connect oracle database with golang in mac os

coding in mac os ,build go file ,test connect to oracle db

在mac os上编写go代码，测试连接oracle数据库

下载 instantclient

instantclient-basic-macos.x64-11.2.0.4.0
instantclient-sdk-macos.x64-11.2.0.4.0
download http://www.oracle.com/technetwork/topics/intel-macsoft-096467.html

解压缩

解压缩两个文件，并且合并到一个目录中。
/Users/nagatyase/instantclient_11_2
/Users/nagatyase/instantclient_11_2/sdk

拷贝，链接

cd /Users/nagatyase/instantclient_11_2
cp libclntsh.dylib.11.1 libclntsh.dylib
ln libclntsh.dylib /usr/lib/libclntsh.dylib
ln libocci.dylib.11.1 /usr/lib/libocci.dylib
ln libociei.dylib /usr/lib/libociei.dylib
ln libnnz11.dylib /usr/lib/libnnz11.dylib

链接失败，执行

sudo chown -R $(whoami)
sudo chown -R $(whoami) /usr/lib

下载 pkg-config

download https://lists.freedesktop.org/archives/pkg-config/2017-March/001084.html
Guide to pkg-config https://people.freedesktop.org/~dbn/pkg-config-guide.html#faq
或者通过brew安装

sudo brew install pkg-config

./configure  --with-internal-glib
 make
 sudo make install

新建oci8.pc

内容如下

prefixdir=/Users/nagatyase/instantclient_11_2
libdir=${prefixdir}
includedir=${prefixdir}/sdk/include
Name: OCI
Description: Oracle database driver
Version: 12.2
Libs: -L${libdir} -lclntsh
Cflags: -I${includedir}

oci8.pc 位置
/Users/nagatyase/instantclient_11_2

设置环境变量

PKG_CONFIG_PATH=/Users/nagatyase/instantclient_11_2
LD_LIBRARY_PATH=/Users/nagatyase/instantclient_11_2

执行测试

go get github.com/mattn/go-oci8

编写oracle_db.go

package main

import (
    "fmt"
    _ "github.com/mattn/go-oci8"
    "database/sql"
)

func main() {
    db, err := sql.Open("oci8", "username/pwd@ip:1521/dbname")
    if err != nil {
        fmt.Println("abc", 123, err)
        return
    }
    defer db.Close()

    if err = db.Ping(); err != nil {
        fmt.Printf("Error connecting to the database: %s\n", err)
        return
    }

    rows, err := db.Query("select 2+2 from dual")
    if err != nil {
        fmt.Println("Error fetching addition")
        fmt.Println(err)
        return
    }
    defer rows.Close()

    for rows.Next() {
        var sum int
        rows.Scan(&sum)
        fmt.Printf("2 + 2 always equals: %d\n", sum)
    }
}

go run oracle_db.go
2 + 2 always equals: 4