clickhouse客户端使用
测试初始化
clickhouse-client -m
create database if not exists test; use test; drop table test; create table test(id UInt8, text String, created DateTime) ENGINE=TinyLog;
shell命令行执行
echo -ne "1, 'some text', '2016-08-14 00:00:00'\n2, 'some more text', '2016-08-14 00:00:01'" | clickhouse-client --database=test --query="INSERT INTO test FORMAT CSV";
cat <<_EOF | clickhouse-client --database=test --query="INSERT INTO test FORMAT CSV";
3, 'some text', '2016-08-14 00:00:00'
4, 'some more text', '2016-08-14 00:00:01'
_EOF
[root@ch2 /]# clickhouse-client --query="select * from test.test " > /tmp/test.tsv [root@ch2 /]# cat /tmp/test.tsv 1 some text 2016-08-14 00:00:00 2 some more text 2016-08-14 00:00:01 3 some text 2016-08-14 00:00:00 4 some more text 2016-08-14 00:00:01
--multiquery 除了 insert
[root@ch2 /]# clickhouse-client --multiquery --query="select * from test.test limit 1;select * from test.test limit 1; " 1 some text 2016-08-14 00:00:00 1 some text 2016-08-14 00:00:00
批模式下的默认数据格式为Tab空格分隔,可使用FORMAT指定格式
使用--multiline或-m参数,允许执行多行的查询
退出客户端的方式,按Ctrl + D 或 Ctrl + C 或 q; quit; exit;
指定参数,格式为: {<name>:<data type>}
name:占位标识符。通过clickhouse-client参数指定,格式为--param_<name> = value 。
data type:指定参数值的数据类型,例如:UInt8、String等。
clickhouse-client --param_myid=1 --database=test --query="select * from test where id>{myid:UInt8}"
clickhouse-client --param_parName="[1, 2]" -q "SELECT * FROM table WHERE a = {parName:Array(UInt16)}"
clickhouse-client --query="select * from test.test FORMAT TabSeparated" > file.tsv
指定数据库
clickhouse-client --database=test --query="select * from test where id>1"
配置文件
clickhouse-client查找配置文件的顺序:
1)通过--config-file指定的配置文件。
2)./clickhouse-client.xml
3)~/.clickhouse-client/config.xml
4)/etc/clickhouse-client/config.xml
# ll /etc/clickhouse-client/ total 4 drwxr-xr-x 2 root root 6 Jul 31 09:46 conf.d -rw-r--r-- 1 root root 1568 May 18 12:26 config.xml
修改默认配置端口
不指定端口时,默认有以下端口
# netstat -tunlp|grep clickhouse tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 340/clickhouse-serv tcp 0 0 127.0.0.1:9004 0.0.0.0:* LISTEN 340/clickhouse-serv tcp 0 0 127.0.0.1:9009 0.0.0.0:* LISTEN 340/clickhouse-serv tcp 0 0 127.0.0.1:8123 0.0.0.0:* LISTEN 340/clickhouse-serv
vim /etc/clickhouse-server/config.xml
<tcp_port>9300</tcp_port>
重启clickhouse
systemctl restart clickhouse-server.service
再次连接需要指定--port
[root@ch2 /]# clickhouse-client --port 9300 ClickHouse client version 20.3.9.70 (official build). Connecting to localhost:9300 as user default. Connected to ClickHouse server version 20.3.9 revision 54433. ch2 :) q; Bye. [root@ch2 /]#
设置默认的客户端连接端口
vim /etc/clickhouse-client/config.xml
<!-- It's a custom prompt settings for the clickhouse-client Possible macros: {host} {port} {user} {database} {display_name} Terminal colors: https://misc.flogisoft.com/bash/tip_colors_and_formattii ng See also: https://wiki.hackzine.org/development/misc/readline-color-promm pt.html --> <port>9300</port>
这样就可以像以前一样,不用每次都输入端口;注释中给了五个可设置的荐,host/port/user/database... 都可以设置默认值,不需要每次都输入
[root@ch2 /]# clickhouse-client ClickHouse client version 20.3.9.70 (official build). Connecting to localhost:9300 as user default. Connected to ClickHouse server version 20.3.9 revision 54433. ch2 :) ch2 :) ch2 :) q; Bye.