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Warehousing & Analytics
Engage in discussions on data warehousing, analytics, and BI solutions within the Databricks Community. Share insights, tips, and best practices for leveraging data for informed decision-making.
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Data + AI Summit 2024 - Data Warehousing, Analytics, and BI

Forum Posts

MadelynM
by Databricks Employee
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[Recap] Data + AI Summit 2024 - Warehousing & Analytics | Improve performance and increase insights

Here's your Data + AI Summit 2024 - Warehousing & Analytics recap as you use intelligent data warehousing to improve performance and increase your organization’s productivity with analytics, dashboards and insights.  Keynote: Data Warehouse presente...

Screenshot 2024-07-03 at 10.15.26 AM.png
Warehousing & Analytics
AI BI Dashboards
AI BI Genie
Databricks SQL
  • 895 Views
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acurus
by New Contributor II
  • 2613 Views
  • 2 replies
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Not able to escape `-` in external connected tablename

We are having some issues with getting data from some tables with the character `-` in their tablename.We are connected to the database with an SQL server connection, and the database is (as far as we know)  a Microsoft Azure SQL Database. We do not ...

  • 2613 Views
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martinschou
New Contributor II
  • 2 kudos

Had the same issue when querying a table with the - character in the table name. Got the error: Incorrect syntax near '-'.Got the error on Databricks runtime version: 13.2 (includes Apache Spark 3.4.0, Scala 2.12)No error when using Databricks runtim...

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ssequ
by New Contributor II
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Resolved! Backspaces in Foreign Catalog Table Names

Hi,is there a way to import tables with UC disallowed characters when creating a foreign catalog? The database we are dealing with contains table names with backspaces and UC seems to completely ignore them when creating the catalog.Thanks for any he...

  • 2120 Views
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daniel_sahal
Esteemed Contributor
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@ssequ I assume that you're refering to lakehouse federation? Unfortunately that's a limitation, tables with disallowed characters will be ignored.

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vishva-fivetran
by New Contributor II
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Databricks query on a warehouse failing with ` spark.driver.maxResultSize` error

we are trying to run a select * from one of our catalog tables. we are seeing the error : org.apache.hive.service.cli.HiveSQLException: Error running query: org.apache.spark.SparkException: Job aborted due to stage failure: Total size of serialized r...

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anardinelli
Databricks Employee
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Hello @vishva-fivetran how are you? To set the spark.driver.maxResultSize property, you can do so in the cluster Spark config. The property spark.driver.maxResultSize can be set to a value higher than the value reported in the exception message. For ...

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Akshay_Petkar
by Contributor
  • 1337 Views
  • 1 replies
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Resolved! Is Photon Enabled by Default for Warehouses in Databricks?

When creating a cluster in Databricks, I notice an option for enabling Photon. However, this option does not appear when configuring a warehouse. Is Photon enabled by default for warehouses in Databricks, or is there a different procedure to enable i...

  • 1337 Views
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Yeshwanth
Databricks Employee
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@Akshay_Petkar good day! Photon is enabled by default for Databricks SQL warehouses. There is no need for a separate procedure to enable it for warehouses. For clusters, you have the option to manually enable or disable Photon by selecting the "Use P...

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DominikBraun
by New Contributor II
  • 1355 Views
  • 2 replies
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Resolved! SQL Warehouse: INVALID_PARAMETER_VALUE when starting

Hey everybody.When creating a SQL Warehouse and trying to start it, I get the following error message:Clusters are failing to launch. Cluster launch will be retried.Request to create a cluster failed with an exception: INVALID_PARAMETER_VALUE: Cannot...

  • 1355 Views
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Ismael-K
Databricks Employee
  • 1 kudos

One suggestion would be if you could please have the workspace admin check the Data Access Configuration properties in the Workspace Settings for any secrets that may be held which the warehouse is trying to access on start up? These data access prop...

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Akshay_Petkar
by Contributor
  • 1265 Views
  • 1 replies
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Resolved! Databricks warehouse cost calculation

I would like to know how the cost for a warehouse in Databricks is calculated. Specifically, if the cost for a 2x small warehouse is 4 DBUs per hour, how is the cost determined if I use the warehouse for only 30 minutes and then terminate it? Will it...

  • 1265 Views
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daniel_sahal
Esteemed Contributor
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@Akshay_Petkar As it states in Databricks documentation:Databricks offers you a pay-as-you-go approach with no up-front costs. Only pay for the products you use at per second granularity.It will charge 2 DBUs.

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Akshay_Petkar
by Contributor
  • 843 Views
  • 1 replies
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Facing Data Truncation Issues in Databricks Dashboards

I'm encountering data truncation in my Databricks dashboards. I'm working with a large dataset, and the dashboard only displays a limited number of (truncated) rows.let's take a dataset containing 1 million sales records. The dashboard currently only...

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NandiniN
Databricks Employee
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Hi @Akshay_Petkar , This is simple in Databricks SQL, just uncheck LIMIT 1000 in the drop down. https://docs.databricks.com/en/sql/get-started/visualize-data-tutorial.html Limit 1000 is selected by default for all queries to ensure that the query ret...

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mbhakta
by New Contributor II
  • 4368 Views
  • 2 replies
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Change Databricks Connection on Power BI (service)

We're creating a report with Power BI using data from our AWS Databricks workspace. Currently, I can view the report on Power BI (service) after publishing. Is there a way to change the data source connection, e.g. if I want to change the data source...

  • 4368 Views
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Srushti
New Contributor II
  • 2 kudos

Have you got any solution for this?

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diego_poggioli
by Contributor
  • 4829 Views
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Resolved! Nested subquery is not supported in the DELETE condition

According to the documentation the WHERE predicate in a DELETE statement should supports subqueries, including IN, NOT IN, EXISTS, NOT EXISTS, and scalar subqueries.if I try to run a query like:   DELETE FROM dev.gold.table AS trg WHERE EXISTS ( ...

  • 4829 Views
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Tejas2022
New Contributor II
  • 2 kudos

@diego_poggioli Can you try selecting a 'year_month_version' column from the view instead of select * DELETE FROM dev.gold.table AS trg WHERE year_month_version IN (select year_month_version FROM v_distinct_year_month_version)  

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Akshay_Petkar
by Contributor
  • 2203 Views
  • 2 replies
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Resolved! Truncated Data on Lakeview Dashboard

When we create a Lakeview dashboard, the visuals show truncated data. I want to create a dashboard using the entire dataset because the charts do not display the exact values needed for accurate analysis.

  • 2203 Views
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raphaelblg
Databricks Employee
  • 2 kudos

Hello @Akshay_Petkar , The FrontEnd (FE) rendering is a limit that determines what data we render on the FE that has been returned by the BackEnd (BE). Render all button allows you to render all the data on the FE that has been returned by the BE. Re...

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data_guy
by New Contributor
  • 1529 Views
  • 1 replies
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Resolved! Issue while extracting value From Decimal Key is Json

Hi Guys,I have a JSON as the below structure where the key is as decimal.{ "5.0": { "a": "15.92", "b": 0.0, "c": "15.92", "d": "637.14" }, "0.0": { "a": "15.92", "b": 0.0, "c": "15.92", "d": "637.14" } }schema_of_json returns the following:STRUCT<`0....

  • 1529 Views
  • 1 replies
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raphaelblg
Databricks Employee
  • 1 kudos

Hello @data_guy , I've performed a reproduction of your scenario and could successfully select all data. Please check screenshot below:      This is the source code: import json data_values = { "5.0": { "a": "15.92", "b": 0.0, "c":...

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dalion
by New Contributor III
  • 5071 Views
  • 5 replies
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Azure VNet Injection and Power BI

Need help in Azure Databricks VNet architecture with Power BI. Our Databricks setup is based on No Public IP. Does anyone has a architecture that can support the Databricks setup in VNet Injection and Power BI tool accessing the Databricks.

  • 5071 Views
  • 5 replies
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databricks_noob
New Contributor II
  • 2 kudos

happy to help further. email me or call me - takutz.hoshyam@gmail.com, +15123726322.

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