diff --git a/others/db_changes/Data_alias/basic/2019.2/changelog.xml b/others/db_changes/Data_alias/basic/2019.2/changelog.xml
index 1c4c46577a0f19f15c846472c1b464a1675c929e..4c52dd94a3dc64670f5cdfb1822d724e6253d2ec 100644
--- a/others/db_changes/Data_alias/basic/2019.2/changelog.xml
+++ b/others/db_changes/Data_alias/basic/2019.2/changelog.xml
@@ -124,5 +124,9 @@
     <include relativeToChangelogFile="true" file="offer_add_date_editnew_user_editnew.xml"/>
     <include relativeToChangelogFile="true" file="attributerelation_add_date_editnew_user_editnew.xml"/>
     <include relativeToChangelogFile="true" file="communication_add_date_editnew_user_editnew.xml"/>
-
+    
+    <include relativeToChangelogFile="true" file="indicesRefactor/ContactManagement.xml"/>
+    <include relativeToChangelogFile="true" file="indicesRefactor/Keyword.xml"/>
+    <include relativeToChangelogFile="true" file="indicesRefactor/Activity.xml"/>
+    <include relativeToChangelogFile="true" file="indicesRefactor/Task.xml"/>
 </databaseChangeLog>
diff --git a/others/db_changes/Data_alias/basic/2019.2/indicesRefactor/Activity.xml b/others/db_changes/Data_alias/basic/2019.2/indicesRefactor/Activity.xml
new file mode 100644
index 0000000000000000000000000000000000000000..c25802bbc3f40bb293a814d354247c1424812d34
--- /dev/null
+++ b/others/db_changes/Data_alias/basic/2019.2/indicesRefactor/Activity.xml
@@ -0,0 +1,14 @@
+<?xml version="1.1" encoding="UTF-8" standalone="no"?>
+<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-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.6.xsd">
+	<changeSet author="j.goderbauer" id="9b4644f6-3060-4791-b9f5-684939b78dcb">
+		<createIndex indexName="IDX_ACTIVITY_PARENT" tableName="ACTIVITY">
+			<column name="PARENT_CONTEXT"/>
+			<column name="PARENT_ID"/>
+		</createIndex>
+		<createIndex indexName="IDX_ACTIVITYLINK_ACTIVITY_ID" tableName="ACTIVITYLINK">
+			<column name="ACTIVITY_ID"/>
+		</createIndex>
+	</changeSet>
+</databaseChangeLog>
\ No newline at end of file
diff --git a/others/db_changes/Data_alias/basic/2019.2/indicesRefactor/ContactManagement.xml b/others/db_changes/Data_alias/basic/2019.2/indicesRefactor/ContactManagement.xml
new file mode 100644
index 0000000000000000000000000000000000000000..d5febea39b249fceb6f2e0e6612585a5847414a9
--- /dev/null
+++ b/others/db_changes/Data_alias/basic/2019.2/indicesRefactor/ContactManagement.xml
@@ -0,0 +1,23 @@
+<?xml version="1.1" encoding="UTF-8" standalone="no"?>
+<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-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.6.xsd">
+	<changeSet author="j.goderbauer" id="0f2ec94d-75d0-42d9-8026-d70197f0ded4">
+		<createIndex indexName="IDX_ADDRESS_CONTACT_ID" tableName="ADDRESS">
+			<column name="CONTACT_ID"/>
+		</createIndex>
+		<createIndex indexName="IDX_CONTACT_ANY_CONTACT" tableName="CONTACT">
+			<column name="PERSON_ID"/>
+			<column name="ORGANISATION_ID"/>
+		</createIndex>
+		<createIndex indexName="IDX_CONTACT_ADDRESS_ID" tableName="CONTACT">
+			<column name="ADDRESS_ID"/>
+		</createIndex>
+		<createIndex indexName="IDX_COMMUNICATION_CONTACT_ID" tableName="COMMUNICATION">
+			<column name="CONTACT_ID"/>
+		</createIndex>
+		<createIndex indexName="IDX_COMMUNICATION_MEDIUM_ID" tableName="COMMUNICATION">
+			<column name="MEDIUM_ID"/>
+		</createIndex>
+	</changeSet>
+</databaseChangeLog>
\ No newline at end of file
diff --git a/others/db_changes/Data_alias/basic/2019.2/indicesRefactor/Keyword.xml b/others/db_changes/Data_alias/basic/2019.2/indicesRefactor/Keyword.xml
new file mode 100644
index 0000000000000000000000000000000000000000..6bda5489c9a6e0d9882d7f9c99d15e0ed22579bd
--- /dev/null
+++ b/others/db_changes/Data_alias/basic/2019.2/indicesRefactor/Keyword.xml
@@ -0,0 +1,18 @@
+<?xml version="1.1" encoding="UTF-8" standalone="no"?>
+<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-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.6.xsd">
+	<changeSet author="j.goderbauer" id="95a53a6c-6157-4fc8-a4cb-501da22ad326">
+		<!-- the database will propably never use these indices since there are too less entries within the tables 
+		but IF there should be a lot of entries (thanks to imports or else) there are at least indices -->
+		<createIndex indexName="IDX_KWD_ENTRY_CONTAINER" tableName="AB_KEYWORD_ENTRY">
+			<column name="CONTAINER"/>
+		</createIndex>
+		<createIndex indexName="IDX_KWD_ATTR_CONTAINER" tableName="AB_KEYWORD_ATTRIBUTE">
+			<column name="CONTAINER"/>
+		</createIndex>
+		<createIndex indexName="IDX_KWD_ATTRREL_KWD_ENTRY_ID" tableName="AB_KEYWORD_ATTRIBUTERELATION">
+			<column name="AB_KEYWORD_ENTRY_ID"/>
+		</createIndex>
+	</changeSet>
+</databaseChangeLog>
\ No newline at end of file
diff --git a/others/db_changes/Data_alias/basic/2019.2/indicesRefactor/Task.xml b/others/db_changes/Data_alias/basic/2019.2/indicesRefactor/Task.xml
new file mode 100644
index 0000000000000000000000000000000000000000..a6b5f7c38c4e82f30116968adadf5aebeca75bd8
--- /dev/null
+++ b/others/db_changes/Data_alias/basic/2019.2/indicesRefactor/Task.xml
@@ -0,0 +1,20 @@
+<?xml version="1.1" encoding="UTF-8" standalone="no"?>
+<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-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.6.xsd">
+	<changeSet author="j.goderbauer" id="038575fd-cbf2-452a-8eae-0b594779cd1b">
+		<createIndex indexName="IDX_TASK_REQUESTOR_CONTACT_ID" tableName="TASK">
+			<column name="REQUESTOR_CONTACT_ID"/>
+		</createIndex>
+		<createIndex indexName="IDX_TASK_EDITOR_CONTACT_ID" tableName="TASK">
+			<column name="EDITOR_CONTACT_ID"/>
+		</createIndex>
+		<createIndex indexName="IDX_TASK_PARENT" tableName="TASK">
+			<column name="PARENT_CONTEXT"/>
+			<column name="PARENT_ID"/>
+		</createIndex>
+		<createIndex indexName="IDX_TASKLINK_TASK_ID" tableName="TASKLINK">
+			<column name="TASK_ID"/>
+		</createIndex>
+	</changeSet>
+</databaseChangeLog>
\ No newline at end of file