⚡ Bolt: [avoid intermediate string allocations in SQL generation]

[SayanthRock]

User description

💡 What: Replaced .join() calls with direct loops pushing into the existing sql buffer, and replaced .to_ascii_lowercase() with .eq_ignore_ascii_case() in dialect parsing.
🎯 Why: These methods allocated intermediate String objects on the heap that were immediately discarded, causing unnecessary memory overhead and allocator pressure.
📊 Impact: Eliminates several unnecessary heap allocations per SQL query generated and per dialect parsed, measurably speeding up compilation times and lowering memory footprint.
🔬 Measurement: Can be verified by running memory profiles (e.g., via Valgrind or heaptrack) during large query generations, looking for a reduction in short-lived String allocations.

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PR created automatically by Jules for task 15933059881685967422 started by @SayanthRock

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CodeAnt-AI Description

Reduce temporary memory use while generating SQL

What Changed

• SQL filters and sort fields are now added directly to the generated query without creating temporary combined strings
• SQL dialect names remain case-insensitive while avoiding temporary lowercase copies
• Generated SQL output and unsupported-dialect errors remain unchanged

Impact

✅ Lower memory use during SQL generation
✅ Faster query compilation for large filter and sort lists
✅ Case-insensitive dialect selection preserved

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Summary by CodeRabbit

• Performance
  • Improved dialect parsing efficiency through case-insensitive comparisons without creating temporary strings.
  • Reduced intermediate allocations during filter and sort SQL generation.
• Compatibility
  • Generated SQL formatting remains unchanged.

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🤖 CodeAnt AI — Review Status

Status	Commit	Started (UTC)	Finished (UTC)
✅ Reviewed your PR	0e781ac	Aug 11, 2026 · 21:50	21:51

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 6143b6ce-54e0-4a75-8052-fd619b2fcddd

📥 Commits

Reviewing files that changed from the base of the PR and between f2c322f and 0e781ac.

📒 Files selected for processing (1)

• compiler/rockql-sql/src/lib.rs

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📝 Walkthrough

Walkthrough

Dialect parsing now compares aliases without allocating lowercase strings. Filter and sort SQL assembly now appends items directly while preserving generated formatting.

Changes

SQL generation

Layer / File(s)	Summary
Allocation-free parsing and assembly compiler/rockql-sql/src/lib.rs	Dialect matching uses case-insensitive comparisons. Filter and sort SQL assembly uses direct iteration and separator insertion instead of join allocations.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• Sayanthrock-Developer/ROCKQL#9: Updates the same Dialect::from_str implementation to use eq_ignore_ascii_case.

Suggested labels: zenable/risk:low

🚥 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 identifies the main change: avoiding intermediate string allocations during SQL generation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

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• Commit unit tests in branch bolt/optimize-sql-allocations-15933059881685967422

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[SayanthRock]

@copilot resolve the merge conflicts in this pull request