Implement reusable Heatmap chart with Event Deltas support

[alex-fedotyev]

Summary

This update hardens the heatmap + event-deltas query path to avoid invalid SQL generation in delta mode on trace/demo data.

• Sanitizes timestampValueExpression before passing config into DBDeltaChart so trailing AS ... aliases are not reused in grouped clauses.
• Prevents DBDeltaChart from inheriting incompatible chart fields by overriding the shared config in DBHeatmapWithDeltasChart:
  • with: undefined
  • select: 'tuple(_part, _part_offset)'
  • groupBy: undefined
  • having: undefined
  • granularity: undefined
• Adds focused unit coverage for timestamp alias sanitization in DBHeatmapWithDeltasChart.
• Updates chart preview test mocking to keep heatmap preview assertions aligned with the composite component behavior.

Screenshots or video

Will attach updated end-to-end verification artifacts in a follow-up after Playwright/manual validation confirms rendered heatmap data in both:

• Chart Explorer heatmap path
• Dashboard tile heatmap path

How to test locally or on Vercel

1. Open the PR preview deployment and create/login to an account (random credentials are fine on fresh demo env).
2. In Search/Chart explorer, switch to Heatmap and run on demo trace data; verify the heatmap renders and no GROUP BY ... AS __hdx_time_bucket / SpanId not under aggregate error appears.
3. Add a dashboard tile using Heatmap from the same dataset and verify the tile renders actual heatmap data.

References

• Linear Issue: HDX-3993
• Related PRs:

Linear Issue: HDX-3993

  

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Project	Deployment	Actions	Updated (UTC)
hyperdx-oss	Ready	Preview, Comment	Apr 11, 2026 1:16am

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Latest commit: 07de447

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E2E Test Results

✅ All tests passed • 130 passed • 3 skipped • 1049s

Status	Count
✅ Passed	130
❌ Failed	0
⚠️ Flaky	3
⏭️ Skipped	3

Tests ran across 4 shards in parallel.

View full report →