SQL Server 2008 のテーブルに細断処理している XML ファイルがあります。これは数ノードの深さになります。これは私にとって初めての試みであるため、どこかでポイントを逃していると確信しています。
動作するようになりましたが、97 レコードの XML の場合、各レコードを 97 回取得します。つまり、結果セットには合計 9409 行が含まれます。これには約 37 秒かかります。使用するSELECT DISTINCTと、97行が得られますが、（予想どおり）37秒もかかります。
XML の最初の行:
<?xml version="1.0" encoding="utf-8"?>
<trmFileDataStream>
<getTransactionDetails>
<getTransactionDetailsResponse>
<messages>
<resultCode>Ok</resultCode>
<message>
<code>I00001</code>
<text>Successful.</text>
</message>
</messages>
<transaction>
<transId>4570599999</transId>
<submitTimeUTC>2012-08-12T20:52:05.01Z</submitTimeUTC>
<submitTimeLocal>2012-08-12T15:52:05.01</submitTimeLocal>
<transactionType>authCaptureTransaction</transactionType>
<transactionStatus>pendingSettlement</transactionStatus>
<responseCode>1</responseCode>
<responseReasonCode>1</responseReasonCode>
<responseReasonDescription>Approval</responseReasonDescription>
<AVSResponse>P</AVSResponse>
<batch>
<batchId>2007999999</batchId>
<settlementTimeUTC>2012-08-12T21:12:40.193Z</settlementTimeUTC>
<settlementTimeLocal>2012-08-12T16:12:40.193</settlementTimeLocal>
<settlementState>pendingSettlement</settlementState>
</batch>
<authAmount>99.04</authAmount>
<settleAmount>99.04</settleAmount>
<taxExempt>false</taxExempt>
<payment>
<bankAccount>
<routingNumber>XXXXCCCC</routingNumber>
<accountNumber>XXXXNNNN</accountNumber>
<nameOnAccount>Account Name</nameOnAccount>
<echeckType>WEB</echeckType>
</bankAccount>
</payment>
<customer>
<id>UWYN201H7C</id>
</customer>
<billTo>
<firstName>FirstName</firstName>
<lastName>LastName</lastName>
<address>123245 Some street.</address>
<city>Some City</city>
<state>WS</state>
<zip>36123</zip>
<country>USA</country>
<phoneNumber>1234567891</phoneNumber>
</billTo>
<recurringBilling>false</recurringBilling>
</transaction>
</getTransactionDetailsResponse>
私のSELECT声明：
SELECT distinct
transactions.value ('(transId/text())[1]','varchar(100)') AS transID,
Replace(Replace(transactions.value ('(submitTimeUTC/text())[1]','varchar(100)'),'T',' '),'Z',' ') AS submitTimeUTC,
Replace(transactions.value ('(submitTimeLocal/text())[1]','varchar(100)'),'T',' ') AS submitTimeLocal,
transactions.value ('(transactionType/text())[1]','varchar(100)') AS transactionType,
transactions.value ('(transactionStatus/text())[1]','varchar(100)') AS transactionStatus,
transactions.value ('(responseCode/text())[1]','varchar(100)') AS responseCode,
transactions.value ('(responseReasonCode/text())[1]','varchar(100)') AS responseReasonCode,
transactions.value ('(responseReasonDescription/text())[1]','varchar(100)') AS responseReasonDescription,
transactions.value ('(AVSResponse/text())[1]','varchar(100)') AS AVSResponse,
transactions.value ('(authAmount/text())[1]','decimal(10,2)') AS authAmount,
transactions.value ('(settleAmount/text())[1]','decimal(10,2)') AS settleAmount,
transactions.value ('(taxExempt/text())[1]','varchar(100)') AS taxExempt,
transactions.value ('(recurringBilling/text())[1]','varchar(100)') AS recurringBilling,
rootb.value ('(fileInformationLine/text())[1]','varchar(100)') AS FileInfo,
messagesb.value ('(resultCode/text())[1]','varchar(100)') AS resultCode,
messageb.value ('(code/text())[1]','varchar(100)') AS MsgCode,
messageb.value ('(text/text())[1]','varchar(100)') AS MsgText,
batch.value ('(batchId/text())[1]','varchar(100)') AS batchID,
batch.value ('(settlementTimeUTC/text())[1]','varchar(100)') AS settlementTimeUTC,
batch.value ('(settlementTimeLocal/text())[1]','varchar(100)') AS settlementTimeLocal,
batch.value ('(settlementState/text())[1]','varchar(100)') AS settlementState,
bankacc.value ('(routingNumber/text())[1]','varchar(100)') AS routingNumber,
bankacc.value ('(accountNumber/text())[1]','varchar(100)') AS accountNumber,
bankacc.value ('(nameOnAccount/text())[1]','varchar(100)') AS nameOnAccount,
bankacc.value ('(echeckType/text())[1]','varchar(100)') AS echeckType,
Customer.value ('(id/text())[1]','varchar(100)') AS customerID,
billTo.value ('(firstName/text())[1]','varchar(100)') AS firstName,
billTo.value ('(lastName/text())[1]','varchar(100)') AS lastName,
billTo.value ('(address/text())[1]','varchar(100)') AS address,
billTo.value ('(city/text())[1]','varchar(100)') AS city,
billTo.value ('(state/text())[1]','varchar(100)') AS state,
billTo.value ('(zip/text())[1]','varchar(100)') AS zip,
billTo.value ('(country/text())[1]','varchar(100)') AS country,
billTo.value ('(phoneNumber/text())[1]','varchar(100)') AS phoneNumber
FROM
xmlImportTempTable
/* Message branch */
CROSS APPLY
xml_data.nodes('//trmFileDataStream/getTransactionDetails/getTransactionDetailsResponse') AS tMsg(getTD)
OUTER APPLY getTD.nodes('messages') AS getTD(messagesb)
OUTER APPLY messagesb.nodes('message') AS messagesb(messageb)
/* Transaction branches */
CROSS APPLY xml_data.nodes('//trmFileDataStream') AS Txn(rootb)
OUTER APPLY rootb.nodes('getTransactionDetails') AS rootb(getTransDetl)
OUTER APPLY getTransDetl.nodes('getTransactionDetailsResponse') AS rootc(getTransDtlResp)
OUTER APPLY getTransDtlResp.nodes('transaction') AS rootd(transactions)
OUTER APPLY transactions.nodes('batch') AS btc(batch)
OUTER APPLY transactions.nodes('payment') AS pmt(payment)
OUTER APPLY payment.nodes('bankAccount') AS bacc(bankacc)
OUTER APPLY transactions.nodes('customer') AS cust(customer)
OUTER APPLY transactions.nodes('billTo') AS billing(billTo)
ORDER BY transID
正しい結果セットを抽出できるため、パフォーマンスに耐えることができます (これは継続的なインポートであり、xml ファイルはこれよりも 6 ～ 7 倍大きくなる可能性があります)。しかし、これを正しく行う方法を正確に把握できるようになりたいと思います! スキーマを追加すると、明日やってみます。複数の行は、私にとって厄介な問題です。
事前に多くの感謝:)
Arnor Baldvinsson、Icetips Alta LLC