Available in versions: Dev (3.21) | Latest (3.20) | 3.19 | 3.18 | 3.17 | 3.16 | 3.15 | 3.14 | 3.13 | 3.12 | 3.11
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.
ALTER TABLE .. ALTER COLUMN .. SET TYPE
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
The type of a column can be changed using the ALTER TABLE's SET TYPE clause on a column:
// Set a new data type on the column
create.alterTable("table").alter("column").set(VARCHAR(50)).execute();
Whether this operation is supported for any given pair of existing/new types is vendor specific. If the existing data doesn't conform to the new type, an error is raised by the database.
Dialect support
This example using jOOQ:
alterTable("t").alter("c").set(VARCHAR(50))
Translates to the following dialect specific expressions:
Access
ALTER TABLE t ALTER c text(50)
ASE, Exasol, MemSQL
ALTER TABLE t MODIFY c varchar(50)
Aurora MySQL, MariaDB, MySQL
ALTER TABLE t CHANGE COLUMN c c varchar(50)
Aurora Postgres, Firebird, Postgres, YugabyteDB
ALTER TABLE t ALTER c TYPE varchar(50)
ClickHouse
ALTER TABLE t MODIFY COLUMN c Nullable(String(50))
CockroachDB
ALTER TABLE t ALTER c TYPE string(50)
Databricks
ALTER TABLE t ALTER COLUMN c TYPE varchar(50)
DB2, Derby, DuckDB
ALTER TABLE t ALTER c SET DATA TYPE varchar(50)
H2, HSQLDB, Snowflake, Sybase
ALTER TABLE t ALTER c varchar(50)
Hana
ALTER TABLE t ALTER(c varchar(50))
Informix
ALTER TABLE t MODIFY c lvarchar(50)
Oracle
ALTER TABLE t MODIFY c varchar2(50)
SQLDataWarehouse, SQLServer
ALTER TABLE t ALTER COLUMN c varchar(50)
Trino
ALTER TABLE t ALTER COLUMN c SET DATA TYPE varchar(50)
BigQuery, Redshift, SQLite, Teradata, Vertica
/* UNSUPPORTED */
Generated with jOOQ 3.21. Support in older jOOQ versions may differ. Translate your own SQL on our website
Feedback
Do you have any feedback about this page? We'd love to hear it!