modifyDataType

Allows you to modify 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:
    4. 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

Examples

--liquibase formatted sql

--changeset liquibase-docs:modifyDataType-example
ALTER  TABLE  cat.person  MODIFY  id  INT;
databaseChangeLog:
-  changeSet:
    id:  modifyDataType-example
    author:  liquibase-docs
    changes:
    -  modifyDataType:
        catalogName:  cat
        columnName:  id
        newDataType:  int
        schemaName:  public
        tableName:  person
{
    "databaseChangeLog": [
        {
            "changeSet": {
                "id": "modifyDataType-example",
                "author": "liquibase-docs",
                "changes": [
                    {
                        "modifyDataType": {
                            "catalogName": "cat",
                            "columnName": "id",
                            "newDataType": "int",
                            "schemaName": "public",
                            "tableName": "person"
                        }
                    }
                ]
            }
        }
    ]
}
<databaseChangeLog
    xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext"
    xmlns:pro="http://www.liquibase.org/xml/ns/pro"
    xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
        http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd
        http://www.liquibase.org/xml/ns/dbchangelog-ext
        http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd
        http://www.liquibase.org/xml/ns/pro
        http://www.liquibase.org/xml/ns/pro/liquibase-pro-latest.xsd">

    <changeSet  author="liquibase-docs"  id="modifyDataType-example">
        <modifyDataType  catalogName="cat"
            columnName="id"
            newDataType="int"
            schemaName="public"
            tableName="person"/>
    </changeSet>

</databaseChangeLog>

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