⚡ Bolt: Fix N+1 query bottleneck in CSV prompt imports#140
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- Pre-fetch existing prompt titles from CSV batch - Use Set for O(1) lookups during iteration - Add newly processed titles to Set to avoid inserting duplicates from CSV - Reduce DB queries from O(N) to O(1) batched query Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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- Map DATABASE_URL to DIRECT_URL during CI schema build steps when DIRECT_URL is missing - Remove static placeholder URL from datasource block to avoid hanging deployment steps Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
- Add DATABASE_URL to DIRECT_URL fallback for CI builds to prevent hanging deployments - Define empty datasource URL block correctly to satisfy SchemaEngineConfigClassic type requirements - Use non-null assertion to satisfy typescript without hardcoding a dummy database placeholder Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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💡 What
Replaced a sequential
findFirstdatabase query inside the CSV import loop with a single batchedfindManyquery before the loop starts. The results are mapped to aSetforO(1)lookups.🎯 Why
During CSV prompt imports, the previous implementation executed an individual
findFirstquery for every single row in the CSV file to check if a prompt with that title already existed. For a CSV with 1,000 rows, this meant 1,000 sequential database queries, creating a massive N+1 performance bottleneck.📊 Impact
O(N)(one per row) toO(1)(one batched query).O(N)DB lookups toO(1)in-memory Set lookups.🔬 Measurement
Run an import via the CSV import endpoint with a large file (e.g., hundreds of rows). Previously this would take several seconds to minutes; now it should process almost instantly as all existence checks are resolved in memory after a single database fetch.
PR created automatically by Jules for task 3853434278448843405 started by @billlzzz10
Summary by cubic
Removed the N+1 query in CSV prompt imports by batching a single
findManyand using aSetfor O(1) title checks. Also fixed Prisma CI env resolution by mappingDATABASE_URLtoDIRECT_URLand removing the placeholder datasource URL to prevent hanging schema builds.prisma.config.ts, fallbackDIRECT_URLtoDATABASE_URLand use a non-null assertion fordatasource.urlto avoid dummy URLs and stabilize CI schema builds.Written for commit 1139898. Summary will update on new commits.