查询只是使用varargs来替换sql中的参数,因此,在您的示例中,您只需要执行
rows, err := stmt.Query(10)
例如,这个和第二个示例的内容是动态的,那么您将
stmt, err := db.Prepare("SELECT * FROM awesome_table WHERE id=$1 AND other_field IN ($2, $3)")
rows, err := stmt.Query(10,"this","that")
如果“ IN”部分具有可变的args,则可以执行(播放)
package main
import "fmt"
import "strings"
func main() {
stuff := []interface{}{"this", "that", "otherthing"}
sql := "select * from foo where id=? and name in (?" + strings.Repeat(",?", len(stuff)-1) + ")"
fmt.Println("SQL:", sql)
args := []interface{}{10}
args = append(args, stuff...)
fakeExec(args...)
// This also works, but I think it's harder for folks to read
//fakeExec(append([]interface{}{10},stuff...)...)
}
func fakeExec(args ...interface{}) {
fmt.Println("Got:", args)
}
2020-07-02