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Goal Determine the exact behavior of Firestore's import operation when restoring data into a database that already contains collections with overlapping document IDs. Constraints Firestore 2026.1 export files are stored in GCS, and imports are performed via gcloud CLI or Firebase Console. The import process is asynchronous and may merge or overwrite data, bu
Goal Bound a large Firestore collection in a Flutter app and page through it using limit() with startAfterDocument() , while keeping a real-time listener active on the initial page. Constraints Firestore pagination requires a deterministic ordering field backed by a matching index, and startAfterDocument() depends on that order staying identical between page
Goal Determine whether enabling Firestore persistence with enablePersistence() results in a single shared IndexedDB cache across multiple tabs when the application is used in Safari private browsing mode, given that the SDK attempts to share persistence via a shared worker but sharing is not guaranteed across all browsers. Constraints include the variability
Goal: Keep commit latency predictable for a single Firestore document targeted by many concurrent clients while preserving application invariants. Firestore transactions use optimistic concurrency control and retry aborted commits with backoff, so tail latency appears only under contention. Atomic field transforms and sharded writes avoid read-modify-write c
I need to retrieve a specific page of results from a Firestore collection ordered by population, while restricting the results to a defined lower and upper population bound (e.g., between 1,000,000 and 5,000,000). The collection is large and frequently updated, so I want to avoid reading all preceding pages to reach the desired page. I plan to use query curs
firebase
flutter