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喜数据库/ SQL包我可以以两种方式执行查询:我应该在数据库查询中使用Sql.Stmt还是字符串?
第一种方式:用Sql.Stmt
var DeletePermissionStmt *sql.Stmt DeletePermissionStmt, err = database.Prepare(`DELETE FROM permission WHERE permission_id=$1`) if err != nil { log.Errorf("can't prepare delete permission statement: %s", err.Error()) } transaction, err := database.Begin() // assume postgres database is defined previously if err != nil { log.WithFields(logFields).Errorf("can't start transaction: %s", err.Error()) return err } _, err := transaction.Stmt(DeletePermissionStmt).Exec(permission_id)
方式二:使用字符串
var DeletePermissionStmt string DeletePermissionStmt = `DELETE FROM permission WHERE permission_id=$1` transaction, err := database.Begin() // assume postgres database is defined previously if err != nil { log.WithFields(logFields).Errorf("can't start transaction: %s", err.Error()) return err } _, err := transaction.Exec(DeletePermissionStmt,permission_id)
唯一的区别我知道它是不可能使用sql.stmt时,你是转动一些东西,例如Insert Into FOO(f1,f2,f3) Values(v1,v2,v3) returning f_id
有没有其他的区别?我应该什么时候使用每一个?
[Go sql - 准备语句作用域]的相关/可能的重复(http://stackoverflow.com/questions/38390999/go-sql-prepared-statement-scope)。 – icza
'INSERT ... RETURNING ...'如果使用'tx.QueryRow()'支持' –