fix: Update Services Dashboard count() queries to correctly use MVs

[pulpdrew]

Closes HDX-3057

This PR updates the Request Error Rate query config so that it can correctly leverage materialized views.

[changeset-bot]

🦋 Changeset detected

Latest commit: 45a1fc8

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@hyperdx/app	Patch
@hyperdx/api	Patch

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Project	Deployment	Review	Updated (UTC)
hyperdx-v2-oss-app	Ready	Preview, Comment	Dec 15, 2025 2:32pm

[claude]

Code Review

✅ No critical issues found.

Changes are solid:

• Correctly refactors error rate calculation to enable materialized view optimization
• Splits countIf() / count() into separate aggregations (total_requests, error_requests) then divides
• Properly uses aggCondition with aggConditionLanguage: sql for the error condition
• Correctly hides intermediate series (hiddenSeries prop) to only show final error_rate
• Consistent pattern applied in both HTTP and Errors tabs
• Follows existing codebase patterns for aggFn: count usage

The approach matches ClickHouse MV best practices by separating aggregations from calculations.

[github-actions]

E2E Test Results

✅ All tests passed • 46 passed • 3 skipped • 254s

Status	Count
✅ Passed	46
❌ Failed	0
⚠️ Flaky	0
⏭️ Skipped	3

View full report →

[knudtty]

approve with 1 nit

[knudtty]

nit: is valueExpression needed here anymore? Could it just be left out?

[pulpdrew]

It is unfortunately required to satisfy the current types. We could potentially introduce an additional union item here to support an undefined valueExpression for aggFn: 'count'