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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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Immassive
by • New Contributor II
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Reading information_schema tables through JDBC connection

Hi, I am using Unity Catalog as storage for data. I have an external system that establishes connection to Unity Catalog via a JDBC connection using the Databricks driver:Configure the Databricks ODBC and JDBC drivers - Azure Databricks | Microsoft L...

Data Engineering
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Immassive
New Contributor II
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Note: I can see the tables of the system.information schema in the UI of Databricks and read them there.

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JonLaRose
by • New Contributor III
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Resolved! Max amount of tables

Hi!What is the maximum amount of tables that is possible to create in a Unity catalog?Is there any difference between managed and external tables? If so, what is the limit for external tables? Thanks,Jonathan.

Data Engineering
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JonLaRose
New Contributor III
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answer is here:https://docs.databricks.com/en/data-governance/unity-catalog/index.html#resource-quotas

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coltonflowers
by • New Contributor III
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MLFlow Spark UDF Error

After trying to run spark_udf = mlflow.pyfunc.spark_udf(spark, model_uri=logged_model,env_manager="virtualenv")We get the following error:org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in stage 145.0 failed 4 times, most re...

Data Engineering
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alj_a
by • New Contributor III
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source db and target db in DLT

Hi,Thanks in advance.I am new in DLT, the scenario is i need to read the data from cloud storage(ADLS) and load it into my bronze table. and read it from bronz table -> do some DQ checks and load the cleaned data into my silver table. finally populat...

Data Engineering
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marianopenn
by • New Contributor III
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Databricks VSCode Extension Sync Timeout

I am using the databricks VSCode extension to sync my local repository to Databricks Workspaces. I have everything configured such that smaller syncs work fine, but a full sync of my repository leads to the following error:Sync Error: Post "https://<...

Data Engineering
dbx sync
Repos
VSCode
Workspaces
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kimongrigorakis
New Contributor II
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Same issue here..... Can someone please help??

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Phani1
by • Valued Contributor II
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Unity catalog accounts

Hi Team,We have the requirement to have metadata(Unity catalog) in one AWS account and data storage(Delta tables under data) in another account, is it possible to do that , Do we face any technical/Security issue??

Data Engineering
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278875
by • New Contributor
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How do I figure out the cost breakdown for Databricks

I'm trying to figure out the cost breakdown for the Databricks usage for my team.When I go into the Databricks administration console and click Usage when I select to show the usage By SKU it just displays the type of cluster but not the name of it. ...

Data Engineering
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MuthuLakshmi
Databricks Employee
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Please check the below docs for usage related informations. The Billable Usage Logs: https://docs.databricks.com/en/administration-guide/account-settings/usage.html You can filter them using tags for more precise information which you are looking for...

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dave_d
by • New Contributor II
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What is the "Columnar To Row" node in this simple Databricks SQL query profile?

I am running a relatively simple SQL query that writes back to a table on a Databricks serverless SQL warehouse, and I'm trying to understand why there is a "Columnar To Row" node in the query profile that is consuming the vast majority of the time s...

dave_d_0-1696974904324.png
Data Engineering
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Annapurna_Hiriy
Databricks Employee
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 @dave_d We do not have a document with list of operations that would bring up ColumnarToRow node. This node provides a common executor to translate an RDD of ColumnarBatch into an RDD of InternalRow. This is inserted whenever such a transition is de...

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Rafal9
by • New Contributor II
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Issue during testing SparkSession.sql() with pytest.

Dear Community,I am testing pyspark code via pytest using VS code and Databricks Connect.SparkSession is initiated from Databricks Connect: from databricks.connect import DatabricksSessionspark = DatabricksSession.builder.getOrCreate()I am  receiving...

Data Engineering
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svrdragon
by • New Contributor
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optimizeWrite takes too long

Hi , We have a spark job write data in delta table for last 90 date partition. We have enabled spark.databricks.delta.autoCompact.enabled and delta.autoOptimize.optimizeWrite. Job takes 50 mins to complete. In that logic takes 12 mins and optimizewri...

Data Engineering
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erigaud
by • Honored Contributor
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Merge DLT with Delta Table

Is there anyway to accomplish this ? I have an existing Delta Table and a separate Delta Live Table pipelines and I would like to merge data from a DLT to my existing Delta Table. Is this doable or completely impossible ?

Data Engineering
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LeifBruen
New Contributor II
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Merging data from a Delta Live Table (DLT) into an existing Delta Table is possible with careful planning. Transition data from DLT to Delta Table through batch processing, data transformation, and ETL processes, ensuring schema compatibility. 

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NotARobot
by • New Contributor III
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Force DBR/Spark Version in Delta Live Tables Cluster Policy

Is there a way to use Compute Policies to force Delta Live Tables to use specific Databricks Runtime and PySpark versions? While trying to leverage some of the functions in PySpark 3.5.0, I don't seem to be able to get Delta Live Tables to use Databr...

test_cluster_policy.png dlt_version.png
Data Engineering
Compute Policies
Delta Live Tables
Graphframes
pyspark
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JohnJustus
by • New Contributor III
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Accessing Excel file from Databricks

Hi,I am trying to access excel file that is stored in Azure Blob storage via Databricks.In my understanding, it is not possible to access using Pyspark. So accessing through Pandas is the option,Here is my code.%pip install openpyxlimport pandas as p...

Data Engineering
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