19 lines
740 B
Go
19 lines
740 B
Go
package business
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import "gorm.io/gorm"
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// 区服汇总按创角时间读取原始记录；旧表只有 play_time 索引，导致每日创角扫描全表。
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func migrateServerReportIndex(db *gorm.DB) error {
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if db.Dialector.Name() != "mysql" || !db.Migrator().HasTable("tab_user_play_info") {
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return nil
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}
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var existing int64
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if err := db.Raw("SELECT COUNT(*) FROM information_schema.statistics WHERE table_schema=DATABASE() AND table_name='tab_user_play_info' AND column_name='create_time' AND seq_in_index=1").Scan(&existing).Error; err != nil {
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return err
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}
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if existing > 0 {
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return nil
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}
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return db.Exec("ALTER TABLE tab_user_play_info ADD INDEX idx_sw_play_create_time(create_time), ALGORITHM=INPLACE, LOCK=NONE").Error
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}
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