commit
de5047f4b2
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@ -392,15 +392,64 @@ curl -u username:password -d '<SQL>' <ip>:<PORT>/rest/sql
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## Go Connector
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TDengine提供了GO驱动程序“taosSql”包。taosSql驱动包是基于GO的“database/sql/driver”接口的实现。用户可在安装后的/usr/local/taos/connector/go目录获得GO的客户端驱动程序。用户需将驱动包/usr/local/taos/connector/go/src/taosSql目录拷贝到应用程序工程的src目录下。然后在应用程序中导入驱动包,就可以使用“database/sql”中定义的接口访问TDengine:
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#### 安装TDengine
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Go的链接器使用了到了 libtaos.so 和taos.h,因此,在使用Go连接器之前,需要在程序运行的机器上安装TDengine以获得相关的驱动文件。
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#### Go语言引入package
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TDengine提供了GO驱动程序“taosSql”包。taosSql驱动包是基于GO的“database/sql/driver”接口的实现。用户可以通过`go get`命令来获取驱动包。
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```sh
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go get github.com/taosdata/TDengine/src/connector/go/src/taosSql
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```
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然后在应用程序中导入驱动包,就可以使用“database/sql”中定义的接口访问TDengine:
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```Go
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import (
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"database/sql"
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_ "taosSql"
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_ "github.com/taosdata/TDengine/src/connector/go/src/taosSql"
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)
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```
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taosSql驱动包内采用cgo模式,调用了TDengine的C/C++同步接口,与TDengine进行交互,因此,在数据库操作执行完成之前,客户端应用将处于阻塞状态。单个数据库连接,在同一时刻只能有一个线程调用API。客户应用可以建立多个连接,进行多线程的数据写入或查询处理。
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更多使用的细节,请参考下载目录中的示例源码。
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#### Go语言使用参考
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在Go程序中使用TDengine写入方法大致可以分为以下几步
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1. 打开TDengine数据库链接
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首先需要调用sql包中的Open方法,打开数据库,并获得db对象
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```go
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db, err := sql.Open(taosDriverName, dbuser+":"+dbpassword+"@/tcp("+daemonUrl+")/"+dbname)
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if err != nil {
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log.Fatalf("Open database error: %s\n", err)
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}
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defer db.Close()
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```
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其中参数为
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- taosDataname: 涛思数据库的名称,其值为字符串"taosSql"
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- dbuser和dbpassword: 链接TDengine的用户名和密码,缺省为root和taosdata,类型为字符串
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- daemonUrl: 为TDengine的地址,其形式为`ip address:port`形式,port填写缺省值0即可。例如:"116.118.24.71:0"
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- dbname:TDengine中的database名称,通过`create database`创建的数据库。如果为空则在后续的写入和查询操作必须通过”数据库名.超级表名或表名“的方式指定数据库名
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2. 创建数据库
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打开TDengine数据库连接后,首选需要创建数据库。基本用法和直接在TDengine客户端shell下一样,通过create database + 数据库名的方法来创建。
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```go
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db, err := sql.Open(taosDriverName, dbuser+":"+dbpassword+"@/tcp("+daemonUrl+")/")
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if err != nil {
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log.Fatalf("Open database error: %s\n", err)
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}
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defer db.Close()
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//准备创建数据库语句
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sqlcmd := fmt.Sprintf("create database if not exists %s", dbname)
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//执行语句并检查错误
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_, err = db.Exec(sqlcmd)
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if err != nil {
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log.Fatalf("Create database error: %s\n", err)
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}
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```
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3. 创建表、写入和查询数据
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在创建好了数据库后,就可以开始创建表和写入查询数据了。这些操作的基本思路都是首先组装SQL语句,然后调用db.Exec执行,并检查错误信息和执行相应的处理。可以参考上面的样例代码
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@ -63,7 +63,7 @@ debver="Version: "$tdengine_ver
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sed -i "2c$debver" ${pkg_dir}/DEBIAN/control
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#get taos version, then set deb name
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debname="tdengine-"${tdengine_ver}".deb"
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debname="TDengine-"${tdengine_ver}".deb"
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# make deb package
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dpkg -b ${pkg_dir} $debname
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@ -2,6 +2,9 @@
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#
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# Generate rpm package for centos
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#set -e
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#set -x
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#curr_dir=$(pwd)
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compile_dir=$1
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output_dir=$2
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@ -24,8 +27,25 @@ if command -v sudo > /dev/null; then
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csudo="sudo"
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fi
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function cp_rpm_package() {
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local cur_dir
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cd $1
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cur_dir=$(pwd)
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for dirlist in $(ls ${cur_dir}); do
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if test -d ${dirlist}; then
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cd ${dirlist}
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cp_rpm_package ${cur_dir}/${dirlist}
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cd ..
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fi
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if test -e ${dirlist}; then
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cp ${cur_dir}/${dirlist} ${output_dir}/TDengine-${tdengine_ver}.rpm
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fi
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done
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}
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if [ -d ${pkg_dir} ]; then
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${csudo} rm -rf ${pkg_dir}
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${csudo} rm -rf ${pkg_dir}
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fi
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${csudo} mkdir -p ${pkg_dir}
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cd ${pkg_dir}
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@ -35,7 +55,8 @@ ${csudo} mkdir -p BUILD BUILDROOT RPMS SOURCES SPECS SRPMS
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${csudo} rpmbuild --define="_version ${tdengine_ver}" --define="_topdir ${pkg_dir}" --define="_compiledir ${compile_dir}" -bb ${spec_file}
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# copy rpm package to output_dir, then clean temp dir
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#echo "rmpbuild end, cur_dir: $(pwd) "
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${csudo} cp -rf RPMS/* ${output_dir}
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#${csudo} cp -rf RPMS/* ${output_dir}
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cp_rpm_package ${pkg_dir}/RPMS
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cd ..
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${csudo} rm -rf ${pkg_dir}
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@ -2,7 +2,7 @@
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%define cfg_install_dir /etc/taos
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%define __strip /bin/true
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Name: tdengine
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Name: TDengine
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Version: %{_version}
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Release: 3%{?dist}
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Summary: tdengine from taosdata
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@ -19,8 +19,8 @@ code_dir="${top_dir}/src"
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release_dir="${top_dir}/release"
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community_dir="${script_dir}/../../../community/src"
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package_name='linux'
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install_dir="${release_dir}/taos-client-${version}-${package_name}-$(echo ${build_time}| tr ': ' -)"
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#package_name='linux'
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install_dir="${release_dir}/TDengine-client-${version}"
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# Directories and files.
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bin_files="${build_dir}/bin/taos ${build_dir}/bin/taosdump ${script_dir}/remove_client.sh"
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@ -16,8 +16,8 @@ build_dir="${compile_dir}/build"
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code_dir="${top_dir}/src"
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release_dir="${top_dir}/release"
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package_name='linux'
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install_dir="${release_dir}/taos-${version}-${package_name}-$(echo ${build_time}| tr ': ' -)"
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#package_name='linux'
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install_dir="${release_dir}/TDengine-${version}"
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# Directories and files.
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bin_files="${build_dir}/bin/taosd ${build_dir}/bin/taos ${build_dir}/bin/taosdemo ${build_dir}/bin/taosdump ${script_dir}/remove.sh"
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@ -29,9 +29,19 @@
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#elif defined(DARWIN)
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char CLIENT_VERSION[] = "Welcome to the TDengine shell from mac, client version:%s ";
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#else
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char CLIENT_VERSION[] = "Welcome to the TDengine shell from linux, client version:%s ";
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#ifdef CLUSTER
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char CLIENT_VERSION[] = "Welcome to the TDengine shell from linux, enterprise client version:%s ";
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#else
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char CLIENT_VERSION[] = "Welcome to the TDengine shell from linux, community client version:%s ";
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#endif
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#endif
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char SERVER_VERSION[] = "server version:%s\nCopyright (c) 2017 by TAOS Data, Inc. All rights reserved.\n\n";
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#ifdef CLUSTER
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char SERVER_VERSION[] = "enterprise server version:%s\nCopyright (c) 2017 by TAOS Data, Inc. All rights reserved.\n\n";
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#else
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char SERVER_VERSION[] = "community server version:%s\nCopyright (c) 2017 by TAOS Data, Inc. All rights reserved.\n\n";
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#endif
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char PROMPT_HEADER[] = "taos> ";
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char CONTINUE_PROMPT[] = " -> ";
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int prompt_size = 6;
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|
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@ -105,6 +105,15 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state) {
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static struct argp argp = {options, parse_opt, args_doc, doc};
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void shellParseArgument(int argc, char *argv[], struct arguments *arguments) {
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char verType[32] = {0};
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#ifdef CLUSTER
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sprintf(verType, "enterprise version: %s\n", version);
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#else
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sprintf(verType, "community version: %s\n", version);
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#endif
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|
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argp_program_version = verType;
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argp_parse(&argp, argc, argv, 0, 0, arguments);
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if (arguments->abort) {
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error(10, 0, "ABORTED");
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|
|
|
@ -55,7 +55,12 @@ int main(int argc, char *argv[]) {
|
|||
exit(EXIT_FAILURE);
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}
|
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} else if (strcmp(argv[i], "-V") == 0) {
|
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printf("version: %s compatible_version: %s\n", version, compatible_version);
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||||
#ifdef CLUSTER
|
||||
printf("enterprise version: %s compatible_version: %s\n", version, compatible_version);
|
||||
#else
|
||||
printf("community version: %s compatible_version: %s\n", version, compatible_version);
|
||||
#endif
|
||||
|
||||
printf("gitinfo: %s\n", gitinfo);
|
||||
printf("buildinfo: %s\n", buildinfo);
|
||||
return 0;
|
||||
|
|
Loading…
Reference in New Issue