PowerShell Scripting to Replicate MariaDB Data to MySQL

The CData Cmdlets for MariaDB offer live access to MariaDB data from within PowerShell. Using PowerShell scripts, you can easily automate regular tasks like data replication. This article will walk through using the CData Cmdlets for MariaDB and the CData Cmdlets for MySQL in PowerShell to replicate MariaDB data to a MySQL database.

After obtaining the needed connection properties, accessing MariaDB data in PowerShell and preparing for replication consists of four basic steps.

The Server and Port properties must be set to a MariaDB server. If IntegratedSecurity is set to false, then User and Password must be set to valid user credentials. Optionally, Database can be set to connect to a specific database. If not set, the tables from all databases are reported.

Collecting MariaDB Data

1. Install the module:

   Install-Module MariaDBCmdlets

2. Connect to MariaDB:

   $mariadb = Connect-MariaDB -User $User -Password $Password -Database $Database -Server $Server -Port $Port

3. Retrieve the data from a specific resource:

   $data = Select-MariaDB -Connection $mariadb -Table "Orders"

   You can also use the Invoke-MariaDB cmdlet to execute pure SQL-92 statements:

   $data = Invoke-MariaDB -Connection $mariadb -Query 'SELECT * FROM Orders WHERE ShipCountry = @ShipCountry' -Params @{'@ShipCountry'='USA'}

4. Save a list of the column names from the returned data.

   $columns = ($data | Get-Member -MemberType NoteProperty | Select-Object -Property Name).Name

Inserting MariaDB Data into the MySQL Database

With the data and column names collected, you are ready to replicate the data into a MySQL database.

1. Install the module:

   Install-Module MySQLCmdlets

2. Connect to MySQL, using the server address and port of the MySQL server, valid user credentials, and a specific database with the table in which the data will be replicated:

   $mysql = Connect-MySQL -User $User -Password $Password -Database $Database -Server $Server -Port $Port

3. Loop through the MariaDB data, store the values, and use the Add-MySQL cmdlet to insert the data into the MySQL database, one row at a time. In this example, the table will need to have the same name as the MariaDB resource (Orders) and to exist in the database.

   $data | % { $row = $_ $values = @() $columns | % { $col = $_ $values += $row.$($col) } Add-MySQL -Connection $mysql -Table "Orders" -Columns $columns -Values $values }

You have now replicated your MariaDB data to a MySQL database. This gives you freedom to work with MariaDB data in the same way that you work with other MySQL tables, whether that is performing analytics, building reports, or other business functions.

Notes

• Once you have connected to MariaDB and MySQL in PowerShell, you can pipe command results to perform the replication in a single line:

  Select-MariaDB -Connection $mariadb -Table "Orders" | % { $row = $_ $values = @() $columns | % { $col = $_ $values += $row.$($col) } Add-MySQL -Connection $mysql -Table "Orders" -Columns $columns -Values $values }

• If you wish to replicate the MariaDB data to another database using another PowerShell module, you will want to exclude the Columns, Connection, and Table columns from the data returned by the Select-MariaDB cmdlet since those columns are used to help pipe data from one CData cmdlet to another:

  $columns = ($data | Get-Member -MemberType NoteProperty | Select-Object -Property Name).Name | ? {$_ -NotIn @('Columns','Connection','Table')}