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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

rami-lv
by • New Contributor II
  • 6531 Views
  • 3 replies
  • 3 kudos

What gets overridden when writing overriding a delta lake table?

I just tried to write to a delta lake table using override mode, and I found that history is reserved. It's unclear to me how the data is overridden, and how long the history could be preserved. As they say, a code is better than a thousand words: my...

  • 6531 Views
  • 3 replies
  • 3 kudos
Latest Reply
Ajay-Pandey
Databricks MVP
  • 3 kudos

Hi @Rami ALZEBAK​ overwrite means first it will remove the data and again it will write the whole data.If you want to see history use can use DESCRIBE HISTORY command

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Chris_Shehu
by • Valued Contributor III
  • 2559 Views
  • 1 replies
  • 2 kudos

What are the options for extracting data from the delta lake for a vendor?

Our vendor is looking to use Microsoft API Manager to retrieve data from a variety of sources. Is it possible to extract records from the delta lake by using an API?What I've tried:I reviewed the available databricks API's it looks like most of them ...

  • 2559 Views
  • 1 replies
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Latest Reply
Chris_Shehu
Valued Contributor III
  • 2 kudos

Another possibility for this potentially is to stand up a cluster and have a notebook running flask to create an API interface. I'm still looking into options, but it seems like there should be a baked in solution besides the JDBC connector. I'm not ...

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gauthamchettiar
by • New Contributor II
  • 3727 Views
  • 0 replies
  • 1 kudos

Spark always performing broad casts irrespective of spark.sql.autoBroadcastJoinThreshold during streaming merge operation with DeltaTable.

I am trying to do a streaming merge between delta tables using this guide - https://docs.delta.io/latest/delta-update.html#upsert-from-streaming-queries-using-foreachbatchOur Code Sample (Java): Dataset<Row> sourceDf = sparkSession ...

BroadCastJoin 1M
  • 3727 Views
  • 0 replies
  • 1 kudos
same213
by • New Contributor III
  • 7901 Views
  • 4 replies
  • 8 kudos

Is it possible to create a sqlite database and export it?

I am trying to create a sqlite database in databricks and add a few tables to it. Ultimately, I want to export this using Azure. Is this possible?

  • 7901 Views
  • 4 replies
  • 8 kudos
Latest Reply
same213
New Contributor III
  • 8 kudos

@Hubert Dudek​  We currently have a process in place that reads in a SQLite file. We recently transitioned to using Databricks. We were hoping to be able to create a SQLite file so we didn't have to alter the current process we have in place.

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URJ24
by • Databricks Partner
  • 5003 Views
  • 3 replies
  • 1 kudos

I have attended Data + AI World Tour Asia Pacific this week but did not received post confirmation email.

I have attended Data + AI World Tour Asia Pacific this week but did not received post confirmation email. After webinar I received short survey and then thank you note for participation. But unexpectedly did not received any email with feedback link ...

  • 5003 Views
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  • 1 kudos
Latest Reply
URJ24
Databricks Partner
  • 1 kudos

Emailing apacevents@databricks.com helped.

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antonyj453
by • New Contributor II
  • 5331 Views
  • 1 replies
  • 3 kudos

How to extract JSON object from a pyspark data frame. I was able to extract data from another column which in array format using "Explode" function, but Explode is not working for Object type. Its returning with type mismatch error.

I have tried below code to extract data which in Array:df2 = df_deidentifieddocuments_tst.select(F.explode('annotationId').alias('annotationId')).select('annotationId.$oid')It was working fine.. but,its not working for JSON object type. Below is colu...

CreateaAT
  • 5331 Views
  • 1 replies
  • 3 kudos
Latest Reply
UmaMahesh1
Honored Contributor III
  • 3 kudos

Did you try extracting that column data using from_json function ?

  • 3 kudos
gpzz
by • New Contributor III
  • 4091 Views
  • 1 replies
  • 3 kudos

pyspark code error

rdd4 = rdd3.reducByKey(lambda x,y: x+y)AttributeError: 'PipelinedRDD' object has no attribute 'reducByKey'Pls help me out with this

  • 4091 Views
  • 1 replies
  • 3 kudos
Latest Reply
UmaMahesh1
Honored Contributor III
  • 3 kudos

Is it a typo or are you really using reducByKey instead of reduceByKey ?

  • 3 kudos
Axserv
by • New Contributor II
  • 5590 Views
  • 4 replies
  • 1 kudos

How do I "Earn 100 points to the Databricks Community Rewards Store" ? (As advertised on Databricks Academy)

Hello, how do I join the Databricks Community study group for 100points, as advertised on the Databricks Academy website?

image
  • 5590 Views
  • 4 replies
  • 1 kudos
Latest Reply
Harun
Honored Contributor
  • 1 kudos

@Alex Serlovsky​ You need to earn the lakehouse fundamental credetial certification, then you can join this community group. Within 24 to 48 hours you will get 100 reward points. But As per databricks, you need to earn the credential on or before Nov...

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Dave_Nithio
by • Contributor II
  • 2645 Views
  • 0 replies
  • 1 kudos

Natively Query Delta Lake with R

I have a large delta table that I need to analyze in native R. The only option I have currently is to query the delta table then use collect() to bring that spark dataframe into an R dataframe. Is there an alternative method that would allow me to qu...

  • 2645 Views
  • 0 replies
  • 1 kudos
lawrence009
by • Contributor
  • 5651 Views
  • 4 replies
  • 4 kudos

Cannot CREATE TABLE with 'No Isolation Shared' cluster

Recently I ran into a number issues running with our notebooks in Interactive Mode. For example, we can't create (delta) table. The command would run and then idle for no apparent exception. The path is created on AWS S3 but delta log is never create...

  • 5651 Views
  • 4 replies
  • 4 kudos
Latest Reply
youssefmrini
Databricks Employee
  • 4 kudos

The Admin can disable the possibility to use the no Isolate Shared cluster. I recommend you to switch to Single user where UC is activated. Don't worry you won't need to change your code. If you encounter this kind of issues, make sure to open a tick...

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Hunter
by • New Contributor III
  • 27956 Views
  • 7 replies
  • 6 kudos

Resolved! How to programmatically download png files from matplotlib plots in notebook?

I am creating plots in databricks using python and matplotlib. These look great in notebook and I can save them to the dbfs usingplt.savefig("/dbfs/FileStore/tables/[plot_name].png")I can then download the png files to my computer individually by pas...

  • 27956 Views
  • 7 replies
  • 6 kudos
Latest Reply
Hunter
New Contributor III
  • 6 kudos

Thanks everyone! I am already at a place where I can download a png to FileStore and use a url to download that file locally. What I was wondering was if there is some databricks function I can use to launch the url that references the png file and d...

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successhawk
by • New Contributor II
  • 4187 Views
  • 3 replies
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Resolved! Is there a way to tell if a created job is not compliant against configured cluster policies before it runs?

As a DevOps engineer, I want to enforce cluster policies at deployment time when the job is deployed/created, well before it is time to actually use it (i.e. before its scheduled/triggered run time without actually running it).

  • 4187 Views
  • 3 replies
  • 2 kudos
Latest Reply
irfanaziz
Contributor II
  • 2 kudos

Is it not the linked service that defines the kind of cluster created or used for any job?So i believe you could control the configuration via the linked service settings.

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labtech
by • Valued Contributor II
  • 3461 Views
  • 3 replies
  • 20 kudos

Resolved! Create Databricks Workspace with different email address on Azure

Hi team,I wonder if we can create a Databricks Workspace that not releated with Azure email address.Thanks

  • 3461 Views
  • 3 replies
  • 20 kudos
Latest Reply
Aviral-Bhardwaj
Esteemed Contributor III
  • 20 kudos

yes , i have done this multiple time

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labtech
by • Valued Contributor II
  • 3320 Views
  • 3 replies
  • 14 kudos

Get a new badge or new certified for version 3 of DE exam

I took a certified of DE exam (version 2). Do I receive a new badge or certified when I pass newest version of DE exam?I'm going to take that and review my knowlege.

  • 3320 Views
  • 3 replies
  • 14 kudos
Latest Reply
Ajay-Pandey
Databricks MVP
  • 14 kudos

Hi @Gam Nguyen​ I think there is no new badge for this one

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