Dongyang Li comments

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                                            Dongyang Li

[improve](mow) refactor mow update lock for schema change to reduce txn conflict

# BE Regression && UT Coverage Report Increment line coverage ` ` :tada: [Increment coverage report](http://coverage.selectdb-in.cc/coverage/51301_d8bc877b66391b592136431ce1161e1be78236d6_merge/increment_report/index.html) [Complete coverage report](http://coverage.selectdb-in.cc/coverage/51301_d8bc877b66391b592136431ce1161e1be78236d6_merge/report/index.html) | Category | Coverage | |-------------------|--------------------| | Function Coverage | 61.06%...

[improve](mow) refactor mow update lock for schema change to reduce txn conflict

# Cloud UT Coverage Report Increment line coverage `88.89% (112/126)` :tada: [Increment coverage report](http://coverage.selectdb-in.cc/coverage/c6f2534005d4356f38290f0a91cf059a62750b21_c6f2534005d4356f38290f0a91cf059a62750b21_cloud/increment_report/index.html) [Complete coverage report](http://coverage.selectdb-in.cc/coverage/c6f2534005d4356f38290f0a91cf059a62750b21_c6f2534005d4356f38290f0a91cf059a62750b21_cloud/report/index.html) | Category | Coverage | |-------------------|--------------------| | Function Coverage | 82.82% (1186/1432) |...

[improve](mow) refactor mow update lock for schema change to reduce txn conflict

# Cloud UT Coverage Report Increment line coverage `88.89% (112/126)` :tada: [Increment coverage report](http://coverage.selectdb-in.cc/coverage/95f67ccb053a3e9bec4baef6e2c5ac94b1221ca3_95f67ccb053a3e9bec4baef6e2c5ac94b1221ca3_cloud/increment_report/index.html) [Complete coverage report](http://coverage.selectdb-in.cc/coverage/95f67ccb053a3e9bec4baef6e2c5ac94b1221ca3_95f67ccb053a3e9bec4baef6e2c5ac94b1221ca3_cloud/report/index.html) | Category | Coverage | |-------------------|--------------------| | Function Coverage | 82.93% (1219/1470) |...

[Chore](nereids) Remove DropResource/PolicyStmt

# FE UT Coverage Report Increment line coverage ` 100.00% (5/5)` :tada: [Increment coverage report](http://coverage.selectdb-in.cc/coverage/51860_4aef5e13d5821e917c5c070a417f4ea0ad8f88d0/fe_increment_report/index.html) [Complete coverage report](http://coverage.selectdb-in.cc/coverage/51860_4aef5e13d5821e917c5c070a417f4ea0ad8f88d0/fe_report/index.html)

set-filter-fe-part

Thank you for your contribution to Apache Doris. Don't know what should be done next? See [How to process your PR](https://cwiki.apache.org/confluence/display/DORIS/How+to+process+your+PR). Please clearly describe your PR: 1. What problem was...

[cherry-pick](branch-30) support regexp_replace function with ignore flag options (#50245)

[fix](session variables) Limit query_timeout to within LoadTimeout

# FE UT Coverage Report Increment line coverage ` 20.00% (1/5)` :tada: [Increment coverage report](http://coverage.selectdb-in.cc/coverage/51222_bb1ab838ff2690ba2096e77615ca34647a1552d8/fe_increment_report/index.html) [Complete coverage report](http://coverage.selectdb-in.cc/coverage/51222_bb1ab838ff2690ba2096e77615ca34647a1552d8/fe_report/index.html)

[Chore](nereids) remove KillStmt

# FE UT Coverage Report Increment line coverage `` :tada: [Increment coverage report](http://coverage.selectdb-in.cc/coverage/51804_bc1211ce7fa5a0c94ed8ee00518aa2d0d8c45146/fe_increment_report/index.html) [Complete coverage report](http://coverage.selectdb-in.cc/coverage/51804_bc1211ce7fa5a0c94ed8ee00518aa2d0d8c45146/fe_report/index.html)