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main.go
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main.go
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package main
import (
"database/sql"
"fmt"
"log"
"time"
_ "github.com/ClickHouse/clickhouse-go"
)
const query = `
SELECT
number
, randomString(25)
, array(1, 2, 3, 4, 5)
, now()
FROM system.numbers LIMIT 1000000
`
func benchmark(conn *sql.DB) error {
rows, err := conn.Query(query)
if err != nil {
return err
}
for rows.Next() {
var (
col1 uint64
col2 string
col3 []uint8
col4 time.Time
)
if err := rows.Scan(&col1, &col2, &col3, &col4); err != nil {
return err
}
}
return nil
}
func main() {
conn, err := sql.Open("clickhouse", "clickhouse://127.0.0.1:9000")
if err != nil {
log.Fatal(err)
}
start := time.Now()
if err := benchmark(conn); err != nil {
log.Fatal(err)
}
fmt.Println(time.Since(start))
}