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planner: disable `tidb_prefer_broadcast_join_by_exchange_data_size` by default; set scale factor to optimize estimating broadcast join; #42915

Merged

ti-chi-bot merged 17 commits into pingcap:master from solotzg:broad-cast-join-ratio

Apr 12, 2023

Merged

planner: disable `tidb_prefer_broadcast_join_by_exchange_data_size` by default; set scale factor to optimize estimating broadcast join; #42915

Merge remote-tracking branch 'pingcap/master' into broad-cast-join-ratio

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