实时OLAP（二）Apache Pinot快速入门

一、编译代码

       git clone [email protected]:apache/incubator-pinot.git

       cd incubator-pinot

       mvn install package -DskipTests -Pbin-dist -DdownloadSources -DdownloadJavadocs -Drat.numUnapprovedLicenses=5000

       cd pinot-distribution/target/apache-pinot-incubating-0.2.0-SNAPSHOT-bin

       chmod +x bin/*.sh

二、离线快速入门

       1、bin/quick-start-offline.sh

   2、 http://localhost:9000/query/

      3、Pinot使用类似SQL的查询语言PQL来查询数据。以下是一些示例查询（完整的文献参考https://pinot.readthedocs.io/en/latest/pql_examples.html#pql）：

/*Total number of documents in the table*/
SELECT count(*) FROM baseballStats LIMIT 0

/*Top 5 run scorers of all time*/
SELECT sum('runs') FROM baseballStats GROUP BY playerName TOP 5 LIMIT 0

/*Top 5 run scorers of the year 2000*/
SELECT sum('runs') FROM baseballStats WHERE yearID=2000 GROUP BY playerName TOP 5 LIMIT 0

/*Top 10 run scorers after 2000*/
SELECT sum('runs') FROM baseballStats WHERE yearID>=2000 GROUP BY playerName

/*Select playerName,runs,homeRuns for 10 records from the table and order them by yearID*/
SELECT playerName,runs,homeRuns FROM baseballStats ORDER BY yearID LIMIT 10

三、实时快速入门      

    1、bin/quick-start-realtime.sh

    2、查询实例       

SELECT * FROM meetupRsvp ORDER BY mtime DESC LIMIT 50