, Redshift, SQLDataWarehouse, SQLite, Teradata, Trino
/* UNSUPPORTED */
Generated with jOOQ 3.20. Translate your own SQL on our website
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