[ryuzdev]

User report (2026-10-28): D1 preview 502s on pacjent-crm (/console?app=pacjent-crm&t=d1).

Root cause, reproduced live against prod celld 0.6.2: celld d1 execute refuses 6+ UNION ALL terms (D1_EXEC_ERROR: too many terms in compound SELECT; without a trailing semicolon the message misleadingly says "incomplete statement"). The D1 tables view runs one SELECT … UNION ALL … over every visible table, so any app with 6+ visible tables 502s. pacjent-crm has 7 (photos, task, credential, patient, account, session, challenge) since its 4th migration. Verified term count, not content: 5 pure-constant unions pass, 6+ fail regardless of tables.

Fix: MAX_UNION_TERMS = 5; table_count_queries chunks the table list; list_tables runs one exec per chunk and merges counts. build_table_counts asserts its input fits one exec so the next person to reuse it chunks first.

Live on prod (outer:e49693f, throwaway account, deleted after): the exact 7-table counts query fails as one exec; the 5+2 chunked execs both succeed.

Tests: new table_counts_chunk_at_the_celld_union_limit (0/1/5/7 tables, per-exec term cap, every table counted once); full suite 1103 + 7 green. No migration.

Summary by CodeRabbit

• Bug Fixes
  • Table row counts now load more reliably for databases with many tables. Counts are gathered in smaller batches and combined, so larger table lists can be counted without relying on a single query to handle every table. The displayed counts continue to cover all tables across the database.

[coderabbitai]

No actionable comments were generated in the recent review.

Recent review info

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• Plan: Advanced
• Run ID: 9fa363d0-577f-46c8-a19b-8227f39de4fa

Commits

Reviewing files that changed from the base of the PR and between 7a0f2c6 and e49693f.

Files selected for processing: 1

• crates/outer/src/http/console_data/d1.rs

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Walkthrough

Table-count queries now contain no more than five tables. list_tables executes the generated queries and accumulates their counts.

Changes: Table count query flow

Layer / File(s)	Summary
Query size limit and chunking crates/outer/src/http/console_data/d1.rs	build_table_counts rejects inputs with more than five tables. table_count_queries builds queries for chunks of up to five tables.
Execute chunks and test boundaries crates/outer/src/http/console_data/d1.rs	list_tables executes each generated query. The documentation describes multiple queries, and tests cover empty input, chunk boundaries, query sizes, table order, and coverage.

Priority: Normal

Estimated code review effort: 2 (Simple) | ~8 minutes

Change: Bug fix

Merge Risk: Minimal · up to e4969

The chunked table-count implementation appears mergeable with no identified behavior or availability risk.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documenta…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: chunking D1 table row-count queries at the celld UNION limit.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 3 functions across 1 files.

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

Finishing Touches: 💡 1

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