timescale-changelog_v2.xml

<?xml version="1.0" encoding="UTF-8"?>
<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-3.8.xsd">

    <changeSet author="stefan.wiedemann@fiware.org" id="v2_step_1">
        <comment>Change type of dataset id and add constraint.</comment>
        <modifyDataType columnName="datasetid"
                        schemaName="public"
                        tableName="attributes"
                        newDataType="varchar"/>
        <addNotNullConstraint columnName="datasetid"
                              schemaName="public"
                              tableName="attributes"
                              defaultNullValue="migration-notNull"
                              columnDataType="varchar"
                              constraintName="dataset_id_not_null_attr"/>
        <rollback>
            <dropNotNullConstraint columnDataType="varchar"
                                   columnName="datasetid"
                                   schemaName="public"
                                   tableName="attributes"/>
            <modifyDataType columnName="datasetid"
                            schemaName="public"
                            tableName="attributes"
                            newDataType="text"/>
        </rollback>
    </changeSet>

    <changeSet author="stefan.wiedemann@fiware.org" id="v2_step_2">
        <comment>Add dataset id to combined primary key for the attributes table.</comment>
        <dropPrimaryKey constraintName="attributes_pkey"
                        dropIndex="true"
                        schemaName="public"
                        tableName="attributes"/>
        <addPrimaryKey
                columnNames="instanceid, ts, datasetid"
                constraintName="attributes_pkey"
                schemaName="public"
                tableName="attributes"
                validate="true"/>
        <rollback>
            <dropPrimaryKey constraintName="attributes_pkey"
                            dropIndex="true"
                            schemaName="public"
                            tableName="attributes"/>
            <addPrimaryKey
                    columnNames="instanceid, ts"
                    constraintName="attributes_pkey"
                    schemaName="public"
                    tableName="attributes"
                    validate="true"/>
        </rollback>
    </changeSet>
</databaseChangeLog>