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Add new COLLECT parameter for FT.AGGREGATE - #4534
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Adds native client support for the new REDUCE COLLECT reducer introduced in Redis Search 8.7.225, which gathers per-document projections within a GROUPBY group. The reducer follows the grammar
nargcounts every token betweenCOLLECTand the optionalAS,FIELDSis mutually exclusive between*(expands to all fields in the current row) and an explicit count + list, and the optionalSORTBY/LIMITtuples produce a top-K projection per group.Note
Low Risk
Additive, experimental aggregation-builder support plus new tests; low blast radius, with main risk being incorrect argument serialization (
narg/FIELD/SORTBY/LIMIT ordering) causing query failures on supported Redis Search versions.Overview
Adds native client support for Redis Search’s experimental
FT.AGGREGATE ... REDUCE COLLECTvia a newCollectReducerbuilder (Reducers.collect()), supportingFIELDS(explicit list or*), optionalSORTBY, and optionalLIMIT, with validation to prevent invalid combinations and to enforce requiredFIELDSconfiguration.Introduces unit tests to lock down exact token/narg serialization, plus new standalone and cluster integration tests (RESP2/RESP3) that enable the server-side
search-enable-unstable-featuresflag and verify COLLECT behavior (top-K,FIELDS *, sparse fields, and deterministic tie-breaking), along with a smallSearchFeatureFlagstest utility for toggling/verifying that flag.Reviewed by Cursor Bugbot for commit 238391f. Bugbot is set up for automated code reviews on this repo. Configure here.