golang 连接oracle 11g数据库（改编）

1.安装Oracle的OCI套件(确定系统是否安装gcc和libaio1) 下载地址：https://www.oracle.com/technetwork/database/database-technologies/instant-client/overview/index.html 2.下载版本实例 instantclient-basic-linux.x64-11.2.0.4.0.zip instantclient-sdk-linux.x64-11.2.0.4.0.zip instantclient-sqlplus-linux.x64-11.2.0.4.0.zip（下载地址https://www.oracle.com/database/technologies/instant-client/linux-x86-64-downloads.html） 3.按顺序解压到同一目录 11g: instantclient_11_2 4.root权限移动文件夹到目录 /usr/lib 下 5.root权限执行以下命令 11g: ln /usr/lib/instantclient_11_2/libclntsh.so.11.1 /usr/lib/libclntsh.so ln /usr/lib/instantclient_11_2/libocci.so.11.1 /usr/lib/libocci.so ln /usr/lib/instantclient_11_2/libociei.so /usr/lib/libociei.so ln /usr/lib/instantclient_11_2/libnnz11.so /usr/lib/libnnz12.so 以下两条是为了运行sqlplus ln /usr/lib/instantclient_11_2/libsqlplusic.so /usr/lib/libsqlplusic.so ln /usr/lib/instantclient_11_2/libsqlplus.so /usr/lib/libsqlplus.so 6.把 OCI路径加入系统加载动态库的路径中，并重新加载一次 11g: echo /usr/lib/instantclient_11_2 >> /etc/ld.so.conf ldconfig 7.安装pkg-config [root@localhost ~]# wget http://pkgconfig.freedesktop.org/releases/pkg-config-0.29.2.tar.gz --2018-07-19 15:21:50-- http://pkgconfig.freedesktop.org/releases/pkg-config-0.29.2.tar.gz 正在解析主机 pkgconfig.freedesktop.org... 131.252.210.176, 2610:10:20:722:a800:ff:feda:470f 正在连接 pkgconfig.freedesktop.org|131.252.210.176|:80... 已连接。 已发出 HTTP 请求，正在等待回应... 301 Moved Permanently 位置：https://pkg-config.freedesktop.org/releases/pkg-config-0.29.2.tar.gz [跟随至新的 URL] --2018-07-19 15:21:51-- https://pkg-config.freedesktop.org/releases/pkg-config-0.29.2.tar.gz 正在解析主机 pkg-config.freedesktop.org... 131.252.210.176, 2610:10:20:722:a800:ff:feda:470f 正在连接 pkg-config.freedesktop.org|131.252.210.176|:443... 已连接。 已发出 HTTP 请求，正在等待回应... 200 OK 长度：2016830 (1.9M) [application/x-gzip] 正在保存至: “pkg-config-0.29.2.tar.gz” 60% [==============================================================================> ] 1,212,416 389K/s eta(英国中部时64% [====================================================================================> ] 1,310,720 393K/s eta(英国中部时70% [============================================================================================> ] 1,425,408 401K/s eta(英国中部时76% [===================================================================================================> ] 1,540,096 408K/s eta(英国中部时82% [===========================================================================================================> ] 1,654,784 414K/s eta(英国中部时87% [==================================================================================================================> ] 1,769,472 419K/s eta(英国中部时93% [==========================================================================================================================> ] 1,884,160 424K/s eta(英国中部时99% [=================================================================================================================================> ] 1,998,848 428K/s eta(英国中部时100%[===================================================================================================================================>] 2,016,830 432K/s in 4.6s 2018-07-19 15:21:58 (432 KB/s) - 已保存 “pkg-config-0.29.2.tar.gz” [2016830/2016830]) [root@localhost ~]# tar xvf pkg-config-0.29.2.tar.gz [root@localhost ~]# cd pkg-config-0.29.2 [root@localhost pkg-config-0.29.2]# ./configure --with-internal-glib [root@localhost pkg-config-0.29.2]# make [root@localhost pkg-config-0.29.2]# make install 8.在/usr/lib 目录下创建pkgconfig 目录 9..在/usr/lib/pkgconfig 目录下创建文件oci8.pc,内容如下 11g: prefix= /usr/lib/instantclient_11_2 libdir=${prefix} includedir=${prefix}/sdk/include/ Name: OCI Description: Oracle database engine Version: 11.2 Libs: -L${libdir} -lclntsh Libs.private: Cflags: -I${includedir} 10.在 .bashrc 文件中添加环境变量 11g: # OCI安装目录 export ORACLE_HOME=/usr/lib/instantclient_11_2 tnsnames.ora 文件地址需要创建network和admin目录（此步骤也可以省略） export TNS_ADMIN=$ORACLE_HOME/network/admin OCI安装目录加入动态库加载路径 export LD_LIBRARY_PATH=$ORACLE_HOME oci8.pc文件所在路径 export PKG_CONFIG_PATH=/usr/lib/pkgconfig 11.tnsnames.ora 文件的内容（如果export TNS_ADMIN=$ORACLE_HOME/network/admin 没有设置则不需操作此步骤）内容如下： awsdb= (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.126)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = awsdb) ) ) EXTPROC_CONNECTION_DATA = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1)) ) (CONNECT_DATA = (SID = PLSExtProc) (PRESENTATION = RO) ) ) 安装go-oci8 （准备条件为：安装了git和go语言运行环境） 可连接网络： go get github.com/mattn/go-oci8 不可连接网络： 在Gopath 下创建sql.go 测试连接文件 Sql.go package main import ( "database/sql" "fmt" "log" "os" _ "github.com/mattn/go-oci8" ) func main() { if len(os.Args) != 2 { log.Fatalln(os.Args[0] + " user/password@host:port/sid") } db, err := sql.Open("oci8", os.Args[1]) if err != nil { log.Fatalln(err) } defer db.Close() rows, err := db.Query("select user from dual") if err != nil { log.Fatalln(err) } defer rows.Close() for rows.Next() { var data string rows.Scan(&data) fmt.Println(data) } if err = rows.Err(); err != nil { log.Fatalln(err) } } 编译并运行测试文件 编译：go build –o sql sql.go 运行：./sql system/[email protected]:1521/testpdb

欢迎关注我们的微信公众号，每天学习Go知识