PowerShell and MySQL - Leave connection open for multiple queries? - mysql

Question

I am using the MySQL connector with PowerShell and I have the need to do a query, then scrub the data a little bit and then dump the remainder to another table on the same MySQL DB. How could I leave the connection open to make this all run a bit faster?
[void][System.Reflection.Assembly]::LoadWithPartialName("MySql.Data")
$Connection = New-Object MySql.Data.MySqlClient.MySqlConnection
$Connection.ConnectionString = $ConnectionString
$Connection.Open()
$Command = New-Object MySql.Data.MySqlClient.MySqlCommand($Query, $Connection)
$DataAdapter = New-Object MySql.Data.MySqlClient.MySqlDataAdapter($Command)
$DataSet = New-Object System.Data.DataSet
$RecordCount = $dataAdapter.Fill($dataSet, "data")
return $DataSet.Tables[0]

Answer 1

Create the connection object in the function that calls this function. The called function will inherit whatever objects the calling function is maintaining, so $Connection will be valid in the called function.
function RunMe(){
[void][System.Reflection.Assembly]::LoadWithPartialName("MySql.Data")
$Connection = New-Object MySql.Data.MySqlClient.MySqlConnection
$Connection.ConnectionString = $ConnectionString
$Connection.Open()
# Call the function that executes the MySQL code
ExecuteMySQL
# If needed, call another function that executes the MySQL code
ExecuteSomeOtherMySQL
# Close the connection after all MySQL operations are complete
$Connection.Close()
}
function ExecuteMySQL(){
$Command = New-Object MySql.Data.MySqlClient.MySqlCommand($Query, $Connection)
$DataAdapter = New-Object MySql.Data.MySqlClient.MySqlDataAdapter($Command)
$DataSet = New-Object System.Data.DataSet
$RecordCount = $dataAdapter.Fill($dataSet, "data")
return $DataSet.Tables[0]
}