package main
import (
     "time"
     "fmt"
     "database/sql"
     _ "github.com/lib/pq"
)
func main() {
     // Connect to db:
     var err error
     db, err := sql.Open("postgres", "host=localhost port=5433 user=postgres
password=*** dbname=postgres sslmode=disable")
     if err != nil {
        fmt.Println(`Could not connect to db`)
        panic(err)
     }
// INSERT in cycle :
// A = 4_(каждые 4мс)   B = 1000_(одна секунда) //      249_(итераций) = (B/A -1).
ticker := time.NewTicker(time.Millisecond * 4)  // A
go func() {
    for t := range ticker.C {

        rows, err := db.Query("INSERT INTO public.tbl_sss (p8) VALUES ('ins_01')")
        if err != nil {
            fmt.Println(`Could not connect to db`)
            panic(err)
        }
        defer rows.Close()
    }
}()
time.Sleep(time.Millisecond * 1000)             // B
ticker.Stop()
//
defer db.Close()
}

пишет : t declared and not used