此问题的背景基本上是article written by Sachini Jayasekara @ WSO2，称为 使用不同的报告框架与WSO2业务活动监视器 。我或多或少完全相同，但使用REST API定义数据流并调用REST WS API将数据推送到BAM。然后使用HIVE查询获取数据。但是，似乎我错过了一些东西，因为没有显示属性数据。因此查询。
目前使用通过基于Perl的守护进程调用的REST api。这将使用以下流定义和有效负载调用REST API：
{
"name":"currentcostRealtime2.stream",
"version": "1.0.6",
"nickName": "Currentcost Realtime",
"description": "This is the Currentcost realtime stream",
"payloadData":[
{
"name":"sensor",
"type":"INT"
},
{
"name":"temp",
"type":"FLOAT"
},
{
"name":"timestamp",
"type":"STRING"
},
{
"name":"watt",
"type":"INT"
}
]
}
..和有效负载定义..
[
{
"payloadData" : [SENSOR, TEMP, "TIMESTAMP", WATT] ,
}
]
我应该注意，有效负载在提交之前被替换为字符串;例如提交的实际有效负载如下所示：
[
{
"payloadData" : [1, 18.7, "2014-06-15 16:15:56", 1] ,
}
]
查询执行时没有明显的问题，但我现在遇到了BAM中的HIVE查询问题，它给出了条目输出，但不是值。例如。试图现在执行以下HIVE查询：
CREATE TABLE IF NOT EXISTS CurrentCostDataTemp ( sensor INT, temp FLOAT, ts TIMESTAMP, watt INT )
STORED BY 'org.apache.hadoop.hive.cassandra.CassandraStorageHandler'
WITH SERDEPROPERTIES ( "cassandra.host" = "127.0.0.1",
"cassandra.port" = "9160",
"cassandra.ks.name" = "EVENT_KS",
"cassandra.ks.username" = "admin",
"cassandra.ks.password" = "admin",
"cassandra.cf.name" = "currentcostRealtime2_stream",
"cassandra.columns.mapping" = "payload_sensor, payload_temp, payload_timestamp, payload_watt" );
select * from CurrentCostDataTemp;
..但这只给出以下内容（见下面的具体图片） - 例如显示没有属性级别数据。但是，很明显有EVENT_KS条目，因为它输出4行..所以问题是我如何引用数据来提取值，或者是否有其他事情在这里我不知道？：
key sensor temp ts watt
1402816273765::192.168.1.106::9443::52
1402815283659::192.168.1.106::9443::51
1402815238323::192.168.1.106::9443::49
1402815280532::192.168.1.106::9443::50
通过使用Cqlsh检查已验证数据是否在Cassandra中 - 请参阅此处：
cqlsh:EVENT_KS> select * from "currentcostRealtime_stream";
key | Description | Name | Nick_Name | StreamId | Timestamp | Version | meta_ipAdd | payload_sensor | payload_temp | payload_timestamp | payload_watt
----------------------------------------+-----------------------------------------+----------------------------+----------------------+----------------------------------+---------------+---------+------------+----------------+--------------+---------------------+--------------
1402815283659::192.168.1.106::9443::51 | This is the Currentcost realtime stream | currentcostRealtime.stream | Currentcost Realtime | currentcostRealtime.stream:1.0.5 | 1402815283659 | 1.0.5 | null | 1 | 18.7 | 2014-06-15 14:54:43 | 1
1402815238323::192.168.1.106::9443::49 | This is the Currentcost realtime stream | currentcostRealtime.stream | Currentcost Realtime | currentcostRealtime.stream:1.0.5 | 1402815238323 | 1.0.5 | null | 1 | 18.7 | 2014-06-15 14:53:58 | 1
1402815280532::192.168.1.106::9443::50 | This is the Currentcost realtime stream | currentcostRealtime.stream | Currentcost Realtime | currentcostRealtime.stream:1.0.5 | 1402815280532 | 1.0.5 | null | 1 | 18.7 | 2014-06-15 14:54:40 | 1
1402816273765::192.168.1.106::9443::52 | This is the Currentcost realtime stream | currentcostRealtime.stream | Currentcost Realtime | currentcostRealtime.stream:1.0.5 | 1402816273765 | 1.0.5 | null | 1 | 18.7 | 2014-06-15 15:11:13 | 1
(4 rows)
cqlsh:EVENT_KS>
很可能只是一个小问题，只有我监督，但如果其他人看到这个并且也可以做出回应，那就太棒了。
在外部向MySQL DB添加远程表定义时，会创建表和所有表，但似乎问题是转到EVENT_KS表本身的属性数据，并通过HIVE脚本创建和访问
提前致谢！
/约根
[更新 - 周四19日 - 已解决] 了解了这个问题的一些提示。以下代码现在工作正常，这很棒..非常感谢您回复自己的时间..
drop table CurrentCostDataTemp10;
drop table CurrentCostDataTemp_Summary10;
CREATE EXTERNAL TABLE IF NOT EXISTS CurrentCostDataTemp10 ( messageRowID STRING, payload_sensor INT, messageTimestamp BIGINT, payload_temp FLOAT, payload_timestamp BIGINT, payload_timestampmysql STRING, payload_watt INT )
STORED BY 'org.apache.hadoop.hive.cassandra.CassandraStorageHandler'
WITH SERDEPROPERTIES ( "cassandra.host" = "127.0.0.1",
"cassandra.port" = "9160",
"cassandra.ks.name" = "EVENT_KS",
"cassandra.ks.username" = "<USER>",
"cassandra.ks.password" = "<PASSWORD>",
"cassandra.cf.name" = "currentcostsimple5_stream",
"cassandra.columns.mapping" = ":key, payload_sensor, Timestamp, payload_temp, payload_timestamp, payload_timestampmysql, payload_watt" );
CREATE EXTERNAL TABLE IF NOT EXISTS CurrentCostDataTemp_Summary10 ( messageRowID STRING, payload_sensor INT, messageTimestamp BIGINT, payload_temp FLOAT, payload_timestamp BIGINT, payload_timestampmysql STRING, payload_watt INT )
STORED BY 'org.wso2.carbon.hadoop.hive.jdbc.storage.JDBCStorageHandler'
TBLPROPERTIES (
'mapred.jdbc.driver.class' = 'com.mysql.jdbc.Driver',
'mapred.jdbc.url' = 'jdbc:mysql://127.0.0.1:8889/currentcost' ,
'mapred.jdbc.username' = '<USER>',
'mapred.jdbc.password' = '<PASSWORD>',
'hive.jdbc.update.on.duplicate'= 'true',
'hive.jdbc.primary.key.fields' = 'messageRowID',
'hive.jdbc.table.create.query' = 'CREATE TABLE CurrentCostDataTemp1 ( messageRowID VARCHAR(100) NOT NULL PRIMARY KEY, payload_sensor TINYINT(4), messageTimestamp BIGINT, payload_temp FLOAT, payload_timestamp BIGINT, payload_timestampmysql DATETIME, payload_watt INT ) ');
insert overwrite table CurrentCostDataTemp_Summary10 select messageRowID, payload_sensor, messageTimestamp, payload_temp, payload_timestamp, payload_timestampmysql, payload_watt FROM CurrentCostDataTemp10;
Using Different Reporting Frameworks with WSO2 Business Activity Monitor. By Sachini Jayasekara
答案 0 :(得分：0)
尝试按如下方式更改脚本的第1行。
CREATE EXTERNAL TABLE IF NOT NOT EXISTS CurrentCostDataTemp（key STRING，sensor INT，temp FLOAT，ts TIMESTAMP，watt INT）
（如果出现错误，请删除key STRING部分。）
注意：您可能需要在运行上面之前运行DROP TABLE CurrentCostDataTemp，以防它已经创建，之前运行它。
答案 1 :(得分：0)
我已按如下方式修改了您的查询。请试试。
CREATE external TABLE IF NOT EXISTS CurrentCostDataTemp ( key string, sensor INT, temp FLOAT, ts TIMESTAMP, watt INT )
STORED BY 'org.apache.hadoop.hive.cassandra.CassandraStorageHandler'
WITH SERDEPROPERTIES ( "cassandra.host" = "127.0.0.1",
"cassandra.port" = "9160",
"cassandra.ks.name" = "EVENT_KS",
"cassandra.ks.username" = "admin",
"cassandra.ks.password" = "admin",
"cassandra.cf.name" = "currentcostRealtime2_stream",
"cassandra.columns.mapping" = ":key,payload_sensor, payload_temp, payload_timestamp, payload_watt" );
select * from CurrentCostDataTemp;