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main.go
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main.go
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package main
import (
"database/sql"
"fmt"
go_ora "github.com/sijms/go-ora/v2"
"os"
"time"
)
func createTable(conn *sql.DB) error {
t := time.Now()
sqlText := `CREATE TABLE TEMP_TABLE_322(
ID NUMBER(10),
DATA TIMESTAMP
)`
_, err := conn.Exec(sqlText)
if err != nil {
return err
}
fmt.Println("Finish create table: ", time.Now().Sub(t))
return nil
}
func dropTable(conn *sql.DB) error {
t := time.Now()
_, err := conn.Exec("drop table TEMP_TABLE_322 purge")
if err != nil {
return err
}
fmt.Println("Finish drop table: ", time.Now().Sub(t))
return nil
}
func insertData(conn *sql.DB) error {
t := time.Now()
_, err := conn.Exec(`INSERT INTO TEMP_TABLE_322(ID, DATA) VALUES (:1 , :2)`,
1, go_ora.TimeStamp(time.Now()))
if err != nil {
return err
}
fmt.Println("Finish insert data: ", time.Now().Sub(t))
return nil
}
func queryData(conn *sql.DB) error {
t := time.Now()
var data time.Time
err := conn.QueryRow(`SELECT DATA FROM TEMP_TABLE_322 WHERE ID=1`).Scan(&data)
if err != nil {
return err
}
fmt.Println(data)
fmt.Println("Finish query data: ", time.Now().Sub(t))
return nil
}
func main() {
conn, err := sql.Open("oracle", os.Getenv("DSN"))
if err != nil {
fmt.Println("can't open connection: ", err)
return
}
defer func() {
err = conn.Close()
if err != nil {
fmt.Println("can't close connection: ", err)
}
}()
err = createTable(conn)
if err != nil {
fmt.Println("can't create table: ", err)
return
}
defer func() {
err = dropTable(conn)
if err != nil {
fmt.Println("can't drop table: ", err)
}
}()
err = insertData(conn)
if err != nil {
fmt.Println("can't insert data: ", err)
return
}
err = queryData(conn)
if err != nil {
fmt.Println("can't query data: ", err)
return
}
}