Spade A 0114bd1dc9
feat: support match operator family (#46518)
issue: https://github.com/milvus-io/milvus/issues/46517
ref: https://github.com/milvus-io/milvus/issues/42148

This PR supports match operator family with struct array and brute force
search only.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
- Core invariant: match operators only target struct-array element-level
predicates and assume callers provide a correct row_start so element
indices form a contiguous range; IArrayOffsets implementations convert
row-level bitmaps/rows (starting at row_start) into element-level
bitmaps or a contiguous element-offset vector used by brute-force
evaluation.

- New capability added: end-to-end support for MATCH_* semantics
(match_any, match_all, match_least, match_most, match_exact) — parser
(grammar + proto), planner (ParseMatchExprs), expr model
(expr::MatchExpr), compilation (Expr→PhyMatchFilterExpr), execution
(PhyMatchFilterExpr::Eval uses element offsets/bitmaps), and unit tests
(MatchExprTest + parser tests). Implementation currently works for
struct-array inputs and uses brute-force element counting via
RowBitsetToElementOffsets/RowBitsetToElementBitset.

- Logic removed or simplified and why: removed the ad-hoc
DocBitsetToElementOffsets helper and consolidated offset/bitset
derivation into IArrayOffsets::RowBitsetToElementOffsets and a
row_start-aware RowBitsetToElementBitset, and removed EvalCtx overloads
that embedded ExprSet (now EvalCtx(exec_ctx, offset_input)). This
centralizes array-layout logic in ArrayOffsets and removes duplicated
offset conversion and EvalCtx variants that were redundant for
element-level evaluation.

- No data loss / no behavior regression: persistent formats are
unchanged (no proto storage or on-disk layout changed); callers were
updated to supply row_start and now route through the centralized
ArrayOffsets APIs which still use the authoritative
row_to_element_start_ mapping, preserving exact element index mappings.
Eval logic changes are limited to in-memory plumbing (how
offsets/bitmaps are produced and how EvalCtx is constructed); expression
evaluation still invokes exprs_->Eval where needed, so existing behavior
and stored data remain intact.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Signed-off-by: SpadeA <tangchenjie1210@gmail.com>
Signed-off-by: SpadeA-Tang <tangchenjie1210@gmail.com>
2025-12-29 11:03:26 +08:00

264 lines
47 KiB
Plaintext

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