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Replicate HPCC Systems Data from PowerShell

Write a quick PowerShell script to query HPCC Systems data. Use connectivity to the live data to replicate HPCC Systems data to SQL Server.



The CData ODBC Driver for HPCC Systems enables out-of-the-box integration with Microsoft's built-in support for ODBC. The ODBC driver instantly integrates connectivity to the real HPCC Systems data with PowerShell.

You can use the .NET Framework Provider for ODBC built into PowerShell to quickly automate integration tasks like replicating HPCC Systems data to other databases. This article shows how to replicate HPCC Systems data to SQL Server in 5 lines of code.

You can also write PowerShell code to download HPCC Systems data. See the examples below.

Create a DSN

If you have not already done so, specify connection properties defined in the data source name (DSN).

Below is a typical connection string:

URL=http://127.0.0.1:8510;User=test;password=xA123456;Version=1;Cluster=hthor;

You can configure the DSN in the built-in Microsoft ODBC Data Source Administrator. This is the last step of the driver installation. See the "Getting Started" chapter in the help documentation for a guide to use the Microsoft ODBC Data Source Administrator to create and configure a DSN.

Connect to HPCC Systems

The code below shows how to use the DSN to initialize the connection to HPCC Systems data in PowerShell:

$conn = New-Object System.Data.Odbc.OdbcConnection $conn.ConnectionString = "DSN=CData HPCC Source x64"

Back Up HPCC Systems Data to SQL Server

After you enable caching, you can use the code below to replicate data to SQL Server.

Set the following connection properties to configure the caching database:

  • CacheProvider: The name of the ADO.NET provider. This can be found in the Machine.config for your version of .NET. For example, to configure SQL Server, enter System.Data.SqlClient.

  • CacheConnection: The connection string of properties required to connect to the database. Below is an example for SQL Server:

    Server=localhost;Database=RSB;User Id=sqltest;Password=sqltest;

The SQL query in the example can be used to refresh the entire cached table, including its schema. Any already existing cache is deleted.

$conn.Open() # Create and execute the SQL Query $SQL = "CACHE DROP EXISTING SELECT * FROM " + $hpcc::test::orders $cmd = New-Object System.Data.Odbc.OdbcCommand($sql,$conn) $count = $cmd.ExecuteNonQuery() $conn.Close()

The driver gives you complete control over the caching functionality. See the help documentation for more caching commands and usage examples. See the help documentation for steps to replicate to other databases.

Other Operations

To retrieve HPCC Systems data in PowerShell, call the Fill method of the OdbcDataAdapter method. To execute data manipulation commands, initialize the OdbcCommand object and then call ExecuteNonQuery. Below are some more examples commands to HPCC Systems through the .NET Framework Provider for ODBC:

Retrieve HPCC Systems Data

$sql="SELECT CustomerName, Price from hpcc::test::orders" $da= New-Object System.Data.Odbc.OdbcDataAdapter($sql, $conn) $dt= New-Object System.Data.DataTable $da.Fill($dt) $dt.Rows | foreach { $dt.Columns | foreach ($col in dt{ Write-Host $1[$_] } }
 
 
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