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Data Engineering
Join discussions on data engineering best practices, architectures, and optimization strategies within the Databricks Community. Exchange insights and solutions with fellow data engineers.
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Forum Posts

Anup
by New Contributor III
  • 9874 Views
  • 1 replies
  • 1 kudos

Resolved! Copy Into : Pattern for sub-folders

While trying to ingest data from the S3 bucket, we are running into a situation where the data in s3 buckets is in sub-folders of multiple depths.Is there a good way of specifying patterns for the above case?We tried using the following for a depth o...

  • 9874 Views
  • 1 replies
  • 1 kudos
MinMin
by New Contributor II
  • 5409 Views
  • 3 replies
  • 0 kudos

Extra underscore behind ".xlsm" and ".xlsx" after exporting excel files from Databricks

Hi all, I tried to export several excel files from Databricks. But there will always be one extra underscore behind ".xlsm" and ".xlsx", if I export them and try to open the files on local system. I have to manually remove the underscore from the fil...

  • 5409 Views
  • 3 replies
  • 0 kudos
Latest Reply
DH_Fable
New Contributor II
  • 0 kudos

Hi, did you find a solution this? I have the same/similar problem where when I save a dataframe from a Databricks notebook using to_excel() it saves the file with extension ".xlsx_" rather then "xlsx", meaning to open I have to manually download and ...

  • 0 kudos
2 More Replies
Kira
by New Contributor
  • 1639 Views
  • 0 replies
  • 0 kudos

FeatureStoreClient speed up create_training_set

I am trying to create training set with 10 Feature Lookups (about 1200 features total). # all args for create_training_set df = fs.create_training_set(args).load_df()I must store this data to delta table for further analysis. Writing this returned da...

Data Engineering
Feature Store
MachineLearning
  • 1639 Views
  • 0 replies
  • 0 kudos
williamwjs
by New Contributor II
  • 9405 Views
  • 2 replies
  • 1 kudos

Issue with Could not initialize class $linec4a1686037264c21b0e58b369fab8f2d59.$read$

Our job is written in Scala on DataBricks. It used to have the same problem, but was managed to work with putting all case classes in a separate cell. However, lately it started to fail again due to the same error:Could not initialize class $linec4a1...

  • 9405 Views
  • 2 replies
  • 1 kudos
Latest Reply
williamwjs
New Contributor II
  • 1 kudos

Hi @Retired_mod , may I ask if there's any updates to this issue? Thank you!

  • 1 kudos
1 More Replies
fijoy
by Contributor
  • 22306 Views
  • 6 replies
  • 11 kudos

How to remove widgets from a notebook dashboard?

I'm creating a dashboard from the output of a notebook cell, but noticing that the dashboard displays the the widgets of the notebook in addition to the cell output. How can I remove the widgets from the dashboard?

  • 22306 Views
  • 6 replies
  • 11 kudos
Latest Reply
Nico2
New Contributor II
  • 11 kudos

Did you find any solution for this? I am facing a similar issue wanting to create multiple dashboads on a single notebook where not all widgets are relevant for both dashboards. this makes it difficult for users to understand the dahsboard.

  • 11 kudos
5 More Replies
Dp15
by Contributor
  • 9873 Views
  • 1 replies
  • 1 kudos

Schema Deletion -Structured Streaming

Hi,I have a Structured Stream which reads data from my silver layer and creates a gold layer using foreachBatch. The stream has been working fine, but now I have change where there are deletions to the schema and some of the columns from the silver l...

  • 9873 Views
  • 1 replies
  • 1 kudos
Latest Reply
Dp15
Contributor
  • 1 kudos

@Retired_mod Thank you so much for a detailed explanation 

  • 1 kudos
Phani1
by Databricks MVP
  • 14693 Views
  • 2 replies
  • 2 kudos

encryption

Hi Databricks, Could you please guide me on the below scenario?Here is the use case we are trying to solve forCurrently environment is using “Voltage” as an encryption tool for encrypting the data in S3 in conjunction with business business-provided ...

  • 14693 Views
  • 2 replies
  • 2 kudos
Latest Reply
AliaCollier
New Contributor II
  • 2 kudos

To replace "Voltage" with Databricks encryption, follow these steps: set up a Customer Managed Key in AWS, configure the S3 bucket, read data in Databricks, and implement custom UDFs for AES encryption/decryption.

  • 2 kudos
1 More Replies
TiagoMag
by New Contributor III
  • 12514 Views
  • 1 replies
  • 2 kudos

Resolved! DLT pipeline evolution schema error

Hello everyone, I am currently working on my first dlt pipeline, and I stumped on a problem which I am struggling to solve.I am working on several tables where I have a column called "my_column" with an array of json with two keys : 1 key : score, 2n...

  • 12514 Views
  • 1 replies
  • 2 kudos
david3
by New Contributor III
  • 5995 Views
  • 4 replies
  • 3 kudos

Resolved! delta live table udf not known when defined in python module

Hi I have the problem that my "module" is not known when used in a user defined function. The precise message is posted below. I have a repo structure as follows:  analytics_pipelines │ ├── __init__.py │ ├── coordinate_transformation.py │ ├── d...

  • 5995 Views
  • 4 replies
  • 3 kudos
Latest Reply
david3
New Contributor III
  • 3 kudos

Hiyes, I discovered three working possibilities:Define the pandas functions as inline function as pointed out aboveDefine the pandas function in the same script that is imported as "library" in the dlt config ( libraries: - notebook: path: ./pipeline...

  • 3 kudos
3 More Replies
561064
by New Contributor II
  • 10247 Views
  • 2 replies
  • 0 kudos

Exporting delta table to one CSV

Process to export a delta table is taking ~2hrs.Delta table has 66 partitions with total size of ~6gb, 4million rows and 270 columns.Used below commanddf.coalesce(1).write.csv("path")what are my options to reduce the time?

  • 10247 Views
  • 2 replies
  • 0 kudos
Latest Reply
Dribka
New Contributor III
  • 0 kudos

A very interesting task in front of you.... let me know how you solve it!

  • 0 kudos
1 More Replies
BenLambert
by Contributor
  • 15813 Views
  • 4 replies
  • 0 kudos

Resolved! Explode is giving unexpected results.

I have a dataframe with a schema similar to the following:id: stringarray_field: array   element: struct          field1: string          field2: string          array_field2: array               element: struct                     nested_field: stri...

  • 15813 Views
  • 4 replies
  • 0 kudos
Latest Reply
BenLambert
Contributor
  • 0 kudos

It turns out that if the exploded fields don't match the schema that was defined when reading the JSON in the first place that all the data that doesn't match is silently dropped. This is not really nice default behaviour.

  • 0 kudos
3 More Replies
afk
by Databricks Partner
  • 7220 Views
  • 2 replies
  • 2 kudos

Change data feed from target tables of APPLY CHANGES

Up until yesterday I was (sort of) able to read changes from target tables of apply changes operations (either through tables_changes() or using readChangeFeed). I say sort of because the meta columns (_change_type, _commit_version, _commit_timestamp...

  • 7220 Views
  • 2 replies
  • 2 kudos
ElaPG
by New Contributor III
  • 3226 Views
  • 1 replies
  • 0 kudos

DLT concurrent pipeline updates.

Hi!Regarding this info "An Azure Databricks workspace is limited to 100 concurrent pipeline updates." (Release 2023.16 - Azure Databricks | Microsoft Learn), what is considered as an update? Changes in pipeline logic or each pipeline run?

  • 3226 Views
  • 1 replies
  • 0 kudos
sher
by Valued Contributor II
  • 7776 Views
  • 1 replies
  • 0 kudos

How to resolve the column name in s3 path saved as UUID format

our managed databricks tables stored in s3 as default, while i am reading that s3 path directly i am getting the column value as UUIDeg: column name ID in databricks tablewhile checking the S3 Path, the column name looks like COL- b400af61-9tha-4565-...

Data Engineering
deltatable
managedtables
  • 7776 Views
  • 1 replies
  • 0 kudos
Latest Reply
sher
Valued Contributor II
  • 0 kudos

hi @Retired_mod Thank you for you are reply but the issue is i am not able to map  ID with COL- b400af61-9tha-4565-89c4-d6ba43f948b7. i useDESCRIBE TABLE EXTENDED table_namea query to get the list of UUID column names. and for real column name fettin...

  • 0 kudos
rt-slowth
by Contributor
  • 3653 Views
  • 2 replies
  • 1 kudos

How to call a table created with create_table using dlt in a separate notebook?

I created a separate pipeline notebook to generate the table via DLT, and a separate notebook to write the entire output to redshift at the end. The table created via DLT is called spark.read.table("{schema}.{table}").This way, I can import[MATERIALI...

  • 3653 Views
  • 2 replies
  • 1 kudos
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