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:

liquibase update

Available attributes

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