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Co-authored-by: Tim Vaillancourt <tim@timvaillancourt.com>
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wangzihuacool 2022-11-29 10:30:01 +08:00 committed by GitHub
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go/cmd/gh-ost/main.go
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@ -68,7 +68,7 @@ func main() {
flag.StringVar(&migrationContext.OriginalTableName, "table", "", "table name (mandatory)")
flag.StringVar(&migrationContext.AlterStatement, "alter", "", "alter statement (mandatory)")
flag.BoolVar(&migrationContext.AttemptInstantDDL, "attempt-instant-ddl", false, "Attempt to use instant DDL for this migration first")
storageEngine := flag.String("storage-engine", "innodb", "Specify table storage engine (default: 'innodb'). When 'rocksdb': change session transaction isolation level to READ_COMMITTED.")
storageEngine := flag.String("storage-engine", "innodb", "Specify table storage engine (default: 'innodb'). When 'rocksdb': the session transaction isolation level is changed from REPEATABLE_READ to READ_COMMITTED.")
flag.BoolVar(&migrationContext.CountTableRows, "exact-rowcount", false, "actually count table rows as opposed to estimate them (results in more accurate progress estimation)")
flag.BoolVar(&migrationContext.ConcurrentCountTableRows, "concurrent-rowcount", true, "(with --exact-rowcount), when true (default): count rows after row-copy begins, concurrently, and adjust row estimate later on; when false: first count rows, then start row copy")