- 22337 Views
- 1 replies
- 1 kudos
Unable to infer schema for Parquet at
I have this code in a notebook:val streamingDataFrame = incomingStream.selectExpr("cast (body as string) AS Content") .withColumn("Sentiment", toSentiment($"Content")) import org.apache.spark.sql.streaming.Trigger.ProcessingTime val result = stre...
- 22337 Views
- 1 replies
- 1 kudos
- 1 kudos
seems like an invalid parquet file. my guess is the incoming data has mixed types (for the same column) or a different/invalid structure.
- 1 kudos
- 1050 Views
- 0 replies
- 1 kudos
medium.com
I wrote a review of Koalas by porting an existing pandas program. Comments welcome.https://medium.com/@chuck.connell.3/pandas-on-databricks-via-koalas-a-review-9876b0a92541
- 1050 Views
- 0 replies
- 1 kudos
- 683 Views
- 0 replies
- 0 kudos
mokshaessentials.com
Mokshaessentials is one of the best essential oils providers that provides 100 % pure & natural essential oils.Also, buy essential oils only @Mokshaessentials.Web:- https://mokshaessentials.com/#naturalessentialoils,#buyessentialoils, #bestessentialo...
- 683 Views
- 0 replies
- 0 kudos
- 2068 Views
- 0 replies
- 2 kudos
Azure Databricks cluster metrics storage and cleanup (Ganglia, Event logs, cluster logs etc)
Hi Team, by default where does Azure databricks store ganglia metrics snapshots and other logs of the cluster? and if we want to manually do a cleanup what are the steps to do the same?
- 2068 Views
- 0 replies
- 2 kudos
- 3566 Views
- 1 replies
- 3 kudos
How can I create a column on the fly which would have same value for all rows in spark sql query
I have a SQL query which I am converting into spark sql in azure databricks running in my jupyter notebook. In my SQL query, a column named Type is created on the fly which has value 'Goal' for every row:SELECT Type='Goal', Value FROM tableNow, when...
- 3566 Views
- 1 replies
- 3 kudos
- 3 kudos
The correct syntax would be: SELECT 'Goal' AS Type, Value FROM table
- 3 kudos
- 1764 Views
- 1 replies
- 1 kudos
Renaming delta table gives "Not a delta table" error
I am trying to rename a delta table. But I get the error saying "is not a delta table"
- 1764 Views
- 1 replies
- 1 kudos
- 1 kudos
Can you provide a screenshot of the error message and the code snippet?
- 1 kudos
- 5268 Views
- 1 replies
- 1 kudos
Cant select a delta table with "is not a Delta table" error.
I have a delta table which I cant select now. The error is "is not a Delta table" error.
- 5268 Views
- 1 replies
- 1 kudos
- 1 kudos
Can you provide the full error message?
- 1 kudos
- 2335 Views
- 1 replies
- 2 kudos
Resolved! Databricks Views
How do we find the definition of View in databricks?
- 2335 Views
- 1 replies
- 2 kudos
- 2 kudos
You can use the extended table description. For example, the following python code will print the current definition of the view: table_name = "" df = spark.sql("describe table extended {}".format(table_name)) df.createOrReplaceTempView("view_desript...
- 2 kudos
- 7029 Views
- 1 replies
- 0 kudos
SQL Alter table command not working for me
I am a novice with databricks. I am performing some independent learning. I am trying to add a column to an existing table. Here is my syntax: %sql ALTER TABLE car_parts ADD COLUMNS (engine_present boolean) which returns the error:SyntaxError: inva...
- 7029 Views
- 1 replies
- 0 kudos
- 0 kudos
Is the table you are working with in the Delta format? The table commands (i.e. Alter) do not work for all storage formats. For example if I run the following commands then I can alter a table. Note - there is no data in the table but the table exist...
- 0 kudos
- 2488 Views
- 1 replies
- 0 kudos
Missing Databricks Datasets
Hi, I am looking at my Databricks workspace and it looks like I am missing DBFS Databricks-dataset root folder. The dbfs root folders I can view are FileStore, local_disk(),mnt, pipelines and user. Can I mount Databricks-dataset or am I missing some...
- 2488 Views
- 1 replies
- 0 kudos
- 0 kudos
If you run the following command do you receive an error? Or do you just get an empty list?dbutils.fs.ls("/databricks-datasets")
- 0 kudos
- 2576 Views
- 1 replies
- 1 kudos
DNS_Analytics Notebook Problems
Hello everyone! First post on the forums, been stuck at this for awhile now and cannot seem to understand why this is happening. Basically, I have been using a seems to be premade Databricks notebook from Databricks themselves for a DNS Analytics exa...
- 2576 Views
- 1 replies
- 1 kudos
- 1 kudos
@NickGoodfella​ , What's the notebook you're looking at, this one? https://databricks.com/notebooks/dns-analytics.html Are you sure all the previous cells executed? this is suggesting there isn't a model at the path that's expected. You can take a lo...
- 1 kudos
- 1853 Views
- 1 replies
- 0 kudos
The State in-stream is growing too large in stream
I have a customer with a streaming pipeline from Kafka to Delta. They are leveraging RocksDB, watermarking for 30min and attempting to dropDuplicates. They are seeing their state grow to 6.2 billion rows--- on a stream that hits at maximum 7000 rows ...
- 1853 Views
- 1 replies
- 0 kudos
- 0 kudos
I've seen a similar issue with large state using flatMapGroupsWithState. It is possible that A.) they are not using the state.setTimeout correctly or B.) they are not calling state.remove() when the stored state has timed out, leaving the state to gr...
- 0 kudos
- 7765 Views
- 2 replies
- 1 kudos
how to calculate median on azure databricks delta table using sql
how to calculate median on delta tables in azure databricks using sql ? select col1, col2, col3, median(col5) from delta table group by col1, col2, col3
- 7765 Views
- 2 replies
- 1 kudos
- 1 kudos
try with the percentile function, as median = percentile 50: https://spark.apache.org/docs/latest/api/sql/#percentile
- 1 kudos
- 3053 Views
- 1 replies
- 0 kudos
Genrated partition column not being used by optimizer
We have created a table using the new generated column feature (https://docs.microsoft.com/en-us/azure/databricks/delta/delta-batch#deltausegeneratedcolumns) CREATE TABLE ingest.MyEvent( data binary, topic string, timestamp timestamp, date dat...
- 3053 Views
- 1 replies
- 0 kudos
- 0 kudos
I think you have to pass a date in your select query instead of a timestamp.The generated column will indeed derive a data from the timestamp and partition by it. But the docs state: When you write to a table with generated columns and you do not ex...
- 0 kudos
- 2319 Views
- 1 replies
- 1 kudos
What could be the issue with parquet file?
when trying to update or display the dataframe, one of the parquet files is having some issue, "Parquet column cannot be converted. Expected: DecimalType(38,18), Found: DOUBLE" What could be the issue?
- 2319 Views
- 1 replies
- 1 kudos
- 1 kudos
try to explicitly cast the double column to dec(38,18) and then do the display.
- 1 kudos
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