Importerar XML till SQL Server men försöker göra flera poster om det finns flera resultat för ett underordnat element

Det här borde ta dig ganska långt. Den är helt opröstad, så läs koden, förstå den och gör lämpliga ändringar för att få den att fungera.

Jag har tagit bort function och infogade all kod i slingan istället, funktionen var för skrymmande för min smak. Nu borde du kunna se tydligare vad som händer.

Det är faktiskt exakt samma kod två gånger, med ett litet extra steg som lägger till självreferenser så att du kan fråga varje produkt via dess primära ID och och dess sekundära ID på samma sätt, som diskuteras i kommentarerna.

$connectionString = "Data Source=Apps2\Apps2;Initial Catalog=ICECAT;Integrated Security=SSPI"
$batchSize = 50000

# set up [files_index] datatable & read schema from DB
$files_index_table = New-Object System.Data.DataTable
$files_index_adapter = New-Object System.Data.SqlClient.SqlDataAdapter("SELECT * FROM files_index WHERE 0 = 1", $connectionString)
$files_index_adapter.Fill($files_index_table) | Out-Null
$files_index_bcp = New-Object SqlBulkCopy($connectionString)
$files_index_bcp.DestinationTableName = "dbo.files_index"
$files_index_count = 0

# set up [product_ids] datatable & read schema from DB
$product_ids_table = New-Object System.Data.DataTable
$product_ids_adapter = New-Object System.Data.SqlClient.SqlDataAdapter("SELECT * FROM product_ids WHERE 0 = 1", $connectionString)
$product_ids_adapter.Fill($product_ids_table) | Out-Null
$product_ids_bcp = New-Object System.Data.SqlClient.SqlBulkCopy($connectionString)
$product_ids_bcp.DestinationTableName = "dbo.product_ids"
$product_ids_count = 0

# main import loop
$xmlReader = New-Object System.Xml.XmlTextReader("C:\Scripts\icecat\files.index.xml")
while ($xmlReader.Read()) {
    # skip any XML nodes that aren't elements
    if ($xmlReader.NodeType -ne [System.Xml.XmlNodeType]::Element) { continue }

    # handle <file> elements
    if ($xmlReader.Name -eq "file") {
        $files_index_count++

        # remember current product ID, we'll need it when we hit the next <M_Prod_ID> element
        $curr_product_id = $xmlReader.GetAttribute("Product_ID")
        $is_new_file = $true

        $newRow = $files_index_table.NewRow()
        $newRow["Product_ID"] = $xmlReader.GetAttribute("Product_ID")
        $newRow["path"] = $xmlReader.GetAttribute("path")
        $newRow["Updated"] = $xmlReader.GetAttribute("Updated")
        $newRow["Quality"] = $xmlReader.GetAttribute("Quality")
        $newRow["Supplier_id"] = $xmlReader.GetAttribute("Supplier_id")
        $newRow["Prod_ID"] = $xmlReader.GetAttribute("Prod_ID")
        $newRow["Catid"] = $xmlReader.GetAttribute("Catid")
        $newRow["On_Market"] = $xmlReader.GetAttribute("On_Market")
        $newRow["Model_Name"] = $xmlReader.GetAttribute("Model_Name")
        $newRow["Product_View"] = $xmlReader.GetAttribute("Product_View")
        $newRow["HighPic"] = $xmlReader.GetAttribute("HighPic")
        $newRow["HighPicSize"] = $xmlReader.GetAttribute("HighPicSize")
        $newRow["HighPicWifiles_index_tableh"] = $xmlReader.GetAttribute("HighPicWifiles_index_tableh")
        $newRow["HighPicHeight"] = $xmlReader.GetAttribute("HighPicHeight")
        $newRow["Date_Added"] = $xmlReader.GetAttribute("Date_Added")
        $files_index_table.Rows.Add($newRow) | Out-Null

        if ($files_index_table.Rows.Count -eq $batchSize) {
            $files_index_bcp.WriteToServer($files_index_table)
            $files_index_table.Rows.Clear()
            Write-Host "$files_index_count <file> elements processed so far"
        }
    # handle <M_Prod_ID> elements
    } elseif ($xmlReader.Name -eq "M_Prod_ID") {
        $product_ids_count++

        # add self-reference row to the [product_ids] table
        # only for the first <M_Prod_ID> per <file> we need to do this
        if ($is_new_file) {
            $newRow = $product_ids_table.NewRow()
            $newRow["Product_ID"] = $curr_product_id  # from above
            $newRow["Alternative_ID"] = $curr_product_id
            $product_ids_table.Rows.Add($newRow) | Out-Null
            $is_new_file = $false
        }

        $newRow = $product_ids_table.NewRow()
        $newRow["Product_ID"] = $curr_product_id  # from above
        $newRow["Alternative_ID"] = $xmlReader.Value
        $product_ids_table.Rows.Add($newRow) | Out-Null

        if ($product_ids_table.Rows.Count -eq $batchSize) {
            $product_ids_bcp.WriteToServer($files_index_table)
            $product_ids_table.Rows.Clear()
            Write-Host "$product_ids_count <M_Prod_ID> elements processed so far"
        }
    }
}

# write any remaining rows to the server
if ($files_index_table.Rows.Count -gt 0) {
    $files_index_bcp.WriteToServer($files_index_table)
    $files_index_table.Rows.Clear()
}
Write-Host "$files_index_count <file> elements processed overall"

if ($product_ids_table.Rows.Count -gt 0) {
    $product_ids_bcp.WriteToServer($product_ids_table)
    $product_ids_table.Rows.Clear()
}
Write-Host "$product_ids_count <M_Prod_ID> elements processed overall"