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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

lprevost
by Contributor
  • 2416 Views
  • 7 replies
  • 2 kudos

Resolved! Incremental Loads from a Catalog/DLT

The databricks guide outlines several use cases for loading data via delta live tables:https://docs.databricks.com/en/delta-live-tables/load.html This includes autoloader from cloudfiles, kafka messages, small static datasets, etc.But, one use case i...

  • 2416 Views
  • 7 replies
  • 2 kudos
Latest Reply
lucasrocha
Databricks Employee
  • 2 kudos

Hello @lprevost , I hope this message finds you well. In order to install this library, you can follow any of the steps below:- First step - search for libraries and versions: Go the cluster;Libraries;Install new;Maven;Search Packages;Change from Spa...

  • 2 kudos
6 More Replies
ameya
by New Contributor
  • 5020 Views
  • 1 replies
  • 0 kudos

Resolved! Adding new columns to a Delta Live table in a CDC process

Hi I am new to databricks and still learning.I am trying to do a CDC on a table.  APPLY CHANGES INTO LIVE.table1 FROM schema2.table2 KEYS (Id) SEQUENCE BY orderByColumn COLUMNS * EXCEPT (col1, col2) STORED AS SCD TYPE 1 ;  table1 is in schema1 and ...

  • 5020 Views
  • 1 replies
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Latest Reply
raphaelblg
Databricks Employee
  • 0 kudos

Hi @ameya , Scenario 1: Enabling Delta schema evolution in your table or at DLT pipeline level should suffice for the scenario of new fields being added to the schema.  Scenario 2: The INSERT statement doesn't support schema evolution as described in...

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NarenderKumar
by New Contributor III
  • 953 Views
  • 2 replies
  • 2 kudos

Resolved! Can we parameterize the compute in job cluster

I have created a workflow job in databricks with job parameters.I want to run the job same with different workloads and data volume.So I want the compute cluster to be parametrized so that I can pass the compute requirements(driver, executor size and...

  • 953 Views
  • 2 replies
  • 2 kudos
Latest Reply
brockb
Databricks Employee
  • 2 kudos

Hi @NarenderKumar , Have you considered leveraging autoscaling for the existing cluster?If this does not meet your needs, are the differing volume/workloads known in advance? If so, could different compute be provisioned using Infrastructure as Code ...

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yusufd
by New Contributor III
  • 5284 Views
  • 5 replies
  • 3 kudos

Pyspark serialization

Hi,I was looking for comprehensive documentation on implementing serialization in pyspark, most of the places I have seen is all about serialization with scala. Could you point out where I can get a detailed explanation on it?

  • 5284 Views
  • 5 replies
  • 3 kudos
Latest Reply
yusufd
New Contributor III
  • 3 kudos

Thank you @Retired_mod  for the prompt reply. This clears the things and also distinguishes between spark-scala and pyspark. Appreciate your explanation. Will apply this and also share any findings based on this which will help the community!

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4 More Replies
jacovangelder
by Honored Contributor
  • 1327 Views
  • 2 replies
  • 8 kudos

How do you define PyPi libraries on job level in Asset Bundles?

Hello,Reading the documentation, it does not state it is possible to define libraries on job level instead of on task level. It feels really counter-intuitive putting libraries on task level in Databricks workflows provisioned by Asset Bundles. Is th...

  • 1327 Views
  • 2 replies
  • 8 kudos
Latest Reply
jacovangelder
Honored Contributor
  • 8 kudos

Thanks @Witold ! Thought so. I decided to go with an init script where I install my dependencies rather than installing libraries. For future reference, this is what it looks like:job_clusters: - job_cluster_key: job_cluster new_cluster: ...

  • 8 kudos
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KendraVant
by New Contributor II
  • 15032 Views
  • 7 replies
  • 2 kudos

Resolved! How do I clear all output results in a notebook?

I'm building notebooks for tutorial sessions and I want to clear all the output results from the notebook before distributing it to the participants. This functionality exists in Juypter but I can't find it in Databricks. Any pointers?

  • 15032 Views
  • 7 replies
  • 2 kudos
Latest Reply
holly
Databricks Employee
  • 2 kudos

Yes! Run > â€ƒClear >  Clear all cell outputs Fun fact, this feature was made ~10 years ago when we realised all our customer demos looked very messy and had lots of spoilers in them!

  • 2 kudos
6 More Replies
kmaley
by New Contributor
  • 632 Views
  • 1 replies
  • 1 kudos

Concurrent append exception - Two streaming sources writing to same record on the delta table

Hi All, I have a scenario where there are 2 streaming sources Stream1( id, col1, col2) and Stream 2( id, col3, col4) and my delta table has columns (id, col1, col2, col3, col4). My requirement is to insert the record into the delta table if the corre...

  • 632 Views
  • 1 replies
  • 1 kudos
Latest Reply
Witold
Honored Contributor
  • 1 kudos

I would keep both write operations separate, i.e. they should write in own tables/partitions. In later stages (e.g. silver), you can easily merge them.

  • 1 kudos
kiranpeesa
by New Contributor
  • 713 Views
  • 1 replies
  • 0 kudos

error in notebook execution

Error in callback <bound method UserNamespaceCommandHook.post_run_cell of <dbruntime.DatasetInfo.UserNamespaceCommandHook object at 0x7f5790c07070>> (for post_run_cell)

  • 713 Views
  • 1 replies
  • 0 kudos
Latest Reply
Witold
Honored Contributor
  • 0 kudos

Can you show us your code?

  • 0 kudos
jesonora
by New Contributor II
  • 994 Views
  • 1 replies
  • 0 kudos

Enable serverless in Delta Live Tables in Azure Databricks?

I'm trying to create a serverless DLT, as far I understood is in Public Review as listed here, Azure Databricks regions - Azure Databricks | Microsoft Learn. I've created a workspace in North Europe, but I cannot see the feature in preview.Could you ...

  • 994 Views
  • 1 replies
  • 0 kudos
Latest Reply
jesonora
New Contributor II
  • 0 kudos

Hi @Retired_mod,Thanks for the quick response. I have checked my region is on Public Preview for DLT, North Europe. But I am not able to see the "Serverless" checkbox.Am I missing some detail?Thanks!

  • 0 kudos
RajaPalukuri
by New Contributor II
  • 2121 Views
  • 3 replies
  • 0 kudos

Databricks -Terraform- (condition_task)

Hi Team ,I am planning to create IF/ELSE condition task in databricks using terraform code . My requirement is Task A ( Extract records from DB and Count recs) --> Task B ( validate the counts using Condition_task) --> Task c ( load data if Task B va...

  • 2121 Views
  • 3 replies
  • 0 kudos
Latest Reply
hendrykarlar
New Contributor II
  • 0 kudos

 Implementing conditional logic in Databricks using Terraform involves setting up tasks and condition checks between them. Here's how you can structure your Terraform code to achieve the desired workflow:Step 1: Define Databricks Notebooks as TasksAs...

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NCat
by New Contributor III
  • 12027 Views
  • 7 replies
  • 3 kudos

How can I start SparkSession out of Notebook?

Hi community,How can I start SparkSession out of Notebook?I want to split my Notebook into small Python modules, and I want to let some of them to call Spark functionality.

  • 12027 Views
  • 7 replies
  • 3 kudos
Latest Reply
jacovangelder
Honored Contributor
  • 3 kudos

Just overtake Databricks sparksession.from pyspark.sql import SparkSession spark = SparkSession.getActiveSession()

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6 More Replies
amartinez
by New Contributor III
  • 4611 Views
  • 6 replies
  • 5 kudos

Workaround for GraphFrames not working on Delta Live Table?

According to this page, the GraphFrames package is included in the databricks runtime since at least 11.0. However trying to run a connected components algorithm inside a delta live table notebook yields the error java.lang.ClassNotFoundException: or...

  • 4611 Views
  • 6 replies
  • 5 kudos
Latest Reply
lprevost
Contributor
  • 5 kudos

I'm also trying to use GraphFrames inside a DLT pipeline.   I get an error that graphframes not installed in the cluster.   i"m using it successfully in test notebooks using the ML version of the cluster.  Is there a way to use this inside a DLT job?

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