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main.go
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main.go
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package main
import (
"fmt"
go_ora "github.com/sijms/go-ora/v2"
"log"
"os"
"time"
)
func createTable(conn *go_ora.Connection) error {
t := time.Now()
sqlText := `CREATE TABLE GOORA_TEMP_VISIT(
VISIT_ID number(10) NOT NULL,
NAME VARCHAR2(200),
VAL number(10,2),
VISIT_DATE date,
PRIMARY KEY(VISIT_ID)
)`
_, err := conn.Exec(sqlText)
if err != nil {
return err
}
fmt.Println("Finish create table :", time.Now().Sub(t))
return nil
}
func dropTable(conn *go_ora.Connection) error {
t := time.Now()
_, err := conn.Exec("drop table GOORA_TEMP_VISIT purge")
if err != nil {
return err
}
fmt.Println("Finish drop table: ", time.Now().Sub(t))
return nil
}
func deleteData(conn *go_ora.Connection) error {
t := time.Now()
_, err := conn.Exec("TRUNCATE TABLE GOORA_TEMP_VISIT")
if err != nil {
return err
}
fmt.Println("Finish delete data: ", time.Now().Sub(t))
return nil
}
func copyData(conn *go_ora.Connection, rowNum int) error {
t := time.Now()
bulk := go_ora.NewBulkCopy(conn, "GOORA_TEMP_VISIT")
bulk.ColumnNames = []string{"VISIT_ID", "NAME", "VAL", "VISIT_DATE"}
err := bulk.StartStream()
if err != nil {
return err
}
val := 1.1
for x := 0; x < rowNum; x++ {
err = bulk.AddRow(x+1, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ",
val, time.Now())
if err != nil {
_ = bulk.Abort()
return err
}
val += 0.1
}
err = bulk.EndStream()
if err != nil {
_ = bulk.Abort()
return err
}
err = bulk.Commit()
if err != nil {
_ = bulk.Abort()
return err
}
fmt.Printf("%d rows copied: %v\n", rowNum, time.Now().Sub(t))
return nil
}
func main() {
conn, err := go_ora.NewConnection(os.Getenv("DSN"))
if err != nil {
log.Fatalf("Err conn: %v", err)
}
err = conn.Open()
if err != nil {
log.Fatalf("Err open: %v", err)
}
defer func() {
_ = conn.Close()
}()
//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)
// return
// }
//}()
err = deleteData(conn)
if err != nil {
fmt.Println("Can't delete data: ", err)
return
}
err = copyData(conn, 1000000)
if err != nil {
fmt.Println("Can't copy data: ", err)
}
}