Tableau: Starter tutorial

Author: Georg Traar

docs/integrate/tableau/index.md

@@ -34,8 +34,8 @@ In this tutorial, you will:
 :::
 
 :::{grid-item-card} Article: Using CrateDB with Tableau
-:link: https://community.cratedb.com/t/using-cratedb-with-tableau/1192
-:link-type: url
+:link: tableau-tutorial
+:link-type: ref
 How to install the latest PostgreSQL JDBC driver (e.g.
 `postgresql-42.7.1.jar` or newer) for using Tableau.
 :::
@@ -62,6 +62,13 @@ We are tracking interoperability issues per [Tool: Tableau] and
 [CrateDB and Tableau]
 ```
 
+:::{toctree}
+:maxdepth: 1
+:hidden:
+Tutorial <tutorial>
+:::
+
+
 [Connector: Issues]: https://github.com/crate/cratedb-tableau-connector/issues
 [CrateDB and Tableau]: https://cratedb.com/integrations/cratedb-and-tableau
 [Tableau]: https://www.tableau.com/

docs/integrate/tableau/tutorial.md

@@ -0,0 +1,70 @@
+(tableau-tutorial)=
+# Using CrateDB with Tableau
+
+For using Tableau with CrateDB, install the latest PostgreSQL driver, as detailed in the steps below.
+
+1. Download the Java 8 JDBC driver (e.g. `postgresql-42.7.1.jar` or newer) from https://jdbc.postgresql.org/download/. 
+2. Move the downloaded `.jar`-file (e.g. `postgresql-42.7.1.jar`) into the Tableau Driver folder.
+    > * **Windows**: `C:\Program Files\Tableau\Drivers`
+    > * **Mac**: `~/Library/Tableau/Drivers`
+    > * **Linux**: `/opt/tableau/tableau_driver/jdbc`
+3. Open Tableau.
+4. Create a `PostgreSQL` connection.
+
+   ![image|454x500, 75%](https://us1.discourse-cdn.com/flex020/uploads/crate/original/2X/c/cf27bb4288737b66d2af620092f529f481dbe328.jpeg){height=500px}
+5. Start using Tableau with CrateDB.
+
+## Using Tableau with CrateDB 5.1 and earlier
+::::{dropdown} **Details**
+
+As of CrateDB 5.0.0 there are still some features missing to directly
+use the default PostgreSQL Connector in CrateDB (e.g. `DECLARE CURSOR` support).
+Therefore, it is best to use a `Other Databases (JDBC)` connection with the
+latest PostgreSQL JDBC Driver. To improve the user experience Tableau allows
+to customize connections using `.tdc` (Tableau Datasource Customization) files.
+
+If we see significant demand, we might look into creating a custom Tableau Connector,
+however we also expect CrateDB to be fully compatible with the default PostgreSQL
+Connector soon.
+
+## Customize CrateDB Connection
+
+1. Download the [latest PostgreSQL JDBC Driver](https://jdbc.postgresql.org/download/)
+2. Move the downloaded `.jar`-file (e.g. `postgresql-42.4.1.jar`) into the Tableau Driver folder
+    > * **Windows**: `C:\Program Files\Tableau\Drivers`
+    > * **Mac**: `~/Library/Tableau/Drivers`
+    > * **Linux**: `/opt/tableau/tableau_driver/jdbc`
+    >
+    > *also see https://help.tableau.com/current/pro/desktop/en-us/examples_otherdatabases_jdbc.htm*
+3. Create an empty [.tdc](https://help.tableau.com/current/pro/desktop/en-us/connect_customize.htm) (Tableau Datasource Customization) file e.g. `crate-jdbc.tdc`
+4. Copy the following content into the file:
+    ```xml
+    <connection-customization class='genericjdbc' enabled='true' version='10.0'>
+        <vendor name='genericjdbc' />
+        <driver name='postgresql' />
+        <customizations>
+            <customization name='CAP_CONNECT_STORED_PROCEDURE' value='no'/>
+            <customization name='CAP_CREATE_TEMP_TABLES' value='no'/>
+            <customization name='CAP_FAST_METADATA' value='yes'/>
+            <customization name="CAP_FORCE_COUNT_FOR_NUMBEROFRECORDS" value="yes"/>
+            <customization name='CAP_JDBC_QUERY_ASYNC' value='yes'/>
+            <customization name='CAP_JDBC_QUERY_CANCEL' value='yes'/>
+            <customization name='CAP_QUERY_HAVING_REQUIRES_GROUP_BY' value='no'/>
+            <customization name="CAP_QUERY_SUBQUERIES_WITH_TOP" value="yes"/>
+            <customization name="CAP_QUERY_TOP_N" value="yes"/>
+            <customization name='CAP_QUERY_TOPSTYLE_LIMIT' value='yes'/>
+            <customization name='CAP_SELECT_INTO' value='no'/>
+            <customization name='CAP_SUPPRESS_TEMP_TABLE_CHECKS' value='yes'/>
+        </customizations>
+    </connection-customization> 
+    ```
+5. Save the `.tdc-file` in your `Datasources` folder (e.g. `/Users/<username>/Documents/My Tableau Repository/Datasources/crate-jdbc.tdc`
+6. Open Tableau
+7. Create an `Other Databases (JDBC)` connection
+    > **URL**: jdbc:postgresql://localhost:5432/doc
+    > **Dialect**: PostgreSQL
+    > **Username**: crate
+    > **Password**:
+8. Start using Tableau with CrateDB :)
+
+::::