Change: ‘dropUniqueConstraint’
Drops an existing unique constraint
Available Attributes
| Name | Description |
|---|---|
| catalogName | Name of the catalog@ v3.0E.g. 'cat' |
| constraintName | Name of unique constraint to dropE.g. 'const_name' |
| schemaName | Name of the schemaE.g. 'public' |
| tableName | Name of the table to drop the unique constraint fromE.g. 'person' |
| uniqueColumns | E.g. 'name' |
<changeSet author="liquibase-docs" id="dropUniqueConstraint-example">
<dropUniqueConstraint catalogName="cat"
constraintName="const_name"
schemaName="public"
tableName="person"
uniqueColumns="name"/>
</changeSet>changeSet:
id: dropUniqueConstraint-example
author: liquibase-docs
changes:
- dropUniqueConstraint:
catalogName: cat
constraintName: const_name
schemaName: public
tableName: person
uniqueColumns: name{
"changeSet": {
"id": "dropUniqueConstraint-example",
"author": "liquibase-docs",
"changes": [
{
"dropUniqueConstraint": {
"catalogName": "cat",
"constraintName": "const_name",
"schemaName": "public",
"tableName": "person",
"uniqueColumns": "name"
}
}]
}
}SQL Generated From Above Sample (MySQL)
ALTER TABLE cat.person DROP KEY const_name;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 |