Hi everyone,
I'm encountering an error in Power Query when trying to read a parquet file downloaded from Azure Blob Storage. The file is located in my Desktop folder.
Issue:
The Parquet.Document() function throws an "Specified Method is not supported" error when used on this specific file. However, the Parquet.Metadata() function works correctly and displays the metadata as a record.
Troubleshooting Steps Taken:
- I've verified the file is not corrupted by opening it in a separate parquet reader.
Request:
I'd appreciate any insights or suggestions on how to resolve this error and successfully read the data using Parquet.Document(). You can also suggest me some other ways to get this fixed.
Additional Information
I am running the latest version of Power BI Desktop on my PC.
I have also tried the Power Query Online using Dataflows, and getting the same evaluation error.
Azure Data Factory is successfully reading this file.
Any help would be highly appreciated. Thanks!
Here is a short code
let
Source = File.Contents("C:\Users\rashi\Desktop\Parquet files\Method.parquet"),
Data = Parquet.Document(Source)
in
Data
Below is the complete error text.
Unexpected error: Specified method is not supported.
Details:
Microsoft.Mashup.Evaluator.Interface.ErrorException: Specified method is not supported. ---> System.NotSupportedException: Specified method is not supported. ---> System.NotSupportedException: Specified method is not supported.
at Microsoft.Mashup.Engine1.Library.Parquet.ParquetPageReader.Loader`1..ctor(IParquetColumnBuffer`1 buffer, Column column, Action`1 loadColumn)
at Microsoft.Mashup.Engine1.Library.Parquet.ParquetPageReader.Loader`1.Create(ColumnInfo columnInfo, Column column, Int32 maxRowCount)
at Microsoft.Mashup.Engine1.Library.Parquet.ParquetPageReader.ParquetPage..ctor(ColumnInfo[] columnsInfo, TableSchema schema, Int32 maxRowCount)
at Microsoft.Mashup.Engine1.Library.Parquet.ParquetPageReader.CreatePage()
at Microsoft.OleDb.Serialization.PageReaderDataReader..ctor(IPageReader reader, Func`2 cellErrorHandler, Func`2 pageExceptionHandler)
at Microsoft.Mashup.Engine1.Library.Parquet.ParquetQuery.<GetRows>b__24_0()
at Microsoft.Mashup.Engine1.Language.Query.SkipTakeEnumerable.GetEnumerator()
at Microsoft.Mashup.Engine1.Language.Query.QueryTableValue.GetEnumerator()
at Microsoft.Mashup.Engine1.Runtime.TableValue.Microsoft.Mashup.Engine.Interface.ITableValue.GetEnumerator()
at Microsoft.Mashup.Evaluator.SimpleDocumentEvaluator.ValuePreviewValueSource.TableValuePreviewValueSource.SerializeRows(Int32 count)
at Microsoft.Mashup.Evaluator.SimpleDocumentEvaluator.ValuePreviewValueSource.TableValuePreviewValueSource.get_SmallValue()
at Microsoft.Mashup.Evaluator.Interface.TracingPreviewValueSource.get_SmallValue()
at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.<>c__DisplayClass0_0.<RunStub>b__0()
at Microsoft.Mashup.Evaluator.EvaluationHost.ReportExceptions(String entryName, IEngineHost engineHost, IMessageChannel channel, Action action)
--- End of inner exception stack trace ---
at Microsoft.Mashup.Evaluator.EvaluationHost.<>c__DisplayClass17_0.<TryReportException>b__1()
at Microsoft.Mashup.Common.SafeExceptions.IgnoreSafeExceptions(IEngineHost host, IHostTrace trace, Action action)
at Microsoft.Mashup.Evaluator.EvaluationHost.TryReportException(IHostTrace trace, IEngineHost engineHost, IMessageChannel channel, Exception exception)
at Microsoft.Mashup.Evaluator.EvaluationHost.ReportExceptions(String entryName, IEngineHost engineHost, IMessageChannel channel, Action action)
at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.<>c__DisplayClass12_0`1.<OnBeginGetResult>b__0()
at Microsoft.Mashup.Evaluator.EvaluationHost.ReportExceptions(IHostTrace trace, IEngineHost engineHost, IMessageChannel channel, Action action)
at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetResult[T](IMessageChannel channel, BeginGetResultMessage message, Action`1 action)
at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetPreviewValueSource(IMessageChannel channel, BeginGetPreviewValueSourceMessage message)
at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.ChannelMessenger.OnMessageWithUnknownChannel(IMessageChannel baseChannel, MessageWithUnknownChannel messageWithUnknownChannel)
at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.EvaluationHost.Run()
at Microsoft.Mashup.Container.EvaluationContainerMain.Run(Object args)
at Microsoft.Mashup.Evaluator.SafeThread2.<>c__DisplayClass9_0.<CreateAction>b__0(Object o)
at Microsoft.Mashup.Container.EvaluationContainerMain.SafeRun(String[] args)
at Microsoft.Mashup.Container.EvaluationContainerMain.Main(String[] args)
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at Microsoft.Mashup.Container.Program.Main(String[] args)
--- End of inner exception stack trace ---
at Microsoft.Mashup.Evaluator.EvaluationHost.OnException(IEngineHost engineHost, IMessageChannel channel, ExceptionMessage message)
at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.Interface.IMessageChannelExtensions.WaitFor[T](IMessageChannel channel)
at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.PreviewValueSource.WaitFor(Func`1 condition, Boolean disposing)
at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.PreviewValueSource.get_SmallValue()
at Microsoft.Mashup.Evaluator.Interface.TracingPreviewValueSource.get_SmallValue()
at Microsoft.Mashup.Host.Document.Analysis.PackageDocumentAnalysisInfo.PackagePartitionAnalysisInfo.SetPreviewValue(EvaluationResult2`1 result, Func`1 getStaleSince, Func`1 getSampled)
