PowerShell Scripting to Replicate Sybase Data to MySQL

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

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

To connect to Sybase, specify the following connection properties:

• Server: Set this to the name or network address of the Sybase database instance.
• Database: Set this to the name of the Sybase database running on the specified Server.

Optionally, you can also secure your connections with TLS/SSL by setting UseSSL to true.

Sybase supports several methods for authentication including Password and Kerberos.

Connect Using Password Authentication

Set the AuthScheme to Password and set the following connection properties to use Sybase authentication.

• User: Set this to the username of the authenticating Sybase user.
• Password: Set this to the username of the authenticating Sybase user.

Connect using LDAP Authentication

To connect with LDAP authentication, you will need to configure Sybase server-side to use the LDAP authentication mechanism.

After configuring Sybase for LDAP, you can connect using the same credentials as Password authentication.

Connect Using Kerberos Authentication

To leverage Kerberos authentication, begin by enabling it setting AuthScheme to Kerberos. See the Using Kerberos section in the Help documentation for more information on using Kerberos authentication.

You can find an example connection string below: Server=MyServer;Port=MyPort;User=SampleUser;Password=SamplePassword;Database=MyDB;Kerberos=true;KerberosKDC=MyKDC;KerberosRealm=MYREALM.COM;KerberosSPN=server-name

Collecting Sybase Data

1. Install the module:

   Install-Module SybaseCmdlets

2. Connect to Sybase:

   $sybase = Connect-Sybase -User $User -Password $Password -Server $Server -Database $Database -Charset $Charset

3. Retrieve the data from a specific resource:

   $data = Select-Sybase -Connection $sybase -Table "Products"

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

   $data = Invoke-Sybase -Connection $sybase -Query 'SELECT * FROM Products WHERE ProductName = @ProductName' -Params @{'@ProductName'='Konbu'}

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

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

Inserting Sybase 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 Sybase 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 Sybase resource (Products) and to exist in the database.

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

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

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

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