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Replicate Google Spanner Data from PowerShell
Write a quick PowerShell script to query Google Spanner data. Use connectivity to the live data to replicate Google Spanner data to SQL Server.
The CData ODBC Driver for Google Spanner enables out-of-the-box integration with Microsoft's built-in support for ODBC. The ODBC driver instantly integrates connectivity to the real Google Spanner data with PowerShell.
You can use the .NET Framework Provider for ODBC built into PowerShell to quickly automate integration tasks like replicating Google Spanner data to other databases. This article shows how to replicate Google Spanner data to SQL Server in 5 lines of code.
You can also write PowerShell code to execute create, read, update, and delete (CRUD) operations. See the examples below.
Create an ODBC Data Source for Google Spanner
If you have not already, first specify connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.
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.
Connect to Google Spanner
The code below shows how to use the DSN to initialize the connection to Google Spanner data in PowerShell:
$conn = New-Object System.Data.Odbc.OdbcConnection
$conn.ConnectionString = "DSN=CData GoogleSpanner Source x64"
Back Up Google Spanner 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 " + $Customer
$cmd = New-Object System.Data.Odbc.OdbcCommand($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 Google Spanner 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 CRUD commands to Google Spanner through the .NET Framework Provider for ODBC:
Retrieve Google Spanner Data
$sql="SELECT Name, TotalDue from Customer"
$da= New-Object System.Data.Odbc.OdbcDataAdapter($sql, $conn)
$dt= New-Object System.Data.DataTable
$da.Fill($dt)
$dt.Rows | foreach {
$dt.Columns | foreach ($col in dt{
Write-Host $1[$_]
}
}
Update Google Spanner Data
$cmd = New-Object System.Data.Odbc.OdbcCommand("UPDATE Customer SET Id='1' WHERE Id = @myId", $conn)
$cmd.Parameters.Add(new System.Data.Odbc.OdbcParameter("myId","001d000000YBRseAAH")
$cmd.ExecuteNonQuery()
Insert Google Spanner Data
$cmd = New-Object System.Data.Odbc.OdbcCommand("INSERT INTO Customer SET Id='1' WHERE Id = @myId", $conn)
$cmd.Parameters.Add(new System.Data.Odbc.OdbcParameter("myId","001d000000YBRseAAH")
$cmd.ExecuteNonQuery()
Delete Google Spanner Data
$cmd = New-Object System.Data.Odbc.OdbcCommand("DELETE FROM Customer WHERE Id = @myid", $conn)
$cmd.Parameters.Add(new System.Data.Odbc.OdbcParameter("myId","001d000000YBRseAAH")
$cmd.ExecuteNonQuery()
Ready to get started?
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Google Spanner ODBC Driver
The Google Cloud Spanner ODBC Driver is a powerful tool that allows you to connect with live Spanner Cloud databases, directly from any applications that support ODBC connectivity.
Access Google Cloud Spanner like you would any other RDBMS - read, write, and update through a standard ODBC Driver interface.
