@dudousxd/nestjs-telescope/dist/query/n-plus-one.js

Laravel Telescope-style observability console for NestJS — core: watchers, recorder, correlation, SQLite store, headless API.

// packages/core/src/query/n-plus-one.ts
import { EntryType } from '../entry/entry.js';
/** Group query entries by familyHash; report templates run >= threshold times. */
export function detectNPlusOne(entries, threshold) {
    const groups = new Map();
    for (const entry of entries) {
        if (entry.type !== EntryType.Query || entry.familyHash === null)
            continue;
        const record = typeof entry.content === 'object' && entry.content !== null
            ? entry.content
            : null;
        const sql = record !== null && typeof record.sql === 'string' ? record.sql : '';
        const existing = groups.get(entry.familyHash);
        if (existing) {
            existing.count += 1;
        }
        else {
            groups.set(entry.familyHash, { count: 1, sql });
        }
    }
    const insights = [];
    for (const [familyHash, group] of groups) {
        if (group.count >= threshold) {
            insights.push({ familyHash, count: group.count, sql: group.sql });
        }
    }
    return insights;
}
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