dropPrimaryKey

The dropPrimaryKey Change Type drops an existing primary key in the table.

Uses

You can typically use the dropPrimaryKey Change Type when you want to remove a field that uniquely defines a record in your database. It can include tableName and other attributes listed in this documentation.

Running the dropPrimaryKey Change Type

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

Now, you should see that the information indicating your primary key is removed from the table.

Available attributes

Examples

--liquibase formatted sql

--changeset liquibase-docs:dropPrimaryKey-example
ALTER  TABLE  department.person  DROP  PRIMARY  KEY;

databaseChangeLog:
-  changeSet:
    id: dropPrimaryKey-example
    author: liquibase-docs
    changes:
    -  dropPrimaryKey:
        constraintName: const_name
        dropIndex: true
        schemaName: public
        tableName: person

{
    "databaseChangeLog": [
        {
            "databaseChangeLog": [
                {
                    "changeSet": {
                        "id": "dropPrimaryKey-example",
                        "author": "liquibase-docs",
                        "changes": [
                            {
                                "dropPrimaryKey": {
                                    "constraintName": "const_name",
                                    "dropIndex": true,
                                    "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="dropPrimaryKey-example">
        <dropPrimaryKey constraintName="const_name"
            dropIndex="true"
            schemaName="public"
            tableName="person"/>
    </changeSet>

</databaseChangeLog>

Database support