From e49323e99fafa302655255cd371f0c82d5d65eaa Mon Sep 17 00:00:00 2001
From: Michael Hoennig <michael@hoennig.de>
Date: Mon, 6 May 2019 19:12:12 +0200
Subject: [PATCH] UserRoleAssignment historicization

---
 ...6185600_constraints_UserRoleAssignment.xml | 14 +++
 .../historicization_UserRoleAssignment.xml    | 87 +++++++++++++++++++
 .../resources/config/liquibase/master.xml     |  4 +
 3 files changed, 105 insertions(+)
 create mode 100644 src/main/resources/config/liquibase/changelog/20190506185600_constraints_UserRoleAssignment.xml
 create mode 100644 src/main/resources/config/liquibase/historicization/historicization_UserRoleAssignment.xml

diff --git a/src/main/resources/config/liquibase/changelog/20190506185600_constraints_UserRoleAssignment.xml b/src/main/resources/config/liquibase/changelog/20190506185600_constraints_UserRoleAssignment.xml
new file mode 100644
index 00000000..2a0e4ec1
--- /dev/null
+++ b/src/main/resources/config/liquibase/changelog/20190506185600_constraints_UserRoleAssignment.xml
@@ -0,0 +1,14 @@
+<?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-3.5.xsd">
+
+    <!-- the natural key used by the historical view must be unique -->
+    <changeSet id="201905061856-1" author="mhoennig">
+
+        <addUniqueConstraint constraintName="ux_user_role_assignment" tableName="user_role_assignment"
+                             columnNames="entity_type_id, entity_object_id, assigned_role, user_id"/>
+
+    </changeSet>
+</databaseChangeLog>
diff --git a/src/main/resources/config/liquibase/historicization/historicization_UserRoleAssignment.xml b/src/main/resources/config/liquibase/historicization/historicization_UserRoleAssignment.xml
new file mode 100644
index 00000000..b5d55fdd
--- /dev/null
+++ b/src/main/resources/config/liquibase/historicization/historicization_UserRoleAssignment.xml
@@ -0,0 +1,87 @@
+<?xml version="1.0" encoding="utf-8"?>
+<databaseChangeLog
+    xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+    xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext"
+    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-3.5.xsd
+                        http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd">
+
+    <!-- Table for historical user_role_assignment data. -->
+    <changeSet id="20190506150000-1" author="mhierweck,mhoennig" dbms="postgresql">
+        <createTable tableName="user_role_assignment_history">
+
+            <!-- history-related columns -->
+
+            <column name="history_id" type="bigint" autoIncrement="true">
+                <constraints primaryKey="true" unique="true" nullable="false"/>
+            </column>
+
+            <column name="history_transaction" type="bigint">
+                <constraints nullable="false" />
+            </column>
+
+            <column name="history_tombstone" type="bool">
+                <constraints nullable="false" />
+            </column>
+
+            <!-- id-column like in base table, but no primary key nor unique -->
+            <column name="id" type="bigint">
+                <constraints primaryKey="true" nullable="false"/>
+            </column>
+
+            <!-- all following columns like in base table, dropping unique constraints -->
+
+            <column name="entity_type_id" type="varchar(255)">
+                <constraints nullable="true" />
+            </column>
+
+            <column name="entity_object_id" type="bigint">
+                <constraints nullable="true" />
+            </column>
+
+            <column name="assigned_role" type="varchar(255)">
+                <constraints nullable="false" />
+            </column>
+
+            <column name="user_id" type="bigint">
+                <constraints nullable="true" />
+            </column>
+
+        </createTable>
+
+    </changeSet>
+
+    <changeSet id="20190506150000-2" author="mhierweck,mhoennig" dbms="postgresql">
+
+        <addForeignKeyConstraint baseColumnNames="history_transaction"
+                                 baseTableName="user_role_assignment_history"
+                                 constraintName="fk_user_role_assignment_history_transaction"
+                                 referencedColumnNames="history_transaction"
+                                 referencedTableName="history"/>
+
+    </changeSet>
+
+    <changeSet id="20190506150000-3" author="mhierweck,mhoennig" dbms="postgresql">
+        <createProcedure>
+            CREATE TRIGGER user_role_assignment_historicize
+            AFTER INSERT OR DELETE OR UPDATE ON user_role_assignment
+            FOR EACH ROW EXECUTE PROCEDURE historicize();
+        </createProcedure>
+        <rollback>
+            DROP TRIGGER user_role_assignment_historicize
+        </rollback>
+    </changeSet>
+
+    <changeSet id="20190506150000-4" author="mhierweck,mhoennig" dbms="postgresql">
+        <createView viewName="user_role_assignment_history_view" replaceIfExists="true">
+            SELECT *
+              FROM user_role_assignment_history
+             WHERE history_id IN (
+                SELECT max(history_id) AS history_id
+                  FROM user_role_assignment_history
+                 WHERE history_transaction &lt;= current_setting('history.transaction')::bigint
+                 GROUP BY entity_type_id, entity_object_id, assigned_role, user_id)
+        </createView>
+    </changeSet>
+
+</databaseChangeLog>
diff --git a/src/main/resources/config/liquibase/master.xml b/src/main/resources/config/liquibase/master.xml
index 9842d7a3..bc1ac640 100644
--- a/src/main/resources/config/liquibase/master.xml
+++ b/src/main/resources/config/liquibase/master.xml
@@ -22,8 +22,12 @@
     <include file="config/liquibase/changelog/20190430154711_added_entity_constraints_UserRoleAssignment.xml" relativeToChangelogFile="false"/>
     <!-- jhipster-needle-liquibase-add-constraints-changelog - JHipster will add liquibase constraints changelogs here -->
 
+    <!-- additional changesets, not generated by JHipster -->
+    <include file="config/liquibase/changelog/20190506185600_constraints_UserRoleAssignment.xml" relativeToChangelogFile="false"/>
+
     <!-- historicization -->
     <include file="config/liquibase/historicization/historicization.xml" relativeToChangelogFile="false"/>
+    <include file="config/liquibase/historicization/historicization_UserRoleAssignment.xml" relativeToChangelogFile="false"/>
 
     <!-- sample data. comes after historicization triggers, historicization applies -->
     <include file="config/liquibase/sample-data/customers.xml" relativeToChangelogFile="false"/>