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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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Joao_DE
by • New Contributor III
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JDBC connection

Hi everyone! I have a question. For a project I need to establish a jdbc connection using spark.read. My question is when does the connection is deleted. That is because I will read multiple tables from that database, so if I could just create a conn...

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Joao_DE
New Contributor III
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Hi Vidula!I haven´t figure out a solution yet, so any help would be appreciatedThank you!

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Ayur
by • New Contributor II
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Resolved! Unsupported_operation : Magic commands (e.g. %py, %sql and %run) are not supported with the exception of %pip within a Python notebook. Cells containing magic commands are ignored - DLT pipeline

Hi,I'm trying to use magic command(to change to python in a notebook with sql as a default language) in a dlt pipeline,.When starting the pipeline cells containing magic command are ignored., with the warning message below:"Magic commands (e.g. %py, ...

Data Engineering
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Anonymous
Not applicable
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Hi @Yassine Dehbi​ Hope all is well! Just wanted to check in if you were able to resolve your issue and would you be happy to share the solution or mark an answer as best? Else please let us know if you need more help. We'd love to hear from you.Than...

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chanda02
by • New Contributor II
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GRANT permission does not work on column level access control for table in unity catalog

I am trying to run below SQL command for granting column specific control to user but it throws error.I have given USE_CATALOG for catalog and USE_SCHEMA permission for schema for the user and have set current catalog and schema.I am using Databricks...

image
Data Engineering
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Debayan
Databricks Employee
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Hi, you can find the best practises here: https://docs.databricks.com/data-governance/unity-catalog/best-practices.htmlAlso, for cluster access modes for unity catalog : https://docs.databricks.com/data-governance/unity-catalog/index.html#cluster-sec...

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Leszek
by • Contributor
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How to handle schema changes in streaming Delta Tables?

I'm using Structure Streaming when moving data from one Delta Table to another.How to handle schema changes in those tables (e.g. adding new column)?

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Murthy1
Contributor II
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Hello,I think the only way of handling is to mention the schema within the job through a schema file. The other way is to restart the job to infer the new schema automatically.

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KevSpally
by • New Contributor
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When accessing a view in Unity Catalog; access to underlying tables of the view is also needed.

My goal is that i want to provide users access to a view but not the underlying tables. I only want them to see specific columns and rows of the table. When i just give the select permissions on the view the user gets an error that they also need acc...

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jonathan_ruiz
New Contributor II
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I have exactly the same question, did anyone get the right answer?

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chanansh
by • Contributor
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Resolved! autoloader documentation does not work

I am trying to following the documentation here:https://learn.microsoft.com/en-us/azure/databricks/getting-started/etl-quick-startMy code looks like:(spark.readStream .format("cloudFiles") .option("header", "true") #.option("cloudFiles.partitio...

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Murthy1
Contributor II
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Hi,It seems like you are writing to a path which is not empty and has some non - delta format files. Also, can you confirm if the path mentioned in the error message "`s3://nbu-ml/projects/rca/msft/dsm09collectx/delta` " is the path you are writing t...

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MichaelN1
by • New Contributor II
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How to change the width of the lines for Python Format in a notebook?

Hidoes anyone know how to change the default 80 symbols for the line length when executing "Format Python Code" in Databricks notebook?These days ultra wide monitors are new standards and having 80 line width with breaks to a new line is not usable

Data Engineering
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Rajeev_Basu
Contributor III
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It may not be possible presently. but would be good to be recommended to Databricks as a feedback.

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Rishabh-Pandey
by • Esteemed Contributor
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Resolved! connect databricks to teradata

hey i want to know can we connect databricks to the teradata database and if yes what will be the procedure ??? help would be appreciated

Data Engineering
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jose_gonzalez
Databricks Employee
  • 8 kudos

use the JDBC driver from here https://docs.databricks.com/integrations/jdbc-odbc-bi.html

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venkat-bodempud
by • New Contributor III
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Power BI - Databricks Integration using Service Principal

Hello Community,We are able to connect to databricks(using Personal access token) from Power BI Desktop and we able to set up scheduling databricks notebook using DataFactory for every 10 minutes(as per our requirement). We want to avoid using the pe...

Data Engineering
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Prabakar
Databricks Employee
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You can use the token generated for the service principal and use it. As a security best practice, when authenticating with automated tools, systems, scripts, and apps, Databricks recommends you use access tokens belonging to service principals inste...

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chanansh
by • Contributor
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how to compute difference over time of a spark structure streaming?

I have a table with a timestamp column (t) and a list of columns for which I would like to compute the difference over time (v), by some key(k): v_diff(t) = v(t)-v(t-1) for each k independently.Normally I would write:lag_window = Window.partitionBy(C...

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chanansh
Contributor
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I found this but could not make it work https://www.databricks.com/blog/2022/10/18/python-arbitrary-stateful-processing-structured-streaming.html

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Skesaram
by • New Contributor II
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Need help to connect to local DB from Data bricks

jdbcHostname="478"jdbcPort=1433jdbcDatabase="Onprem_AzureDB"jdbcUsername="upendra"jdbcPassword="upendrakumar"jdbcDriver="com.microsoft.sqlserver.jdbc.SQLServerDriver"jdbcUrl=f"jdbc:sqlserver://{jdbcHostname}:{jdbcPort};databaseName={jdbcDatabase};use...

Data Engineering
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Debayan
Databricks Employee
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Hi, Could you please verify the network connectivity from Databricks to the SQL server? Please make sure SQL:port is allowed in your firewall rules or security groups.

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lasmali
by • New Contributor II
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Instance Profile creation via the Databricks REST API returns "INVALID_PARAMETER_VALUE"

# Problem StatementWe have a need to create Instance Profiles via the Databricks REST API, but the endpoint returns an "INVALID_PARAMETER_VALUE" error with "Syntactically invalid AWS instance profile ARN" message even when provided an appropriate ARN...

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Anonymous
Not applicable
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Hi @lasse Lidegaard​ Hope all is well! Just wanted to check in if you were able to resolve your issue and would you be happy to share the solution or mark an answer as best? Else please let us know if you need more help. We'd love to hear from you.Th...

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mebinjoy
by • New Contributor II
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Resolved! Certificate not received.

I had completed the Data Engineering Associate V3 certification today morning and I'm yet to receive my certification. I had received a mail stating that I had passed and the certification would be mailed.

Data Engineering
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Anonymous
Not applicable
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Hi @Mebin Joy​ Thank you for reaching out! Please submit a ticket to our Training Team here: https://help.databricks.com/s/contact-us?ReqType=training  and our team will get back to you shortly. Regards

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cmilligan
by • Contributor II
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Resolved! Reference a single item tuple using .format() in spark.sql()

I'm trying to pass the elements of a tuple into a sql query using .format(). This works fine when I have multiple items in my tuple, but when using a single item in a tuple I get an error.tuple1 = (1,2,3) tuple2 = (5,)   combo = tuple1 + tuple2   pri...

Result
Data Engineering
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Lakshay
Databricks Employee
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Could you please post the code and the error that you are getting?

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jerry747847
by • New Contributor III
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Resolved! When to increase maximum bound vs when to increase cluster size?

Hello experts,For the below question, I am trying to understand why option C was selected instead of B? As B would also have resolved the issueQuestion 40A data analyst has noticed that their Databricks SQL queries are running too slowly. They claim ...

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JRL
New Contributor II
  • 11 kudos

On a sql server, there are wait states. Wait states occur when several processors (vCPUs) are processing and several threads are working through the processors. A longer running thread that has dependencies, can cause the thread that may have begun o...

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