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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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lena1
by • New Contributor
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Resource exhaustion when using default apply_changes python functionality

Hello!We are currently setting up streaming  CDC pipelines for more than 500 tables. Due to the high number of tables, we split our tables into multiple pipelines, we use multiple DLT pipelines per layer: bronze, silver goldIn silver, we only upsert ...

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Wojciech_BUK
Valued Contributor III
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Hi Lena1,there is no magic behind the scene.If you write readstream from bronze table and writestream with ForEachBatch(function) and in function you will write MERGE stattemnt this will have similiar performance.Maybe there is a lot of shuffeling ha...

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Long_Tran
by • New Contributor
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Can job 'run_as' be assigned to users/principals who actually run it?

Can job 'run_as' be assigned to users/principals who actually run it? instead of always a fixed creator/user/pricipal?When a job is run, I would like to see in the job setting "run_as" the name of the actual user/principal who runs it.Currently, "run...

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Wojciech_BUK
Valued Contributor III
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This is not avaliable in Workflow/Jobs.Job should newer be run as person who is executing the job, especialy in Production.The reason is that the output might be not the same, base on person who is running the job (e.g. diffrent Row Level Access). If...

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esauesp_co
by • New Contributor III
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Resolved! My jobs and cluster were deleted in a suspicious way

I want to know what happen with my cluster and if I can recover it.I entered to my Databricks account and I didn't found my jobs and my cluster. I couldn't find any log of the deleted cluster because the log is into the cluster interface. I entered t...

Data Engineering
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Sid_databricks
New Contributor II
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Dear folks,When the tables has been deleted, then why I am unable to create the table with same name.It continiously giving me error"DeltaAnalysisException: Cannot create table ('`spark_catalog`.`default`.`Customer_Data`'). The associated location ('...

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feed
by • New Contributor III
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TesseractNotFoundError

TesseractNotFoundError: tesseract is not installed or it's not in your PATH. See README file for more information. in databricks

Data Engineering
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neha_ayodhya
New Contributor II
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%sh apt-get install -y tesseract-ocr this command is not working in my new Databricks free trail account, earlier it worked fine in my old Databricks instance. I get below error: E: Could not open lock file /var/lib/dpkg/lock-frontend - open (13: Per...

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MattPython
by • New Contributor
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How do you read files from the DBFS with OS and Pandas Python libraries?

I created translations for decoded values and want to save the dictionary object the DBFS for mapping. However, I am unable to access the DBFS without using dbutils or PySpark library. Is there a way to access the DBFS with OS and Pandas Python libra...

image.png image image image
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User16789202230
Databricks Employee
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db_path = 'file:///Workspace/Users/l<xxxxx>@databricks.com/TITANIC_DEMO/tested.csv' df = spark.read.csv(db_path, header = "True", inferSchema="True")

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shagun
by • New Contributor III
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Resolved! Delta live tables target schema

The first time i run my delta live table pipeline after setup, I get this error on starting it :-------------------------------------org.apache.spark.sql.catalyst.parser.ParseException: Possibly unquoted identifier my-schema-name detected. Please con...

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BenTendo
New Contributor II
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This still errors on internal databricks spark/python code likedeltaTable.history()@shagun wrote:The first time i run my delta live table pipeline after setup, I get this error on starting it :-------------------------------------org.apache.spark.sql...

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ashdam
by • New Contributor III
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Databricks asset bundles use cluster depending on target (environment) is possible?

Here is my bundle definition  Spoiler# This is a Databricks asset bundle definition for my_project.# See https://docs.databricks.com/dev-tools/bundles/index.html for documentation.experimental:   python_wheel_wrapper: truebundle:  name: my_projectinc...

Data Engineering
Databricks Asset Bundles
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Nastasia
by • New Contributor II
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Why is Spark creating multiple jobs for one action?

I noticed that when launching this bunch of code with only one action, I have three jobs that are launched.from pyspark.sql import DataFrame from pyspark.sql.types import StructType, StructField, StringType from pyspark.sql.functions import avgdata:...

https___i.stack.imgur.com_xfYDe.png LTHBM DdfHN
Data Engineering
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RKNutalapati
Valued Contributor
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The above code will create two jobs.JOB-1. dataframe: DataFrame = spark.createDataFrame(data=data,schema=schema)The createDataFrame function is responsible for inferring the schema from the provided data or using the specified schema.Depending on the...

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bathulaj
by • New Contributor
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NonDeterministic UDF's making multiple invocations

Hi,Even after defining my UDF's as nonDeterministic like in here ..testUDF = udf(testMthod, StringType()).asNondeterministic()is still making multiple invocations. Is there any thing that I am missing here ?TIA,-John B

Data Engineering
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famous_jt33
by • New Contributor
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SQL UDFs for DLT pipelines

I am trying to implement a UDF for a DLT pipeline. I have seen the documentation stating that it is possible but I am getting an error after adding an SQL UDF to a cell in the notebook attached to the pipeline. The aim is to have the UDF in a separat...

Data Engineering
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6502
New Contributor III
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You can't. The SQL support on DLT pipeline cluster is limited compared to a normal notebook. You can still define a UDF in Python using, of course, a Python notebook. In this case, you can use the spark.sql() function to execute your original SQL cod...

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sher
by • Valued Contributor II
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how do we use delta sharing between databricks to snowflake

Hi all,Is there any way to implement delta sharing in databricks to snowflake direct connect ?

Data Engineering
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NateAnth
Databricks Employee
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I don't think that Snowflake has implemented the ability to read from a table via Delta Sharing as of December 2023. Please reach out to your Snowflake representatives and urge them to consider this feature from their side.  Alternatively, you can qu...

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PrasSabb_97245
by • New Contributor II
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AWS S3 External Location Size in Unity Catalog

Hi,I am trying to get the raw size (total size)  of delta table. I could get delta table size from DeltaTable api but that gives only latest version size. I need to find the actual S3 size the tables takes on S3.Is there any way, to find the S3 size ...

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PrasSabb_97245
New Contributor II
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Hi Kaniz,Thank you for your suggestions. As per my understanding, the "snapshot.sizeInBytes" gives only current snapshot size. But I am looking for total size (all versions) of the table on S3.  

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erigaud
by • Honored Contributor
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The operation CHANGE DATA FEED is not allowed on Streaming Tables.

Hello everyone,I have a workflow that starts by reading the CDF data for a change data feed.The syntax is exactly the following : (spark.readStream  .format("delta")  .option("readChangeFeed", "true")   .option("startingVersion", 10)   .table("my.str...

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afk
New Contributor III
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Hi, this seems to be related to the issue I've been getting around the same time here: Change data feed from target tables of APPLY CHANG... - Databricks - 54436Would be great to get an explanation for the sudden change in behaviour.

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Jules
by • New Contributor
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Access from DBT job to Azure DevOps repository using Service Principal

Hi,We are using Databricks bundles to deploy our DBT project. Everything is set up to deploy and run as a Service Principal.The DBT job is connected to an Azure DevOps repository. The problem is that we cannot find a way to properly authenticate the ...

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azure devops
bundles
dbt
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