PowerShell Scripting to Replicate Parquet Data to MySQL

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Parquet Data Cmdlets

An easy-to-use set of PowerShell Cmdlets offering real-time access to Parquet. The Cmdlets allow users to easily read, write, update, and delete live data - just like working with SQL server.

Write a simple PowerShell script to replicate Parquet data to a MySQL database.

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

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

Connect to your local Parquet file(s) by setting the URI connection property to the location of the Parquet file.

Collecting Parquet Data

  1. Install the module:

    Install-Module ParquetCmdlets
  2. Connect to Parquet:

    $parquet = Connect-Parquet -URI $URI
  3. Retrieve the data from a specific resource:

    $data = Select-Parquet -Connection $parquet -Table "SampleTable_1"

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

    $data = Invoke-Parquet -Connection $parquet -Query 'SELECT * FROM SampleTable_1 WHERE Column2 = @Column2' -Params @{'@Column2'='SAMPLE_VALUE'}
  4. Save a list of the column names from the returned data.

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

Inserting Parquet 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 Parquet 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 Parquet resource (SampleTable_1) and to exist in the database.

    $data | % { $row = $_ $values = @() $columns | % { $col = $_ $values += $row.$($col) } Add-MySQL -Connection $mysql -Table "SampleTable_1" -Columns $columns -Values $values }

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


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

    Select-Parquet -Connection $parquet -Table "SampleTable_1" | % { $row = $_ $values = @() $columns | % { $col = $_ $values += $row.$($col) } Add-MySQL -Connection $mysql -Table "SampleTable_1" -Columns $columns -Values $values }
  • If you wish to replicate the Parquet 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-Parquet 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')}