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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

ashraf1395
by Honored Contributor
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Issue while Migration from hive metastrore to ucx

tables : 4 tables in the schema :databricks_log that are not being migrated error showing they are in dbfs root location and cannot be managed while they are in dbfs mount locationExample this model_notebook _logs :   its location is dbfs:/mnt but in...

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MuthuLakshmi
Databricks Employee
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@ashraf1395 To migrate managed tables stored at DBFS root to UC, you can do it through Deep Clone or Create Table As Select (CTAS). This also means that the HMS table data needs to be moved to the cloud storage location governed by UC. Please ensure ...

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Barbarossa
by New Contributor II
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Resolved! Issue with Using Parameters for Table Version Selection in Databricks Dashboards

Hello Databricks Community,I have a quick question regarding the dashboarding functionality in Databricks:I’m utilizing table versioning, but I’m having trouble using a parameter to select a specific version as an input filter for my dashboard. Despi...

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Walter_C
Databricks Employee
  • 1 kudos

It seems that indeed there is a restriction with the usage of params and the VERSION AS OF functionality as the same behavior is showed when running it directly in the SQL editor. As per docs it states that only date or timestamp strings are accepted...

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mac08_flo
by New Contributor
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Creación de log

Buenas tardes.Estoy intentando agregar logs en la creación de mi código.El detalle es que aún no encuentro la manera de poder ingresar los logsen un archivo independiente, no que salga desde la terminal, si no,que se almacene en un archivo (example.l...

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Walter_C
Databricks Employee
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Para almacenar logs en un archivo en lugar de la terminal, puedes utilizar la configuración básica de logging en Python. A continuación, te muestro un ejemplo de cómo hacerlo: import logging # Configuración básica del logging logging.basicConfig( fi...

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costi9992
by New Contributor III
  • 942 Views
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Missing Fields in Databricks REST API Documentation & SDK Due to OpenAPI Spec Gaps

Hi Community,I've been working with the Databricks REST APIs and noticed some inconsistencies between the API documentation and the actual API responses. Specifically, there are a few fields returned in the API responses that are not documented but a...

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Walter_C
Databricks Employee
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Hello thanks for your question, in regards the last_time_activity and disk_spec this fields have been deprecated and this is the reason why it is no longer showing in the API docs, you can refer to https://kb.databricks.com/clusters/databricks-api-la...

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Leszek1
by New Contributor III
  • 926 Views
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Workflow job tasks waits

Hi,I'm having issues with Workflow Pipelines since 3-4 days. The performance is degraded and very strange behavior of the Pipeline is that Tasks waits ~2-3 minutes to start executing code in the Notebook.This is visible when you look at one of the ta...

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Walter_C
Databricks Employee
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Hello are you still behaving this issue? Are you counting the time it is taking for the cluster to start up or cluster was already running or using Serverless?

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flamezi2
by New Contributor
  • 1365 Views
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Invalid request when using the Manual generation of an account-level access token

I need to generate access token using REST API and was using the guide seen here:manually-generate-an-account-level-access-tokenWhen i try this cURL in postman, i get an error but the error description is not helpfulError: I don't know what I'm missi...

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  • 1365 Views
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Walter_C
Databricks Employee
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Are you replacing the Account_id with your actual account id associated with your subscription? Also what token are you using to authenticate or run this API call?

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GodSpeed
by New Contributor
  • 895 Views
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Postman Collection Alternatives for Data-Centric API Management?

I’ve been using Postman collections to manage APIs in my data projects, but I’m exploring alternatives. Are there tools like Apidog or Insomnia that perform better for API management, particularly when working with large data sets or data-driven work...

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Walter_C
Databricks Employee
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Insomnia: Insomnia is another strong alternative that is frequently recommended. It is known for its simplicity and effectiveness in making REST API requests. Insomnia supports the import of Postman collections and is praised for its performance and ...

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Jcowell
by New Contributor II
  • 374 Views
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Is Limit input rate Docs not correct?

In databricks docs it says "If you use maxBytesPerTrigger in conjunction with maxFilesPerTrigger, the micro-batch processes data until either the maxFilesPerTrigger or maxBytesPerTrigger limit is reached."But based on the source code this is not true...

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ozaaditya
Contributor
  • 0 kudos

In my opinion, the reason for not using both options simultaneously is that the framework would face a logical conflict:Should it stop reading after the maximum number of files is reached, even if the size limit hasn’t been exceeded?OrShould it stop ...

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183530
by New Contributor III
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How to search an array of words in a text field

Example:TABLE 1FIELD_TEXTI like salty food and Italian foodI have Italian foodbread, rice and beansmexican foodscoke, spritearray['italia', 'mex','coke']match TABLE1 X ARRAYResults:I like salty food and Italian foodI have Italian foodmexican foodsis ...

  • 1674 Views
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Meredithharper
New Contributor II
  • 2 kudos

Yes, you can do it in SQL with LIKE or IN and in PySpark using array contains, ideal for filtering Words like halal catering Barcelona, catering, and many more

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KrzysztofPrzyso
by New Contributor III
  • 2386 Views
  • 1 replies
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Best Practices for Copying Data Between Environments

Hi Everyone,I'd like to start a discussion about the best practices for copying data between environments. Here's a typical setup:Environment Setup:The same region and metastore (Unity Catalog) is used across environments.Each environment has a singl...

  • 2386 Views
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Latest Reply
Sidhant07
Databricks Employee
  • 3 kudos

Using CTAS (CREATE TABLE AS SELECT) might be a more robust solution for your use case: Independence: CTAS creates a new, independent copy of the data, avoiding dependencies on the source tableSimplified access control: Access rights can be managed so...

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arthurburkhardt
by New Contributor
  • 1343 Views
  • 2 replies
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Auto Loader changes the order of columns when infering JSON schema (sorted lexicographically)

We are using Auto Loader to read json files from S3 and ingest data into the bronze layer. But it seems auto loader struggles with schema inference and instead of preserving the order of columns from the JSON files, it sorts them lexicographically.Fo...

Data Engineering
auto.loader
json
schema
  • 1343 Views
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Sidhant07
Databricks Employee
  • 1 kudos

Auto Loader's default behavior of sorting columns lexicographically during schema inference is indeed a limitation when preserving the original order of JSON fields is important. Unfortunately, there isn't a built-in option in Auto Loader to maintain...

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simple89
by New Contributor
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Runtime increases exponentially from 11.3 to 13.3

Hello. I am using R on databricks and using the below approach. My Spark version:Single node: i3.2xlarge · On-demand · DBR: 11.3 LTS (includes Apache Spark 3.3.0, Scala 2.12) · us-east-1a, the job takes 1 hourI install all R packages (including a geo...

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Sidhant07
Databricks Employee
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Hello! It's possible that the increase in runtime when upgrading from Spark 3.3.0 (DBR 11.3) to Spark 3.4.1 (DBR 13.3) is due to changes in the underlying R runtime or package versions. When you upgrade to a new version of Spark, the R packages that ...

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rcostanza
by New Contributor III
  • 924 Views
  • 1 replies
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Changing a Delta Live Table's schema

I have a Delta Live Table whose source is a Kafka stream. One of the columns is a Decimal and I need to change its precision.What's the correct approach to changing the DLT's schema?Just changing the column's precision in the DLT definition will resu...

  • 924 Views
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Latest Reply
Sidhant07
Databricks Employee
  • 1 kudos

To change the precision of a Decimal column in a Delta Live Table (DLT) with a Kafka stream source, you can follow these steps: 1. Create a new column in the DLT with the desired precision.2. Copy the data from the old column to the new column.3. Dro...

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lprevost
by Contributor II
  • 832 Views
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sampleBy stream in DLT

I would like to create a sampleBy (stratified version of sample) copy/clone of my delta table.   Ideally, I'd like to do this using a DLT.     My source table grows incrementally each month as batch files are added and autoloader picks them up.    Id...

  • 832 Views
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Latest Reply
Sidhant07
Databricks Employee
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You can create a stratified sample of your delta table using the `sampleBy` function in Databricks. However, DLT  does not support the `sampleBy` function directly. To work around this, you can create a notebook that uses the `sampleBy` function to c...

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