dropDefaultValue

Removes the database default value for a column.

Available attributes

Name	Description	Required for	Supports	Since
catalogName	Name of the catalog		all	3.0
columnDataType		informix	all
columnName	Name of column to drop the default value from	all	all
schemaName	Name of the schema		all
tableName	Name of the table to containing the column	all	all

XML example

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

YAML example

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

JSON example

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

SQL example

ALTER  TABLE  cat.person  ALTER  id  DROP  DEFAULT;

Database support

Database	Notes	Auto rollback
DB2/LUW	Supported	No
DB2/z	Supported	No
Derby	Supported	No
Firebird	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
SQL Server	Supported	No
SQLite	Not Supported	No
Sybase	Supported	No
Sybase Anywhere	Supported	No