feat: add migration scripts for otel_spans_by_trace table and materialized view by JivusAyrus · Pull Request #3186 · wundergraph/cosmo

JivusAyrus · 2026-08-25T07:18:35Z

Summary by CodeRabbit

New Features
- Added trace-oriented span storage to improve observability.
- Added automatic indexing of spans associated with federated graphs.
- Captures trace and span identifiers, timing, status, service metadata, scopes, and attributes.
- Organizes spans for efficient trace-based queries.
- Retains trace data for 30 days.
- Excludes spans that cannot be associated with a federated graph.

Checklist

I have discussed my proposed changes in an issue and have received approval to proceed.
I have followed the coding standards of the project.
Tests or benchmarks have been added or updated.
If applicable, I have provided instructions for reviewers for manually validating my changes.
Documentation has been updated on https://github.com/wundergraph/docs-website.
I have read the Contributors Guide.

Similar to the previous clickhouse pr, we are adding the tables so they get populated for the next 30 days. Once the data is filled we change the code to use these tables

…lized view

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coderabbitai · 2026-08-25T07:20:59Z

No actionable comments were generated in the recent review. 🎉

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controlplane/clickhouse/migrations/20260707090831_otel_spans_by_trace.sql

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Walkthrough

The migrations add a trace-oriented ClickHouse table for OpenTelemetry spans and a materialized view that populates it from cosmo.otel_traces for federated graphs. Both migrations include rollback statements.

Changes

OpenTelemetry span storage

Layer / File(s)	Summary
Span table storage `controlplane/clickhouse/migrations/20260707090831_otel_spans_by_trace.sql`	Creates `otel_spans_by_trace` with trace, span, metadata, status, scope, and attribute fields. It uses daily partitions, trace-oriented ordering, and a 30-day TTL. The rollback drops the table when present.
Span ingestion view `controlplane/clickhouse/migrations/20260707090832_otel_spans_by_trace_mv.sql`	Creates `otel_spans_by_trace_mv` to select federated graph spans from `cosmo.otel_traces` and populate `cosmo.otel_spans_by_trace`. The rollback drops the view.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: ⚪ Minimal · up to b5209

This PR adds ClickHouse migrations for the trace-span table and materialized view; no actionable merge-blocking risk remains after normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the addition of migration scripts for the `otel_spans_by_trace` table and materialized view, which matches the main changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)

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Actionable comments posted: 1

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Inline comments:
In `@controlplane/clickhouse/migrations/20260707090831_otel_spans_by_trace.sql`:
- Line 3: Update the CREATE TABLE statement for otel_spans_by_trace to use the
fully qualified cosmo.otel_spans_by_trace name, matching the materialized view
target regardless of the configured ClickHouse database.

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📒 Files selected for processing (2)

controlplane/clickhouse/migrations/20260707090831_otel_spans_by_trace.sql
controlplane/clickhouse/migrations/20260707090832_otel_spans_by_trace_mv.sql

Included review availability: 4 reviews are currently available. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour.

…zed view migration

codecov · 2026-08-25T07:49:05Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.35%. Comparing base (8d60ddb) to head (6df3ffa).

Additional details and impacted files

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  Coverage   71.35%   71.35%           
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  Files         336      336           
  Lines       49535    49535           
  Branches     6116     6116           
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  Hits        35345    35345           
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feat: add migration scripts for otel_spans_by_trace table and materia…

d5c44c3

…lized view

JivusAyrus requested a review from a team as a code owner August 25, 2026 07:18

claude Bot reviewed Aug 25, 2026

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github-actions Bot added the controlplane label Aug 25, 2026

coderabbitai Bot reviewed Aug 25, 2026

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Comment thread controlplane/clickhouse/migrations/20260707090831_otel_spans_by_trace.sql Outdated

refactor: remove outdated comments from otel_spans_by_trace materiali…

5531b30

…zed view migration

JivusAyrus added 4 commits August 28, 2026 19:04

Merge branch 'main' into suvij/cosmo-75-optimize-gettrace-operation

62cc64c

fix: specify schema for otel_spans_by_trace table creation

a4f9638

Merge branch 'main' into suvij/cosmo-75-optimize-gettrace-operation

b520937

Merge branch 'main' into suvij/cosmo-75-optimize-gettrace-operation

6df3ffa

comatory approved these changes Aug 31, 2026

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Comment thread controlplane/clickhouse/migrations/20260707090831_otel_spans_by_trace.sql

Comment thread controlplane/clickhouse/migrations/20260707090831_otel_spans_by_trace.sql

Comment thread controlplane/clickhouse/migrations/20260707090832_otel_spans_by_trace_mv.sql

JivusAyrus merged commit 5f85878 into main Aug 31, 2026
12 checks passed

JivusAyrus deleted the suvij/cosmo-75-optimize-gettrace-operation branch August 31, 2026 10:36

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feat: add migration scripts for otel_spans_by_trace table and materialized view - #3186

feat: add migration scripts for otel_spans_by_trace table and materialized view#3186
JivusAyrus merged 6 commits into
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suvij/cosmo-75-optimize-gettrace-operation

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