Импортиране на XML в SQL Server, но опит за създаване на множество записи, ако съществуват множество резултати за дъщерен елемент

Това трябва да ви стигне доста далеч. Той е напълно нетестван, така че, моля, прочетете кода, разберете го и направете съответните промени, за да работи.

Премахнах function и вместо това вмъкна целия код в цикъла, функцията беше твърде обемиста за моя вкус. Сега трябва да можете да виждате по-ясно какво се случва.

На практика това е един и същи код два пъти, с малка допълнителна стъпка, която добавя самопрепратки, така че да можете да правите заявки за всеки продукт чрез основния му идентификатор и неговите вторични идентификатори по същия начин, както е обсъдено в коментарите.

$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"