Databricks(AWS) to snowflake connection
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04-30-2025 03:04 AM
Hi everyone,
I have implemented Auto loader working as expected. i need to track the files which are loaded into stage table.
Here is the issue, the file tracking table need to create in snowflake from here i need to track the files.
How to connect databricks and snowflake , pls suggest.
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04-30-2025 06:53 AM
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Configure Databricks Snowflake Connector:
Databricks provides a built-in Snowflake connector that integrates with Snowflake. Steps to set it up include:- Add the Snowflake JDBC driver and Snowflake Spark connector library to your Databricks environment.
- Set the connection options such as
sfURL(Snowflake account URL),sfWarehouse(Snowflake warehouse),sfDatabase(database name),sfSchema(schema name),sfRole(optional, Snowflake role), and the authentication credentials (sfUserandsfPassword).
Example connection code in Python: ```python options = { "sfURL": "<Your Snowflake URL>", "sfWarehouse": "<Your Snowflake Warehouse>", "sfDatabase": "<Your Snowflake Database>", "sfSchema": "<Your Snowflake Schema>", "sfRole": "<Optional Your Snowflake Role>", "sfUser": "<Your Username>", "sfPassword": "<Your Password>" }snowflake_df = spark.read.format("snowflake").options(**options).option("dbtable", "<Your Snowflake Table>").load() ```Similarly, you can use the.writemethod to store files into Snowflake once they are processed and loaded by Auto Loader. -
Set Up File Tracking Using Auto Loader:
Auto Loader inherently tracks file ingestion progress by maintaining metadata in its checkpoint location. This ensures exactly-once ingestion and fault tolerance when processing files. However, since you wish to track this file metadata in Snowflake:- You can capture the file metadata (such as file name, timestamp, and status) during ingestion via Auto Loader.
- Write this metadata to a tracking table in Snowflake using the Snowflake connector.
For example, while using Auto Loader: ```python from pyspark.sql.functions import input_file_name# Load files with Auto Loader df = (spark.readStream .format("cloudFiles") .option("cloudFiles.format", "csv") .load("<Your Cloud Storage Path>") .withColumn("source_file", input_file_name())) # Capture file information# Write DataFrame to Snowflake (assumingdfnow has both file records and metadata) df.write.format("snowflake").options(**options).option("dbtable", "<Snowflake Tracking Table>").save() ``` -
Advantages of Track File Metadata in Snowflake:
By leveraging Snowflake's capabilities as the target system, you can:- Query file tracking data for auditing purposes.
- Join the tracking table with the actual stage table to ensure that all files are accounted for and processed correctly.
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05-01-2025 08:55 AM
I am trying to connect Snowflake to databricks using Secret scope. I do not have username and password to the snowflake.
Can you pls suggest on this.
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04-30-2025 09:24 PM
Thanks for your response , will try and let you know