code: func (h *SessionHandle) GetBindRecord(normdOrigSQL, db string) *BindMeta {
  	hash := parser.DigestHash(normdOrigSQL)
  	bindRecords := h.ch[hash]
  	if bindRecords != nil {
  		for _, bindRecord := range bindRecords {
  			if bindRecord.OriginalSQL == normdOrigSQL && bindRecord.Db == db {
  				return bindRecord
  			}
  		}
  	}
  	return nil
  }
docs: // GetBindRecord return the BindMeta of the (normdOrigSQL,db) if BindMeta exist.