How to pipe Google Spanner Data to CSV in PowerShell

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

Creating a Connection to Your Google Spanner Data

Google Spanner uses the OAuth authentication standard. To authenticate using OAuth, you can use the embedded credentials or register an app with Google.

See the Getting Started guide in the CData driver documentation for more information.

$conn = Connect-GoogleSpanner -ProjectId "$ProjectId" -InstanceId "$InstanceId" -Database "$Database" -InitiateOAuth "$InitiateOAuth"

Selecting Data

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

Select-GoogleSpanner -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-GoogleSpanner 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.

The Connection, Table, and Columns are appended to the results in order to facilitate piping results from one of the CData Cmdlets directly into another one.

Deleting Data

The following line deletes any records that match the criteria:

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

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 Google Spanner, checking first whether a record already exists and needs to be updated instead of inserted.

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