feat: add AI query optimization feature#56
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- Add aiController with getQueryOptimization handler - Add queryOptimizationService to call OpenAI GPT-4o with query and metrics - Add schemaService to fetch table names and schema context from user DB - Add schemaUtils to format schema for GPT prompt - Add sqlParserUtils for AST column ref and alias extraction - Add validateQuery to ensure only SELECT queries are optimized - Add optimizationLimiter rate limiting middleware - Add POST /query/optimization route - Add openai, node-sql-parser, express-rate-limit dependencies
- Add isQueryLoaded prop to TestQueryForm to lock fields and disable submit when query is loaded - Add Optimize Query with AI button with loading state - Add OptimizationResultCard component to display suggested query, explanation, and load into tester - Add handleNewQuery to reset query state - Add auto-scroll to optimization result on load
… handling - Pre-compute rounded metric values to avoid repeated toFixed calls - Add color coding to performance summary (green/red/grey) - Handle equal metric values with No difference label - Improve query recommendation caption to show "Queries are equivalent" when metrics are equal
…trics - Add warmup run before EXPLAIN ANALYZE to reflect steady state cache performance - Fix shared hit/read blocks to read from Plan node instead of Planning node - removed queryAnalysisService
…ry is active - Add isQueryLoaded prop to make Query Name and Query fields read-only when loaded - Disable submit button when query is already loaded - Update tooltip to guide user to click New Query when fields are locked - Reduce bottom margin from mb:4 to mb:2
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wmoew
approved these changes
May 23, 2026
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Description
Adds an AI-powered query optimization feature that analyzes a user's SQL query alongside its performance metrics and database schema context to suggest an improved version. Improved the QueryComparisonPage with color coding, no-difference handling, and a performance bar chart.
Reproduction steps
Testing AI Optimization on a new query:
4. Enter your database URI, query name, and a SQL query, then click Fetch Metrics
5. Once metrics appear, click "Optimize Query with AI"
6. The AI will analyze your query and return a suggested optimized version with an explanation
7. Click "Load into Tester" to load the suggested query back into the form and re-run it
Testing AI Optimization on a past query:
8. Click Query History and load a previous query
9. Re-enter your database URI in the Database URI field (we don't save the URI for security)
10. The "Optimize Query with AI" button will now be clickable — click it to get an AI suggestion
Checklist