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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

Akshay_Petkar
by Valued Contributor
  • 403 Views
  • 1 replies
  • 3 kudos

Resolved! How to send automated emails from Databricks notebooks based on conditions or events?

Hi everyone,I’m currently exploring how to replicate something similar to Alteryx Email Activity within Databricks.Basically, I want to send automated emails to specific users when certain conditions or events occur in a notebook workflow  for exampl...

  • 403 Views
  • 1 replies
  • 3 kudos
Latest Reply
HariSankar
Contributor III
  • 3 kudos

Hey @Akshay_Petkar ,This is something a lot of people try to do when they move workflows from Alteryx or SSIS into Databricks. There isn’t a direct “Email Activity” node like in Alteryx, but you candefinitely set up automated email notifications in a...

  • 3 kudos
Anonymous
by Not applicable
  • 5837 Views
  • 7 replies
  • 5 kudos

COPY INTO command can not recognise MAP type value from JSON file

I have a delta table in Databricks with single column of type map<string, string> and I have a data file in JSON format created by Hive 3 for the table with thecolumn of same type. And I want to load data from file to Databricks's table using COPY IN...

  • 5837 Views
  • 7 replies
  • 5 kudos
Latest Reply
Y-I
New Contributor II
  • 5 kudos

Usefrom_json(to_json({struct column}),{your schema definition})For exampleCOPY INTO {table} FROM (select from_json(to_json()), 'MAP<STRING, STRING>' FROM {path}) ... 

  • 5 kudos
6 More Replies
Abdul_Alikhan
by New Contributor II
  • 1053 Views
  • 4 replies
  • 2 kudos

Resolved! in data bricks free edition Serverless compute is not working

I recently logged into the Databricks free edition, but the serverless compute is not working. I'm receiving the error: 'An error occurred while trying to attach serverless compute. Please try again or contact support.'"

  • 1053 Views
  • 4 replies
  • 2 kudos
Latest Reply
LonaOsmani
New Contributor III
  • 2 kudos

Hi @Abdul_Alikhan ,I experienced the same yesterday when I imported some of my notebooks. I noticed that this error only appeared for imported notebooks because the environment version was 1 by default. Changing the environment version to 2 solved th...

  • 2 kudos
3 More Replies
MarkV
by New Contributor III
  • 1127 Views
  • 3 replies
  • 0 kudos

DLT Runtime Values

When my pipeline runs, I have a need to query a table in the pipeline before I actually create another table. I need to know the target catalog and target schema for the query. I figured the notebook might run automatically in the context of the cata...

  • 1127 Views
  • 3 replies
  • 0 kudos
Latest Reply
SparkJun
Databricks Employee
  • 0 kudos

can you set up notebook parameters and pass them in the DLT pipeline? https://docs.databricks.com/en/jobs/job-parameters.html

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2 More Replies
pokus
by New Contributor III
  • 9550 Views
  • 3 replies
  • 2 kudos

Resolved! use DeltaLog class in databricks cluster

I need to use DeltaLog class in the code to get the AddFiles dataset. I have to keep the implemented code in a repo and run it in databricks cluster. Some docs say to use org.apache.spark.sql.delta.DeltaLog class, but it seems databricks gets rid of ...

  • 9550 Views
  • 3 replies
  • 2 kudos
Latest Reply
NandiniN
Databricks Employee
  • 2 kudos

Hi @pokus ,  You don't need to access via reflection.  You can Access DeltaLog with spark._jvm:Unity Catalog and DeltaLake tables expose their metadata and transaction log via the JVM backend. Using spark._jvm, you can interact with DeltaLog Thanks!

  • 2 kudos
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Nasd_
by New Contributor II
  • 1030 Views
  • 3 replies
  • 2 kudos

Resolved! Accessing DeltaLog and OptimisticTransaction from PySpark

Hi community,I'm exploring ways to perform low-level, programmatic operations on Delta tables directly from a PySpark environment.The standard delta.tables.DeltaTable Python API is excellent for high-level DML, but it seems to abstract away the core ...

  • 1030 Views
  • 3 replies
  • 2 kudos
Latest Reply
NandiniN
Databricks Employee
  • 2 kudos

For accessing the Databricks pre-installed package's use spark._jvm.com.databricks.sql.transaction.tahoe.DeltaLog  org.apache.spark.sql.delta.DeltaLog would be the OSS jar's classname.  

  • 2 kudos
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Nasd_
by New Contributor II
  • 2202 Views
  • 1 replies
  • 1 kudos

Resolved! Unable to load org.apache.spark.sql.delta classes from JVM pyspark

Hello,I’m working on Databricks with a cluster running Runtime 16.4, which includes Spark 3.5.2 and Scala 2.12.For a specific need, I want to implement my own custom way of writing to Delta tables by manually managing Delta transactions from PySpark....

  • 2202 Views
  • 1 replies
  • 1 kudos
Latest Reply
NandiniN
Databricks Employee
  • 1 kudos

Hi @Nasd_,  I believe you are trying to use OSS jars on DBR. (Can infer based on class package) org.apache.spark.sql.delta.DeltaLog The error ModuleNotFoundError: No module named 'delta.exceptions.captured'; 'delta.exceptions' is not a package can be...

  • 1 kudos
LeoRickli
by New Contributor II
  • 991 Views
  • 2 replies
  • 0 kudos

Databricks Asset Bundles fails deploy but works on the GUI with same parameters

I'm running into an issue when running databricks bundle deploy when using job clusters.When I run databricks bundle deploy on a new workspace or after destroying previous resources, the deployment fails with the error: Error: cannot update job: At l...

  • 991 Views
  • 2 replies
  • 0 kudos
Latest Reply
NandiniN
Databricks Employee
  • 0 kudos

Hello @LeoRickli  Are you setting apply_policy_default_values? https://docs.databricks.com/en/administration-guide/clusters/policies.html#:~:text=Default%20values%20don't%20automatically,not%20needed%20for%20fixed%20policies. After you update a polic...

  • 0 kudos
1 More Replies
benesq
by New Contributor
  • 1697 Views
  • 1 replies
  • 1 kudos

Resolved! JDBC driver uses Unsafe API, which will be completely deprecated in a future release of Java

Using JDBC driver (2.7.3) in OpenJDK 24 gives the following warning:WARNING: A terminally deprecated method in sun.misc.Unsafe has been called WARNING: sun.misc.Unsafe::arrayBaseOffset has been called by com.databricks.client.jdbc42.internal.apache.a...

  • 1697 Views
  • 1 replies
  • 1 kudos
Latest Reply
NandiniN
Databricks Employee
  • 1 kudos

Hey @benesq ,  For JDBC driver 2.7.4 https://www.databricks.com/spark/jdbc-drivers-download should be used with Java Runtime Environment (JRE) 8.0, 11.0 or 21.0. As mentioned in the installation doc "Each machine where you use the Databricks JDBC Dri...

  • 1 kudos
AlbertWang
by Valued Contributor
  • 4131 Views
  • 7 replies
  • 3 kudos

Resolved! Azure Databricks Unity Catalog - cannot access managed volume in notebook

We have set up Azure Databricks with Unity Catalog (Metastore).Used Managed Identity (Databricks Access Connector) for connection from workspace(s) to ADLS Gen2ADLS Gen2 storage account has Storage Blob Data Contributor and Storage Queue Data Contrib...

  • 4131 Views
  • 7 replies
  • 3 kudos
Latest Reply
fifata
New Contributor II
  • 3 kudos

@AlbertWang @VAMSaha22 Since you want private connectivity I assume you have a vnet and a PE associated with the gen2 account. That PE needs to have a sub-resource of type dfs when the storage account is gen2/hierarchical namespace. You might want to...

  • 3 kudos
6 More Replies
Mildred
by New Contributor
  • 1946 Views
  • 1 replies
  • 0 kudos

Resolved! Parameter "expand_tasks" on List job runs request seams not to be working (databricsk api)

I'm setting it as True, but it doesn't return the cluster_instance info. Here is the function I'm using:def get_job_runs(job_id): """ Fetches job runs for a specific job from Databricks Jobs API. """ headers = { "Authorization...

  • 1946 Views
  • 1 replies
  • 0 kudos
Latest Reply
Krishna_S
Databricks Employee
  • 0 kudos

Hi @Mildred  The way you passed the data for the expand_tasks parameter is wrong: data = { data = { "job_id": job_id, "expand_tasks": "true" } It should not be passed as Python boolean values, but as a string "true" or "false" Once you do that will...

  • 0 kudos
DiskoSuperStar
by New Contributor
  • 222 Views
  • 1 replies
  • 0 kudos

DLT Flow Redeclaration Error After Service Upgrade

Hi, our delta live tables(Lakeflow declarative pipelines) pipeline started failing after the Sep 30 / Oct 1 service upgrade with the following error :AnalysisException: Cannot have multiple queries named `<table_name>_realtime_flow` for `<table_name>...

  • 222 Views
  • 1 replies
  • 0 kudos
Latest Reply
saurabh18cs
Honored Contributor II
  • 0 kudos

Hi @DiskoSuperStar IT seems you’ve run into a recently enforced change in Databricks DLT/Lakeflow:Multiple flows (append or otherwise) targeting the same table must have unique names. actually it looks correct on your code. Check if your  table_info ...

  • 0 kudos
Gvnreddy
by New Contributor II
  • 416 Views
  • 3 replies
  • 4 kudos

Need Help to learn scala

Hi Enthusiasts, recently i joined company in that company they used to develope databricks notebook with Scala programming language perviously, i worked on Pyspark it was very easy for me by the way i have 3 years of experence in DE i need help to wh...

  • 416 Views
  • 3 replies
  • 4 kudos
Latest Reply
-werners-
Esteemed Contributor III
  • 4 kudos

fwiw: you do not have to be a scala wiz to work on spark in scala.Older spark articles are often about scala in spark (before python took over).You will notice it is a lot like pyspark, but way way better.  typing, immutability, things like leftfold ...

  • 4 kudos
2 More Replies
john77
by New Contributor II
  • 613 Views
  • 5 replies
  • 1 kudos

Why ETL Pipelines and Jobs

I do notice that ETL Pipelines let's you run declarative SQL syntax such as DLT tables but you can do the same with Jobs if you use SQL as your task type. So why and when to use ETL Pipelines?

  • 613 Views
  • 5 replies
  • 1 kudos
Latest Reply
saurabh18cs
Honored Contributor II
  • 1 kudos

Hi @john77 SQL Task Type : Simple, one-off SQL operations or batch jobs + you need to orchestrate a mix of notebooks, Python/Scala code, and SQL in a single workflowLakeflow Declarative Pipelines : Complex , production ETL jobs requires lineage , mon...

  • 1 kudos
4 More Replies
DivyaKumar
by New Contributor
  • 186 Views
  • 1 replies
  • 0 kudos

Databricks to Dataverse migration via ADF copy data

Hi team,I need to load data from databricks delta tables to dataverse tables and I have one unique id column which I am ensuring via mapping. Its datatype is GUID in dataverse and string in delta table. I ensured that column holds unique values. Sinc...

  • 186 Views
  • 1 replies
  • 0 kudos
Latest Reply
-werners-
Esteemed Contributor III
  • 0 kudos

That is not a valid guid.Dataverse will check this.http://guid.us/test/guid

  • 0 kudos

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