tpch-kudu

1.在impala里建立好文本表:

create external table customer (C_CUSTKEY INT, C_NAME STRING, C_ADDRESS STRING, C_NATIONKEY INT, C_PHONE STRING, C_ACCTBAL DOUBLE, C_MKTSEGMENT STRING, C_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/user/training/tpch_10g/customer';

create external table lineitem (L_ORDERKEY INT, L_PARTKEY INT, L_SUPPKEY INT, L_LINENUMBER INT, L_QUANTITY DOUBLE, L_EXTENDEDPRICE DOUBLE, L_DISCOUNT DOUBLE, L_TAX DOUBLE, L_RETURNFLAG STRING, L_LINESTATUS STRING, L_SHIPDATE STRING, L_COMMITDATE STRING, L_RECEIPTDATE STRING, L_SHIPINSTRUCT STRING, L_SHIPMODE STRING, L_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/user/training/tpch_10g/lineitem';

create external table nation (N_NATIONKEY INT, N_NAME STRING, N_REGIONKEY INT, N_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/user/training/tpch_10g/nation';

create external table orders (O_ORDERKEY INT, O_CUSTKEY INT, O_ORDERSTATUS STRING, O_TOTALPRICE DOUBLE, O_ORDERDATE STRING, O_ORDERPRIORITY STRING, O_CLERK STRING, O_SHIPPRIORITY INT, O_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/user/training/tpch_10g/orders';

create external table part (P_PARTKEY INT, P_NAME STRING, P_MFGR STRING, P_BRAND STRING, P_TYPE STRING, P_SIZE INT, P_CONTAINER STRING, P_RETAILPRICE DOUBLE, P_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/user/training/tpch_10g/part';

create external table partsupp (PS_PARTKEY INT, PS_SUPPKEY INT, PS_AVAILQTY INT, PS_SUPPLYCOST DOUBLE, PS_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION'/user/training/tpch_10g/partsupp';

create external table region (R_REGIONKEY INT, R_NAME STRING, R_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/user/training/tpch_100g/region';

create external table supplier (S_SUPPKEY INT, S_NAME STRING, S_ADDRESS STRING, S_NATIONKEY INT, S_PHONE STRING, S_ACCTBAL DOUBLE, S_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/user/training/tpch_10g/supplier';

3.建立kudu-impala表

create table customer_kudu (C_CUSTKEY INT, C_NAME STRING, C_ADDRESS STRING, C_NATIONKEY INT, C_PHONE STRING, C_ACCTBAL DOUBLE, C_MKTSEGMENT STRING, C_COMMENT STRING)

TBLPROPERTIES(

  'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

  'kudu.table_name' = 'customer_kudu',

  'kudu.master_addresses' = 'node1:7051',

  'kudu.key_columns' = 'C_CUSTKEY'

);

insert into customer_kudu select * from customer;

create table nation_kudu (N_NATIONKEY INT, N_NAME STRING, N_REGIONKEY INT, N_COMMENT STRING)

TBLPROPERTIES(

  'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

  'kudu.table_name' = 'nation_kudu',

  'kudu.master_addresses' = 'node1:7051',

  'kudu.key_columns' = 'N_NATIONKEY'

);

insert into nation_kudu select * from nation;

create table part_kudu (P_PARTKEY INT, P_NAME STRING, P_MFGR STRING, P_BRAND STRING, P_TYPE STRING, P_SIZE INT, P_CONTAINER STRING, P_RETAILPRICE DOUBLE, P_COMMENT STRING)

TBLPROPERTIES(

  'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

  'kudu.table_name' = 'part_kudu',

  'kudu.master_addresses' = 'node1:7051',

  'kudu.key_columns' = 'P_PARTKEY'

);

insert into part_kudu select * from part;

create table supplier_kudu (S_SUPPKEY INT, S_NAME STRING, S_ADDRESS STRING, S_NATIONKEY INT, S_PHONE STRING, S_ACCTBAL DOUBLE, S_COMMENT STRING)

TBLPROPERTIES(

  'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

  'kudu.table_name' = 'supplier_kudu',

  'kudu.master_addresses' = 'node1:7051',

  'kudu.key_columns' = 'S_SUPPKEY'

);

insert into supplier_kudu select * from supplier;

create table partsupp_kudu (PS_PARTKEY INT, PS_SUPPKEY INT, PS_AVAILQTY INT, PS_SUPPLYCOST DOUBLE, PS_COMMENT STRING)

TBLPROPERTIES(

  'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

  'kudu.table_name' = 'partsupp_kudu',

  'kudu.master_addresses' = 'node1:7051',

  'kudu.key_columns' = 'PS_PARTKEY,PS_SUPPKEY'

);

insert into partsupp_kudu select * from partsupp;

create table region_kudu (R_REGIONKEY INT, R_NAME STRING, R_COMMENT STRING)

TBLPROPERTIES(

  'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

  'kudu.table_name' = 'region_kudu',

  'kudu.master_addresses' = 'node1:7051',

  'kudu.key_columns' = 'R_REGIONKEY'

);

insert into region_kudu select * from region;

create table orders_kudu (O_ORDERKEY INT, O_CUSTKEY INT, O_ORDERSTATUS STRING, O_TOTALPRICE DOUBLE, O_ORDERDATE STRING, O_ORDERPRIORITY STRING, O_CLERK STRING, O_SHIPPRIORITY INT, O_COMMENT STRING)

TBLPROPERTIES(

  'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

  'kudu.table_name' = 'orders_kudu',

  'kudu.master_addresses' = 'node1:7051',

  'kudu.key_columns' = 'O_ORDERKEY'

);

insert into orders_kudu select * from orders;

create table lineitem_kudu (L_ORDERKEY INT, L_LINENUMBER INT, L_PARTKEY INT, L_SUPPKEY INT, L_QUANTITY DOUBLE, L_EXTENDEDPRICE DOUBLE, L_DISCOUNT DOUBLE, L_TAX DOUBLE, L_RETURNFLAG STRING, L_LINESTATUS STRING, L_SHIPDATE STRING, L_COMMITDATE STRING, L_RECEIPTDATE STRING, L_SHIPINSTRUCT STRING, L_SHIPMODE STRING, L_COMMENT STRING)

TBLPROPERTIES(

  'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

  'kudu.table_name' = 'lineitem_kudu',

  'kudu.master_addresses' = 'node1:7051',

  'kudu.key_columns' = 'L_ORDERKEY,L_LINENUMBER'

);

insert into lineitem_kudu select L_ORDERKEY, L_LINENUMBER, L_PARTKEY, L_SUPPKEY, L_QUANTITY, L_EXTENDEDPRICE, L_DISCOUNT, L_TAX, L_RETURNFLAG, L_LINESTATUS, L_SHIPDATE, L_COMMITDATE, L_RECEIPTDATE, L_SHIPINSTRUCT, L_SHIPMODE, L_COMMENT from lineitem;

下面是日志信息:

[node2:] > use tpch_10g;

Query: use tpch_10g

[node2:] > show tables;

Query: show tables

+----------+

| name     |

+----------+

| customer |

| lineitem |

| nation   |

| orders   |

| part     |

| partsupp |

| region   |

| supplier |

+----------+

Fetched  row(s) in .01s

[node2:] > create table customer_kudu (C_CUSTKEY INT, C_NAME STRING, C_ADDRESS STRING, C_NATIONKEY INT, C_PHONE STRING, C_ACCTBAL DOUBLE, C_MKTSEGMENT STRING, C_COMMENT STRING)

              > TBLPROPERTIES(

              >   'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

              >   'kudu.table_name' = 'customer_kudu',

              >   'kudu.master_addresses' = 'node1:7051',

              >   'kudu.key_columns' = 'C_CUSTKEY'

              > );

Query: create table customer_kudu (C_CUSTKEY INT, C_NAME STRING, C_ADDRESS STRING, C_NATIONKEY INT, C_PHONE STRING, C_ACCTBAL DOUBLE, C_MKTSEGMENT STRING, C_COMMENT STRING)

TBLPROPERTIES(

'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

'kudu.table_name' = 'customer_kudu',

'kudu.master_addresses' = 'node1:7051',

'kudu.key_columns' = 'C_CUSTKEY'

)

Fetched  row(s) in .68s

[node2:] > insert into customer_kudu select * from customer;

Query: insert into customer_kudu select * from customer

Inserted  row(s) in .02s

[node2:] > show tables;

Query: show tables

+---------------+

| name          |

+---------------+

| customer      |

| customer_kudu |

| lineitem      |

| nation        |

| orders        |

| part          |

| partsupp      |

| region        |

| supplier      |

+---------------+

Fetched  row(s) in .01s

[node2:] > create table nation_kudu (N_NATIONKEY INT, N_NAME STRING, N_REGIONKEY INT, N_COMMENT STRING)

              > TBLPROPERTIES(

              >   'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

              >   'kudu.table_name' = 'nation_kudu',

              >   'kudu.master_addresses' = 'node1:7051',

              >   'kudu.key_columns' = 'N_NATIONKEY'

              > );

Query: create table nation_kudu (N_NATIONKEY INT, N_NAME STRING, N_REGIONKEY INT, N_COMMENT STRING)

TBLPROPERTIES(

'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

'kudu.table_name' = 'nation_kudu',

'kudu.master_addresses' = 'node1:7051',

'kudu.key_columns' = 'N_NATIONKEY'

)

Fetched  row(s) in .72s

[node2:] > insert into nation_kudu select * from nation;

Query: insert into nation_kudu select * from nation

Inserted  row(s) in .26s

[node2:] > create table part_kudu (P_PARTKEY INT, P_NAME STRING, P_MFGR STRING, P_BRAND STRING, P_TYPE STRING, P_SIZE INT, P_CONTAINER STRING, P_RETAILPRICE DOUBLE, P_COMMENT STRING)

              > TBLPROPERTIES(

              >   'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

              >   'kudu.table_name' = 'part_kudu',

              >   'kudu.master_addresses' = 'node1:7051',

              >   'kudu.key_columns' = 'P_PARTKEY'

              > );

Query: create table part_kudu (P_PARTKEY INT, P_NAME STRING, P_MFGR STRING, P_BRAND STRING, P_TYPE STRING, P_SIZE INT, P_CONTAINER STRING, P_RETAILPRICE DOUBLE, P_COMMENT STRING)

TBLPROPERTIES(

'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

'kudu.table_name' = 'part_kudu',

'kudu.master_addresses' = 'node1:7051',

'kudu.key_columns' = 'P_PARTKEY'

)

Fetched  row(s) in .68s

[node2:] > insert into part_kudu select * from part;

Query: insert into part_kudu select * from part

Inserted  row(s) in .71s

[node2:] > create table supplier_kudu (S_SUPPKEY INT, S_NAME STRING, S_ADDRESS STRING, S_NATIONKEY INT, S_PHONE STRING, S_ACCTBAL DOUBLE, S_COMMENT STRING)

              > TBLPROPERTIES(

              >   'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

              >   'kudu.table_name' = 'supplier_kudu',

              >   'kudu.master_addresses' = 'node1:7051',

              >   'kudu.key_columns' = 'S_SUPPKEY'

              > );

Query: create table supplier_kudu (S_SUPPKEY INT, S_NAME STRING, S_ADDRESS STRING, S_NATIONKEY INT, S_PHONE STRING, S_ACCTBAL DOUBLE, S_COMMENT STRING)

TBLPROPERTIES(

'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

'kudu.table_name' = 'supplier_kudu',

'kudu.master_addresses' = 'node1:7051',

'kudu.key_columns' = 'S_SUPPKEY'

)

Fetched  row(s) in .73s

[node2:] > insert into supplier_kudu select * from supplier_kudu;

Query: insert into supplier_kudu select * from supplier_kudu

Inserted  row(s) in .67s

[node2:] > create table partsupp_kudu (PS_PARTKEY INT, PS_SUPPKEY INT, PS_AVAILQTY INT, PS_SUPPLYCOST DOUBLE, PS_COMMENT STRING)

              > TBLPROPERTIES(

              >   'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

              >   'kudu.table_name' = 'partsupp_kudu',

              >   'kudu.master_addresses' = 'node1:7051',

              >   'kudu.key_columns' = 'PS_PARTKEY,PS_SUPPKEY'

              > );

Query: create table partsupp_kudu (PS_PARTKEY INT, PS_SUPPKEY INT, PS_AVAILQTY INT, PS_SUPPLYCOST DOUBLE, PS_COMMENT STRING)

TBLPROPERTIES(

'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

'kudu.table_name' = 'partsupp_kudu',

'kudu.master_addresses' = 'node1:7051',

'kudu.key_columns' = 'PS_PARTKEY,PS_SUPPKEY'

)

Fetched  row(s) in .72s

[node2:] > insert into partsupp_kudu select * from partsupp_kudu;

Query: insert into partsupp_kudu select * from partsupp_kudu

Inserted  row(s) in .07s

[node2:] > insert into supplier_kudu select * from supplier;

Query: insert into supplier_kudu select * from supplier

Inserted  row(s) in .78s

[node2:] > insert into partsupp_kudu select * from partsupp;

Query: insert into partsupp_kudu select * from partsupp

Inserted  row(s) in .44s

[node2:] > create table region_kudu (R_REGIONKEY INT, R_NAME STRING, R_COMMENT STRING)

              > TBLPROPERTIES(

              >   'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

              >   'kudu.table_name' = 'region_kudu',

              >   'kudu.master_addresses' = 'node1:7051',

              >   'kudu.key_columns' = 'R_REGIONKEY'

              > );

Query: create table region_kudu (R_REGIONKEY INT, R_NAME STRING, R_COMMENT STRING)

TBLPROPERTIES(

'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

'kudu.table_name' = 'region_kudu',

'kudu.master_addresses' = 'node1:7051',

'kudu.key_columns' = 'R_REGIONKEY'

)

Fetched  row(s) in .72s

[node2:] > insert into region_kudu select * from region;

Query: insert into region_kudu select * from region

Inserted  row(s) in .05s

[node2:] > create table lineitem_kudu (L_ORDERKEY INT, L_LINENUMBER INT, L_PARTKEY INT, L_SUPPKEY INT, L_QUANTITY DOUBLE, L_EXTENDEDPRICE DOUBLE, L_DISCOUNT DOUBLE, L_TAX DOUBLE, L_RETURNFLAG STRING, L_LINESTATUS STRING, L_SHIPDATE STRING, L_COMMITDATE STRING, L_RECEIPTDATE STRING, L_SHIPINSTRUCT STRING, L_SHIPMODE STRING, L_COMMENT STRING)

              > TBLPROPERTIES(

              >   'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

              >   'kudu.table_name' = 'lineitem_kudu',

              >   'kudu.master_addresses' = 'node1:7051',

              >   'kudu.key_columns' = 'L_ORDERKEY,L_LINENUMBER'

              > );

Query: create table lineitem_kudu (L_ORDERKEY INT, L_LINENUMBER INT, L_PARTKEY INT, L_SUPPKEY INT, L_QUANTITY DOUBLE, L_EXTENDEDPRICE DOUBLE, L_DISCOUNT DOUBLE, L_TAX DOUBLE, L_RETURNFLAG STRING, L_LINESTATUS STRING, L_SHIPDATE STRING, L_COMMITDATE STRING, L_RECEIPTDATE STRING, L_SHIPINSTRUCT STRING, L_SHIPMODE STRING, L_COMMENT STRING)

TBLPROPERTIES(

'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

'kudu.table_name' = 'lineitem_kudu',

'kudu.master_addresses' = 'node1:7051',

'kudu.key_columns' = 'L_ORDERKEY,L_LINENUMBER'

)

Fetched  row(s) in .72s

[node2:] > insert into lineitem_kudu select L_ORDERKEY, L_LINENUMBER, L_PARTKEY, L_SUPPKEY, L_QUANTITY, L_EXTENDEDPRICE, L_DISCOUNT, L_TAX, L_RETURNFLAG, L_LINESTATUS, L_SHIPDATE, L_COMMITDATE, L_RECEIPTDATE, L_SHIPINSTRUCT, L_SHIPMODE, L_COMMENT from lineitem;

Query: insert into lineitem_kudu select L_ORDERKEY, L_LINENUMBER, L_PARTKEY, L_SUPPKEY, L_QUANTITY, L_EXTENDEDPRICE, L_DISCOUNT, L_TAX, L_RETURNFLAG, L_LINESTATUS, L_SHIPDATE, L_COMMITDATE, L_RECEIPTDATE, L_SHIPINSTRUCT, L_SHIPMODE, L_COMMENT from lineitem

Inserted  row(s) in .42s

[node2:] > create table orders_kudu (O_ORDERKEY INT, O_CUSTKEY INT, O_ORDERSTATUS STRING, O_TOTALPRICE DOUBLE, O_ORDERDATE STRING, O_ORDERPRIORITY STRING, O_CLERK STRING, O_SHIPPRIORITY INT, O_COMMENT STRING)

              > TBLPROPERTIES(

              >   'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

              >   'kudu.table_name' = 'orders_kudu',

              >   'kudu.master_addresses' = 'node1:7051',

              >   'kudu.key_columns' = 'O_ORDERKEY'

              > );

Query: create table orders_kudu (O_ORDERKEY INT, O_CUSTKEY INT, O_ORDERSTATUS STRING, O_TOTALPRICE DOUBLE, O_ORDERDATE STRING, O_ORDERPRIORITY STRING, O_CLERK STRING, O_SHIPPRIORITY INT, O_COMMENT STRING)

TBLPROPERTIES(

'storage_handler' = 'com.cloudera.kudu.hive.KuduStorageHandler',

'kudu.table_name' = 'orders_kudu',

'kudu.master_addresses' = 'node1:7051',

'kudu.key_columns' = 'O_ORDERKEY'

)

Fetched  row(s) in .86s

[node2:] > insert into orders_kudu select * from orders;

Query: insert into orders_kudu select * from orders

Inserted  row(s) in .11s

[node2:] >

3.计算表的统计信息：

compute stats customer;

compute stats lineitem;

compute stats nation;

compute stats orders;

compute stats part;

compute stats partsupp;

compute stats region;

compute stats supplier;

　compute stats customer_kudu;
　ompute stats lineitem_kudu;
　compute stats nation_kudu;
　compute stats orders_kudu;
　compute stats part_kudu;
　compute stats partsupp_kudu;
　compute stats region_kudu;
　compute stats supplier_kudu;

tpch-kudu的更多相关文章

【kudu pk parquet】TPC-H Query2对比解析
这是[kudu pk parquet]的第二篇,query2在kudu和parquet上的对比解析,其中kudu包含有不能下发的谓词. 3台物理机,1T规模的数据集,impala和kudu版本是我们修 ...
Kudu:支持快速分析的新型Hadoop存储系统
Kudu 是 Cloudera 开源的新型列式存储系统,是 Apache Hadoop 生态圈的新成员之一( incubating ),专门为了对快速变化的数据进行快速的分析,填补了以往 Hadoop ...
Kudu – 在快数据上的进行快分析的存储
转自: http://www.tuicool.com/articles/nmYf2uf Cloudera Impala Kudu – 在快数据上的进行快分析的存储 Kudu,对应中文的含义应该 ...
【kudu pk parquet】runtime filter实践
已经有好一阵子没有写博文了,今天给大家带来一篇最近一段时间开发相关的文章:在impala和kudu上支持runtime filter. 大家搜索下实践者社区,可以发现前面已经有好几位同学写了这个主题的 ...
Kudu的性能测试
不多说,直接上干货! Kudu的性能测试 1. kudu和parquet的比较上图是官方给出的用Impala跑TPC-H的测试,对比Parquet和Kudu的计算速度.从图中我们可以发现,Ku ...
Apache Kudu： Hadoop生态系统的新成员实现对快速数据的快速分析
A new addition to the open source Apache Hadoop ecosystem, Apache Kudu completes Hadoop's storage la ...
Kudu，支持快速分析的新型Hadoop存储系统
Kudu是Cloudera开源的新型列式存储系统,是Apache Hadoop生态圈的新成员之一(incubating),专门为了对快速变化的数据进行快速的分析,填补了以往Hadoop存储层的空缺.本 ...
安装Kudu
1.默认安装好yum2.需以root身份安装3.安装ntp yum install ntp -y4.启动ntp /etc/init.d/ntpd start|stop|restart5.添加安装包yu ...
TPC-H生成.tbl文件导入postgresql数据库的坑
数据库project好好的不用主流的MySQL和Microsoft server而要求用听都没听过的postgresql (当然,可能你三个都没听过) 这里的坑主要是把生成的那八张.tbl的表导入pg ...
kudu playground
建表: CREATE TABLE my_first_table ( id BIGINT, name STRING ) TBLPROPERTIES( 'storage_handler' = 'com.c ...

随机推荐

Cocos2d-x 核心概念 - 游戏循环与调度
每一个游戏程序都有一个循环在不断运行,他是由导演对象来管理和维护. 如果需要场景中的精灵运动起来,我们可以在循环中使用定时器(Scheduler)对精灵等对象的运行进行调度因为Node中封装了 Sc ...
原创：Equinox OSGi应用嵌入Jersey框架搭建REST服务
一.环境 eclipse版本:eclipse-luna 4.4 jre版本:1.8 二.Equinox OSGi应用嵌入Jersey框架搭建REST服务 1.新建插件工程HelloWebOSGI a. ...
IaaS、PaaS、SaaS 之间的区别
IaaS.PaaS.SaaS 之间的区别 “云服务”现在已经快成了一个家喻户晓的词了.如果你还不知道PaaS.IaaS和SaaS的区别,那就太out了. “云”其实是互联网的一个隐喻,“云计算”其实就 ...
springmvc接收JSON类型的数据
1.在使用AJAX传递JSON数据的时候要将contentType的类型设置为"application/json",否则的话会提示415错误 2.传递的data需要时JSON类型的 ...
Python文件使用“wb”方式打开，写入内容
Python文件使用"wb"方式打开,写入字符串会报错,因为这种打开方式为:以二进制格式打开一个文件只用于写入.如果该文件已存在则将其覆盖.如果该文件不存在,创建新文件. 所以写入 ...
[C语言入门笔记]循环与运算符
循环与运算符什么是循环? 循环就是一个不停工作的东西,可以反复的实现一个功能,这个才是计算机的重点.计算机可以重复的做一件事情,这样子可以省很多事情循环的种类有哪些? While Do while ...
Linux下配置IP及安装vmware tool
=======================CentOS 7以下======================= 配置IP: 1.获得mac地址 2.编辑ifcfg-eth0文件:vi /etc/sy ...
Ant 常用语法及选项
project 项目定义,一个ant文件就是一个 project,定义了项目名称,起始位置以及默认执行的 target. <project name="Easily" bas ...
建站随手记:about server stack
建站需要,随手记: Server Stack: ----------- 标准的mezzanine的Stack设置前端:Nginx wsgi:gunicorn cms tool: mezzanine ...
关于c#调用java中间件api的几个问题
由于项目需要,做的c#客户端数据库连接串首先肯定不能写死的程序里(数据库很容易被攻击,我们的项目半年改了几次密码...) 放置在配置文件内,都可以看得到,最开始想法将配置文件加密,老师说加密过的文件还 ...

tpch-kudu

tpch-kudu的更多相关文章

随机推荐

热门专题