alterDynamicTable alterTargetLag

Modifies the target lag for automatic refreshes. Target lag controls how fresh the data in the dynamic table should be.

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 dynamic table to alter

Yes

ifExists

Boolean

Only execute if the table exists

No

alterTargetLag nested attributes

Attribute

Type

Description

Required

newTargetLag

String

New target lag (e.g., 10 MINUTES, 1 HOUR, DOWNSTREAM)

Yes

<?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 time-based target lag -->
  <changeSet id="set-target-lag" author="examples">
    <pro-snowflake:alterDynamicTable tableName="REALTIME_SUMMARY">
      <pro-snowflake:alterTargetLag newTargetLag="5 MINUTES"/>
    </pro-snowflake:alterDynamicTable>
  </changeSet>
  <!-- Set DOWNSTREAM target lag -->
  <changeSet id="set-downstream-lag" author="examples">
    <pro-snowflake:alterDynamicTable tableName="DEPENDENT_SUMMARY">
      <pro-snowflake:alterTargetLag newTargetLag="DOWNSTREAM"/>
    </pro-snowflake:alterDynamicTable>
  </changeSet>
</databaseChangeLog>