Alter Standard Table - Collation

Modifies the default DDL collation for string columns in the table.

Known limitations:

  • This change type does not support automatic rollback.

  • Snowflake snapshots created with Liquibase Secure 5.1 are incompatible with earlier versions due to enhanced object type detection for TABLES and VIEWS. Regenerate all snapshots with 5.1 after upgrading to avoid false differences in diff and diff-changelog operations.

Available attributes

Attribute

Type

Description

Required

catalogName

String

Name of the catalog (database) containing the table

No

schemaName

String

Name of the schema containing the table

No

tableName

String

Name of the table to alter

Yes

ifExists

Boolean

Only execute if the table exists

No

alterCollation nested attributes

Attribute

Type

Description

Required

newDefaultDdlCollation

String

New default collation (e.g., utf8)

No*

unsetDefaultDdlCollation

Boolean

If true, unsets the default collation

No*

*Exactly one of newDefaultDdlCollation or unsetDefaultDdlCollation must be specified.

<?xml version="1.0" encoding="UTF-8"?>
<databaseChangeLog
  xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
  xmlns:pro-snowflake="http://www.liquibase.org/xml/ns/pro-snowflake"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
        http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd
        http://www.liquibase.org/xml/ns/pro-snowflake
        http://www.liquibase.org/xml/ns/pro-snowflake/liquibase-pro-snowflake-latest.xsd">
  <!-- Set default collation -->
  <changeSet id="set-collation" author="examples">
    <pro-snowflake:alterStandardTable tableName="MULTILINGUAL_DATA">
      <pro-snowflake:alterCollation newDefaultDdlCollation="utf8"/>
    </pro-snowflake:alterStandardTable>
  </changeSet>
  <!-- Unset default collation -->
  <changeSet id="unset-collation" author="examples">
    <pro-snowflake:alterStandardTable tableName="SIMPLE_DATA">
      <pro-snowflake:alterCollation unsetDefaultDdlCollation="true"/>
    </pro-snowflake:alterStandardTable>
  </changeSet>
</databaseChangeLog>