Forum Discussion

12angrymentiger's avatar
12angrymentiger
Advocate III
2 years ago
Solved

Spark SQL Query errors - Case Sensitivity issues

All of a sudden as of almost 2 weeks ago our spark sql notebooks have been failing due to case sensitivity in the table and field names.  This has always worked fine in Synapse before, so I'm not sure if Fabric configs were changed or not.

I'm getting errors like Table or view not found: customers, when I'm running a spark sql query on the customers table

j = spark.read.format("delta").load(f"Files/{storage_account}/silver/Customers/")
j.createOrReplaceTempView("Customers")
 
df=spark.sql(""" SELECT * FROM customers """)
 
The table name is lower case customers in my spark sql query and the view name is Camelcase, but this query works perfectly fine in Synapse spark sql.
I'm also getting the same error on different case field names.
 
Not sure what I'm missing here as it has worked fine before in Fabric.
data engineering
  • Anonymous's avatar
    Anonymous
    2 years ago

    Hi 12angrymentiger 
    Apologies for the issue you have been facing. At this time, we are reaching out to the internal team to get some help on this. We will update you once we hear back from them.

    A simple workaround to fix this issue is to run the below piece of code before executing the main code.

    spark.conf.set('spark.sql.caseSensitive', False)

    Hope this helps. Please let me know if you have any further questions. Glad to help.

7 Replies

  • 12angrymentiger's avatar
    12angrymentiger
    Advocate III
    2 years ago

    Anonymous  I wanted to check with you regarding this issue.

     Please let me know if you have heard of any fixes for this.

     

    Thanks

    • Anonymous's avatar
      Anonymous
      Not applicable
      2 years ago

      Hi 12angrymentiger 
      Thanks for using Fabric Community. Apologies for the issue you have been facing.
      Can you please confirm which Spark Version are you using? 
      I have confirmed from the internal team that there were no changes done to the case sensitivity. Did you set any spark configurations? If yes can you please give the details about it.
      Thanks.

      • Anonymous's avatar
        Anonymous
        Not applicable
        2 years ago

        Hi 12angrymentiger ,
        I tried to repro the scenario, but did not get any error. I have attached the screenshot.

         

         

        Please try to check the Spark version which you ar using.

         

         

         

        Make sure you use the Spark 1.2 version. 
        Hope this helps. Please let me know if you have any further queries.

  • Leachyboy_007's avatar
    Leachyboy_007
    New Member
    2 years ago

    Hi. I am experiencing a similar issue when running an SQL query in an SQL endpoint on some tables I have in a lakehouse within Microsoft Fabric. to my knowledge SQL isnt a case sensetive languaje so not sure why im having issues on the Fabric endpoint yet my queries run fine on apps such as SSMS.

    Can anyone help??