Pydantic Support for Snowflake DSN format (Fix)

The Fix

pip install pydantic==1.10.18

Based on closed pydantic/pydantic issue #10079 · PR/commit linked

Jump to Verify Open PR/Commit

@@ -134,6 +134,7 @@
     'MariaDBDsn',
     'ClickHouseDsn',
+    'SnowflakeDsn',
     'validate_email',
     # root_model

repro.py

engine = create_engine(
    'snowflake://{user}:{password}@{account_identifier}/'.format(
        user='<user_login_name>',
        password='<password>',
        account_identifier='<account_identifier>',
    )
)

verify

Re-run the minimal reproduction on your broken version, then apply the fix and re-run.

fix.md

Option A — Upgrade to fixed release\npip install pydantic==1.10.18\nWhen NOT to use: Do not use this fix if your application does not require Snowflake DSN support.\n\n

Why This Fix Works in Production

Trigger: It seems like this is something that is straightforward to define within my project, so if this doesn't make sense to add to Pydantic I have no concerns - I…
Mechanism: Missing DSN type for Snowflake in Pydantic's network types
Why the fix works: Adds support for the Snowflake DSN format to Pydantic's network types. (first fixed release: 1.10.18).

Why This Breaks in Prod

Missing DSN type for Snowflake in Pydantic's network types
Production symptom (often without a traceback): It seems like this is something that is straightforward to define within my project, so if this doesn't make sense to add to Pydantic I have no concerns - I assume I would start from something like this:

Proof / Evidence

GitHub issue: #10079
Fix PR: https://github.com/pydantic/pydantic/pull/10128
First fixed release: 1.10.18
Reproduced locally: No (not executed)
Last verified: 2026-02-09
Confidence: 0.85
Did this fix it?: Yes (upstream fix exists)
Own content ratio: 0.64

Discussion

High-signal excerpts from the issue thread (symptoms, repros, edge-cases).

Jump to Sources Open on GitHub

“@sydney-runkle if no one is working on it, Could you please assign this to me ?”

@aditkumar72 · 2024-08-10 · source

“Hi @aditkumar72 are you still working on it? i have my PR ready if youre not then let me know thanks.”

@Vasanth-96 · 2024-08-13 · source

“@Vasanth-96, go ahead and submit your PR, I can review tomorrow :)”

@sydney-runkle · 2024-08-14 · source

Failure Signature (Search String)

It seems like this is something that is straightforward to define within my project, so if this doesn't make sense to add to Pydantic I have no concerns - I assume I would start
- [ ] [Compatibility between releases](https://docs.pydantic.dev/changelog/)

Copy-friendly signature

signature.txt

Failure Signature
-----------------
It seems like this is something that is straightforward to define within my project, so if this doesn't make sense to add to Pydantic I have no concerns - I assume I would start from something like this:
- [ ] [Compatibility between releases](https://docs.pydantic.dev/changelog/)

Error Message

Signature-only (no traceback captured)

error.txt

Error Message
-------------
It seems like this is something that is straightforward to define within my project, so if this doesn't make sense to add to Pydantic I have no concerns - I assume I would start from something like this:
- [ ] [Compatibility between releases](https://docs.pydantic.dev/changelog/)

Minimal Reproduction

repro.py

engine = create_engine(
    'snowflake://{user}:{password}@{account_identifier}/'.format(
        user='<user_login_name>',
        password='<password>',
        account_identifier='<account_identifier>',
    )
)

What Broke

Users cannot validate or parse Snowflake DSN formats, leading to integration issues.

Why It Broke

Missing DSN type for Snowflake in Pydantic's network types

Fix Options (Details)

Option A — Upgrade to fixed release Safe default (recommended)

pip install pydantic==1.10.18

When NOT to use: Do not use this fix if your application does not require Snowflake DSN support.

Use when you can deploy the upstream fix. It is usually lower-risk than long-lived workarounds.

Fix reference: https://github.com/pydantic/pydantic/pull/10128

First fixed release: 1.10.18

Last verified: 2026-02-09. Validate in your environment.

When NOT to Use This Fix

Do not use this fix if your application does not require Snowflake DSN support.

Verify Fix

verify

Re-run the minimal reproduction on your broken version, then apply the fix and re-run.

Did This Fix Work in Your Case?

Quick signal helps us prioritize which fixes to verify and improve.

Prevention

Add a CI check that diffs key outputs after upgrades (OpenAPI schema snapshots, JSON payload shapes, CLI output).
Upgrade behind a canary and run integration tests against the canary before 100% rollout.

Version Compatibility Table

Version	Status
1.10.18	Fixed

Related Issues

No related fixes found.

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Sources

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