Knack API SQL Driver

Invantive UniversalSQL is the fastest, easiest and most reliable way to exchange data with the Knack API.

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Knack is a low-code platform to build online databases.

The Knack driver covers 39 tables and 751 columns.

Knack API Clients

Invantive UniversalSQL is available on many user interfaces ("clients" in traditional server-client paradigma). All Invantive UniversalSQL statements can be exchanged with a close to 100% compatibility across all clients and operating systems (Windows, MacOS, Linux, iOS, Android).

The clients include Microsoft Excel, Microsoft Power BI, Microsoft Power Query, Microsoft Word and Microsoft Outlook. Web-based clients include Invantive Cloud, Invantive Bridge Online as OData proxy, Invantive App Online for interactive apps, Online SQL Editor for query execution and Invantive Data Access Point as extended proxy.

The Knack Power BI connector is based on the Invantive UniversalSQL driver for Knack, completed by a high-performance OData connector which works straight on Power BI without any add-on. The OData protocol is always version 4, independent whether the backing platform uses OData, SOAP or another protocol.

For technical users there are command-line editions of Invantive Data Hub running on iOS, Android, Windows, MacOS and Linux. Invantive Data Hub is also often used for enterprise server applications such as ETL. High-volume replication of data taken from the Knack API into traditional databases such as SQL Server (on-premise and Azure), MySQL, PostgreSQL and Oracle is possible using Invantive Data Replicator. Invantive Data Replicator automatically creates and maintains Knack datawarehouses, possibly in combination with data from over 70 other (cloud) platforms. Data Replicator supports data volumes up to over 1 TB and over 5.000 companies. The on-premise edition of Invantive Bridge offers an Knack ADO.net provider.

Finally, online web apps can be build for Knack using App Online of Invantive Cloud.

Monitor API Calls

When a query or DML-statement has been executed on Invantive UniversalSQL a developer can evaluate the actual calls made to the Knack API using a query on sessionios@DataDictionary. As an alternative, extensive request and response logging can be enabled by setting log-native-calls-to-disk to true. In the %USERPROFILE%\Invantive\NativeLog folder Invantive UniversalSQL will create log files per API request and response.

Specifications

The SQL driver for Knack does not support partitioning. Define one data container in a database for each company in Knack to enable parallel access for data from multiple companies.

An introduction into the concepts of Invantive UniversalSQL such as databases, data containers and partitioning can be found in the Invantive UniversalSQL grammar.

The configuration can be changed using various attributes during log on and use. A full list of configuration options is listed in the driver attributes.

The catalog name is used to compose the full qualified name of an object like a table or view. The schema name is used to compose the full qualified name of an object like a table or view. On Knack the comparison of two texts is case sensitive by default.

Changes and bug fixes on the Knack SQL driver can be found in the release notes. Get access to the Knack community through the Knack section of the Invantive forums.

Driver code for use in settings.xml: Knack

Alias: knack

Recommended alias: knk

More technical documentation as provided by the supplier of the Knack API on the native APIconnection used can be found at https://www.knack.com/developer-documentation.

AuthenticationAuthentication can be done using one of the following two alternatives:1. Using the user log on code and password to access Knack views.2. Using an API key to access Knack objects.The API key can be found on the 'API & Code' page in Knack available through the settings gear on the top-left corner next to the word 'Integration'. The URL for the API key is https://builder.knack.com/SAMPLE/integration#settings/api, with 'SAMPLE' replaced by your slug. The slug is the word before 'knack.com' when running your app.

Usage LimitsInvantive UniversalSQL executes API calls to retrieve and upload data. The number of API calls allowed per hour depends on your Knack plan. The default usage limits vary depending on plan between 1.000 and 25.000 calls per day, with a limit of 10 calls per second. Invantive UniversalSQL ensures that within your session the number of calls allowed per hour is not exceeded.To get an impression of how Invantive UniversalSQL translates into API calls, please query the data dictionary view 'sessionios', such as with 'select * from sessionios@datadictionary'.

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