perf(optimizer): Make cost-based strategy of using parent preference in AddLocalExchanges#26960

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feilong-liu merged 1 commit intoprestodb:masterfrom

kagamiori:adjust_parent_preference_in_addlocalexchanges

Jan 30, 2026

Commits on Jan 30, 2026

We observed that the use of parent preference in AddLocalExchanges can limit parallelism when the cardinality of the partition column of parent preference is low. In a setup where a query is allowe…
kagamiori
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