hasura-graphql 集成 pipelinedb 1.0.0

pipelinedb 1.0.0 已经是一个标准的pg 扩展了，同时以前的语法也有变动，但是集成进hasura-graphql 更方便了

使用docker-compose 运行

环境准备

• docker-compose 文件

version: "3"
services:
  db:
   image: dalongrong/pipelinedb:1.0.0
   environment:
   - "POSTGRES_PASSWORD=dalongdemo"
   ports:
   - "5432:5432"
  graphql-engine:
    image: hasura/graphql-engine:v1.0.0-alpha25
    ports:
    - "8080:8080"
    environment:
    - "POSTGRES_PASSWORD:dalongdemo"
    command: >
      /bin/sh -c "
      graphql-engine --database-url postgres://postgres:dalongdemo@db/postgres serve --enable-console;
      "

• 创建pipelinedb stream 数据模型

CREATE FOREIGN TABLE wiki_stream (
        hour timestamp,
        project text,
        title text,
        view_count bigint,
        size bigint)
SERVER pipelinedb;
CREATE VIEW wiki_stats WITH (action=materialize) AS
SELECT hour, project,
        count(*) AS total_pages,
        sum(view_count) AS total_views,
        min(view_count) AS min_views,
        max(view_count) AS max_views,
        avg(view_count) AS avg_views,
        percentile_cont(0.99) WITHIN GROUP (ORDER BY view_count) AS p99_views,
        sum(size) AS total_bytes_served
FROM wiki_stream
GROUP BY hour, project;

添加数据

• insert 数据

可以使用官方的demo（数据比较大，有点慢）
curl -sL http://pipelinedb.com/data/wiki-pagecounts | gunzip | 
        psql -c "
        COPY wiki_stream (hour, project, title, view_count, size) FROM STDIN"
或者直接insert
INSERT INTO wiki_stream (hour,project,title,view_count,size)
VALUES ('2015-07-05 9:00:00','rong','bbb',4,100)
说明： 可以多添加几条数据

配置graphql

添加add 就可以了，新的比以前的更明确了，直接就是view 的明称

• add graphql
  
• 查询
  

说明

使用新的还是比较方便的，同时集成起来也更清晰了

参考资料

http://docs.pipelinedb.com/index.html
https://github.com/rongfengliang/pipelinedb-hasura-graphql