Powershell Job Step in SQL Error - sql-server

Question

I'm new to PowerShell and still early in SQL Server, but I'm trying to write a PowerShell step for a SQL Agent job that looks at a CSV file that contains names of .sql files.
It should then look at a different directory and if the names from the CSV file exist in that directory it should open the .sql file and execute the function inside.
I'm getting an error:
Unable to cast object of type 'System.String to type System.Type
Any help would be greatly appreciated.
$excelFile = "C:/ExcelTest/Test.csv"
$functionDirectory = "some directory"
$excel_Array = (Get-Content $excelFile)[0].split(",")
foreach ($sqlName in $excel_Array)
{
if($sqlName::exists($functionDirectory + "/" + $sqlName) -ne $true)
{
invoke-sqlcmd -inputfile $functionDirectory + "/" + $sqlName -serverinstance "serverinstance" -database "database"
}
}

Answer 1

If understand the question correctly, you need to use Test-Path not ::exists
$excelFile = "C:/ExcelTest/Test.csv"
$functionDirectory = "some directory"
Import-Csv $excelFile |
Foreach-Object {
$filename = $functionDirectory + '\' + $_[0]
if (Test-Path $filename) {
invoke-sqlcmd -inputfile $filename -serverinstance "serverinstance" -database "database"
}
}

Answer 2

I would adjust a few things in your script to properly handle a CSV and then utilize built-in cmdlet for testing the path of a given file.
[cmdletbinding()]
param()
Import-Module SQLPS -DisableNameChecking
$functionDirectory = "C:\temp\PowerShell_Testing2"
$excelFile = Import-Csv "C:\temp\PowerShell_Testing\SQLFileList.csv"
foreach ($e in $excelFile) {
$fileonly = Split-Path $e.SQLFile -Leaf
$fdFile = $functionDirectory + "\" + $fileonly
if (Test-Path $fdFile) {
Write-Host "Found File $fdFile"
Invoke-Sqlcmd -ServerInstance "MANATARMS\SQL12" -InputFile $fdFile -Database master
}
}
In my setup there is only one file that just runs:
SELECT TOP 1 name FROM sys.databases
If your CSV contains say a ServerName, and then SQLFile you can adjust your script to also pull the ServerInstance value like this:
[cmdletbinding()]
param()
Import-Module SQLPS -DisableNameChecking
$functionDirectory = "C:\temp\PowerShell_Testing2"
$excelFile = Import-Csv "C:\temp\PowerShell_Testing\SQLFileList.csv"
foreach ($e in $excelFile) {
$fileonly = Split-Path $e.SQLFile -Leaf
$fdFile = $functionDirectory + "\" + $fileonly
if (Test-Path $fdFile) {
Write-Host "Found File $fdFile"
Invoke-Sqlcmd -ServerInstance $e.ServerName -InputFile $fdFile -Database master
}
}