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ebjim's avatar
ebjim
Resolver I
2 years ago
Solved

Changing lakehouse table column names

While I have seen articles here and there about using notebooks to alter the name of a lakehouse table column, the new names don't sync up with the SQL endpoint. Am I correct to say that Microsoft does not officially allow for lakehouse table columns to be individually renamed?

data engineering
  • Anonymous's avatar
    Anonymous
    2 years ago

    Hi ebjim 
    Thanks for using Fabric Community.
    Rename does/should work without column mapping enabled on spark. So we need to know the version of spark used and the version of delta + if column mapping was enabled on the table. You can check the column mapping details as below:

     

    So if you want to rename a column today, you need to add a column.

     


    But there is no way to delete it, unless they turn on column mapping or rewrite the table back.

     


    With column mapping, the spark table is updated, but the SQL endpoint table is not updated.

     


    Hope this helps. Please let me know if you have any further queries.

3 Replies

    • Anonymous's avatar
      Anonymous
      Not applicable
      2 years ago

      Hi ebjim 
      Thanks for using Fabric Community.
      Rename does/should work without column mapping enabled on spark. So we need to know the version of spark used and the version of delta + if column mapping was enabled on the table. You can check the column mapping details as below:

       

      So if you want to rename a column today, you need to add a column.

       


      But there is no way to delete it, unless they turn on column mapping or rewrite the table back.

       


      With column mapping, the spark table is updated, but the SQL endpoint table is not updated.

       


      Hope this helps. Please let me know if you have any further queries.