Microsoft Azure Cloud Cover Show

Cloud Cover Episode 10 - Table Storage API

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Description

Join Ryan and Steve each week as they cover the Microsoft cloud. You can follow and interact with the show at @cloudcovershow

In this episode:

  • Learn about the Table storage model - PartitionKeys, RowKeys, and more.
  • Walk around the API using the StorageClient library and learn how to query the service without first building a data model.
  • Hear the latest news and announcements for the platform.
  • Troubleshoot a common query error when using Table storage. 

Show Links:

Windows Azure Guidance - Failure Recovery (via Eugenio)
SELECT INTO with SQL Azure
Application Infrastructure Virtual Learning
Windows Azure Firestarter videos
Protecting Blobs from Application Errors
Protecting Tables from Application Errors
Table Storage Backup and Restore on CodePlex

Tags:

Azure, Cloud Services, Windows Azure

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The Discussion

  • User profile image
    DaveSn

    The biggest issue I have with Azure Table Storage is the lack of string comparison operators.

    If I can do
    .Where(a=>a.Age > 21)

    and

    .Where(a=>a.Name.CompareTo("Dave"))

    then why can't I do

    .Where(a=>a.Name.ToLower().Contains("dave"))

    Is this an architectural constraint or rather an implementation limitation?

    If it's an implementation limitation, then I can hope that it will be fixed in a future release.

    If it's architectural, then I will have to find an alternative solution such as SQL Azure.

  • User profile image
    dunnry

    Hi DaveSn,

     

    Currently, this is a limitation in the actual storage service.  The LINQ provider eventually boils down to a URI with some syntax that is or isn't supported on the service head.  It turns out that certain operations that are supported in relational sources are not supported in Windows Azure tables.  Your specific question would entail a full-text search to be performed on an arbitrary column in Windows Azure.  This is not currently supported (there is no LIKE operation).  This limit might be removed over time as more features are added to the service.

     

    If you really need full text search capability over your data - take a look at the Lucene implementation here:

     

    http://code.msdn.microsoft.com/AzureDirectory

     

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