jparmstrong/IsItQ

Is it Q? See which runtime's have the most complete Q implementation.

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Sep 10, 2026

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README

Is It Q?

Development and usage instructions

This scorecard compares how q, cqdb, peachq and l perform on the same Q test suite, covering language features and integration behavior. Is It Q? was created to make compatibility gaps visible, check real use cases across runtimes, and track improvements as new versions are released.

The results show which tested features work in each recorded runtime version. Coverage is the percentage of shipped test cases passed; it does not establish complete Q support.

Pass: all cases passed. Partial: some passed. Fail: none passed. Each result shows passed/total cases; click for details. Untested means no complete feature run. Runtime columns are ranked by overall pass rate, highest first; stale or incomplete runs appear last. Total coverage = passed cases / all shipped cases. Failed, missing and interrupted cases remain in the denominator. Stale: the recorded suite differs from this checkout; open the result for its original evidence.

Feature	q	cqdb	peachq	l
Total coverage	Pass 100.00% (16,174/16,174)	Partial 99.91% (16,159/16,174)	Partial 81.71% (13,215/16,174)	Partial 9.56% (1,546/16,174)
Types and nulls	Pass 95/95	Pass 95/95	Pass 95/95	Partial 93/95
Casts	Pass 91/91	Pass 91/91	Partial 89/91	Pass 91/91
Operators	Pass 83/83	Pass 83/83	Partial 82/83	Partial 82/83
Lists and indexing	Pass 145/145	Pass 145/145	Partial 127/145	Partial 144/145
Adverbs	Pass 45/45	Pass 45/45	Partial 40/45	Partial 43/45
Dictionaries	Pass 48/48	Pass 48/48	Partial 46/48	Fail 0/48; crash
Tables and basic queries	Pass 84/84	Pass 84/84	Partial 72/84	Partial 83/84
Joins	Pass 39/39	Pass 39/39	Partial 31/39	Partial 29/39
Dates and times	Pass 108/108	Pass 108/108	Partial 76/108	Partial 100/108
Strings	Pass 66/66	Pass 66/66	Partial 63/66	Partial 61/66
Formatting	Pass 41/41	Partial 39/41	Partial 39/41	Partial 40/41
Functions	Pass 62/62	Pass 62/62	Partial 61/62	Partial 61/62
Scope	Pass 42/42	Partial 41/42	Partial 39/42	Partial 40/42
Built-in functions	Pass 82/82	Pass 82/82	Partial 71/82	Partial 77/82
Error handling	Pass 32/32	Pass 32/32	Partial 31/32	Partial 31/32
Parsing and syntax	Pass 37/37	Pass 37/37	Partial 29/37	Partial 36/37
Binary serialization	Pass 73/73	Pass 73/73	Partial 60/73	Partial 59/73
JSON	Pass 47/47	Pass 47/47	Pass 47/47	Partial 44/47
Control flow	Pass 57/57	Pass 57/57	Partial 55/57	Partial 53/57
Advanced queries	Pass 43/43	Partial 40/43	Partial 30/43	Partial 40/43
Math	Pass 48/48	Pass 48/48	Partial 47/48	Partial 46/48
Linear algebra	Pass 93/93	Pass 93/93	Partial 91/93	Partial 88/93
Value display	Pass 34/34	Partial 27/34	Partial 33/34	Partial 33/34
Runtime	Pass 14/14	Pass 14/14	Partial 12/14	Partial 10/14
System commands	Pass 1/1	Pass 1/1	Pass 1/1	Pass 1/1
Text file I/O	Pass 9/9	Pass 9/9	Pass 9/9	Pass 9/9
Combinatorial keyword and type cases	Pass 14,470/14,470	Pass 14,470/14,470	Partial 11,791/14,470	Fail 0/14,470; crash
Flat storage	Pass 1/1	Pass 1/1	Pass 1/1	Pass 1/1
Splayed storage	Pass 1/1	Pass 1/1	Fail 0/1; error	Pass 1/1
Namespaces	Pass 1/1	Pass 1/1	Fail 0/1	Pass 1/1
Views	Pass 1/1	Pass 1/1	Fail 0/1; error	Pass 1/1
IPC loopback	Pass 1/1	Pass 1/1	Fail 0/1	Fail 0/1; timeout
K glyphs	Pass 68/68	Pass 68/68	Fail 0/68; incomplete	Pass 68/68
K adverbs	Pass 32/32	Pass 32/32	Fail 0/32; incomplete	Pass 32/32
Join edge cases	Pass 9/9	Pass 9/9	Partial 8/9	Partial 4/9
Larger-data correctness	Pass 8/8	Pass 8/8	Pass 8/8	Partial 7/8
Parallel execution	Pass 7/7	Pass 7/7	Partial 5/7	Partial 6/7
Malformed inputs and recovery	Pass 7/7	Pass 7/7	Pass 7/7	Pass 7/7
Restart and log replay	Pass 5/5	Pass 5/5	Fail 0/5; error	Pass 5/5
Partitioned storage	Pass 8/8	Pass 8/8	Fail 0/8; error	Pass 8/8
Server callbacks and timers	Pass 10/10	Partial 8/10	Fail 0/10; error	Fail 0/10; timeout
IPC typed payloads	Pass 14/14	Pass 14/14	Partial 12/14	Fail 0/14; timeout
IPC framing and malformed messages	Pass 7/7	Pass 7/7	Pass 7/7	Partial 6/7
Segmented storage	Pass 5/5	Pass 5/5	Fail 0/5	Pass 5/5

Latest runs and update checks

Runtime	Version	Platform	Tested (UTC)	Last check (UTC)	Update
q	5.0.20260723	linux-x86_64	2026-09-09T10:58:02+00:00	2026-09-09T10:58:00+00:00	updated
cqdb	0.26.4	linux-x86_64	2026-09-09T10:58:02+00:00	2026-09-09T10:58:00+00:00	updated
peachq	v0.81	linux-x86_64	2026-09-09T10:58:03+00:00	2026-09-09T10:58:00+00:00	updated
l	20260908	linux-x86_64	2026-09-09T11:02:17+00:00	2026-09-09T11:00:44+00:00	updated

Coverage inventory

Each assertion counts once; each whole-program snapshot counts once. Feature groups are not weighted scores.

Feature	Test files
Types and nulls	01_atoms_types.q
Casts	02_casts.q
Operators	03_operators.q
Lists and indexing	04_lists_indexing.q
Adverbs	05_adverbs.q
Dictionaries	06_dicts.q
Tables and basic queries	07_tables_qsql.q
Joins	08_joins.q
Dates and times	09_temporal.q
Strings	10_text.q
Formatting	20_format.q
Functions	11_functions.q
Scope	23_scope.q
Built-in functions	12_builtins.q
Error handling	13_errors.q
Parsing and syntax	14_parse_forms.q
Binary serialization	15_serialization.q
JSON	16_json.q
Control flow	17_control.q
Advanced queries	18_qsql_advanced.q
Math	19_math.q
Linear algebra	21_linalg.q
Value display	22_display.q
Runtime	24_runtime.q
System commands	system_cmds.q
Text file I/O	25_textio.q
Combinatorial keyword and type cases	90_enumerated.q
Flat storage	fileio_flat.q
Splayed storage	fileio_splayed.q
Namespaces	namespaces.q
Views	views.q
IPC loopback	ipc_client.q
K glyphs	k01_glyphs.k
K adverbs	k02_adverbs.k
Join edge cases	test_joins.q
Larger-data correctness	test_large_vectors.q
Parallel execution	test_parallel.q
Malformed inputs and recovery	test_robustness.q
Restart and log replay	test_restart.q
Partitioned storage	test_partitions.q
Server callbacks and timers	test_callbacks.q
IPC typed payloads	test_ipc_values.q
IPC framing and malformed messages	test_ipc_frames.json
Segmented storage	test_segments.q

Current suite SHA-256: a2b94a124fa74e72068d6230b0c8559eb620a93c2ad5e91d19db0888c3bde00a.

See automation for execution and publication settings.

Cross-runtime IPC matrix

Large-message IPC compression

Contributors

jparmstrong

1 commits

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Dataset

Languages

81.7%

Python

15.8%

HiveQL

2.1%