modifyDataType

Allows you to modify the data types of columns in a table.

Run modifyDataType

To run this Change Type, follow these steps:

  1. Add the Change Type to your changeset, as shown in the examples on this page.

  2. Specify any required attributes. Use the table on this page to see which ones your database requires.

  3. Deploy your changeset by running the update command:liquibase update

Available attributes

Name

Description

Required for

Supports

Since

catalogName

Name of the catalog

all

3.0

columnName

Name of the column

all

all

newDataType

Data type to convert the column to. Only modifies the data type itself and cannot define constraints

all

all

schemaName

Name of the schema

all

tableName

Name of the table containing the column whose data type you want to change

all

all

Database support

Database

Notes

Auto Rollback

DB2/LUW

Supported

No

DB2/z

Not Supported

No

Derby

Supported

No

Firebird

Supported

No

Google BigQuery

Supported

No

H2

Supported

No

HyperSQL

Supported

No

INGRES

Supported

No

Informix

Supported

No

MariaDB

Supported

No

MySQL

Supported

No

Oracle

Supported

No

PostgreSQL

Supported

No

Snowflake

Supported

No

SQL Server

Supported

No

SQLite

Not Supported

No

Sybase

Supported

No

Sybase Anywhere

Supported

No

modifyDataType examples

--liquibase formatted sql
--changeset liquibase-docs:modifyDataType-example
ALTER TABLE cat.person MODIFY id INT;