Golang + Oracle 11g + GORM(改) + go-oci8 的数据库驱动测试(超详细)

• Golang + Oracle 11g + XORM + go-oci8 的数据库驱动测试(超详细)
• Golang + Oracle 11g + GORM(改) + go-oci8 的数据库驱动测试(超详细)

一、系统环境介绍:

• Windows 10
• Oracle 11g 64bit
• OCI -> instantclient-basic-windows.x64-12.2.0.1.0
• OCI SDK -> instantclient-sdk-windows.x64-12.1.0.2.0
• MinGW 64bit
• go1.11 windows/amd64

注意:我在Oracle 11g版本下使用 OCI 及 SDK 11.2.0.4.0版本会报错,改用 OCI 12.2.0.1.0 及 SDK 12.1.0.2.0就可以了。

二、安装MinGW,注意安装系统相应的32/64位的版本

1、下载地址:

https://sourceforge.net/projects/mingw-w64/files/

2、安装MinGW

• 双击安装程序

  
  
  双击安装程序
• 修改Architecture为:x86_64,点击 Next > 直到安装完成。注意:安装路径,后面需要用到

• 安装完成目录结构

  
  
  安装完成
• 设置环境变量Path,添加:D:\Tool\MinGW64\mingw64\bin

• 下载 pkg-config.exe,并复制到D:\Tool\MinGW64\mingw64\bin目录下
  下载地址:https://raw.githubusercontent.com/wendal/go-oci8/master/windows/pkg-config.exe
  项目开源地址:https://github.com/wendal/go-oci8
  
  pkg-config.exe
  
  复制后如图:

三、下载Oracle 的 OCI和SDK

1、下载OCI和SDK

https://www.oracle.com/technetwork/topics/winx64soft-089540.html

2、创建存放目录,如:C:\instantclient_11_2,并将上面的两个压缩文件解压到C:\instantclient_11_2中,如图:

• 设置环境变量Path,添加:C:\instantclient_11_2
  

  设置环境变量

• 在D:\Tool\MinGW64\mingw64\lib\pkg-config目录下新建:oci8.pc文件,pkg-config目录也需要新建。注意修改你的OCI目录地址
  新建的目录结构
  

  目录结构
  
  修改oci8.pc中的OCI路径C:\instantclient_11_2

# Package Information for pkg-config
prefix=C:/instantclient_11_2
exec_prefix=C:/instantclient_11_2
libdir=${exec_prefix}
includedir=${prefix}/sdk/include/
Name: OCI
Description: Oracle database engine
Version: 11.2
Libs: -L${libdir} -loci
Libs.private: 
Cflags: -I${includedir}

四、gorm新增Dialect方言

1、在dialects目录下新增oci8/oracle.go文件夹及文件

oracle.go:

package oci8
import _ "github.com/mattn/go-oci8"

2、在根目录下新增dialects_oracle.go文件

dialects_oracle.go:

package gorm
import (
 "crypto/sha1"
 "fmt"
 "reflect"
 "regexp"
 "strconv"
 "strings"
 "time"
 "unicode/utf8"
)
type oracle struct {
 commonDialect
}
func init() {
 RegisterDialect("oci8", &oracle{})
}
func (oracle) GetName() string {
 return "oci8"
}
func (oracle) Quote(key string) string {
 return fmt.Sprintf("\"%s\"", strings.ToUpper(key))
}
func (oracle) SelectFromDummyTable() string {
 return "FROM dual"
}
func (oracle) BindVar(i int) string {
 return fmt.Sprintf(":%d", i)
}
func (s *oracle) DataTypeOf(field *StructField) string {
 var dataValue, sqlType, size, additionalType = ParseFieldStructForDialect(field, s)
 if sqlType == "" {
 switch dataValue.Kind() {
 case reflect.Bool:
 sqlType = "CHAR(1)"
 case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr:
 sqlType = "INTEGER"
 case reflect.Int64, reflect.Uint64:
 sqlType = "NUMBER"
 case reflect.Float32, reflect.Float64:
 sqlType = "FLOAT"
 case reflect.String:
 if size > 0 && size < 255 {
 sqlType = fmt.Sprintf("VARCHAR(%d)", size)
 } else {
 sqlType = "VARCHAR(255)"
 }
 case reflect.Struct:
 if _, ok := dataValue.Interface().(time.Time); ok {
 sqlType = "TIMESTAMP"
 }
 }
 }
 if sqlType == "" {
 panic(fmt.Sprintf("invalid sql type %s (%s) for oci8", dataValue.Type().Name(), dataValue.Kind().String()))
 }
 if strings.TrimSpace(additionalType) == "" {
 return sqlType
 }
 return fmt.Sprintf("%v %v", sqlType, additionalType)
}
func (s oracle) HasIndex(tableName string, indexName string) bool {
 var count int
 s.db.QueryRow("SELECT COUNT(*) FROM USER_INDEXES WHERE TABLE_NAME = :1 AND INDEX_NAME = :2", strings.ToUpper(tableName), strings.ToUpper(indexName)).Scan(&count)
 return count > 0
}
func (s oracle) HasForeignKey(tableName string, foreignKeyName string) bool {
 var count int
 s.db.QueryRow("SELECT COUNT(*) FROM USER_CONSTRAINTS WHERE CONSTRAINT_TYPE = 'R' AND TABLE_NAME = :1 AND CONSTRAINT_NAME = :2", strings.ToUpper(tableName), strings.ToUpper(foreignKeyName)).Scan(&count)
 return count > 0
}
func (s oracle) HasTable(tableName string) bool {
 var count int
 s.db.QueryRow("SELECT COUNT(*) FROM USER_TABLES WHERE TABLE_NAME = :1", strings.ToUpper(tableName)).Scan(&count)
 return count > 0
}
func (s oracle) HasColumn(tableName string, columnName string) bool {
 var count int
 s.db.QueryRow("SELECT COUNT(*) FROM USER_TAB_COLUMNS WHERE TABLE_NAME = :1 AND COLUMN_NAME = :2", strings.ToUpper(tableName), strings.ToUpper(columnName)).Scan(&count)
 return count > 0
}
func (oracle) LimitAndOffsetSQL(limit, offset interface{}) (sql string) {
 if limit != nil {
 if parsedLimit, err := strconv.ParseInt(fmt.Sprint(limit), 0, 0); err == nil && parsedLimit >= 0 {
 sql += fmt.Sprintf("ROWNUM <= %d", limit)
 }
 }
 return
}
func (s oracle) BuildKeyName(kind, tableName string, fields ...string) string {
 keyName := s.commonDialect.BuildKeyName(kind, tableName, fields...)
 if utf8.RuneCountInString(keyName) <= 30 {
 return keyName
 }
 h := sha1.New()
 h.Write([]byte(keyName))
 bs := h.Sum(nil)
 // sha1 is 40 digits, keep first 24 characters of destination
 destRunes := []rune(regexp.MustCompile("(_*[^a-zA-Z]+_*|_+)").ReplaceAllString(fields[0], "_"))
 result := fmt.Sprintf("%s%x", string(destRunes), bs)
 if len(result) <= 30 {
 return result
 }
 return result[:29]
}

五、数据操作测试

测试文件main_test.go,测试前注意先在ggs数据库中添加userinfo表及数据

package example
import (
 "database/sql"
 "encoding/json"
 "github.com/jinzhu/gorm"
 _ "github.com/jinzhu/gorm/dialects/oci8"
 _ "github.com/mattn/go-oci8"
 "testing"
)
type Userinfo struct {
 ID int64 `gorm:"column:id" form:"id"`
 Name string `gorm:"column:name" form:"name"`
}
func (Userinfo) TableName() string {
 return "ggs.USERINFO"
}
var driverName = "oci8"
var dataSourceName = "system/123456@127.0.0.1:1521/ORCL"
// gorm model
func TestOracleDBByModel(t *testing.T) {
 db, err := gorm.Open(driverName, dataSourceName)
 defer db.Close()
 if err != nil {
 t.Error(err)
 }
 var list []Userinfo
 if err = db.Model(&Userinfo{}).Find(&list).Error; err != nil {
 t.Error(err)
 }
 if str, err := json.Marshal(list); err != nil {
 t.Error(err)
 } else {
 t.Log(string(str))
 }
 var count int64
 if err := db.Model(&Userinfo{}).Count(&count).Error; err != nil {
 t.Error(err)
 }
 t.Log("总记录数:", count)
}
// gorm sql
func TestOracleDB(t *testing.T) {
 db, err := gorm.Open(driverName, dataSourceName)
 defer db.Close()
 if err != nil {
 t.Error(err)
 }
 rows, err := db.Raw("select * from ggs.userinfo").Rows()
 if err != nil {
 t.Log(err)
 }
 defer rows.Close()
 for rows.Next() {
 var id int
 var name string
 rows.Scan(&id, &name)
 t.Log(id, name) 
 }
}
// 原生操作 database/sql
func TestMattnOracle(t *testing.T) {
 var db *sql.DB
 var err error
 if db, err = sql.Open(driverName, dataSourceName); err != nil {
 t.Error(err)
 return
 }
 var rows *sql.Rows
 if rows, err = db.Query("select * from ggs.userinfo"); err != nil {
 t.Error(err)
 return
 }
 defer rows.Close()
 for rows.Next() {
 var id int
 var name string
 rows.Scan(&id, &name)
 println(id, name)
 }
}

1、TestOracleDBByModel测试结果

=== RUN TestOracleDBByModel
--- PASS: TestOracleDBByModel (0.05s)
 oracle_test.go:39: [{"ID":1,"Name":"张三"},{"ID":2,"Name":"李四"}]
 oracle_test.go:45: 总记录数: 2
PASS
Process finished with exit code 0

2、TestOracleDB测试结果

=== RUN TestOracleDB
--- PASS: TestOracleDB (0.05s)
 oracle_test.go:64: 1 张三
 oracle_test.go:64: 2 李四
PASS
Process finished with exit code 0

3、TestMattnOracle测试结果

=== RUN TestMattnOracle
--- PASS: TestMattnOracle (0.04s)
 oracle_test.go:86: 1 张三
 oracle_test.go:86: 2 李四
PASS
Process finished with exit code 0

六、错误问题及解决方案

1、OCI版本不一致,报错的相关内容:

In file included from D:/worktools/instantclient_11_2/sdk/include/oci.h:541, from ......\mattn\go-oci8\oci8.go:4: 
D:/worktools/instantclient_11_2/sdk/include/oratypes.h:236:25: error: expected ' =', ',', ';', 'asm' or 'attribute' before 'ubig_ora' typedef unsigned _int64 ubig_ora; ^~~~ 
D:/worktools/instantclient_11_2/sdk/include/oratypes.h:237:25: error: expected ' =', ',', ';', 'asm' or 'attribute' before 'sbig_ora' typedef signed _int64 sbig_ora; ^~~~ In file included from 
D:/worktools/instantclient_11_2/sdk/include/oci.h:3045, from ......\mattn\go-oci8\oci8.go:4: D:/worktools/instantclient_11_2/sdk/include/ociap.h:7459:40: error: unknown type name 'ubig_ora' OraText path, ubig_ora lenp ); ^~~~ 
D:/worktools/instantclient_11_2/sdk/include/ociap.h:7471:36: error: unknown type name 'ubig_ora' uword origin, ubig_ora offset, sb1 dir ); ^~~~ 
D:/worktools/instantclient_11_2/sdk/include/ociap.h:8278:23: error: unknown type name 'sbig_ora' sbig_ora bufferLength, sbig_ora returnLength, ^~~~ 
D:/worktools/instantclient_11_2/sdk/include/ociap.h:8278:46: error: unknown type name 'sbig_ora' sbig_ora bufferLength, sbig_ora returnLength

错误原因:OCI版本问题,我是在Oracle 11g版本下使用 OCI 及 SDK 11.2.0.4.0版本会报错
解决方法:改用 OCI 12.2.0.1.0 及 SDK 12.1.0.2.0就可以了。

2、fatal error: oci.h: No such file or directory

# github.com/mattn/go-oci8
/slview/nms/go/src/github.com/mattn/go-oci8/oci8.go:4:17: fatal error: oci.h: No such file or directory
 #include <oci.h>
 ^
compilation terminated.

错误原因:D:\Tool\MinGW64\mingw64\lib\pkg-config\oci8.pc 配置文件中的路径未修改
解决方法:修改oci8.pc中的路径C:/instantclient_11_2为你的OCI存放路径,如下:

# Package Information for pkg-config
prefix=C:/instantclient_11_2
exec_prefix=C:/instantclient_11_2
libdir=${exec_prefix}
includedir=${prefix}/sdk/include/
Name: OCI
Description: Oracle database engine
Version: 11.2
Libs: -L${libdir} -loci
Libs.private: 
Cflags: -I${includedir}

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