dropNotNullConstraint
Makes a column nullable.
Available attributes
Name | Description | Required for | Supports | Since |
---|---|---|---|---|
catalogName
|
Name of the catalog | all | 3.0 | |
columnDataType
|
Current data type of the column | informix, mariadb, mssql, mysql | all | |
columnName
|
Name of the column to drop the constraint from | all | all | |
schemaName
|
Name of the schema | all | ||
tableName
|
Name of the table containing that the column to drop the constraint from | all | all |

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

changeSet:
id: dropNotNullConstraint-example
author: liquibase-docs
changes:
- dropNotNullConstraint:
catalogName: cat
columnDataType: int
columnName: id
schemaName: public
tableName: person

{
"changeSet": {
"id": "dropNotNullConstraint-example",
"author": "liquibase-docs",
"changes": [{
"dropNotNullConstraint": {
"catalogName": "cat",
"columnDataType": "int",
"columnName": "id",
"schemaName": "public",
"tableName": "person"
}
}]
}
}

ALTER TABLE cat.person MODIFY id INT NULL;
Database support
Database | Notes | Auto rollback |
---|---|---|
DB2/LUW | Supported | Yes |
DB2/z | Not Supported | No |
Derby | Supported | Yes |
Firebird | Not Supported | No |
H2 | Supported | Yes |
HyperSQL | Supported | Yes |
INGRES | Supported | Yes |
Informix | Supported | Yes |
MariaDB | Supported | Yes |
MySQL | Supported | Yes |
Oracle | Supported | Yes |
PostgreSQL | Supported | Yes |
Snowflake | Supported | Yes |
SQL Server | Supported | Yes |
SQLite | Not Supported | No |
Sybase | Supported | Yes |
Sybase Anywhere | Supported | Yes |