将 Power BI 连接到 Postgresql 会引发重复键错误

Question

我正在尝试将 PowerBI 连接到 Postgres。我们有：

Office 2016
Npgsql 3.0.3
x86_64-unknown-linux-gnu 上的 PostgreSQL 9.4.1，由 gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-11) 编译，64 位

当我单击所需的 table 时，出现此错误：

Error inesperado: Ya existe una entrada con la misma clave.
Detalles:
    Microsoft.Mashup.Evaluator.Interface.ErrorException: Ya existe una entrada con la misma clave. ---> Microsoft.Mashup.Evaluator.Interface.ErrorException: Ya existe una entrada con la misma clave. ---> Microsoft.Mashup.Evaluator.Interface.ErrorException: Ya existe una entrada con la misma clave. ---> Microsoft.Mashup.Evaluator.Interface.ErrorException: Ya existe una entrada con la misma clave. ---> System.ArgumentException: Ya existe una entrada con la misma clave.
   en System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
   en System.Collections.Generic.TreeSet`1.AddIfNotPresent(T item)
   en System.Collections.Generic.SortedDictionary`2.Add(TKey key, TValue value)
   en Microsoft.Mashup.Engine1.Library.Common.DbEnvironment.RetrieveIncomingRelationshipsForTable(String schemaName, String tableName)
   en Microsoft.Mashup.Engine1.Library.Common.NavigationPropertiesHelper.RetrieveLinks(NavigationPropertiesRecord navigationPropertyRecord, TableValue table, DbEnvironment environment)
   en Microsoft.Mashup.Engine1.Library.Common.NavigationPropertiesHelper.AddNavigationPropertiesToTable(NavigationPropertiesRecord record, DbEnvironment environment, TableValue table, NameGenerator nameGenerator)
   en Microsoft.Mashup.Engine1.Library.Common.NavigationPropertiesHelper.NavigationPropertiesRecord.get_Item(SchemaItem key)
   en Microsoft.Mashup.Engine1.Library.Common.NavigationPropertiesHelper.LinkTableFunctionValue.TypedInvoke()
   en Microsoft.Mashup.Engine1.Runtime.NativeFunctionValue0`1.Invoke()
   en Microsoft.Mashup.Engine1.Runtime.Relationship.EnsureRightKeyColumns()
   en Microsoft.Mashup.Engine1.Runtime.Relationship.get_RightKeyColumns()
   en Microsoft.Mashup.Engine1.Runtime.Relationship.Microsoft.Mashup.Engine.Interface.IRelationship.OtherKeyColumn(Int32 index)
   en Microsoft.Mashup.Evaluator.ArrayHelpers.NewArray[T](Int32 count, Func`2 getter)
   en Microsoft.Mashup.Evaluator.ITableSourceSerializationExtensions.WriteIRelationship(BinaryWriter writer, IRelationship relationship)
   en Microsoft.Mashup.Evaluator.BinaryReaderWriterExtensions.WriteArray[T](BinaryWriter writer, T[] array, Action`2 writeItem)
   en Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.TableSourceMessage.Serialize(BinaryWriter writer)
   en Microsoft.Mashup.Evaluator.BinarySerializer.Serialize(Action`1 serializer)
   en Microsoft.Mashup.Evaluator.Interface.BufferedMessage.Prepare()
   en Microsoft.Mashup.Evaluator.ChannelMessenger.Post(MessageChannel channel, Message message)
   en Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.<>c__DisplayClass10.<OnBeginGetPreviewValueSource>b__f(EvaluationResult2`1 result)
   en Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetResult[T](IMessageChannel channel, BeginGetResultMessage message, Action`1 handler)
   --- Fin del seguimiento de la pila de la excepción interna ---
   en Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetResult[T](IMessageChannel channel, BeginGetResultMessage message, Action`1 handler)
   en Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetPreviewValueSource(IMessageChannel channel, BeginGetPreviewValueSourceMessage message)
   en Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   en Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   en Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   en Microsoft.Mashup.Evaluator.ChannelMessenger.OnMessageWithUnknownChannel(IMessageChannel baseChannel, MessageWithUnknownChannel messageWithUnknownChannel)
   en Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   en Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   en Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   en Microsoft.Mashup.Evaluator.EvaluationHost.Run()
   en Microsoft.Mashup.Container.EvaluationContainerMain.Run(Object args)
   en Microsoft.Mashup.Evaluator.SafeThread2.<>c__DisplayClass15.<CreateAction>b__14(Object o)
   en Microsoft.Mashup.Container.EvaluationContainerMain.SafeRun(String[] args)
   en Microsoft.Mashup.Container.EvaluationContainerMain.Main(String[] args)
   --- Fin del seguimiento de la pila de la excepción interna ---
   en Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.OnEvaluationException(IMessageChannel channel, EvaluationExceptionMessage message)
   en Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   en Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   en Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   en Microsoft.Mashup.Evaluator.Interface.IMessageChannelExtensions.WaitFor[T](IMessageChannel channel)
   en Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.PreviewValueSourceRemoteEvaluation.GetResult(Boolean enableFirewall)
   en Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.EvaluationThread(Object state)
   --- Fin del seguimiento de la pila de la excepción interna ---
   en Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.RemoteEvaluation`1.TryCompleteWithException(Exception exception)
   en Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.EvaluationThread(Object state)
   en Microsoft.Mashup.Evaluator.SafeThread2.<>c__DisplayClass15.<CreateAction>b__14(Object o)
   en System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   en System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   en System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
   en System.Threading.ThreadPoolWorkQueue.Dispatch()
   --- Fin del seguimiento de la pila de la excepción interna ---
   en Microsoft.Mashup.Evaluator.Interface.EvaluationResult2`1.get_Result()
   en Microsoft.Mashup.Host.Document.Preview.PreviewEvaluation.<>c__DisplayClassb.<StartEvaluation>b__8(EvaluationResult2`1 result)

Answer 1

这绝对是 Power Query 中的错误。

能否让错误再次发生，然后选择[发送皱眉]将错误输入我们的系统？

谢谢！

Answer 2

我能够在以下情况下重现：

tableA, tableB, tableC

tableA has a foreign key directed to tableC's primary key

tableB has a foreign key directed to tableC's primary key

both of these foreign keys have the same constraint name.

你能确认你的数据库是这样的吗？（tableC 不必是您尝试连接的 table，它可以是您数据库中的任何 table。）

修复将在几个月后出现在 PowerQuery 中，您可以尝试重命名这些外键约束之一，而不是等待它。

感谢您向我们报告问题，

奥古兹

将 Power BI 连接到 Postgresql 会引发重复键错误

Connecting Power BI to Postgresql throw a duplicate key error

npgsql

powerpivot

powerquery

powerbi