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gorm version v1.20.1

// Exec execute raw sql
func (db *DB) Exec(sql string, values ...interface{}) (tx *DB)

In the Exec function, if the sql parameter contains @,? characters, etc., and the values parameter is not passed in, the Exec function executes an error.

example：

query := `UPDATE "1_buffer_data" SET value = '@1Condition?' WHERE "id" = '1';`
err := DBConn.Debug().Exec(query).Error
if err != nil {
   return err
// Output:
// runtime error: index out of range [0] with length 0