Revert "planner: fix the wrong cost formula of MPPExchanger" #35707
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This reverts commit d3b79de.
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* upstream/master: (38 commits) planner: disable collate clause support for enum or set column (pingcap#35684) *: Provide a util to "pause" session in uint test (pingcap#35529) ddl: implement the core for multi-schema change (pingcap#35429) parser: XXXDatabaseStmt now use CIStr for DB name (pingcap#35668) *: remove real tikv test on github actions (pingcap#35710) lightning: support disable scheduler by key range (pingcap#34130) Revert "planner: fix the wrong cost formula of MPPExchanger" (pingcap#35707) ddl, owner: refresh ddl sequence cache after becoming the owner (pingcap#35516) store/copr: fix tiflash integration test by disable paging on tiflash (pingcap#35674) planner: new cost formula for IndexJoin (pingcap#35671) BR: fix backup ranges total time summary log (pingcap#35552) raw_restore: fix the issue that raw restore rewrite the t prefix keys (pingcap#35641) table: fix cannot find the temp table when it's created in a transaction (pingcap#35663) metrics: replace histogram with counter for DistSQLCoprCache (pingcap#35514) *: enable exportloopref (pingcap#35680) types: fix bad error message for numeric conversion issue#32744 (pingcap#34047) *: enable ineffassign (pingcap#35670) config, sysvar: map `max-server-connections` to `max_connections` (pingcap#35453) *: enable durationcheck for nogo linter (pingcap#35661) *: fix issue of cast string as time is incompatible with MySQL (pingcap#35455) ...
Issue Number: ref #35240
Reverts #35438
Only fix this wrong formula on model ver2.
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