⚡️ perf(database): missing user_id and user_memory_id index
#10643
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Reviewer's guide (collapsed on small PRs)Reviewer's GuideAdds missing btree indexes on user_id and user_memory_id across user memories tables while removing two unused HNSW vector indexes, and wires the changes into the SQL and schema metadata migrations. Entity relationship diagram for updated user memories indexeserDiagram
user_memories {
int id
int user_id_indexed
vector summary_vector_1024
vector details_vector_1024
}
user_memories_contexts {
int id
int user_id_indexed
int user_memory_id
text type
vector description_vector
}
user_memories_preferences {
int id
int user_id_indexed
int user_memory_id_indexed
vector conclusion_directives_vector
}
user_memories_identities {
int id
int user_id_indexed
int user_memory_id_indexed
text type
vector description_vector
}
user_memories_experiences {
int id
int user_id_indexed
int user_memory_id_indexed
text type
vector key_learning_vector
}
user_memories ||--o{ user_memories_contexts : user_memory_id
user_memories ||--o{ user_memories_preferences : user_memory_id
user_memories ||--o{ user_memories_identities : user_memory_id
user_memories ||--o{ user_memories_experiences : user_memory_id
user_memories ||--o{ user_memories_contexts : user_id
user_memories ||--o{ user_memories_preferences : user_id
user_memories ||--o{ user_memories_identities : user_id
user_memories ||--o{ user_memories_experiences : user_id
Flow diagram for migration 0060 index changesflowchart TD
A[start_migration_0060] --> B[drop_index_user_memories_summary_vector_1024_index]
B --> C[drop_index_user_memories_details_vector_1024_index]
C --> D[create_index_user_memories_user_id_index_btree]
D --> E[create_index_user_memories_contexts_user_id_index_btree]
E --> F[create_index_user_memories_experiences_user_id_index_btree]
F --> G[create_index_user_memories_experiences_user_memory_id_index_btree]
G --> H[create_index_user_memories_identities_user_id_index_btree]
H --> I[create_index_user_memories_identities_user_memory_id_index_btree]
I --> J[create_index_user_memories_preferences_user_id_index_btree]
J --> K[create_index_user_memories_preferences_user_memory_id_index_btree]
K --> L[end_migration_0060]
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Hey there - I've reviewed your changes - here's some feedback:
- The migration drops
user_memories_*_vector_1024_indexwithoutIF EXISTS; to make repeated or partially-applied migrations safer, consider usingDROP INDEX IF EXISTSfor these two vector indexes as well. - Given you now have separate
user_idandtypeindexes on several tables, if common queries filter on both fields together it may be worth changing these to composite indexes (e.g.(user_id, type)) to better match the access patterns. - By fully removing the HNSW vector indexes from
user_memories, any remaining vector similarity queries on that table will fall back to sequential scans; if those queries are still in use, consider whether a different indexing strategy or relocation of vector search is needed rather than a full removal.
Prompt for AI Agents
Please address the comments from this code review:
## Overall Comments
- The migration drops `user_memories_*_vector_1024_index` without `IF EXISTS`; to make repeated or partially-applied migrations safer, consider using `DROP INDEX IF EXISTS` for these two vector indexes as well.
- Given you now have separate `user_id` and `type` indexes on several tables, if common queries filter on both fields together it may be worth changing these to composite indexes (e.g. `(user_id, type)`) to better match the access patterns.
- By fully removing the HNSW vector indexes from `user_memories`, any remaining vector similarity queries on that table will fall back to sequential scans; if those queries are still in use, consider whether a different indexing strategy or relocation of vector search is needed rather than a full removal.
## Individual Comments
### Comment 1
<location> `packages/database/migrations/0060_add_user_memory_user_id_index.sql:1-2` </location>
<code_context>
+DROP INDEX "user_memories_summary_vector_1024_index";--> statement-breakpoint
+DROP INDEX "user_memories_details_vector_1024_index";--> statement-breakpoint
+CREATE INDEX IF NOT EXISTS "user_memories_user_id_index" ON "user_memories" USING btree ("user_id");--> statement-breakpoint
+CREATE INDEX IF NOT EXISTS "user_memories_contexts_user_id_index" ON "user_memories_contexts" USING btree ("user_id");--> statement-breakpoint
</code_context>
<issue_to_address>
**issue:** Use `IF EXISTS` for `DROP INDEX` to make the migration more robust across environments.
These `DROP INDEX` statements will error if the indexes were never created or were removed manually in some environments, causing the migration to fail. Using `DROP INDEX IF EXISTS` keeps the migration idempotent and safe on partially migrated or manually modified databases.
</issue_to_address>Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.
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| DROP INDEX "user_memories_summary_vector_1024_index";--> statement-breakpoint | ||
| DROP INDEX "user_memories_details_vector_1024_index";--> statement-breakpoint |
Contributor
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issue: Use IF EXISTS for DROP INDEX to make the migration more robust across environments.
These DROP INDEX statements will error if the indexes were never created or were removed manually in some environments, causing the migration to fail. Using DROP INDEX IF EXISTS keeps the migration idempotent and safe on partially migrated or manually modified databases.
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Summary by Sourcery
Optimize user memory-related database queries by adjusting indexes on user and user_memory identifiers.
Enhancements: