Add the set-set spatial-join UDF family#192
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Expose eDwithinPairs, tDwithinPairs and aDisjointPairs as set-returning functions and minDistance(arr, arr) as a scalar reduction over tgeompoint[] and tgeometry[], wrapping the MEOS edwithin_tgeoarr_tgeoarr / tdwithin_tgeoarr_tgeoarr / adisjoint_tgeoarr_tgeoarr / mindistance_tgeoarr_tgeoarr kernel. The Pairs functions return the qualifying (i, j) index pairs into the input arrays; tDwithinPairs also returns the per-pair tstzspanset of when the within-distance relationship holds; minDistance returns the exact set-set spatial minimum distance.
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Expose eDwithinPairs, tDwithinPairs and aDisjointPairs as set-returning functions over tgeompoint[] and tgeometry[], wrapping the MEOS edwithin_tgeoarr_tgeoarr / tdwithin_tgeoarr_tgeoarr / adisjoint_tgeoarr_tgeoarr kernel. Each returns the qualifying (i, j) index pairs into the input arrays (1-based, matching DuckDB list indexing); tDwithinPairs also returns the per-pair tstzspanset of when the within-distance relationship holds. Stacks on the pinned-MEOS foundation that carries the kernel symbols.