forked from sijms/go-ora
-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.go
254 lines (236 loc) · 5.23 KB
/
main.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
package main
import (
"database/sql/driver"
"flag"
"fmt"
go_ora "github.com/vtov-kr/go-ora/v2"
"os"
"time"
)
type test1 struct {
name string
}
func (t *test1) Scan(src any) error {
t.name = fmt.Sprintf("%v", src)
return nil
}
type visit struct {
//Id int64 `db:"name:visit_id"`
// string replaced with new type that implement sql.Scanner interface
Name test1 `db:"name:name"`
Val float32 `db:"name:val"`
//Date time.Time `db:"name:visit_date"`
}
func createTable(conn *go_ora.Connection) error {
t := time.Now()
sqlText := `CREATE TABLE GOORA_TEMP_VISIT(
VISIT_ID number(10) NOT NULL,
NAME VARCHAR(200),
VAL number(10,2),
VISIT_DATE date,
PRIMARY KEY(VISIT_ID)
)`
stmt := go_ora.NewStmt(sqlText, conn)
_, err := stmt.Exec(nil)
if err != nil {
return err
}
fmt.Println("Finish create table GOORA_TEMP_VISIT :", time.Now().Sub(t))
return nil
}
func insertData(conn *go_ora.Connection) error {
t := time.Now()
index := 1
stmt, err := conn.Prepare(`INSERT INTO GOORA_TEMP_VISIT(VISIT_ID, NAME, VAL, VISIT_DATE)
VALUES(:1, :2, :3, :4)`)
if err != nil {
return err
}
defer func() {
_ = stmt.Close()
}()
nameText := "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
val := 1.1
for index = 1; index <= 100; index++ {
_, err = stmt.Exec([]driver.Value{index, nameText, val, time.Now()})
if err != nil {
return err
}
val += 1.1
}
fmt.Println("100 rows inserted: ", time.Now().Sub(t))
return nil
}
func queryData(conn *go_ora.Connection) error {
t := time.Now()
stmt := go_ora.NewStmt("SELECT VISIT_ID, NAME, VAL, VISIT_DATE FROM GOORA_TEMP_VISIT", conn)
rows, err := stmt.Query_(nil)
if err != nil {
return err
}
defer func() {
err = stmt.Close()
if err != nil {
fmt.Println("Can't close connection: ", err)
}
}()
//var (
// id int64
// name string
// val float32
// date time.Time
//)
var vi visit
var Id int
var Date time.Time
for rows.Next_() {
err = rows.Scan(&Id, &vi, &Date)
if err != nil {
return err
}
fmt.Println("ID: ", Id, "\tName: ", vi.Name, "\tval: ", vi.Val, "\tDate: ", Date)
}
fmt.Println("Finish query rows: ", time.Now().Sub(t))
return nil
}
type db_TS struct {
S1C1 string `db:"name:s1c1"`
S1C2 string `db:"name:s1c2"`
S2C1 string `db:"name:s2c1"`
S2C2 string `db:"name:s2c2"`
}
func queryTest2(conn *go_ora.Connection) error {
var DBID int = 0
stmt := go_ora.NewStmt("select 1 as DBID from dual", conn) // It's an integer, an Oracle number to be more precise.
defer func() {
err := stmt.Close()
if err != nil {
fmt.Println("Can't close stmt: ", err)
}
}()
rows, err := stmt.Query_(nil)
if err != nil {
return err
}
rows.Next_()
err = rows.Scan(&DBID)
if err != nil {
return err
}
fmt.Printf("%#v\n", DBID)
return nil
}
func queryTest(conn *go_ora.Connection) error {
queries := []string{
"select 's1c1' as s1c1, 's1c2' as s1c2 from dual",
"select 's2c1' as s2c1, 's2c2' as s2c2 from dual",
}
for _, query := range queries {
stmt := go_ora.NewStmt(query, conn)
defer func() {
err := stmt.Close()
if err != nil {
fmt.Println("Can't close stmt: ", err)
}
}()
rows, err := stmt.Query_(nil)
if err != nil {
return err
}
rowsCount := 0
var db db_TS
for rows.Next_() {
err = rows.Scan(&db)
if err != nil {
return err
}
rowsCount += 1
}
fmt.Println("Rows count: ", rowsCount)
}
return nil
}
func dropTable(conn *go_ora.Connection) error {
t := time.Now()
stmt := go_ora.NewStmt("drop table GOORA_TEMP_VISIT purge", conn)
_, err := stmt.Exec(nil)
if err != nil {
return err
}
fmt.Println("Finish drop table: ", time.Now().Sub(t))
return nil
}
func usage() {
fmt.Println()
fmt.Println("query_to_struct")
fmt.Println(" a complete code of create table insert, query to struct then drop table.")
fmt.Println()
fmt.Println("Usage:")
fmt.Println(` query_to_struct -server server_url`)
flag.PrintDefaults()
fmt.Println()
fmt.Println("Example:")
fmt.Println(` query_to_struct -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 create connection: ", 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 = 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
}
err = queryTest(conn)
if err != nil {
fmt.Println("Can't query data: ", err)
return
}
err = queryTest2(conn)
if err != nil {
fmt.Println("Can't query 2: ", err)
return
}
}