report-stream-export

Export large data reports in NestJS without memory bottlenecks by streaming database records directly into CSV, ExcelJS, or PDF pipelines using TypeORM's $stream({ usePgQueryStream: true }), avoiding loading entire datasets into memory.

SSE progress tracking for big data report exports works by using a dedicated SSE endpoint to push real-time status, progress percentages, and final download paths to the client while the streaming pipeline processes the data.

Yes, you can generate multi-sheet Excel exports using a template-driven streaming pipeline. The approach supports ExcelJS to handle multi-sheet workflows and push-to-file operations for enterprise reporting needs.

TypeORM $stream supports real-time progress updates during CSV exports by piping the query stream through the export pipeline while an SSE endpoint pushes progress statuses and final download paths to the client.

The best way to handle big data PDF exports in a NestJS application is to use a template-driven streaming pipeline with TypeORM's $stream({ usePgQueryStream: true }), preventing memory bottlenecks by processing chunks sequentially.