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Data Engineering
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Forum Posts

isaac_gritz
by Valued Contributor II
  • 1081 Views
  • 1 replies
  • 2 kudos

Change Data Capture with Databricks

How to leverage Change Data Capture (CDC) from your databases to DatabricksChange Data Capture allows you to ingest and process only changed records from database systems to dramatically reduce data processing costs and enable real-time use cases suc...

  • 1081 Views
  • 1 replies
  • 2 kudos
Latest Reply
prasad95
New Contributor III
  • 2 kudos

Hi, @isaac_gritz can you provide any reference resource to achieve the AWS DynamoDB CDC to Delta Tables.Thank You,

  • 2 kudos
Anonymous
by Not applicable
  • 6654 Views
  • 9 replies
  • 13 kudos

Resolved! MetadataChangedException

A delta lake table is created with identity column and I'm not able to load the data parallelly from four process. i'm getting the metadata exception error.I don't want to load the data in temp table . Need to load directly and parallelly in to delta...

  • 6654 Views
  • 9 replies
  • 13 kudos
Latest Reply
Anonymous
Not applicable
  • 13 kudos

Thanks @Hubert Dudek​ 

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pvignesh92
by Honored Contributor
  • 510 Views
  • 1 replies
  • 3 kudos

lnkd.in

Databricks Auto Loader is an interesting feature that can be used to load data incrementally.✳ It can process new data files as they arrive in the cloud object stores✳ It can be used to ingest JSON, CSV, PARQUET, AVRO, ORC, TEXT and even Binary file ...

  • 510 Views
  • 1 replies
  • 3 kudos
Latest Reply
Ajay-Pandey
Esteemed Contributor II
  • 3 kudos

Thanks for sharing

  • 3 kudos
Hunter1604
by New Contributor II
  • 3007 Views
  • 5 replies
  • 0 kudos

How to remove checkpoints from DeltaLake table ?

How to remove checkpoints from DeltaLake table ?I see that on my delta table exist a few checkpoints I want to remove the oldest one. It seems that existing of it is blocking removing the oldest _delta_logs entries

  • 3007 Views
  • 5 replies
  • 0 kudos
Latest Reply
Anonymous
Not applicable
  • 0 kudos

Hi @Pawel Woj​ Hope everything is going great.Just wanted to check in if you were able to resolve your issue. If yes, would you be happy to mark an answer as best so that other members can find the solution more quickly? If not, please tell us so we ...

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rami-lv
by New Contributor II
  • 1505 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...

  • 1505 Views
  • 3 replies
  • 3 kudos
Latest Reply
Ajay-Pandey
Esteemed Contributor II
  • 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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isaac_gritz
by Valued Contributor II
  • 656 Views
  • 1 replies
  • 3 kudos

Connecting Applications and BI Tools to Databricks SQL

Access Data in Databricks Using an Application or your Favorite BI ToolYou can leverage Partner Connect for easy, low-configuration connections to some of the most popular BI tools through our optimized connectors. Alternatively, you can follow these...

  • 656 Views
  • 1 replies
  • 3 kudos
Latest Reply
Kaniz
Community Manager
  • 3 kudos

Thank you, @Isaac Gritz​ , for sharing this fantastic post!

  • 3 kudos
Dicer
by Valued Contributor
  • 9932 Views
  • 13 replies
  • 13 kudos

Resolved! Failed to convert Spark.sql to Pandas Dataframe using .toPandas()

I wrote the following code:​data = spark.sql (" SELECT A_adjClose, AA_adjClose, AAL_adjClose, AAP_adjClose, AAPL_adjClose FROM deltabase.a_30min_delta, deltabase.aa_30min_delta, deltabase.aal_30min_delta, deltabase.aap_30min_delta ,deltabase.aapl_30m...

  • 9932 Views
  • 13 replies
  • 13 kudos
Latest Reply
Dicer
Valued Contributor
  • 13 kudos

I just discovered a solution.Today, I opened Azure Databricks. When I imported python libraries. Databricks told me that toPandas() was deprecated and it suggested me to use toPandas.The following solution works: Use toPandas instead of toPandas() da...

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Autel
by New Contributor II
  • 2011 Views
  • 4 replies
  • 1 kudos

Resolved! concurrent update to same hive or deltalake table

HI, I'm interested to know if multiple executors to append the same hive table using saveAsTable or insertInto sparksql. will that cause any data corruption? What configuration do I need to enable concurrent write to same hive table? what about the s...

  • 2011 Views
  • 4 replies
  • 1 kudos
Latest Reply
Kaniz
Community Manager
  • 1 kudos

Hi @Weide Zhang​ , Does @[werners] (Customer)​ 's reply answer your question?

  • 1 kudos
3 More Replies
MadelynM
by New Contributor III
  • 298 Views
  • 0 replies
  • 1 kudos

vimeo.com

Auto Loader provides Python and Scala methods to ingest new data from a folder location into a Delta Lake table by using directory listing or file notifications. Here's a quick video (7:00) on how to use Auto Loader for Databricks on AWS with Databri...

  • 298 Views
  • 0 replies
  • 1 kudos
Data_Bricks1
by New Contributor III
  • 1787 Views
  • 7 replies
  • 0 kudos

data from 10 BLOB containers and multiple hierarchical folders(every day and every hour folders) in each container to Delta lake table in parquet format - Incremental loading for latest data only insert no updates

I am able to load data for single container by hard coding, but not able to load from multiple containers. I used for loop, but data frame is loading only last container's last folder record only.Here one more issue is I have to flatten data, when I ...

  • 1787 Views
  • 7 replies
  • 0 kudos
Latest Reply
Hubert-Dudek
Esteemed Contributor III
  • 0 kudos

for sure function (def) should be declared outside loop, move it after importing libraries,logic is a bit complicated you need to debug it using display(Flatten_df2) (or .show()) and validating json after each iteration (using break or sleep etc.)

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User16783853906
by Contributor III
  • 1459 Views
  • 2 replies
  • 0 kudos

VACUUM during read/write

Is it safe to run VACUUM on a Delta Lake table while data is being added to it at the same time?  Will it impact the job result/performance?

  • 1459 Views
  • 2 replies
  • 0 kudos
Latest Reply
User16783853906
Contributor III
  • 0 kudos

In the vast majority of cases, yes, it is safe to run VACUUM while data is concurrently being appended or updated to the same table. This is because VACUUM deletes data files no longer referenced by a Delta table's transaction log and does not effect...

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User16826994223
by Honored Contributor III
  • 227 Views
  • 0 replies
  • 0 kudos

databricks.com

Can I create a Delta Lake table on Databricks and query it with open-source Spark?Yes, in order to do this, you would install Open Source Spark and Delta Lake, both are open source. Delta Engine, which is only available on Databricks, will make delta...

  • 227 Views
  • 0 replies
  • 0 kudos
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