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main.go
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main.go
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package main
import (
"flag"
"fmt"
go_ora "github.com/vtov-kr/go-ora/v2"
"os"
"time"
)
type test1 struct {
Id int64 `oracle:"name:test_id"`
Name string `oracle:"name:test_name"`
}
func createUDT(conn *go_ora.Connection) error {
t := time.Now()
sqlText := `create or replace TYPE TEST_TYPE1 IS OBJECT
(
TEST_ID NUMBER(10, 0),
TEST_NAME VARCHAR2(10)
)`
stmt := go_ora.NewStmt(sqlText, conn)
defer func() {
_ = stmt.Close()
}()
_, err := stmt.Exec(nil)
if err != nil {
return err
}
fmt.Println("Finish create UDT: ", time.Now().Sub(t))
return nil
}
func queryUDT(conn *go_ora.Connection) error {
t := time.Now()
stmt := go_ora.NewStmt("SELECT TEST_TYPE1(10, 'NAME') FROM DUAL", conn)
defer func() {
_ = stmt.Close()
}()
rows, err := stmt.Query(nil)
if err != nil {
return err
}
var (
test test1
)
if oraRows, ok := rows.(*go_ora.DataSet); ok {
for oraRows.Next_() {
err = oraRows.Scan(&test)
if err != nil {
return err
}
}
fmt.Println(test)
}
fmt.Println("Finish query UDT: ", time.Now().Sub(t))
return nil
}
func dropUDT(conn *go_ora.Connection) error {
t := time.Now()
stmt := go_ora.NewStmt("drop type TEST_TYPE1", conn)
defer func() {
_ = stmt.Close()
}()
_, err := stmt.Exec(nil)
if err != nil {
return err
}
fmt.Println("Finish drop UDT: ", time.Now().Sub(t))
return nil
}
func usage() {
fmt.Println()
fmt.Println("user defined type")
fmt.Println(" a complete code of user defined type, query then drop it.")
fmt.Println()
fmt.Println("Usage:")
fmt.Println(` UDT -server server_url`)
flag.PrintDefaults()
fmt.Println()
fmt.Println("Example:")
fmt.Println(` UDT -server "oracle://user:pass@server/service_name"`)
fmt.Println()
}
func main() {
var (
server string
)
flag.StringVar(&server, "server", "", "Server's URL, oracle://user:pass@server/service_name")
flag.Parse()
connStr := os.ExpandEnv(server)
if connStr == "" {
fmt.Println("Missing -server option")
usage()
os.Exit(1)
}
fmt.Println("Connection string: ", connStr)
conn, err := go_ora.NewConnection(connStr)
if err != nil {
fmt.Println("Can't open driver", err)
return
}
err = conn.Open()
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 = createUDT(conn)
if err != nil {
fmt.Println("Can't create UDT", err)
return
}
defer func() {
err = dropUDT(conn)
if err != nil {
fmt.Println("Can't drop UDT", err)
}
}()
err = conn.RegisterType("TEST_TYPE1", test1{})
if err != nil {
fmt.Println("Can't register UDT", err)
return
}
fmt.Println("UDT registered successfully")
err = queryUDT(conn)
if err != nil {
fmt.Println("Can't query UDT", err)
return
}
}