public/Invoke-BulkCopy.ps1
|
<# .SYNOPSIS Uses the .NET SQLBulkCopy class to quickly copy rows into a destination table. .DESCRIPTION Also, the invoke-bulkcopy function allows you to pass a command object instead of a set of records in order to "stream" the records into the destination in cases where there are a lot of records and you don't want to allocate memory to hold the entire result set. .PARAMETER records Either a datatable (like one returned from invoke-query or invoke-storedprocedure) or A command object (e.g. new-sqlcommand), or a datareader object. Note that the command object or datareader object can come from any class that inherits from System.Data.Common.DbCommand or System.Data.Common.DataReader, so this will work with most ADO.NET client libraries (not just SQL Server). .PARAMETER Server The destination server to connect to. .PARAMETER Database The initial database for the connection. .PARAMETER User The sql user to use for the connection. If user is not passed, NT Authentication is used. .PARAMETER Password The password for the sql user named by the User parameter. .PARAMETER Table The destination table for the bulk copy operation. .PARAMETER Mapping A dictionary of column mappings of the form DestColumn=SourceColumn .PARAMETER BatchSize The batch size for the bulk copy operation. .PARAMETER Transaction A transaction to execute the bulk copy operation in. .PARAMETER NotifyAfter The number of rows to fire the notification event after transferring. 0 means don't notify. Ex: 1000 means to fire the notify event after each 1000 rows are transferred. .PARAMETER NotifyFunction A scriptblock to be executed after each $notifyAfter records has been copied. The second parameter ($param[1]) is a SqlRowsCopiedEventArgs object, which has a RowsCopied property. The default value for this parameter echoes the number of rows copied to the console .PARAMETER Options An object containing special options to modify the bulk copy operation. See http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlbulkcopyoptions.aspx for values. .EXAMPLE PS C:\> $cmd=new-sqlcommand -server MyServer -sql "Select * from MyTable" PS C:\> invoke-sqlbulkcopy -records $cmd -server MyOtherServer -table CopyOfMyTable .INPUTS None. You cannot pipe objects to invoke-bulkcopy .OUTPUTS System.Data.SqlClient.SqlCommand #> function Invoke-Bulkcopy{ param([Parameter(Mandatory=$true)]$records, [Parameter(Mandatory=$true)]$server, [string]$database, [string]$user, [string]$password, [Parameter(Mandatory=$true)][string]$table, [hashtable]$mapping=@{}, [int]$batchsize=0, [System.Data.SqlClient.SqlTransaction]$transaction=$null, [int]$notifyAfter=0, [scriptblock]$notifyFunction={Write-Host "$($args[1].RowsCopied) rows copied."}, [System.Data.SqlClient.SqlBulkCopyOptions]$options=[System.Data.SqlClient.SqlBulkCopyOptions]::Default) #use existing "New-Connection" function to create a connection string. $connection=New-Connection -server $server -database $Database -User $user -password $password $connectionString = $connection.ConnectionString $connection.close() #Use a transaction if one was specified if ($transaction -is [System.Data.SqlClient.SqlTransaction]){ $bulkCopy=new-object "Data.SqlClient.SqlBulkCopy" $connectionString $options $transaction } else { $bulkCopy = new-object "Data.SqlClient.SqlBulkCopy" $connectionString } $bulkCopy.BatchSize=$batchSize $bulkCopy.DestinationTableName = $table $bulkCopy.BulkCopyTimeout=10000000 if ($notifyAfter -gt 0){ $bulkCopy.NotifyAfter=$notifyafter $bulkCopy.Add_SQlRowscopied($notifyFunction) } #Add column mappings if they were supplied foreach ($key in $mapping.Keys){ $bulkCopy.ColumnMappings.Add($mapping[$key],$key) | out-null } write-debug "Bulk copy starting at $(get-date)" if ($records -is [System.Data.Common.DBCommand]){ #if passed a command object (rather than a datatable), ask it for a datareader to stream the records $bulkCopy.WriteToServer($records.ExecuteReader()) } elseif ($records -is [System.Data.Common.DbDataReader]){ #if passed a Datareader object use it to stream the records $bulkCopy.WriteToServer($records) } else { $bulkCopy.WriteToServer($records) } write-debug "Bulk copy finished at $(get-date)" } |