dropColumn

The dropColumn Change Type drops existing columns.To drop a single column, use the simple form of this element where the tableName and columnName are specified as attributes.

To drop several columns, specify the tableName as an attribute, and then specify a set of nested <column> tags. If nested <column> tags are present, the columnName attribute will be ignored. Alternatively, you can use separate dropColumn statements to drop more than one column.

Available attributes

Name

Description

Required for

Supports

Since

catalogName

Name of the catalog

all

3.0

columnName

Name of the column to drop, if dropping a single column. Ignored if nested columns are defined

all

schemaName

Name of the schema

all

tableName

Name of the table containing the column to drop

all

all

Nested tags

Name

Description

Required for

Supports

Multiple allowed

column

Columns to be dropped if dropping multiple columns. If this is populated, the columnName attribute is ignored.

Note: YAML and JSON changelogs using the column tag must nest it within a columns tag.

all

yes

Database support

Database

Notes

Auto Rollback

DB2/LUW

Supported

No

DB2/z

Not Supported

No

Derby

Supported

No

Firebird

Supported

No

Google BigQuery

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

Snowflake

Supported

No

SQL Server

Supported

No

SQLite

Supported

No

Sybase

Supported

No

Sybase Anywhere

Supported

No

dropColumn examples

--liquibase formatted sql
--changeset liquibase-docs:dropColumn-example
ALTER TABLE cat.person
DROP COLUMN address;