src/main/resources/db/changeLog-1.8.xml

<?xml version="1.1" encoding="UTF-8" standalone="no"?>
<databaseChangeLog
  xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
  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-3.10.xsd">

  <changeSet author="mulk" id="1.8-1">
    <sql>
      CREATE TYPE benki.post_scope AS ENUM ('top_level', 'comment');
    </sql>
  </changeSet>

  <changeSet author="mulk" id="1.8-2">
    <addColumn tableName="bookmarks" schemaName="benki">
      <column name="scope" type="benki.post_scope" defaultValue="top_level">
        <constraints nullable="false"/>
      </column>
    </addColumn>

    <addColumn tableName="lazychat_messages" schemaName="benki">
      <column name="scope" type="benki.post_scope" defaultValue="top_level">
        <constraints nullable="false"/>
      </column>
    </addColumn>

    <addColumn tableName="posts" schemaName="benki">
      <column name="scope" type="benki.post_scope" defaultValue="top_level">
        <constraints nullable="false"/>
      </column>
    </addColumn>

    <createIndex tableName="posts"
                 schemaName="benki"
                 indexName="post_scope_id_idx">
      <column name="scope"/>
      <column name="id"/>
    </createIndex>
  </changeSet>

  <changeSet id="1.8-3" author="mulk">
    <createIndex tableName="bookmarks"
                 schemaName="benki"
                 indexName="bookmarks_scope_id_idx">
      <column name="scope"/>
      <column name="id"/>
    </createIndex>

    <createIndex tableName="lazychat_messages"
                 schemaName="benki"
                 indexName="lazychat_messages_scope_id_idx">
      <column name="scope"/>
      <column name="id"/>
    </createIndex>
  </changeSet>

</databaseChangeLog>