fix: handle overlapping subset queries returning same row with different values #1070
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
…ent values When multiple subset queries return the same row (e.g., different WHERE clauses that both match the same record), the server sends `insert` operations for each response. If the row's data changed between requests (e.g., timestamp field updated), this caused a DuplicateKeySyncError because TanStack DB's sync layer throws when inserting an existing key with a different value. This fix tracks synced keys in the Electric adapter and converts subsequent `insert` operations to `update` for keys that have already been synced. The tracked keys are cleared on truncate/must-refetch to stay in sync with the collection state. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
🦋 Changeset detectedLatest commit: bf94daf The changes in this PR will be included in the next version bump. This PR includes changesets to release 1 package
Not sure what this means? Click here to learn what changesets are. Click here if you're a maintainer who wants to add another changeset to this PR |
More templates
@tanstack/angular-db
@tanstack/db
@tanstack/db-ivm
@tanstack/electric-db-collection
@tanstack/offline-transactions
@tanstack/powersync-db-collection
@tanstack/query-db-collection
@tanstack/react-db
@tanstack/rxdb-db-collection
@tanstack/solid-db
@tanstack/svelte-db
@tanstack/trailbase-db-collection
@tanstack/vue-db
commit: |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
When multiple subset queries return the same row (e.g., different WHERE clauses that both match the same record), the server sends
insertoperations for each response. If there's a race condition and the row's data changed between requests (e.g., timestamp field updated), this caused a DuplicateKeySyncError because TanStack DB's sync layer throws when inserting an existing key with a different value.This fix tracks synced keys in the Electric adapter and converts subsequent
insertoperations toupdatefor keys that have already been synced. The tracked keys are cleared on truncate/must-refetch to stay in sync with the collection state.Note: this might be against the original assumptions of the codebase, so perhaps there's a more reliable way to fix this instead of converting
inserttoupdate. Making this PR as a starting point.🤖 Generated with Claude Code
🚀 Release Impact