Pipe MarkLogic Data to CSV in PowerShell

The CData Cmdlets Module for MarkLogic is a standard PowerShell module offering straightforward integration with MarkLogic. Below, you will find examples of using our MarkLogic Cmdlets with native PowerShell cmdlets.

Creating a Connection to Your MarkLogic Data

Set User, Password, and Server to the credentials for the MarkLogic account and the address of the server you want to connect to. You should also specify the REST API Port if you want to use a specific instance of a REST Server.

$conn = Connect-MarkLogic  -User "$User" -Password "$Password" -Server "$Server"

Selecting Data

Follow the steps below to retrieve data from the Customer table and pipe the result into to a CSV file:

Select-MarkLogic -Connection $conn -Table Customer | Select -Property * -ExcludeProperty Connection,Table,Columns | Export-Csv -Path c:\myCustomerData.csv -NoTypeInformation

You will notice that we piped the results from Select-MarkLogic into a Select-Object cmdlet and excluded some properties before piping them into an Export-Csv cmdlet. We do this because the CData Cmdlets append Connection, Table, and Columns information onto each "row" in the result set, and we do not necessarily want that information in our CSV file.

Deleting Data

The following line deletes any records that match the criteria:

Select-MarkLogic -Connection $conn -Table Customer -Where "Id = 1" | Remove-MarkLogic

Inserting and Updating Data

The cmdlets make data transformation easy as well as data cleansing. The following example loads data from a CSV file into MarkLogic, checking first whether a record already exists and needs to be updated instead of inserted.

Import-Csv -Path C:\MyCustomerUpdates.csv | %{
  $record = Select-MarkLogic -Connection $MarkLogic -Table Customer -Where ("Id = `'"+$_.Id+"`'")
  if($record){
    Update-MarkLogic -Connection $marklogic -Table Customer -Columns ("Name","TotalDue") -Values ($_.Name, $_.TotalDue) -Where ("Id = `'"+$_.Id+"`'")
  }else{
    Add-MarkLogic -Connection $marklogic -Table Customer -Columns ("Name","TotalDue") -Values ($_.Name, $_.TotalDue)
  }
}

As always, our goal is to simplify the way you connect to data. With cmdlets users can install a data module, set the connection properties, and start building. Download Cmdlets and start working with your data in PowerShell today!