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Resolving jinja2.exceptions.TemplateSyntaxError in Airflow's Snowflake Operator
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Learn how to fix the unexpected token error in Jinja2 templates when using Airflow's Snowflake Operator with dynamic task ids.
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If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
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The Problem
In your case, the error occurred while trying to use an xcom_pull function inside an SQL phrase executed by a Snowflake operator in Airflow. Here's a breakdown of what you initially attempted:
The Python Code
You had a script that defined a SnowflakeOperator and attempted to include a SQL file using Jinja2 templating:
[[See Video to Reveal this Text or Code Snippet]]
The SQL Code and Error Message
[[See Video to Reveal this Text or Code Snippet]]
The error message specified that there was a syntax issue in the template processing:
[[See Video to Reveal this Text or Code Snippet]]
The Solution
After diagnosing the problem, it became evident that the syntax used for Jinja2 templating was incorrect. Here’s the correct syntax that resolves the issue:
[[See Video to Reveal this Text or Code Snippet]]
Breaking Down the Correction
Remove Extra Braces: The original code included multiple curly braces that were not needed. This caused the Jinja2 templating engine to throw an error due to unexpected tokens.
Correct String Formatting: Use the .format() method correctly without additional curly braces around it so the task ID is built properly without confusion.
Testing the Change: After applying the correction, running your Airflow pipeline should execute the SQL command successfully without throwing a syntax error.
Conclusion
Debugging Jinja2 template syntax errors can be tricky, especially when you're working with dynamic strings in your SQL codes, as is common with Airflow. By following the steps outlined in this guide, you should be able to resolve the unexpected token errors and ensure your SnowflakeOperator functions as intended.
Don't hesitate to reach out for more tips on working with Airflow and Snowflake, or share any of your experiences in the comments below!
---
If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
The Problem
In your case, the error occurred while trying to use an xcom_pull function inside an SQL phrase executed by a Snowflake operator in Airflow. Here's a breakdown of what you initially attempted:
The Python Code
You had a script that defined a SnowflakeOperator and attempted to include a SQL file using Jinja2 templating:
[[See Video to Reveal this Text or Code Snippet]]
The SQL Code and Error Message
[[See Video to Reveal this Text or Code Snippet]]
The error message specified that there was a syntax issue in the template processing:
[[See Video to Reveal this Text or Code Snippet]]
The Solution
After diagnosing the problem, it became evident that the syntax used for Jinja2 templating was incorrect. Here’s the correct syntax that resolves the issue:
[[See Video to Reveal this Text or Code Snippet]]
Breaking Down the Correction
Remove Extra Braces: The original code included multiple curly braces that were not needed. This caused the Jinja2 templating engine to throw an error due to unexpected tokens.
Correct String Formatting: Use the .format() method correctly without additional curly braces around it so the task ID is built properly without confusion.
Testing the Change: After applying the correction, running your Airflow pipeline should execute the SQL command successfully without throwing a syntax error.
Conclusion
Debugging Jinja2 template syntax errors can be tricky, especially when you're working with dynamic strings in your SQL codes, as is common with Airflow. By following the steps outlined in this guide, you should be able to resolve the unexpected token errors and ensure your SnowflakeOperator functions as intended.
Don't hesitate to reach out for more tips on working with Airflow and Snowflake, or share any of your experiences in the comments below!