Alter Standard Table - Schema Evolution

Modifies schema evolution settings. Schema evolution enables flexible schema changes without explicit DDL commands.

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

alterSchemaEvolution nested attributes

Attribute

Type

Description

Required

newEnableSchemaEvolution

Boolean

New schema evolution value

No*

unsetEnableSchemaEvolution

Boolean

If true, unsets schema evolution

No*

*Exactly one of newEnableSchemaEvolution or unsetEnableSchemaEvolution 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">
  <!-- Enable schema evolution -->
  <changeSet id="enable-schema-evolution" author="examples">
    <pro-snowflake:alterStandardTable tableName="FLEXIBLE_SCHEMA">
      <pro-snowflake:alterSchemaEvolution newEnableSchemaEvolution="true"/>
    </pro-snowflake:alterStandardTable>
  </changeSet>
  <!-- Disable schema evolution -->
  <changeSet id="disable-schema-evolution" author="examples">
    <pro-snowflake:alterStandardTable tableName="STRICT_SCHEMA">
      <pro-snowflake:alterSchemaEvolution newEnableSchemaEvolution="false"/>
    </pro-snowflake:alterStandardTable>
  </changeSet>
  <!-- Unset schema evolution -->
  <changeSet id="unset-schema-evolution" author="examples">
    <pro-snowflake:alterStandardTable tableName="LEGACY_TABLE">
      <pro-snowflake:alterSchemaEvolution unsetEnableSchemaEvolution="true"/>
    </pro-snowflake:alterStandardTable>
  </changeSet>
</databaseChangeLog>