PowerShell Scripting to Replicate xBase Data to MySQL

The CData Cmdlets for xBase offer live access to xBase 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 xBase and the CData Cmdlets for MySQL in PowerShell to replicate xBase data to a MySQL database.

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

The DataSource property must be set to the name of the folder that contains the .dbf files. Specify the IncludeFiles property to work with xBase table files having extensions that differ from .dbf. Specify multiple extensions in a comma-separated list.

Collecting xBase Data

1. Install the module:

   Install-Module xBaseCmdlets

2. Connect to xBase:

   $xbase = Connect-xBase -DataSource $DataSource

3. Retrieve the data from a specific resource:

   $data = Select-xBase -Connection $xbase -Table "Invoices"

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

   $data = Invoke-xBase -Connection $xbase -Query 'SELECT * FROM Invoices WHERE Class = @Class' -Params @{'@Class'='ASSET'}

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

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

Inserting xBase 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 xBase 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 xBase resource (Invoices) and to exist in the database.

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

You have now replicated your xBase data to a MySQL database. This gives you freedom to work with xBase 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 xBase and MySQL in PowerShell, you can pipe command results to perform the replication in a single line:

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

• If you wish to replicate the xBase 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-xBase 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')}