Functions/Columns/New-SqlVariantColumn.ps1
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function New-SqlVariantColumn { <# .SYNOPSIS Creates a column object representing an SqlVariant datatype. .DESCRIPTION Use this function in the `Column` script block for `Add-Table`: Add-Table 'WithSqlVariant' { SqlVariant 'ColumnName' } ## ALIASES * SqlVariant .EXAMPLE Add-Table 'WithSqlVar' { SqlVariant 'WhoKnows' } Demonstrates how to create an optional `sql_variant` column called `WhoKnows`. .EXAMPLE Add-Table 'WithSqlVar' { SqlVariant 'WhoKnows' -NotNull } Demonstrates how to create a required `sql_variant` column called `WhoKnows`. .EXAMPLE Add-Table 'WithSqlVar' { SqlVariant 'WhoKnows' -Sparse } Demonstrates how to create a sparse, optional `sql_variant` column called `WhoKnows`. .EXAMPLE Add-Table 'WithSqlVar' { SqlVariant 'WhoKnows' -NotNull -Default '1' } Demonstrates how to create a required `sql_variant` column called `WhoKnows` with a default value of `1`. .EXAMPLE Add-Table 'WithSqlVar' { SqlVariant 'WhoKnows' -NotNull -Description 'The contents of this column are left as an exercise for the reader.' } Demonstrates how to create a required `sql_variant` column with a description. #> [CmdletBinding(DefaultParameterSetName='Nullable')] param( [Parameter(Mandatory=$true,Position=0)] [string] # The column's name. $Name, [Parameter(Mandatory=$true,ParameterSetName='NotNull')] [Switch] # Don't allow `NULL` values in this column. $NotNull, [Parameter(ParameterSetName='Nullable')] [Switch] # Store nulls as Sparse. $Sparse, [Parameter()] [string] # A SQL Server expression for the column's default value $Default, [Parameter()] [string] # A description of the column. $Description ) switch ($PSCmdlet.ParameterSetName) { 'Nullable' { $nullable = 'Null' if( $Sparse ) { $nullable = 'Sparse' } [Rivet.Column]::SqlVariant($Name, $nullable, $Default, $Description) } 'NotNull' { [Rivet.Column]::SqlVariant($Name,'NotNull', $Default, $Description) } } } Set-Alias -Name 'SqlVariant' -Value 'New-SqlVariantColumn' |