- 360 Views
- 2 replies
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Resolved! Can't mergeSchema handle int and bigint?
I have a table which has a column of data type 'bigint'. While overwriting it with new data, given that I do full loads, I used 'mergeSchema' to handle schema changes. The new data's datatype was int. I thought mergeSchema can easily handle that, but...
- 360 Views
- 2 replies
- 1 kudos
- 1 kudos
Hi Dhruv,Delta won't automatically upcast unless you explicitly handle it. Cast the column Lob_Pk to LongType (which maps to BIGINT in SQL/Delta). Try below snippetfrom pyspark.sql.functions import colfrom pyspark.sql.types import LongTypecrm_retail_...
- 1 kudos
- 294 Views
- 4 replies
- 2 kudos
Resolved! [Databricks Asset Bundles] Bug: driver_node_type_id not updated
Working with databricks asset bundles (using the new python-based definition), if you have a job_cluster defined using driver_node_type_id, and then update it to no longer have it defined, but only node_type_id, the driver node_type never gets update...
- 294 Views
- 4 replies
- 2 kudos
- 2 kudos
There is no built-in way in Databricks Asset bundles or terraform to automatically inherit the value of driver_node_type_id for node_type_id."You must set both explicitly in your configuration"You can always see your updated detail resource from the ...
- 2 kudos
- 1891 Views
- 2 replies
- 0 kudos
Resolved! Understanding least common type in databricks
I was reading the data type rules and found about least common type.I have a doubt. What is the least common type of STRING and INT? The referred link gives the following example saying the least common type is BIGINT.-- The least common type between...
- 1891 Views
- 2 replies
- 0 kudos
- 340 Views
- 4 replies
- 4 kudos
Resolved! Least Common Type is different in Serverless and All Purpose Cluster.
The following statement gives different outputs in different computes.In Databricks, 15.4 LTS%sqlSELECT typeof(coalesce(5, '6'));-- OutputstringIn Serverless, environment version 4%sqlSELECT typeof(coalesce(5, '6'));-- OutputbigintThere are other cas...
- 340 Views
- 4 replies
- 4 kudos
- 4 kudos
@Dhruv-22 Regarding your 1st question, I'm not sureYou can refer to https://docs.databricks.com/aws/en/sql/language-manual/parameters/ansi_mode#system-default to understand what happens when ansi mode is disabled
- 4 kudos
- 256 Views
- 2 replies
- 3 kudos
Resolved! Regarding : How to use Row_number() in dlt pipelines
We have two streaming tables : customer_info and customer_info_history and we joined them using full join to create temp table in pyspark and now we want to eliminate the de-duped records from this temp table. Tried using row_number() but facing bel...
- 256 Views
- 2 replies
- 3 kudos
- 3 kudos
Hello @anusha98 , You’re hitting a real limitation of Structured Streaming: non-time window functions (like row_number() over (...)) aren’t allowed on streaming DFs. You need to use agg().max() to get the “latest value per key” @dlt.table(name="temp_...
- 3 kudos
- 151 Views
- 1 replies
- 1 kudos
Lakeflow Pipelines Trying to Read accented file with spark.readStream but failure
Trying to read a accented file(French characters) but the spark.readStream function is not working and special characters turn into something strange(ex. �) spark.readStream .format("cloudfiles") .option("cloudFiles....
- 151 Views
- 1 replies
- 1 kudos
- 1 kudos
Hello @AmarKap , When Spark decodes CP1252 bytes as UTF-8/ISO-8859-1, you’ll see the replacement char like � Can you read the file as : df = (spark.readStream.format("cloudFiles").option("cloudFiles.format", "text").option("encoding", "windows-1252")...
- 1 kudos
- 2251 Views
- 1 replies
- 1 kudos
Replay stream to migrate to liquid cluster
The documentation is sparse about how to migrate a partition table to a liquid cluster as the Alter table suggested in the documentation doesnt work when its a partitioned table.The comments on this forum suggest replaying the stream. And this is wha...
- 2251 Views
- 1 replies
- 1 kudos
- 1 kudos
Greetings @EndreM , I did some digging internally and I have come up with some helpful tips/tricks to help guide you through this issue: Based on your situation, you're encountering several common challenges when migrating a partitioned table to liqu...
- 1 kudos
- 2369 Views
- 1 replies
- 1 kudos
Unable to create databricks group and add permission via terraform
I have the following terraform code to create a databricks group and add permission to a workflow: resource "databricks_group" "dbx_group" { display_name = "ENV_MONITORING_TEAM" } resource "databricks_permissions" "workflow_permission" { job_id ...
- 2369 Views
- 1 replies
- 1 kudos
- 1 kudos
Greetings @soumiknow , I did some digging internally and found something that may help: Based on the information gathered, I can now draft a comprehensive response to this Databricks Community question about the Terraform authentication issue. ## Dra...
- 1 kudos
- 320 Views
- 2 replies
- 2 kudos
Resolved! How to make FOR cycle and dynamic SQL and variables work together
I am working on a testing notebook where the table that is tested can be given as a widget. I wanted to write it in SQL. The notebook does the following steps in a cycle that should run 10 times:1. Store the starting version of a delta table in a var...
- 320 Views
- 2 replies
- 2 kudos
- 2 kudos
Thank you! I realised that the example I gave was bad. However, what I was missing is that I did not know how to set a variable in SQL scripting. Including the SET command within the sql string does not work, you have to use the EXECUTE IMMEDIATE ......
- 2 kudos
- 403 Views
- 4 replies
- 1 kudos
Resolved! Problem in VS Code Extention
Until a few days ago, I was working with Databricks Connect using the VS Code extension, and everything worked perfectly.In my .databrickscfg file, I had authentication configured like this: [name]host:token: When I ran my code, everything worked fi...
- 403 Views
- 4 replies
- 1 kudos
- 1 kudos
Hi @DatabricksEngi1 - Please ensure you have a Python Venv set up for each Python version that you use with Databricks Connect. Also, I have given step-by-step ways to debug the issue, clear the cache, etc [Read the files and instructions carefully b...
- 1 kudos
- 19468 Views
- 12 replies
- 2 kudos
Fuzzy text matching in Spark
I have a list of client provided data, a list of company names. I have to match those names with an internal database of company names. The client list can fit in memory (its about 10k elements) but the internal dataset is on hdfs and we use Spark ...
- 19468 Views
- 12 replies
- 2 kudos
- 2 kudos
+1 for rapidfuzz, I have used it in production pipelines. Better than just levenshtein function, as rapidfuzz provides a couple of other algorithms as well. I will warn you to not do what 2024 me attempted, which is use LLM to solve for this. It soun...
- 2 kudos
- 362 Views
- 1 replies
- 1 kudos
Resolved! TransformWithState is not emitting for live streams
Hi Team, For one of my custom logics i went with transformwithState processor. However it is not working for live stream inputs., I have a start date filter on my df_base and when I give start date that is not current, the processor computes df_loss ...
- 362 Views
- 1 replies
- 1 kudos
- 1 kudos
I managed to solve this. The issue was with how I handled the value state in the def init method. It was handled as a dataframe which caused the state to never materialize nor update therefore emitting nulls.I changed them to a tuple of values and th...
- 1 kudos
- 2566 Views
- 1 replies
- 0 kudos
Delta sharing view and cached data in DSFF
I've created a view with row level access based on CURRENT_RECIPIENT() function in the where clause. And I have 100s of clients as recipients that query this view.The problem is, when I modify this view CREATE OR REPLACE with a new sql code, and reci...
- 2566 Views
- 1 replies
- 0 kudos
- 0 kudos
Have you tried something like this already? Force Cache Invalidation (Recommended) -- After CREATE OR REPLACE VIEW, execute: ALTER SHARE <share_name> REMOVE TABLE <schema>.<view_name>; ALTER SHARE <share_name> ADD TABLE <schema>.<view_name>; Thi...
- 0 kudos
- 2107 Views
- 1 replies
- 1 kudos
Resolved! Lakebridge code conversion | Permission issue
Hi,I’ve successfully installed the transpile module from Lakebridge and tried the tool to convert Informatica mappings into PySpark code. However, I’m encountering a PermissionError during execution. I’ve provided the relevant environment details and...
- 2107 Views
- 1 replies
- 1 kudos
- 1 kudos
Hi @abhijit007 - I see that this has been resolved in the 0.10.5 release. Can you please retest and confirm?
- 1 kudos
- 297 Views
- 2 replies
- 3 kudos
Resolved! Results from the spark application to driver
I tried to read many articles but still not clear on this:The executors complete the execution of tasks and have the results with them.1. The results(output data) from all executors is transported to driver in all cases or executors persist it if tha...
- 297 Views
- 2 replies
- 3 kudos
- 3 kudos
Hello @raghvendrarm1 , Below are the answers to your questions: Do executors always send “results” to the driver? No. Only actions that return values (e.g., collect, take, first, count) bring data back to the driver. collect explicitly “returns al...
- 3 kudos
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