Summary

Brings the parser up to grammar parity with QuestDB OSS ≥ 9.4.0 and Enterprise ≥ 3.3.0, plus the two still-open feature PRs (LIVE VIEWS, mat-view row expiry). Every construct parses to a typed AST, round-trips through toSql(), and autocompletes. Also fills prior-minor gaps (9.3.0→9.4.0, 3.2.0→3.3.0) surfaced by a full audit, and improves autocomplete/highlighting for keywords the grammar reaches via the non-reserved identifier path.

Guiding rule: never reject syntax QuestDB accepts (extra leniency is fine).

What's been added

LIVE VIEWS — create/drop/alter, SHOW CREATE, and the ANCHOR window clause; live_views() function.

• CREATE LIVE VIEW lv FLUSH EVERY 5s IN MEMORY 1h START FROM BEGINNING AS (SELECT * FROM t)
• CREATE LIVE VIEW lv FLUSH EVERY 1s START FROM NOW AS SELECT ... FROM base
• ALTER LIVE VIEW lv RESUME WAL FROM TXN 1, DROP LIVE VIEW IF EXISTS lv, SHOW CREATE LIVE VIEW lv
• SELECT avg(x) OVER (ORDER BY ts ANCHOR EXPRESSION timestamp_floor('1d', ts)) FROM t
• ... WINDOW w AS (ORDER BY ts ANCHOR DAILY '09:30')

Materialized-view EXPIRE ROWS row retention (WHEN / KEEP LATEST / KEEP [n] HIGHEST|LOWEST [CLEANUP EVERY]), plus ALTER … SET/DROP EXPIRE.

• CREATE MATERIALIZED VIEW mv AS (SELECT * FROM base) EXPIRE ROWS WHEN v < 2.0 CLEANUP EVERY 30m
• ... EXPIRE ROWS KEEP LATEST PARTITION BY sym
• ALTER MATERIALIZED VIEW price_1h SET EXPIRE ROWS KEEP HIGHEST px PARTITION BY sym CLEANUP EVERY 1h
• ALTER MATERIALIZED VIEW price_1h DROP EXPIRE ROWS

SAMPLE BY bare single-letter units ({n,U,T,s,m,h,d,w,M,y}, no leading digit).

• SELECT ts, avg(x) FROM t SAMPLE BY w

REFRESH MATERIALIZED VIEW … STATS.

• REFRESH MATERIALIZED VIEW mv STATS

REBASE WAL [INTO '<dir>'] on ALTER TABLE and ALTER MATERIALIZED VIEW.

• ALTER TABLE t REBASE WAL INTO 'd1'
• ALTER MATERIALIZED VIEW mv REBASE WAL

SHOW CREATE DATABASE [ (INCLUDE|EXCLUDE) (ALL | (cat, …)) ].

• SHOW CREATE DATABASE INCLUDE (tables, views, users)
• SHOW CREATE DATABASE EXCLUDE (materialized_views, service_accounts, acl)

Table FORMAT { PARQUET | NATIVE } on CREATE TABLE (3 positions) and ALTER TABLE … SET FORMAT.

• CREATE TABLE t (a INT) TIMESTAMP(a) PARTITION BY DAY FORMAT PARQUET WAL
• ALTER TABLE t SET FORMAT NATIVE

Enterprise SWITCH ROLE TO { PRIMARY | REPLICA } [TIMEOUT <ms>] / SWITCH STATUS.

• SWITCH ROLE TO REPLICA TIMEOUT 5000
• SWITCH STATUS

Column-level GRANT/REVOKE wildcards, 3-word permissions, and CONVERT PARTITION permission.

• GRANT SELECT ON tab(* EXCLUDE(a, b)) TO alice
• GRANT SET TABLE FORMAT ON t TO alice (also SET STORAGE POLICY / SET TABLE TYPE / REMOVE STORAGE POLICY)
• GRANT CONVERT PARTITION TO PARQUET ON tab TO alice

Posting/bitmap indexes — INDEX TYPE POSTING [DELTA|EF] [CAPACITY n] [INCLUDE(cols)] / TYPE BITMAP|NONE, column- and table-level, plus ALTER COLUMN … ADD INDEX.

• CREATE TABLE t (s SYMBOL INDEX TYPE POSTING DELTA INCLUDE (a, b), a INT, ts TIMESTAMP) TIMESTAMP(ts)
• CREATE TABLE x (t TIMESTAMP, s SYMBOL), INDEX(s TYPE POSTING) TIMESTAMP(t)
• ALTER TABLE t ALTER COLUMN sym ADD INDEX TYPE POSTING INCLUDE (p)

Dynamic WINDOW JOIN bound — a column/cast/function expression as the RANGE BETWEEN … PRECEDING/FOLLOWING bound.

• SELECT * FROM t WINDOW JOIN p ON t.sym = p.sym RANGE BETWEEN wndBound SECONDS PRECEDING AND wndBound SECONDS FOLLOWING
• ... WINDOW JOIN prices p RANGE BETWEEN t.price::long minutes PRECEDING AND 1 minute FOLLOWING INCLUDE PREVAILING

Multi-RHS HORIZON JOIN chaining before a trailing RANGE/LIST … AS x.

• SELECT ... FROM trades t HORIZON JOIN bids AS b ON (t.sym = b.sym) HORIZON JOIN asks AS a ON (t.sym = a.sym) LIST (-1s, 0s, 1s) AS h

Enterprise COPY PERMISSIONS FROM <src> TO <dst> and CONVERT PARTITION grant/revoke names.

• COPY PERMISSIONS FROM src TO dst

New function names (autocomplete): sleep, regr_r2, is_end_of_month, kurtosis*, skewness*, array_agg, live_views, cume_dist, ntile, nth_value, backups.

Autocomplete & highlighting

• New contextKeywordSuggestions re-surfaces keywords the grammar accepts only through the non-reserved identifier sub-rule (so Chevrotain reports them as the abstract IdentifierKeyword and they never appeared as hints): GRANT/REVOKE CONVERT PARTITION, SET TABLE FORMAT/TYPE, SET/REMOVE STORAGE POLICY, CONVERT PARTITION TO PARQUET|NATIVE, and SHOW CREATE DATABASE category names. Parsing already accepted these — this only affects the hints.
• Registered now as a constant and the SHOW CREATE DATABASE category names (schema, views, acl, materialized_views, service_accounts) as non-reserved constants, so they classify/highlight consistently while staying usable as identifiers (START FROM NOW now highlights as a constant; now() stays a function).

Testing

• New parse+AST and round-trip blocks in tests/parser.test.ts, autocomplete regression tests in tests/autocomplete.test.ts, and representative fixtures in tests/fixtures/docs-queries.json.
• SQL for each feature was harvested from the corresponding QuestDB/Enterprise test suite and verified to parse here.
• 6992 tests pass; typecheck, lint, and build are clean.

Note: no version bump / CHANGELOG release entry in this PR (functional changes only).