Apache Kylin 2.3 样例分析

网上没有找到Apache Kylin 2.3相关的样子，只好参考Apache Kylin 1.x 相关例子，但是运行报错。只好自己慢慢排查，下面做个记录。

select sum(price) as total_price  from kylin_sales ks
where ks.part_dt between '2013-12-01' and '2013-12-31'

select sum(price) as total_price  from kylin_sales ks
where ks.part_dt between '2013-12-01' and '2013-12-31' and ks.region = 'Shanghai'

错误信息

From line 2, column 63 to line 2, column 68: Column 'REGION' not found in table 'KS' while executing SQL: "select sum(price) as total_price from kylin_sales ks where ks.part_dt between '2013-12-01' and '2013-12-31' and ks.region = 'Shanghai'"

查看日志

[root@node1 logs]# vi kylin.log

Message: From line 2, column 81 to line 2, column 86: Column 'REGION' not found in table 'KYLIN_SALES'
while executing SQL: "select sum(price) as total_price  from kylin_sales  where kylin_sales.part_dt between '2013-12-01' and '2013-12-31' and kylin_sales.region = 'Shanghai' LIMIT 50000"
==========================[QUERY]===============================

2018-05-31 09:17:44,366 ERROR [http-bio-7070-exec-1] controller.BasicController:61 :
org.apache.kylin.rest.exception.InternalErrorException: From line 2, column 81 to line 2, column 86: Column 'REGION' not found in table 'KYLIN_SALES'
while executing SQL: "select sum(price) as total_price  from kylin_sales  where kylin_sales.part_dt between '2013-12-01' and '2013-12-31' and kylin_sales.region = 'Shanghai' LIMIT 50000"
        at org.apache.kylin.rest.service.QueryService.doQueryWithCache(QueryService.java:474)
        at org.apache.kylin.rest.service.QueryService.doQueryWithCache(QueryService.java:390)
        at org.apache.kylin.rest.controller.QueryController.query(QueryController.java:86)
        at sun.reflect.GeneratedMethodAccessor178.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
        at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
        at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
        at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)

通过日志分析可知，kylin_sales数据表不存在region字段。
查看表结构，确实没有region字段，已经更名为ops_region

hive> desc  kylin_sales ;
OK
trans_id                bigint                                      
part_dt                 date                    Order Date          
lstg_format_name        string                  Order Transaction Type
leaf_categ_id           bigint                  Category ID         
lstg_site_id            int                     Site ID             
slr_segment_cd          smallint                                    
price                   decimal(19,4)           Order Price         
item_count              bigint                  Number of Purchased Goods
seller_id               bigint                  Seller ID           
buyer_id                bigint                  Buyer ID            
ops_user_id             string                  System User ID      
ops_region              string                  System User Region  
Time taken: 1.693 seconds, Fetched: 12 row(s)
hive> 

重新执行

select sum(price) as total_price  from kylin_sales ks
where ks.part_dt between '2013-12-01' and '2013-12-31' and ks.ops_region = 'Shanghai'

其他例子

select count(distinct seller_id) as total_sellers from kylin_sales

select seller_id, sum(price) as total_price from kylin_sales 
group by seller_id order by sum(price) desc

select count(*) as order_amount from kylin_sales where lstg_site_id = 0