SNOW-2097586: Add Debug mode for eager evaluation#3380
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sfc-gh-jrose merged 15 commits intomainfrom Jun 20, 2025
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Which Jira issue is this PR addressing? Make sure that there is an accompanying issue to your PR.
Fixes SNOW-2097586
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Please describe how your code solves the related issue.
This PR adds a new debug mode to sessions. Currently the only difference in debug mode is that dataframe attributes are populated on Dataframe creation instead of lazily, but in the future other features may be added. This change is done as a separate mode in order to avoid the additional describe queries for production pipelines.
The side effect of this change is that errors related to the dataframe schema become apparent on the line of code that caused them rather than on whatever line evaluates the dataframe. I've also modified the exception wrapper for column identifiers to not modify the error message if no additional context is available.
Here's an example of how the user experience changes: