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

XML example

<changeSet  author="liquibase-docs"  id="dropNotNullConstraint-example">  
    <dropNotNullConstraint  catalogName="cat"  

YAML example

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

JSON example

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

SQL example

ALTER  TABLE  cat.person  MODIFY  id  INT  NULL;

Database support

Database Notes Auto rollback
DB2/LUW Supported Yes
DB2/z Not Supported Yes
Derby Supported Yes
Firebird Not Supported Yes
H2 Supported Yes
HyperSQL Supported Yes
INGRES Supported Yes
Informix Supported Yes
MariaDB Supported Yes
MySQL Supported Yes
Oracle Supported Yes
PostgreSQL Supported Yes
SQL Server Supported Yes
SQLite Not Supported Yes
Sybase Supported Yes
Sybase Anywhere Supported Yes