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*: support Local MATCH AGAINST boolean expr | pd=release-8.5 tikv=release-8.5 tidb=release-8.5 ticdc=release-8.5 - #11111
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Merge Risk: 🔵 Low · up to
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| Check name | Status | Explanation | Resolution |
|---|---|---|---|
| Docstring Coverage |  |
Docstring coverage is 6.02% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 83 functions across 9 files. (4 skipped: 4… | Write docstrings for the functions missing them to satisfy the coverage threshold. |
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Check name Status Explanation Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request. Title check The title clearly identifies the primary Local MATCH AGAINST Boolean expression support and the related release-8.5 component image pinning. Description check The description is complete and directly addresses the problem, implementation, dependencies, testing, performance, remaining acceptance work, and release note. It does not reproduce the template's ch… Full details: Description check
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Explanation
The description is complete and directly addresses the problem, implementation, dependencies, testing, performance, remaining acceptance work, and release note. It does not reproduce the template's checkbox sections exactly, and it uses "ref
#10233" instead of the requested "Issue Number: close#xxx" format, but the required information is covered in detail.
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Full details: Docstring Coverage
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Explanation
Docstring coverage is 6.02% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 83 functions across 9 files. (4 skipped: 4 unsupported.)
Resolution
Write docstrings for the functions missing them to satisfy the coverage threshold.
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A rabbit reads the query strings,
Then hops through tokens, stops, and things.
STANDARD and NGRAM share the trail,
While phrases find their guarded rail.
Collations guide each match along,
The test burrow checks each song.
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solotzg
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Add ASCII decoding fast paths and collation-key builtin stopword lookup. Fuse STANDARD filtering with scanning, collect NGRAM boundaries once, and borrow collated document tokens without changing query ownership or positional semantics. Verified with 25 related gtests, real TiUP E2E on macOS and h124, token sizes 2/3, and paired single-thread server benchmarks.
Normalize analyzer configuration for query compilation and share term collection and result finalization. Preserve scalar row-path arguments and tokenizer/matcher behavior. Add analyzer defaults and NULL-result regressions.
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Review comments at @tests/docker/cluster.yaml:
- Line 19: Update the PD, TiKV, and TiDB image references in the three compose
configurations to use their respective PD_BRANCH, TIKV_BRANCH, and TIDB_BRANCH
environment overrides, defaulting each to release-8.5. Preserve the existing
image repositories and apply the same behavior across all three configurations.
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tests/docker/cluster.yamltests/docker/cluster_disable_new_collation.yamltests/docker/cluster_new_collation.yamltests/docker/cluster_tidb_fail_point.yaml
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solotzg
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…al MATCH services Signed-off-by: Zhigao Tong <tongzhigao@pingcap.com>
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| @@ -328,7 +328,7 @@ String DAGExpressionAnalyzerHelper::buildSingleParamJsonRelatedFunctions( | |||
| function_json_unquote) | |||
| { | |||
| bool valid_check | |||
| = !(isScalarFunctionExpr(input_expr) && input_expr.sig() == tipb::ScalarFuncSig::CastJsonAsString); | |||
| = !isScalarFunctionExpr(input_expr) || input_expr.sig() != tipb::ScalarFuncSig::CastJsonAsString; | |||
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same meaning, unnecessary?
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Yes, the expressions are logically equivalent. This rewrite was made in commit cd0b66d to address a readability-simplify-boolean-expr diagnostic from clang-tidy during CI. The repository treats clang-tidy warnings as errors. It does not change JSON behavior; we retained it to satisfy the lint check.
| // library and strictly tests that Unicode version and the Unicode 15.0.0 checksum. | ||
| // Regenerate/check this header using the paired TiDB generator. Never change | ||
| // an existing protocol version's classification; deploy TiFlash support for a | ||
| // new version before TiDB emits it. ASCII and '_' use the fast path below. |
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// align with golang's unicode 15.0.0 judgement as:
// word := r <= unicode.MaxRune &&
// (unicode.IsLetter(r) || unicode.IsNumber(r) || r == '_')
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Added this equivalent Go predicate in solotzg@71904a207d, and synchronized the generator template in solotzg/tidb@6bf2b1a00d so regeneration preserves the explanation. The comment also distinguishes the helper's full Unicode classification from the Boolean lexer's separate BMP restriction (r <= 0xFFFF). This is documentation-only; the table and runtime classification are unchanged.
| @@ -16,7 +16,7 @@ version: '2.3' | |||
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| services: | |||
| pd0: | |||
| image: hub.pingcap.net/qa/pd:${PD_BRANCH:-master} | |||
| image: ${PD_IMAGE:?PD_IMAGE must be set} | |||
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Yes, this change is intentional and necessary. The EE team does not guarantee that the Docker registry/image repository addresses remain stable, and the previously hard-coded repositories are no longer recommended. Requiring explicit PD_IMAGE, TIKV_IMAGE, and TIDB_IMAGE lets the invoking environment supply the maintained image locations and the appropriate component builds, without encoding obsolete registry assumptions or silently falling back to master images in these compose files.
| clause.modifier = BooleanClause::Modifier::Should; | ||
| break; | ||
| default: | ||
| compiled.matches_nothing = true; |
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Could we reject invalid node enums here instead of treating them as a query that matches nothing? The PR description says that invalid metadata is rejected, but an unset occur (defaulting to Invalid) reaches this branch and silently produces non-NULL zeros. The term_type default branch has the same behavior.
This is based on code inspection; I have not run a malformed-payload test, and I do not see evidence that the current TiDB serializer emits these values. Still, returning a normal no-match result can hide protocol construction errors. Please validate both node enums and throw ILLEGAL_COLUMN, with regression tests for missing/invalid occur and term_type.
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Fixed in solotzg@71904a207d. The metadata decoder now validates every node's occur and term_type before NULL-search and analyzer no-match early returns. Missing, explicitly Invalid, or unknown enum values are rejected with ILLEGAL_COLUMN; the compiler's default branches also throw instead of treating malformed metadata as a normal no-match query.
Added regression coverage for both fields with missing/Invalid/unknown wire values, including a malformed node after a valid one, NULL searches, and analyzer no-match settings (24 combinations). I have not run these tests locally; validation is left to PR CI.
| // start advances beyond it, it expires without a queue or cache. | ||
| size_t stopword_end = 0; | ||
| size_t filtered_until_start = 0; | ||
| for (size_t start = 0; start + ngram_token_size <= char_count; ++start) |
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Nice optimization! TiDB could adopt the same sliding-window approach to avoid repeated stopword checks across overlapping ngrams.
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: AilinKid, windtalker, xzhangxian1008 The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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pingcap:feature/release-8.5-fts
What problem does this PR solve?
Add row-wise Boolean Local MATCH to TiFlash scalar execution so eligible filters can run without relying on TiCI or inverted-index consistency. Related: pingcap/tidb#71397, pingcap/tidb#71839.
ref #10233
What is changed and how it works?
LocalMatchAgainstBoolean = 5250: decode the Boolean AST/analyzer payload fromExpr.valand evaluate document columns per row in TiFlash Selection. Semantic protocol version 2 is shared with TiDB; unsupported versions and malformed metadata, including missing or invalid node occurrence/term-type enums, are rejected withILLEGAL_COLUMNbefore NULL-search or analyzer no-match shortcuts. This is a scalar path, not scan-level FTS/TiCI index access.buildLocalMatchAgainstBooleanDAG expression builder to adaptExpr.valinto the runtime function's final constant argument. Preserve expression collation and include metadata in action identity so different analyzer/query configurations cannot alias the same expression action.Dependencies
Paired with TiDB PR pingcap/tidb#71839. The scalar-ID reservation pingcap/tipb#431 and feature protocol pingcap/tipb#432 are merged. Both products use the official PingCAP Tipb revision
4044aac591d778250cad3488dfd6e6f574411f1a: TiDB through module versionv0.0.0-20261014084553-4044aac591d7and TiFlash throughcontrib/tipb. The forked Tipb dependency is no longer required. Compatible TiFlash support must be deployed before enabling TiDB pushdown that emits this protocol.Correctness verification (2026-10-12)
The correctness and performance results below are historical evidence from the 2026-10-12 validation runs, not a fresh rerun of the current PR heads. The latest follow-up changes have not been rerun locally; their validation is left to CI for the corresponding PR heads. Historical E2E/performance results do not establish current-head or formal release acceptance.
AVAILABLE=1, compare complete matched results and require MATCH inmpp[tiflash]Selection without a root MATCH residual. Fallback tests compare complete row IDs and assert TiDB root evaluation. No TiCI path is used.Performance verification
On the shared h124 server, a development benchmark used 20,000 × 4 KiB repeated synthetic documents, STANDARD/NGRAM, stopwords OFF/ON, five query shapes, default MPP settings and native SQL threads=1. Single-connection TiFlash MPP end-to-end P50 was 2.96–6.95× faster than TiDB fallback across the selected cases; complete matched IDs and actual plan placement were checked. This compares different scan engines and execution paths, not isolated Go/C++ matcher speed.
Separate paired regression checks observed persistent small increases for NGRAM size=2 with stopwords ON: about 0.8–1.0% for TiDB word/prefix/phrase in an independent follow-up and 1.3–2.2% for TiFlash prefix/CJK in the main measurements. Root cause is not established; do not claim zero performance regression or use other cases' improvements to cancel these observations.
These are development measurements, not an SLA or release acceptance. The host is shared, CPU frequency is not pinned, the corpus is repetitive and highly compressible, and h124 TiFlash is RELWITHDEBINFO (
-O2 -g -DNDEBUG), not an official release package. Tests use official v8.5.8 PD/TiKV with locally built modified products, identified by runtime versions and binary fingerprints; TiDB identity is checked withtidb_version(). Raw logs, measurements, complete-result/plan records and detailed reports are retained outside the product repositories and are not public CI artifacts.Remaining acceptance work
Opt-in memory pressure was skipped; ASAN/UBSAN and full token/position differential coverage remain pending. Ready for code review does not mean formal release acceptance.
Release note
Summary by CodeRabbit
MATCH AGAINSTsearch with standard and n-gram tokenization, phrase and prefix matching, and required, optional, and excluded terms.