Public/Get-SQLServerDataTypeFromDataTable.ps1
|
function Get-SQLServerDataTypeFromDataTable { param([System.Data.DataTable]$table ,[string]$columnName) $outObj = New-Object PSObject $outObj | Add-Member -Type NoteProperty -Name "minValue" -Value 0 $outObj | Add-Member -Type NoteProperty -Name "maxValue" -Value 0 $outObj | Add-Member -Type NoteProperty -Name "derivedDataType" -Value 0 $outObj | Add-Member -Type NoteProperty -Name "derivedSize" -Value 0 $outObj | Add-Member -Type NoteProperty -Name "derivedFSDataTypeDefinition" -Value 0 switch ($col.DataType.Name) { "DateTime" { $dataType = '[DateTime]' $outObj.derivedDataType = 'DateTime' $outObj.derivedFSDataTypeDefinition = $outObj.derivedDataType break } "String" { foreach ($dr in $dataTable.Rows) { $curRowVal = $dr.Item($columnName) $outObj.MinValue = [math]::Min($outObj.MaxValue,$curRowVal.Length); $outObj.MaxValue = [math]::Max($outObj.MaxValue,$curRowVal.Length + 1); } $roundIn = $outObj.MaxValue / 10.0 $roundOut = [math]::Ceiling($roundIn) $outObj.derivedSize = if ($outObj.MaxValue -ge 2147483647) { 'MAX' } else { $roundOut * 20 } $outObj.derivedDataType = 'VARCHAR' $outObj.derivedFSDataTypeDefinition = "VARCHAR($($outObj.derivedSize))" break } default { Write-Log "Defaulting to varchar(max) datatype" Debug $outObj.derivedSize = 'MAX' $outObj.derivedDataType = 'VARCHAR' $outObj.derivedFSDataTypeDefinition = "$($outObj.derivedDataType)($($outObj.derivedSize))" break } } Write-Output $outObj } Export-ModuleMember -Function Get-SQLServerDataTypeFromDataTable |