Azure DevOps Connector for SQL Server

Azure DevOps Connector can be used to integrate Azure DevOps data in your App / BI Tools. You can create, read, query, modify, and delete WorkItems, Projects, Teams and more.

In this article you will learn how to quickly and efficiently integrate Azure DevOps data in SQL Server without coding. We will use high-performance Azure DevOps Connector to easily connect to Azure DevOps and then access the data inside SQL Server.

Let's follow the steps below to see how we can accomplish that!

Download Documentation

Video Tutorial - Integrate Azure DevOps data in SQL Server

This video covers the following topics and more, so please watch carefully. After watching the video, follow the steps outlined in this article:

  • How to download and install the required PowerPack for Azure DevOps integration in SQL Server
  • How to configure the connection for Azure DevOps
  • Features of the ZappySys API Driver (Authentication / Query Language / Examples / Driver UI)
  • How to use the Azure DevOps in SQL Server

Create Data Source in ZappySys Data Gateway based on API Driver

  1. Download and install ODBC PowerPack.

  2. Search for gateway in start menu and Open ZappySys Data Gateway:
    Open ZappySys Data Gateway

  3. Go to Users Tab to add our first Gateway user. Click Add; we will give it a name tdsuser and enter password you like to give. Check Admin option and click OK to save. We will use these details later when we create linked server:
    ZappySys Data Gateway - Add User

  4. Now we are ready to add a data source. Click Add, give data source a name (Copy this name somewhere, we will need it later) and then select Native - ZappySys API Driver. Finally, click OK. And it will create the Data Set for it and open the ZS driver UI.

    AzureDevopsDSN

    ZappySys Data Gateway - Add Data Source

  5. When the Configuration window appears give your data source a name if you haven't done that already, then select "Azure DevOps" from the list of Popular Connectors. If "Azure DevOps" is not present in the list, then click "Search Online" and download it. Then set the path to the location where you downloaded it. Finally, click Continue >> to proceed with configuring the DSN:

    AzureDevopsDSN
    Azure DevOps
    ODBC DSN Template Selection
  6. Now it's time to configure the Connection Manager. Select Authentication Type, e.g. Token Authentication. Then select API Base URL (in most cases, the default one is the right one). More info is available in the Authentication section.

    Steps how to get and use Azure DevOps credentials
    Connecting to your Azure DevOps data requires you to authenticate your REST API access. Follow the instructions below:
    1. Go to https://app.vsaex.visualstudio.com/app/register to register your app.
    2. Fill in your application and company's information as required, and then select the scopes that your application needs. This should typically be Project and team (read and write) and Work items (read and write).
      Your selected scopes when registering your app must match the scopes you enter here on the connector screen. If they don't match, the connector will not be able to work with your Azure DevOps account!
      If you need further information about the scopes used in Azure DevOps, or need to see what to enter into the connector screen to match up with your selected scopes, visit https://learn.microsoft.com/en-us/azure/devops/integrate/get-started/authentication/oauth?view=azure-devops.
      Create OAuth application in Azure DevOps

      NOTE: For Authorization callback URL use your company's OAuth Redirect URL (if IT administrator provides you one) or you can use https://zappysys.com/oauth (it's safe).

    3. Select Create Application and then the Application Settings page will be displayed.
    4. Record the App ID for us to use later: Copy App ID in Azure DevOps
    5. And do the same with Client Secret: Use Client Secret to read Azure DevOps REST API data
    6. Then go to https://aex.dev.azure.com and select relevant organization on the left.
    7. Then copy Organization's host name part (e.g. acmeinc, if full host name is acmeinc.visualstudio.com), save it to a file, and click it: Copy Organization Host in Azure DevOps
    8. Back at the connector screen, enter the App ID into the Client Id (App ID) field that was recorded in the previous step.
    9. Enter the Client Secret that was recorded in the previous step into the Client Secret field. In order to edit the text in this field, select the ellipses (...) button that appears when the textbox is clicked, and edit the Client Secret with the dialog box that appears.
    10. Enter the organization that was recorded in step 5 into the Organization name or Id for url field.
    11. Click Generate Token. If proper authentication occurs, you will see a notice saying so. You can click Yes to save a backup file of your generated tokens.
    12. Select the project you want to connect to by default from the Default Project (Choose after Generating Token) field.
    13. Select the Security tab.
    14. Enter https://auditservice.dev.azure.com,https://almsearch.dev.azure.com into the Additional Trusted Domains field.
    15. Select the Test Connection button at the bottom of the window to verify proper connectivity with your Azure DevOps account.
    16. If the connection test succeeds, select OK.
    17. To edit previously created app you can visit https://app.vsaex.visualstudio.com/me and see Applications and services section. Click on your desired app name.

    Fill in all required parameters and set optional parameters if needed:

    AzureDevopsDSN
    Azure DevOps
    OAuth [OAuth]
    https://dev.azure.com
    Required Parameters
    Client Id (App ID) Fill-in the parameter...
    Client Secret Fill-in the parameter...
    Organization name or Id for url (e.g. mycompany) Fill-in the parameter...
    Return URL Fill-in the parameter...
    Scopes (Must match with App Registration) Fill-in the parameter...
    API Version Fill-in the parameter...
    Optional Parameters
    Default Project Name (Choose after Generating Token)
    RetryMode RetryWhenStatusCodeMatch
    RetryStatusCodeList 429
    RetryCountMax 5
    RetryMultiplyWaitTime True
    ODBC DSN Oauth Connection Configuration
    Steps how to get and use Azure DevOps credentials
    To connect to Azure DevOps using a Personal Access Token (PAT), you must first create a valid PAT:
    1. Start by by going to https://aex.dev.azure.com and selecting relevant organization on the left.
    2. Then copy Organization's host name part (e.g. acmeinc, if full host name is acmeinc.visualstudio.com), save it to a file, and click it: Copy Organization Host in Azure DevOps
    3. Next, click User settings icon and then click Personal access tokens: Click User Settings icon in Azure DevOps
    4. Then click New Token button to create a new personal access token: Create new token in Azure DevOps
    5. Continue by...
      • naming your token
      • selecting the right Organization
      • setting token's Expiration date (it's recommended to use Custom defined option and make it expire after one year or later)
      • and setting the Scopes:
      Finish creating token in Azure DevOps

      NOTE: You may be restricted from creating full-scoped PATs. If so, your Azure DevOps administrator in Azure AD has enabled a policy which limits you to a specific custom defined set of scopes.

    6. Now click Copy button and save the newly created token into a file for quick access later: Use Azure DevOps token to read REST API data
    7. Go back to the connector screen, input the token you saved in a previous step into the Personal Access Token (PAT) field.
    8. Then enter the Organization host name part that you noted recorded in previous step into Organization name or Id for url field.
    9. Enter the name or Id of the project you want to connect to by default in the Default Project (Choose after above fields) field.
    10. Select the Security tab.
    11. Enter https://auditservice.dev.azure.com,https://almsearch.dev.azure.com,https://analytics.dev.azure.com into the Additional Trusted Domains field.
    12. Select the Test Connection button at the bottom of the window to verify proper connectivity with your Azure DevOps account.
    13. Done!

    Fill in all required parameters and set optional parameters if needed:

    AzureDevopsDSN
    Azure DevOps
    Personal Access Token (PAT) [Http]
    https://dev.azure.com
    Required Parameters
    Personal Access Token (PAT) Fill-in the parameter...
    Organization name or Id for url Fill-in the parameter...
    API Version Fill-in the parameter...
    Optional Parameters
    AuthScheme Bearer
    AuthHeader Authorization
    UserName
    Default Project Name (Choose after Generating Token)
    RetryMode RetryWhenStatusCodeMatch
    RetryStatusCodeList 429
    RetryCountMax 5
    RetryMultiplyWaitTime True
    ODBC DSN HTTP Connection Configuration

  7. Once the data source connection has been configured, it's time to configure the SQL query. Select the Preview tab and then click Query Builder button to configure the SQL query:

    ZappySys API Driver - Azure DevOps
    Azure DevOps Connector can be used to integrate Azure DevOps data in your App / BI Tools. You can create, read, query, modify, and delete WorkItems, Projects, Teams and more.
    AzureDevopsDSN
    Open Query Builder in API ODBC Driver to read and write data to REST API
  8. Start by selecting the Table or Endpoint you are interested in and then configure the parameters. This will generate a query that we will use in SQL Server to retrieve data from Azure DevOps. Hit OK button to use this query in the next step.

    SELECT * FROM Projects
    Configure table/endpoint parameters in ODBC data source based on API Driver
    Some parameters configured in this window will be passed to the Azure DevOps API, e.g. filtering parameters. It means that filtering will be done on the server side (instead of the client side), enabling you to get only the meaningful data much faster.
  9. Now hit Preview Data button to preview the data using the generated SQL query. If you are satisfied with the result, use this query in SQL Server:

    ZappySys API Driver - Azure DevOps
    Azure DevOps Connector can be used to integrate Azure DevOps data in your App / BI Tools. You can create, read, query, modify, and delete WorkItems, Projects, Teams and more.
    AzureDevopsDSN
    SELECT * FROM Projects
    API ODBC Driver-based data source data preview
    You can also access data quickly from the tables dropdown by selecting <Select table>.
    A WHERE clause, LIMIT keyword will be performed on the client side, meaning that the whole result set will be retrieved from the Azure DevOps API first, and only then the filtering will be applied to the data. If possible, it is recommended to use parameters in Query Builder to filter the data on the server side (in Azure DevOps servers).
  10. Click OK to finish creating the data source.

Read data in SQL Server using ZappySys Data Gateway

To read the data in SQL Server, the first thing you have to do is create a Linked Server:

  1. First, let's open SQL Server Management Studio, create a new Linked Server, and start configuring it:

    LS_TO_AZURE_DEVOPS_IN_GATEWAY
    Microsoft OLE DB Driver for SQL Server
    localhost,5000
    AzureDevopsDSN
    AzureDevopsDSN
    SSMS SQL Server Configure Linked Server
    Choose SQL Server Native Client 11.0 as Provider if you don't see the option shown above.
  2. Then click on Security option and configure username we created in ZappySys Data Gateway in one of the previous steps:

    SSMS SQL Server Configure Linked Server User Name
  3. Optional step. Under the Server Options, Enable RPC and RPC Out and Disable Promotion of Distributed Transactions(MSDTC).

    RPC and MSDTC Settings

    You need to enable RPC Out if you plan to use EXEC(...) AT [LS_TO_AZURE_DEVOPS_IN_GATEWAY] rather than OPENQUERY.
    If don't enabled it, you will encounter the Server 'LS_TO_AZURE_DEVOPS_IN_GATEWAY' is not configured for RPC error.

    Query Example:

    EXEC('SELECT * FROM Projects') AT [LS_TO_AZURE_DEVOPS_IN_GATEWAY]


    If you plan to use 'INSERT INTO <TABLE> EXEC(...) AT [LS_TO_AZURE_DEVOPS_IN_GATEWAY]' in that case you need to Disable Promotion of Distributed Transactions(MSDTC).
    If don't disabled it, you will encounter the The operation could not be performed because OLE DB provider "SQLNCLI11" for linked server "MY_LINKED_SERVER_NAME" was unable to begin a distributed transaction. error.

    Query Example:

    INSERT INTO dbo.Products
    EXEC('SELECT * FROM Projects') AT [LS_TO_AZURE_DEVOPS_IN_GATEWAY]
    

  4. Finally, open a new query and execute a query we saved in one of the previous steps:

    SELECT * FROM OPENQUERY([LS_TO_AZURE_DEVOPS_IN_GATEWAY], 'SELECT * FROM Projects')
    Execute query at Linked Server to ZappySys Data Gateway in SSMS

    SELECT * FROM OPENQUERY([LS_TO_AZURE_DEVOPS_IN_GATEWAY], 'SELECT * FROM Projects')

Create Linked Server using Code

In previous section you saw how to create a Linked Server from UI. You can do similar action by code too (see below). Run below script after changing necessary parameters. Assuming your Data Source name on ZappySys Data Gateway UI is 'AzureDevopsDSN'
USE [master]
GO
--///////////////////////////////////////////////////////////////////////////////////////
--Run below code in SSMS to create Linked Server and use ZappySys Drivers in SQL Server
--///////////////////////////////////////////////////////////////////////////////////////

-- Replace YOUR_GATEWAY_USER, YOUR_GATEWAY_PASSWORD
-- Replace localhost with IP/Machine name if ZappySys Gateway Running on different machine other than SQL Server
-- Replace Port 5000 if you configured gateway on a different port


--1. Configure your gateway service as per this article https://zappysys.com/links?id=10036

--2. Make sure you have SQL Server Installed. You can download FREE SQL Server Express Edition from here if you dont want to buy Paid version https://www.microsoft.com/en-us/sql-server/sql-server-editions-express

--Uncomment below if you like to drop linked server if it already exists
--EXEC master.dbo.sp_dropserver @server=N'LS_TO_AZURE_DEVOPS_IN_GATEWAY', @droplogins='droplogins'

--3. Create new linked server

EXEC master.dbo.sp_addlinkedserver
    @server = N'LS_TO_AZURE_DEVOPS_IN_GATEWAY'  --Linked server name (this will be used in OPENQUERY sql
, @srvproduct=N''
---- For MSSQL 2012,2014,2016 and 2019 use below (SQL Server Native Client 11.0)---
, @provider=N'SQLNCLI11'
---- For MSSQL 2022 or higher use below (Microsoft OLE DB Driver for SQL Server)---
--, @provider=N'MSOLEDBSQL'
, @datasrc=N'localhost,5000' --//Machine / Port where Gateway service is running
, @provstr=N'Network Library=DBMSSOCN;'
, @catalog=N'AzureDevopsDSN' --Data source name you gave on Gateway service settings

--4. Attach gateway login with linked server

EXEC master.dbo.sp_addlinkedsrvlogin
@rmtsrvname=N'LS_TO_AZURE_DEVOPS_IN_GATEWAY'  --linked server name
, @useself=N'False'
, @locallogin=NULL
, @rmtuser=N'YOUR_GATEWAY_USER' --enter your Gateway user name
, @rmtpassword='YOUR_GATEWAY_PASSWORD'  --enter your Gateway user's password
GO

--5. Enable RPC OUT (This is Optional - Only needed if you plan to use EXEC(...) AT YourLinkedServerName rather than OPENQUERY
EXEC sp_serveroption 'LS_TO_AZURE_DEVOPS_IN_GATEWAY', 'rpc', true;
EXEC sp_serveroption 'LS_TO_AZURE_DEVOPS_IN_GATEWAY', 'rpc out', true;

--Disable MSDTC - Below needed to support INSERT INTO from EXEC AT statement
EXEC sp_serveroption 'LS_TO_AZURE_DEVOPS_IN_GATEWAY', 'remote proc transaction promotion', false;

--Increase query timeout if query is going to take longer than 10 mins (Default timeout is 600 seconds)
--EXEC sp_serveroption 'LS_TO_AZURE_DEVOPS_IN_GATEWAY', 'query timeout', 1200;
GO

Firewall settings

So far we have assumed that Gateway is running on the same machine as SQL Server. However there will be a case when ZappySys ODBC PowerPack is installed on a different machine than SQL Server. In such case you may have to perform additional Firewall configurations. On most computers firewall settings wont allow outside traffic to ZappySys Data Gateway. In such case perform following steps to allow other machines to connect to Gateway.

Method-1 (Preferred)

If you are using newer version of ZappySys Data Gateway then adding firewall rule is just a single click.

  1. Search for gateway in start menu and open ZappySys Data Gateway.
  2. Go to Firewall Tab and click Add Firewall Rule button like below. This will create Firewall rule to all Inbound Traffic on Port 5000 (Unless you changed it). Allow Inbound Traffic - Add Firewall Rule for ZappySys Data Gateway

Method-2 Here is another way to add / edit Inbound Traffic rule in windows firewall. Use below method if you choose to customize your rule (for advanced users).
  1. Search for Windows Firewall Advanced Security in start menu.
  2. Under Inbound Rules > Right click and click [New Rule] >> Click Next
  3. Select Port on Rule Type >> Click Next
  4. Click on TCP and enter port number under specified local port as 5000 (use different one if you changed Default port) >> Click Next
  5. Select Profile (i.e. Private, Public) >> Click Next
  6. Enter Rule name [i.e. ZappySys Data Gateway – Allow Inbound ] >> Click Next
  7. Click OK to save the rule
SQL Server Firewall Allow Inbound Data Gateway

OPENQUERY vs EXEC (handling larger SQL text)

So far we have seen examples of using OPENQUERY. It allows us to send pass-through query at remote server. The biggest limitation of OPENQUERY is it doesn't allow you to use variables inside SQL so often we have to use unpleasant looking dynamic SQL (Lots of tick, tick …. and escape hell). Well there is good news. With SQL 2005 and later you can use EXEC(your_sql) AT your_linked_server syntax . Disadvantage of EXEC AT is you cannot do SELECT INTO like OPENQUERY. Also you cannot perform JOIN like below in EXEC AT

SELECT a.*
FROM OPENQUERY([LS_TO_AZURE_DEVOPS_IN_GATEWAY],'SELECT * FROM Customers') AS A
JOIN OPENQUERY([LS_TO_AZURE_DEVOPS_IN_GATEWAY],'SELECT * FROM Orders') AS B 
    ON A.CustomerId = B.CustomerId;
However you can always do INSERT INTO SomeTable EXEC(…) AT your_linked_server. So table must exists when you do that way. Here is how to use it. To use EXEC(..) AT {linked-server} you must turn on RPC OUT option. Notice how we used variable in SQL to make it dynamic. This is much cleaner than previous approach we saw.
USE [master]
GO
--Replace YOUR_GATEWAY_USER, YOUR_GATEWAY_PASSWORD
--Replace localhost with IP/Machine name if ZappySys Gateway Running on different machine other than SQL Server

--Create new linked server
EXEC master.dbo.sp_addlinkedserver
@server = N'LS_TO_AZURE_DEVOPS_IN_GATEWAY'  --Linked server name (this will be used in OPENQUERY sql)
, @srvproduct=N''
---- For MSSQL 2012,2014,2016 and 2019 use below (SQL Server Native Client 11.0)---
, @provider=N'SQLNCLI11'
---- For MSSQL 2022 or higher use below (Microsoft OLE DB Driver for SQL Server)---
--, @provider=N'MSOLEDBSQL'
, @datasrc=N'localhost,5000' --//Machine / Port where Gateway service is running
, @provstr=N'Network Library=DBMSSOCN;'
, @catalog=N'AzureDevopsDSN' --Data source name you gave on Gateway service settings

--Attach gateway login with linked server
EXEC master.dbo.sp_addlinkedsrvlogin
@rmtsrvname=N'LS_TO_AZURE_DEVOPS_IN_GATEWAY'  --linked server name
, @useself=N'False'
, @locallogin=NULL
, @rmtuser=N'YOUR_GATEWAY_USER' --enter your Gateway user name
, @rmtpassword='YOUR_GATEWAY_PASSWORD'  --enter your Gateway user's password
GO

--5. Enable RPC OUT (This is Optional - Only needed if you plan to use EXEC(...) AT YourLinkedServerName rather than OPENQUERY
EXEC sp_serveroption 'LS_TO_AZURE_DEVOPS_IN_GATEWAY', 'rpc', true;
EXEC sp_serveroption 'LS_TO_AZURE_DEVOPS_IN_GATEWAY', 'rpc out', true;
--Disable MSDTC - Below needed to support INSERT INTO from EXEC AT statement
EXEC sp_serveroption 'LS_TO_AZURE_DEVOPS_IN_GATEWAY', 'remote proc transaction promotion', false;
--Increase query timeout if query is going to take longer than 10 mins (Default timeout is 600 seconds)
--EXEC sp_serveroption 'LS_TO_AZURE_DEVOPS_IN_GATEWAY', 'query timeout', 1200;
GO

Here is the difference between OPENQUERY vs EXEC approaches: OPENQUERY vs EXEC

Fetching Tables / Columns using metadata stored procs

ZappySys Data Gateway emulates certains system procs you might find in real SQL Server. You can call using below syntax using 4-Parts syntax
EXEC [LS_TO_AZURE_DEVOPS_IN_GATEWAY].[AzureDevopsDSN].[DATA].sp_tables
EXEC [LS_TO_AZURE_DEVOPS_IN_GATEWAY].[AzureDevopsDSN].[DATA].sp_columns_90 N'your-table-name'
Example:
-- List all tables
EXEC [LS_TO_AZURE_DEVOPS_IN_GATEWAY].[AzureDevopsDSN].[DATA].sp_tables

-- List all columns and its type for specified table
EXEC [LS_TO_AZURE_DEVOPS_IN_GATEWAY].[AzureDevopsDSN].[DATA].sp_columns_90 N'Account'

Known Issues

Let's explore some common problems that can occur when using OPENQUERY or Data Gateway connectivity.


SQL Native Client 11.0 not visible in the Providers dropdown (Linked Server Creation)

If you are following some screenshots / steps from our article it might say use SQL Native Client to create Linked Server to ZappySys Gateway but for some users they dont see that driver entry in the dropdown. This is due to the fact that Microsoft has deprecated SQL Native Client OLEDB Driver (SQLNCLI and SQLNCLI11) going forward after SQL 2022. So you need to use [Microsoft OLE DB Driver for SQL Server] instead (MSOLEDBSQL). Please follow all other instructions except the driver type selection, use new suggested driver instead if you dont see SQL Native Client.

Error: The data is invalid

There will be a time when, you may encounter unexpected errors like the ones listed below. These can include:

OLE DB provider "SQLNCLI11" for linked server "Zs_Csv" returned message "Deferred prepare could not be completed.".
OLE DB provider "SQLNCLI11" for linked server "Zs_Csv" returned message "Communication link failure".
Msg 13, Level 16, State 1, Line 0

Session Provider: The data is invalid.
Possible Cause:

There are few reasons for such error but below are two main reasons

  • If the query length exceeds 2000 characters, as shown below, you might encounter this error.

    SELECT * FROM OPENQUERY(LS, '--some really long text more than 2000 chars--')
  • If a query contains multiple OPENQUERY statements for JOINs or UNIONs, as shown below, it might fail due to a MARS compatibility issue where the gateway doesn't support parallel queries on a single connection.

    SELECT a.id, b.name from OPENQUERY(LS, 'select * from tbl1') a join OPENQUERY(LS, 'select * from tbl2') b on a.id=b.id
Possible Fix:

There are few ways to fix above error based on reason why you getting this error (i.e. Query Length issue OR JOIN/UNION in the same statement)

  • If your query has long SQL (more than 2000 chars ) then reduce SQL length using different techniques
    • e.g. use SELECT * FROM MyTable rather than SELECT col1,col2… FROM MyTable
    • Use Meta Option in WITH clause if you must use column name. (e.g. SELECT * FROM MyTable WITH(META=’c:\meta.txt’) this way you can define column in Meta file rather than SELECT query. Check this article
    • Consider using EXECT (….) AT [Linked_Server_name] option rather than OPENQUERY so you can use very long SQL (See next section on EXEC..AT usecase)
    • Consider using Virtual Table / Stored Proc to wrap long SQL so your call is very small (where usp_GetOrdersByYear is custom proc created on ZappySys Driver UI)
      SELECT * FROM OPENQUERY(LS, 'EXEC usp_GetOrdersByYear 2021')
  • If your query uses JOIN  / UNION with multiple OPENQUERY in same SQL then use multiple Linked servers (one for each OPENQUERY clause) as below.
    select a.id, b.name from OPENQUERY(LS_1, 'select * from tbl1') a join OPENQUERY(LS_2, 'select * from tbl2') b on a.id=b.id

Error: Unable to begin a distributed transaction (When INSERT + EXEC used)

If you try to use the EXEC statement to insert data into a table, as shown below, you might encounter the following error unless the MSDTC option is turned off.

INSERT INTO MyTable EXEC('select * from tbl') AT MyLinkedServer
"Protocol error in TDS stream"
The operation could not be performed because OLE DB provider "SQLNCLI11" for linked server "ls_Json2" was unable to begin a distributed transaction.
--OR--
The operation could not be performed because OLE DB provider "MSOLEDBSQL" for linked server "ls_Json" was unable to begin a distributed transaction.

Solution:
Method-1: Go to linked server properties | Server Options | Enable Promotion of Distributed Transaction | Change to false (Default is true)
Now your try your INSERT with EXEC AT and it should work

Method-2: Run the below command if you dont want to use UI

EXEC master.dbo.sp_serveroption @server=N'My_Linked_Server', @optname=N'remote proc transaction promotion', @optvalue=N'false'

Error: Cannot use OPENQUERY with JOIN / UNION

When you perform a JOIN or UNION ALL on the same Linked Server, it may fail to process sometimes because the Data Gateway doesn't support parallel query requests on the same connection. A workaround for that would be to create multiple linked servers for the same data source. Refer to the section above for the same workaround.


Error: Truncation errors due to data length mismatch

Many times, you may encounter truncation errors if a table column's length is less than the actual column size from the query column. To solve this issue, use the new version of Data Gateway and check the 'Use nvarchar(max) for string options' option found on the General Tab.


Performance Tips

Now, let's look at a few performance tips in this section.


Use INSERT INTO rather than SELECT INTO to avoid extra META request

We discussed some Pros and Cons of OPENQUERY vs EXEC (…) AT in previous section. One obvious advantage of EXEC (….) AT is it reduces number of requests to driver (It sends pass through query). With EXEC you cannot load data dynamically like SELECT INTO tmp FROM OPENQUERY. Table must exist before hand if you use EXEC.

INSERT INTO tmp_API_Report_Load(col1,col2)
EXEC('select col1,col2 from some_api_table') AT [API-LINKED-SERVER]
--OR--
INSERT INTO tmp_API_Report_Load(col1,col2)
select col1,col2 from OPENQUERY([API-LINKED-SERVER], 'select col1,col2 from some_api_table')

The advantage of this method is that your query speed will increase because the system only calls the API once when you use EXEC AT. In contrast, with OPENROWSET, the query needs to be called twice: once to obtain metadata and once to retrieve the data.


Use Cached Metadata if possible

By default, most SQL queries sent to the Data Gateway need to invoke two phases: first, to get metadata, and second, to fetch data. However, you can bypass the metadata API call by supplying static metadata. Use the META property in the WITH clause, as explained in this article , to speed up your SQL queries.

Actions supported by Azure DevOps Connector

Learn how to perform common Azure DevOps actions directly in SQL Server with these how-to guides:

Conclusion

In this article we showed you how to connect to Azure DevOps in SQL Server and integrate data without any coding, saving you time and effort. It's worth noting that ZappySys API Driver allows you to connect not only to Azure DevOps, but to any Java application that supports JDBC (just use a different JDBC driver and configure it appropriately).

We encourage you to download Azure DevOps Connector for SQL Server and see how easy it is to use it for yourself or your team.

If you have any questions, feel free to contact ZappySys support team. You can also open a live chat immediately by clicking on the chat icon below.

Download Azure DevOps Connector for SQL Server Documentation

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