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Start your journey with Databricks by joining discussions on getting started guides, tutorials, and introductory topics. Connect with beginners and experts alike to kickstart your Databricks experience.
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Forum Posts

JordiDekker
by New Contributor III
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ClassCastException when attempting to timetravel (databricks-connect)

Hi all,Using databricks-connect 11.3.19, I get an "java.lang.ClassCastException" when attempting to timetravel. The exact same statement works fine when executed in the databricks GUI directly. Any ideas on what's going on? Is this a known limitation...

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SusanaD
New Contributor II
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Did you find a solution?

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kartik-chandra
by New Contributor III
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Resolved! Spark read with format as "delta" isn't working with Java multithreading

0I have a Spark application (using Java library) which needs to replicate data from one blob storage to another. I have created a readStream() within it which is listening continuously to a Kafka topic for incoming events. The corresponding writeStre...

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kartik-chandra
New Contributor III
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The problem was indeed with the way ClassLoader was being set in the ForkJoinPool (common Pool used) thread. Spark in SparkClassUtils uses Thread.currentThread().getContextClassLoader which might behave differently in another thread.To solve it I cre...

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vrajesh123
by New Contributor II
  • 6195 Views
  • 1 replies
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Webassessor Secure Browser will not Launch during exam.

Hello - I registered for the Databricks Data Engineering Associate Certification exam.  I hit an issue, their Secure browser would not launch, it just crashed - the only thing I could see in a flash is "bad request" and poof its gone.  Spend over 2 h...

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Secure Browser
  • 6195 Views
  • 1 replies
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A1459
by New Contributor
  • 1341 Views
  • 0 replies
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Execute delete query from notebook on azure synapse

Hello Everyone, Is there a way we can execute the delete query from azure notebook on azure synapse database.I tried using read api method with option "query" but getting error like jdbc connector not able to handle code.Can any suggest how we can de...

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sudhanshu1
by New Contributor III
  • 9651 Views
  • 2 replies
  • 2 kudos

Python file testing using pytest

Hi All,I have a requirement in my project, where we will be writing some python code inside databricks . Please note we will not be using pyspark . It will plain pythin with polars.I am looking into ho to create test files for main file. Below is sim...

  • 9651 Views
  • 2 replies
  • 2 kudos
Sujitha
by Databricks Employee
  • 11562 Views
  • 1 replies
  • 5 kudos

New how-to guide to data warehousing with the Data Intelligence Platform

Just launched: The Big Book of Data Warehousing and BI, a new hands-on guide focused on real-world use cases from governance, transformation, analytics and AI.As the demand for data becomes insatiable in every company, the data infrastructure has bec...

Screenshot 2023-12-05 at 11.04.08 AM.png
  • 11562 Views
  • 1 replies
  • 5 kudos
Latest Reply
Edward3
New Contributor II
  • 5 kudos

lol beans It used to take me a long time to regain my equilibrium, but recently I learned that a website really leads this layout when you may find delight after a stressful day here. Since then, I've been able to find my equilibrium much more quickl...

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pablobd
by Contributor II
  • 3297 Views
  • 1 replies
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Asset bundle build and deploy python wheel with versions

Hi all,I was able to deploy a wheel to the /Shared/ folder from a repository in Gitlab with asset bundles. The databricks.yml looks something like this.artifacts:  default:    type: whl    build: poetry build    path: .  targets:    workspace:      h...

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pablobd
Contributor II
  • 0 kudos

Finally I decided to use AWS Code Artifact and mirror the PyPI, which I think it's a bit cleaner. But your solution looks good too. Thanks!

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invalidargument
by New Contributor III
  • 1736 Views
  • 1 replies
  • 2 kudos

Create new workbooks with code

Is is possible to create new notebooks from a notevbook in databricks? I have tried this code. But all of them are generic files, not notebooks.notebook_str = """# Databricks notebook source import pyspark.sql.functions as F import numpy as np # CO...

  • 1736 Views
  • 1 replies
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invalidargument
New Contributor III
  • 2 kudos

Unfortunaly %run does not help me since I can't %run a .py file. I still need my code in notebooks.I am transpiling propriatary code to python using jinja templates. I would like to have the output as notebooks since those are most convenient to edit...

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SamGreene
by Contributor II
  • 2595 Views
  • 1 replies
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Resolved! DLT Pipeline Graph is not detecting dependencies

Hi,This is my first databricks project.  I am loading data from a UC external volume in ADLS into tables and then split one of the tables into two tables based on a column.  When I create a pipeline, the tables don't have any dependencies and this is...

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Latest Reply
SamGreene
Contributor II
  • 0 kudos

While re-implementing my pipeline to publish to dev/test/prod instead of bronze/silver/gold, I think I found the answer.  The downstream tables need to use the LIVE schema. 

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SamGreene
by Contributor II
  • 2315 Views
  • 1 replies
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Unpivoting data in live tables

I am loading data from CSV into live tables.  I have a live delta table with data like this:WaterMeterID, ReadingDateTime1, ReadingValue1, ReadingDateTime2, ReadingValue2It needs to be unpivoted into this:WaterMeterID, ReadingDateTime1, ReadingValue1...

  • 2315 Views
  • 1 replies
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leelee3000
by Databricks Employee
  • 2408 Views
  • 2 replies
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time travel with DLT

Needed some help with Time Travel with Delta Live tables   We were trying to figure out if we can go in and alter the history on this table, and what would happen to data that we mass upload?  By this we mean we have data from the past that we would ...

  • 2408 Views
  • 2 replies
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Latest Reply
Louis_Frolio
Databricks Employee
  • 0 kudos

Delta Live Tables leverage Delta Lake, or Delta Tables.  Delta tables, through transactions (e.g. insert, update, delete, merges, optimization) create versions of said Delta Table.  Once a version is created it cannot be altered, it is immutable.  Yo...

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Phani1
by Databricks MVP
  • 2191 Views
  • 1 replies
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Upgrade Spark version 3.2 to 3.4+

Hi Team,We would like to upgrade from Spark version 3.2 to 3.4+ (Databricks Runtime - 10.4 to 12.2/13.3)We would like to understand how complex upgradation is this and challenges which we face? what are the technical steps and precautions we need to ...

  • 2191 Views
  • 1 replies
  • 0 kudos

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