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LOQL is a Splunk-SPL-shaped pipeline language (search | stats | timechart | ...) that
compiles to PARAMETERIZED SQL over the month-partitioned events table — the first
backbone of the Splunk-class transformation (docs/SPLUNK_TRANSFORMATION_ROADMAP.md).
Analyst hunting, and later dashboards/RBA row-filters/federation, all hang off this
compiler.
New pure package app/loql/:
- nodes.py frozen AST contract
- parser.py lexer + recursive-descent parser — the security gate (malformed -> LoqlError)
- compiler.py pure Query -> (sql, params) CTE chain; EVERY user value/jsonb key/glob is a
bound %s param and identifiers pass _ident() — the whole injection story
- run.py DB execution boundary + guardrails (statement_timeout + row cap)
Batch-1 commands: search where eval fields rename sort head dedup stats top rare bin
timechart, with stats/timechart funcs (count/sum/avg/min/max/dc/values/list), schema-on-read
over raw jsonb, relative-time (_time > "-24h") and wildcard (host="web*") matching.
POST /api/v1/query (API-key auth) + config guardrails LOQL_DEFAULT_LIMIT / LOQL_MAX_ROWS /
LOQL_TIMEOUT_MS / LOQL_MAX_AGG_ELEMS so one heavy query can't starve ingest on the shared
Postgres.
Hardened by a read-only adversarial-verify pass (12 agents) — 6 confirmed defects (all
fail-closed, none actual injection), all fixed + regression-tested:
- top/rare on a raw field emitted 2 %s but bound 1 param (dangling placeholder) -> resolve
the field once and GROUP BY output ordinal (like timechart); top ... by g percent is now
per-group (PARTITION BY) not the grand total.
- the recursive-descent parser had no depth cap -> deep parens/NOT raised RecursionError
(HTTP 500) -> added a nesting-depth guard (LoqlError) + a RecursionError safety net.
- list()/values() array_agg was unbounded (LIMIT counts rows, not cell size) -> [1:cap]
slice via LOQL_MAX_AGG_ELEMS.
- POST /query with a non-string 'query' raised AttributeError (500) -> a type guard returns
a clean 400.
Tests: test_loql.py 38 unit (parser/compiler snapshots + the injection invariant + the 4
verify regressions) + integration; test_integration_api.py /api/v1/query. Unit suite
284 -> 322. Docs: docs/LOQL.md reference + README section + CLAUDE + .env.
Co-Authored-By: Claude Fable 5.0 <noreply@anthropic.com>
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