# Get-ERPEntitySets

Cmdlet to retrieve metadata informations about EntitySets.

## Syntax

```{code-block} powershell
:linenos: true

Get-ERPEntitySets [[-Service] <String>] [<CommonParameters>]
```

## Parameters

| Type   | Name    | Description                               | Optional |
|--------|---------|-------------------------------------------|----------|
| String | Service | Retrieve only EntitySets for this service | yes      |


## Return type

[EntitySet](</code_reference/commandlets/objects/entityset>) **\[\]** ← on success\
**empty array** ← on failure. Exception/ErrorMessage can be accessed using [\$Error](<https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_automatic_variables?view=powershell-5.1#error>).

## Remarks

When calling the Get-ERPSEntitySets without arguments the EntitySets of all available services are returned.

## Examples

In the following examples we are using public OData Services (<http://services.odata.org>) for demonstration purposes:

**Getting all EntitySets**

```{code-block} powershell
:linenos: true

Get-ERPEntitySets
```

**Get EntitySets from the Service:**

```{code-block} powershell
:linenos: true

Get-ERPEntitySets -Service "Northwind.svc"
```

**Error handling: Check if an error appeared by using [\$?](<https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_automatic_variables?view=powershell-5.1#section-1>) and analyze the [WebRequestException](</code_reference/net_library/webrequestexception>) to understand why the error occurred, by using \$Error:** 

```{code-block} powershell
:linenos: true

$entitySets = Get-ERPEntitySets -Service "SomeService"
if(-not $entitySets){
        if($? -eq $false){
                $Error[0].Exception #Could not find any service for: 'SomeService'
        }
        else{
                Write-Host("The Service 'SomeService' does not have any EntitySets!")
        }
}
```