无法从 ExecuteNonQuery 针对 MS SQL 服务器从 PowerShell 脚本执行的插入中取回计数

Question

以下代码执行成功的 BULK INSERT，但未 return 受影响的行数。当我执行 'SELECT count(*) ...' 确认计数时，已插入数百万行。我怀疑溢出错误是问题的一部分。为什么受影响的行数未达到 return？关于如何获得计数的任何想法？我还有其他几个类似的例程，它们总是 return 计数。

代码

try {

     $Command = New-Object System.Data.SQLClient.SQLCommand
     $Command.Connection = "Persist Security Info=False;Integrated Security=true;Initial Catalog=$($file_info.database);server=$($file_info.db_server_instance)"
     $Command.CommandTimeout = 18000 # 5 hours
     $Command.Connection.Open()

     try {

          $bulkinsert_sql = "BULK INSERT $($file_info.database).$($file_info.owner).$($file_info.table) FROM '$load_file_path' with (ERRORFILE='$load_file_error_path', MAXERRORS=$($file_info.dbload_error_max), TABLOCK, FIELDTERMINATOR='\t')"
          $Command.CommandText = $bulkinsert_sql
          $loaded_cnt=$Command.ExecuteNonQuery()
          write-host "$loaded_cnt ROWS LOADED"

     } catch [System.Data.SqlClient.SqlException] {

          $_ | select -expandproperty invocationinfo | Format-List Line, PositionMessage -force
          write-host $_.Exception.ToString() -foregroundcolor "red"     
          $ErrorActionPreference = "Continue"
     }

     # set error preference back
     $ErrorActionPreference = "stop"

} catch [System.Data.SqlClient.SqlException] {

     $_ | select -expandproperty invocationinfo | Format-List Line, PositionMessage -force
     write-host $_.Exception.ToString() -foregroundcolor "red"
     $ErrorActionPreference = "stop"

} finally {

     if ($Command.Connection -eq 'Open') {
         $Command.Connection.Close()
     }
}

已捕获错误消息

System.Data.SqlClient.SqlException (0x80131904): Bulk load data conversion error (truncation) for row 1714271, column 72 (PROVIDER_NAME1).
Bulk load data conversion error (truncation) for row 1714272, column 72 (PROVIDER_NAME1).
Bulk load data conversion error (truncation) for row 2083378, column 72 (PROVIDER_NAME1).
Bulk load data conversion error (overflow) for row 4633809, column 82 (TF_ME_TOT_DEDUCTIONS).
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, 
TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean&
 usedCache, Boolean asyncWrite, Boolean inRetry)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at CallSite.Target(Closure , CallSite , Object )
ClientConnectionId:ba9e07ac-1bc4-4c59-8a0a-167d7b281644
Error Number:4863,State:1,Class:16

Answer 1

Why is the rows affected count failing to return? Any ideas of how to get the count?

ExecuteNonQuery 不是运行查询的 "lowest level" 方法。它对 SQL 服务器可能 return 的信息做了一些简化假设。

当运行来自客户端的查询 SQL 服务器可以 return 错误消息、行计数消息和结果集的任意组合。但是为了简化正常情况，SqlClient 在看到错误消息时会抛出 SqlException，因此 ExecuteNonQuery 甚至 return（更不用说 return 行数了）。

如果您希望 ExecuteNonQuery return，您可以将所有错误消息重定向到事件处理程序，并使用 SqlConnection.FireInfoMessageEventOnUserErrors.

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