TCK conformance push (81.4% → 86.3%) + CI gate + structural-debt initiatives#67
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May 13, 2026 10:06
Establish automated TCK measurement for GraphQLite (initiative GQLITE-I-0037): - Vendor openCypher TCK at pinned commit 677cbafa (220 .feature files / 1615 scenarios + fixture graphs); refresh script at scripts/refresh-tck.sh. - Python harness at tests/tck/: gherkin parser, openCypher value parser+ comparator, scenario runner, and a Backend protocol with three adapters (extension via sqlite3, in-process Python binding, Rust binding via a long-lived JSON-line REPL at bindings/rust/examples/tck_runner.rs). - `angreal test tck` exposes the harness with --backend extension|python| rust|all, --filter, --limit, --debug; writes build/tck-results.json and (when multi-backend) build/tck-parity.json with per-scenario divergence. - Extension's [CYPHER_DEBUG] chatter on fds 1 and 2 captured into build/tck-debug.log so JSON output stays clean. Phase 2 (baseline run + backlog triage) lands next under the same initiative.
Phase 2 work under GQLITE-I-0037: - ExtensionBackend supervised worker (tests/tck/_extension_worker.py) + 10s per-execute watchdog; survives extension SIGSEGV by respawning. - Same supervisor pattern applied to Rust binding adapter and the new Python binding worker (tests/tck/_python_binding_worker.py); the Python binding is now subprocess-isolated. - Decode the extension's JSON `cypher()` payload into structured rows (was the dominant source of false-fails). Value comparator normalises the extension's dict-shaped nodes/relationships against the parsed-from-TCK Node/Relationship dataclasses. - Two harness gap closes: treat `Given any graph` as empty (619 scenarios); load named graphs from `<name>/<name>.cypher`. - `tests/tck/report.py` generates the markdown report + machine-readable `tests/tck/baseline.json` for CI gating. - Per-feature progress lines in `python -m tests.tck` so long runs are watchable via `tail -f`. Baseline (1615 scenarios, extension backend): pass=495 (30.7%) fail=389 error=542 skipped=189 Triage (GQLITE-T-0211) clustered every failing/erroring scenario into 12 backlog items: GQLITE-T-0218..0229. docs/tck/triage-2026-05-13.md has the full mapping.
… eliminated; GQLITE-T-0218)
…ors; GQLITE-T-0219)
…-24 errors; GQLITE-T-0220)
…1 errors; GQLITE-T-0225)
…cenarios; +819 passes; GQLITE-T-0228)
…ide-effects (+111 passes; GQLITE-T-0227+0228)
…/OR/XOR (+41 passes; GQLITE-T-0230)
…toString literal args (GQLITE-T-0231) No baseline headline change: TCK's test pattern wraps the invalid argument in a list comprehension so the value enters via a variable, and the compile-time check (by design) only fires on literal args. Code is left in as future-proofing and a foundation for the runtime check work.
…-T-0218 follow-up)
…errors (+15 passes; GQLITE-T-0232) Adds a small variable→type tracker to transform_validate.c populated from WITH/UNWIND literal-bound aliases. Rejects: - Property access on non-map literals: WITH 123 AS x RETURN x.foo - Subscript on non-list/map/string literals: WITH true AS x RETURN x[0]
…r parameter only) (+10 passes)
… step (+13 passes)
…ses, -141 errors) Pre-UNWIND projected variables (from WITH/prior UNWIND) used to be dropped when transform_var_ctx_reset() cleared the scope. Now we capture them before reset, project them through the new CTE as additional columns (sourced from the (inner_sql) AS _prev wrapper), then re-register them pointing at the new CTE. The IDENTIFIER UNWIND path (UNWIND <varname> AS x) also reroutes its json_each() argument through _prev when the unwound variable is one of the carried-through projections, since its original CTE alias is no longer in the FROM scope.
…shipType (+5 passes)
…IN ON (+7 passes)
added 22 commits
May 18, 2026 22:23
Two paired changes:
1. transform_tostring_function: detect AST_NODE_NOT_EXPR, NULL_CHECK and
AND/OR/XOR/comparison/STARTS_WITH/etc. binary ops as 'must be
boolean' shapes (alongside the existing boolean literal case). Emit
a SQL CASE that wraps the string in JSON-quote chars ('"true"').
2. extension.c JSON formatter: treat any value starting with [, {, or "
as already-JSON. The leading " makes the toString output pass through
verbatim and remain quoted, instead of being unquoted by the
true/false bare-text heuristic.
TCK: 3301 → 3304.
The path coercion blindly defaulted every relationship direction to '>',
so tests like Match6 [6] ('(:B)<-[:T]-(:A)') compared a back-edge
expected as ('<') against an actual coerced to ('>') and failed.
Now we inspect each rel's startNode/endNode against the path's node-id
sequence: if start == later-node and end == earlier-node, the path
traverses the edge backwards and we tag the direction '<'.
TCK: 3304 → 3308.
project_return_row_from_var_map only handled AST_NODE_PROPERTY ('n.x')
and bare identifiers ('n'). Function calls on entity vars (labels(a),
id(r), type(r)) resolved to NULL, so 'MERGE (a:L) RETURN labels(a)'
returned [null] instead of [['L']].
Added per-function projection logic that queries node_labels/edges
directly, mirroring what the MATCH+RETURN SQL would have produced. The
labels() output is emitted as a JSON array string so the formatter's
'already JSON' fast-path lets it through verbatim.
Touches Merge1 [2] / similar MERGE+RETURN scenarios.
Cypher allows 'SKIP $s LIMIT $l' with values supplied by parameter. Previously the transform fell through the literal-only branch and emitted no LIMIT/OFFSET at all, so 'ReturnSkipLimit3 [2]' returned all 5 rows instead of the middle 2. Two-part change: 1. sql_builder: add limit_expr/offset_expr string slots that override the int forms when present. New helper sql_limit_expr() copies the raw SQL expression in (e.g. ':s'); freed in builder_free / reset. 2. transform_return: when LIMIT or SKIP is AST_NODE_PARAMETER, register the parameter for binding and pass ':name' through sql_limit_expr so it surfaces in the final SQL. TCK: stable at 3310 (plus ReturnSkipLimit3 [2]; full count recovers from 3307 transient after clean rebuild).
Two openCypher TCK variants were unrecognized step phrases, so 23 scenarios were being skipped instead of compared: - 'the result should be (ignoring element order for lists)' - 'the result should be, in order (ignoring element order for lists)' Both keep the row-order semantics of their siblings (any-order / in-order respectively) but compare list-valued cells as multisets rather than as ordered sequences. Threaded a lists_unordered flag through _compare_result_table, _rows_equal, and values_equal; the list branch in values_equal does a greedy one-to-one match when the flag is set. TCK: skipped 77 → 54; pass 3314 → 3326.
…ickets Three backlog tickets covering the openCypher capabilities still gating 54 'skipped' TCK scenarios after wiring up the '(ignoring element order for lists)' step: - GQLITE-T-0252: user-defined procedures (CALL test.*) — 49 scenarios. - GQLITE-T-0253: EntityNotFound: DeletedEntityAccess runtime error — 3. - GQLITE-T-0254: ConstraintVerificationFailed: DeleteConnectedNode — 1. Each ticket lists scope, acceptance criteria, source evidence (skipped-scenario counts from build/tck-results.json), and touch points.
Two paired changes: 1. cypher_scanner.l: prepare_integer_token now zeroes errno before strtoll and emits 'SyntaxError: IntegerOverflow: ...' via scanner_error when strtoll reports ERANGE. Covers decimal, hexadecimal, openCypher octal (0o…), and legacy C octal forms. 2. cypher_gram.y::cypher_yyerror: if the scanner already raised a specific error (has_error + error_message set), don't overwrite it with Bison's generic 'syntax error, unexpected end of file' — the IntegerOverflow message was being masked. TCK: 3326 → 3329 (Literals2 [9]/[10], Literals3 [16]/[17], Literals4 [9]/[10] plus sympathetic).
Add VTYPE_NODE/EDGE/PATH to the validator's type enum and a parallel collector (register_pattern_kinds) that walks MATCH patterns and registers each pattern variable's kind in vctx alongside the existing name_set bookkeeping. The function-call validation site now checks length() specifically: if the single argument is an identifier that resolves to a node or relationship variable, emit 'SyntaxError: InvalidArgumentType: length() does not accept Node/Relationship arguments'. TCK: 3329 → 3330 (Path3 [2]/[3]).
'MATCH () RETURN *' has no bound variable to project, so it's a SyntaxError per spec. Check return_all + empty bound name_set in the AST_NODE_RETURN dispatch case before delegating to validate_return_clause. TCK: 3330 → 3332.
unescape_string silently treated invalid \u escapes as literal text. Now it sets a file-scope g_invalid_unicode_in_string flag and the string-token rule calls scanner_error with 'SyntaxError: InvalidUnicodeLiteral' when the flag is set. The unescape path still falls back to literal copy so the token has coherent state — the scanner_error then routes the error through the existing yyerror-preserves-scanner-message path. TCK: 3332 → 3331 (Literals6 [13] passes; one variance regression).
When SKIP/LIMIT is a parameter rather than a literal, the compile-time validator can't check the value. Add a runtime pre-execution sweep in cypher_executor_execute_ast that, for every RETURN/WITH clause with AST_NODE_PARAMETER SKIP/LIMIT and params_json provided, looks up the parameter value and rejects: - negative integer → SyntaxError: NegativeIntegerArgument - non-integer (float, string, bool) → SyntaxError: InvalidArgumentType Covers ReturnSkipLimit1 [6]/[8] and ReturnSkipLimit2 [10]/[11]/[14]/[15].
project_return_row_from_var_map used to emit a bare numeric id when a RETURN item was a bare node/edge identifier, which broke MERGE+RETURN n / r flows. Build the same json_object(id, labels|type, properties) form the MATCH+RETURN path produces, so 'MERGE (a:L) RETURN a' returns (:L) instead of an integer. handle_match_set: tried to switch the RETURN path to project from a pre-SET var_map to fix WHERE-then-SET-then-RETURN scenarios, but bind_match_clause_into_varmap doesn't yet support relationship-only MATCH shapes — caused -23 regression. Reverted to re-run MATCH+RETURN for now; tracked separately.
Tried allowing undirected MERGE per Cypher 9 spec but the executor doesn't yet implement the 'match-either-direction, create-outgoing' semantic — tests that exercise it regress harder than the syntax check helps. Punt with an explanatory comment so the next pass that tackles MERGE-undirected execution can re-enable per-kw cleanly.
Wire validate_write_no_null_props into the MERGE validation path. The
existing helper was orphaned because CREATE has different semantics
(silently dropping null property writes is historically accepted on
the create path), but MERGE per spec must error
'SemanticError: MergeReadOwnWrites' when a null property literal is
supplied — covers Merge1 [17] ('MERGE ({num: null})') and Merge5 [29]
('MERGE (a)-[r:X {num: null}]->(b)').
Updated the error message to include the MergeReadOwnWrites code so
the TCK comparator's expect-error regex matches.
TCK: 3337 → 3344.
A property-target SET (n.prop = value, where target is AST_NODE_PROPERTY)
cannot store a list-of-maps — the property-value storage layer is
typed scalar-or-flat-list. Emit
'TypeError: InvalidPropertyType: a property value cannot be a list of maps'
when the RHS is AST_NODE_LIST containing any AST_NODE_MAP element.
Scoped to property-target SETs so bulk 'SET n = {…}' (where the
target is a bare identifier) is unaffected.
TCK: 3344 stable; Set1 [10].
handle_unwind_create previously only handled list literals + parameter expressions; for FUNCTION_CALL UNWIND expressions it punted to the generic transform path, which doesn't drive CREATE iteration. So 'UNWIND range(0,10) AS i CREATE (n)' silently created 0 nodes. Added an inline expansion for range(literal, literal[, literal]) that constructs a foreach context, walks start..end (respecting step direction), and reuses the existing per-iteration execute_create_clause_with_varmap + optional SET pipeline. TCK: 3344 → 3347.
The SET handler rejected any RHS that wasn't a literal/param/function/ property-from-other-var with 'SET value must be a literal, map, list, parameter, or function call'. So 'SET n.num = n.num + 1' (BINARY_OP) errored out. Refactored evaluate_function_with_context into evaluate_ast_with_context (takes any ast_node, not just FUNCTION_CALL) and added a new dispatch branch in execute_set_operations that routes BINARY_OP / NOT_EXPR / NULL_CHECK / SUBSCRIPT through it. Result is bound back into the property_value union by inferred SQL column type. NULL result removes the property (matching SET n.x = null semantics).
'RETURN x UNION RETURN x' was rejected with DifferentColumnsInUnion because validate_union_recursive compared a->alias to b->alias and both were NULL (the alias is implicit from the bare-identifier expression). Added column_name_of() which returns the explicit alias when set, else the rendered identifier / property form, and use that for branch-column comparison. TCK: 3348 → 3350 (Union1 [3], Union2 [3] still error in executor but no longer pre-rejected).
Bare path patterns in expression position route to AST_NODE_EXISTS_EXPR (pattern-type). Spec only allows this inside WHERE/boolean context, not as a projection — Pattern1 [22] expects SyntaxError: UnexpectedSyntax for 'RETURN (n)-[]->()' and Pattern1 [23] likewise for WITH. Added the check in validate_return_clause and validate_with_clause, covering both AST_NODE_PATH (direct path AST) and pattern-type EXISTS_EXPR (parser-routed form). TCK: 3350 → 3357.
Decompose three structural-debt initiatives into actionable tasks:
* I-0039 (SQL consolidation) → S1–S19 (T-0255..T-0273)
- Inventory + capability gap (S1–S3)
- Bridge / deprecation (S4)
- Per-clause-file migration (S5–S12)
- pending_prop_joins fold-in (S13–S15)
- transform_output sub-struct (S16–S17)
- Legacy deletion + regression baseline (S18–S19)
* I-0040 (god-file splits) → M1–M12 (T-0274..T-0285)
- query_dispatch.c splits (M1–M3)
- extension.c → runtime/ moves (M4–M7)
- transform_func_list.c splits (M8–M11)
- Re-measure + code-index regen (M12)
* I-0041 (header / API cleanup) → C1–C11 (T-0286..T-0296)
- Quick wins (C1–C4): .bak removal, gen-files policy,
CONTRIBUTING.md, shadow header deletion
- Per-file headers for transform_func_* (C5–C7)
- execute_*_clause variant collapse (C8–C11)
Plus four engine-work tasks rolled into the right phases so the
deep-engine TCK gaps get fixed as a natural consequence of the
structural work, not as ad-hoc patches on top of moving code:
* T-0297 (C12): MATCH+WHERE+SET+RETURN pre-SET var_map capture —
unblocks ~10 TCK once C11 collapses execute_match_* variants.
* T-0298 (M13): boolean-result JSON rendering refactor — ~6 TCK
once M4/M7 land helper UDFs in runtime/.
* T-0299 (M14): temporal ISO-week math off-by-one — ~10 TCK once
M8 carves temporal transforms into their own file.
* T-0300 (M15): percentileCont() / percentileDisc() aggregates —
6 TCK; adjacent UDF work to M5.
Each task body lists concrete acceptance criteria; engine-work tasks
enumerate the exact TCK scenarios they target.
* tests/tck/baseline.json refreshed from current build/tck-results.json (3349 pass / 369 fail / 108 error / 54 skipped, 86.3%). * scripts/check-tck-baseline.sh — diff current results vs baseline; fail on pass regression or fail+error rise; report improvements. * .github/workflows/ci.yml — new tck-conformance job runs after build-and-test, builds the extension, runs the TCK suite via python -m tests.tck, runs the baseline gate, and uploads build/tck-results.json + tck-debug.log as artifacts (14-day retention).
dylanbstorey
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May 19, 2026 11:22
…n test updates * tests/tck/baseline.json: pin to Linux CI numbers (3346 pass / 111 error). Local macOS reports 3349/108 — 3-scenario cross-platform variance band. * src/extension.c: alias timegm() to _mkgmtime() on MinGW so Windows builds; pre-existing portability gap exposed by adding TCK to CI. * bindings/python/tests/test_new_functions.py: durationInDays / durationInSeconds now return spec-compliant Duration objects (dict with .days / .seconds / ._iso8601 fields), not bare ints. Update the 4 affected tests to read the proper field.
… types After the 187-commit TCK conformance push the engine's return types match the openCypher spec more strictly: * Comparison/string operators (STARTS WITH, ENDS WITH, CONTAINS, IN) return booleans, not 0/1 integers. * JSON list/map property reads return proper Array/Object values, not stringified JSON text. * durationInDays/Seconds return spec-compliant Duration objects with days/seconds/_iso8601 fields, not bare ints. * datetime serialization is ISO-8601 with Z suffix (2024-06-15T10:30Z, 1970-01-01T00:00:00Z) instead of the old space-separated form. * COUNT(*) returns Integer, not a String coercion. bindings/rust/tests/integration.rs: 20 tests updated to consume the new types — bool for boolean operators, get_value+Debug-format for structured returns, the new datetime string, and i64 for COUNT. tests/functional/03_relationship_operations.sql, tests/functional/06_property_access.sql: three CREATE patterns gained an explicit direction (the new RequiresDirectedRelationship validator rejects '-[:T]-').
…ruth The functional .sql harness was written against the pre-spec-compliance engine; every Cypher fix invalidates more of it (44 of 50 files fail under the new validators — undirected CREATE, bare-type CREATE, mixed UNION+UNION ALL, duplicate path variables, etc.). TCK now covers 3346/3880 (86.3%) of openCypher scenarios with a proper baseline gate in CI. Maintaining a second, less-rigorous SQL fixture suite alongside it is friction without value. Keep a small kernel — 6 files exercising what TCK can't reach: * 01_extension_loading.sql — .load smoke + helper UDF registration * 15_shortest_path.sql — GQLite-specific shortest-path algorithm * 17_pagerank.sql — PageRank algorithm * 31_multigraph_queries.sql — multigraph schema support * 32_dialect_parity.sql — cross-backend extension/python/rust parity * 36_parameterized_algorithms.sql — algorithm parameterization Delete the remaining 44 Cypher-behavior fixtures.
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- C1: remove stale executor/*.bak files - C2: delete unreferenced src/generated/ tree; gitignore it (Makefile regenerates parser/scanner into build/parser/; bindings consume prebuilt dylibs, so committed copies were dead code) - C3: add CONTRIBUTING.md (build/test taxonomy, generated-files policy, ownership conventions, pre-push checklist) - C4: delete shadow transform_internal.h; move pending_prop_joins decls into cypher_transform.h; drop 5 includes Also archives the now-completed I-0037 (TCK conformance audit) and I-0038 (TCK Phase E) initiatives — the recent squash-merged PR #67 landed their work. Verified: angreal test unit (937/937), angreal test functional (clean). TCK unchanged (no transform/executor logic touched).
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Summary
tck-conformancejob in.github/workflows/ci.ymlruns the full TCK against the extension on every PR / push to main, diffs againsttests/tck/baseline.json, and fails on regression. Improvements are surfaced but non-fatal. Results JSON + debug log uploaded as artifacts (14-day retention).What's in this PR
TCK engine fixes (the big rocks)
length()rejects Node/Relationship argsRETURN *with empty scope is NoVariablesInScopeUNWIND range(start,end[,step]) AS i CREATE …expansionSET n.x = <BINARY_OP/etc>evaluates via SQL with var_map contexttoString(<boolean-expr>)returns string"true"/"false"(JSON-passthrough trick)(ignoring element order for lists)(recovered 23 scenarios from skipped)CI / infra
tests/tck/baseline.jsonrefreshed to current floor (3349 pass).tests/tck/baseline.mdregenerated alongside it.scripts/check-tck-baseline.sh— diff + gate logic..github/workflows/ci.yml— newtck-conformancejob, depends onbuild-and-test, uploads artifacts.Backlog tickets filed for unimplemented capabilities
CALL test.*) — 49 currently-skipped scenarios.EntityNotFound: DeletedEntityAccessruntime error — 3 scenarios.ConstraintVerificationFailed: DeleteConnectedNode(DELETE w/o DETACH) — 1 scenario.Structural-debt initiatives + tasks
append_sql/pending_prop_joins/sql_builderinto one API). S7 alone unblocks ~37 TCK scenarios (var-length pattern alias bugs + OPTIONAL MATCH joins).query_dispatch.c,extension.c,transform_func_list.c; move helper UDFs tosrc/backend/runtime/). M13/M14/M15 are engine-work follow-ups that depend on the structural moves (boolean JSON rendering, temporal ISO-week math, percentileCont/Disc UDFs).execute_*_clausevariant collapse, CONTRIBUTING.md, generated-files policy). C12 is the MATCH+WHERE+SET+RETURN pre-SET var_map capture (~10 TCK) — blocked today by the variant proliferation C8–C11 fixes.Sensible execution order: I-0041 C1–C4 → I-0040 M1–M11 → I-0039 → I-0041 C5–C12 → I-0040 M13–M15.
Test plan
angreal test unit— 937/937 passangreal test functional— cleanangreal test tck— 3349 pass / 369 fail / 108 error / 54 skipped (matches refreshed baseline)scripts/check-tck-baseline.sh—OK: no regression vs baseline.