lmmr
March 6, 2025, 7:37pm
1
Hi everyone,
I’m currently facing an issue while trying to use a DB Loader to load data into BigQuery. The process fails and I receive the following error:
Has anyone been through the same thing?
The parameters for “schema” and “table” are controlled by variables.
ipazin
March 7, 2025, 7:24am
2
Hello @lmmr ,
and welcome to KNIME Community!
Does it work without using flow variables? If it does then you should check if you configured DB Loader properly with correct flow variables and inspect the values of these flow variables you are passing to the node.
Br,
Ivan
1 Like
lmmr
March 7, 2025, 6:09pm
3
It doesn’t work that way either
I did a reading test with a db query reader and works fine but the loader node does not work, I don’t know if the problem is when writing the data
@lmmr does the loader need an hdfs (Google bucket) connection to store an intermediate parquet file? I am not sure. Would have to try.
Also: is the table already there or would you need to create one.
Hi @lmmr
According to the error, what you need is the File System Port in the DB Loader, which is an additional port to the DB Loader.
Try clicking on the + sign right bellow the DB Connector, and a blue port will appear.
You should have some sort of connector to your BigQuery instance. Here I’m showing you an example using AWS S3 and Redshift connectors (I don’t have the Google connectors at the moment).
If you manage to do this, it should work.
4 Likes
system
Closed
June 6, 2025, 10:25pm
6
This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.
forum
July 21, 2025, 11:08am
7
Internal ticket ID: AP-24482
Summary: DB Loader fails when connected to Google BigQuey with No FileSystem for scheme “file”
Fix version(s): 5.4.5, 5.5.1
Other related topic(s):
Hi KNIME Team,
I’m encountering an issue with the DB Loader node when uploading data to a Google BigQuery table using Parquet format. This problem started occurring only after upgrading to version 5.4.4. In earlier versions (e.g., 5.4.3 and prior), the exact same workflow and configuration worked perfectly.
The error message I’m receiving is:
Execute failed: No FileSystem for scheme “file”
This seems to indicate a problem related to how file systems are handled internally in this version whe…
When attempting to create a table and load data into BigQuery using the DB Loader node, the Loader node executes to 10% after which I get an error: “Execute Failed: No Filesystem for scheme “file””. On the other hand, when using the DB Writer node, my table gets created and data writes to the table, albeit extremely slowly. Any insite into what is causing this error in this node?