opensource/dtm
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opt cron sql

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This commit is contained in:
yedongfu 2021-07-20 21:38:53 +08:00
parent 1bf7fa75df
commit e73e20a867
1 changed files with 2 additions and 1 deletions
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3
dtmsvr/cron.go
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@ -35,8 +35,9 @@ func lockOneTrans(expireIn time.Duration) *TransGlobal {
trans := TransGlobal{} trans := TransGlobal{}
owner := GenGid() owner := GenGid()
db := dbGet() db := dbGet()
// 这里next_cron_time需要限定范围，否则数据量累计之后，会导致查询变慢
dbr := db.Must().Model(&trans). dbr := db.Must().Model(&trans).
Where("next_cron_time < date_add(now(), interval ? second) and status in ('prepared', 'aborting', 'submitted')", int(expireIn/time.Second)). Where("next_cron_time < date_add(now(), interval ? second) and next_cron_time > date_add(now(), interval -3600 second) and status in ('prepared', 'aborting', 'submitted')", int(expireIn/time.Second)).
Limit(1).Update("owner", owner) Limit(1).Update("owner", owner)
if dbr.RowsAffected == 0 { if dbr.RowsAffected == 0 {
return nil return nil