使用SQL语法来查询Elasticsearch：Elasticsearch-SQL

查询elasticsearch使用类似SQL的语法。你还可以使用 ES 函数在SQL中。

Web 前端

安装

Install as plugin:

版本

Elasticsearch 1.X

./bin/plugin -u https://github.com/NLPchina/elasticsearch-sql/releases/download/1.4.6/elasticsearch-sql-1.4.6.zip --install sql

Elasticsearch 2.0.0

./bin/plugin install https://github.com/NLPchina/elasticsearch-sql/releases/download/2.0.1/elasticsearch-sql-2.0.1.zip

After doing this, you need to restart the Elasticsearch server. Otherwise you may get errors likeInvalid index name [sql], must not start with '']; ","status":400}.

基本用法

• Visit The elasticsearch-sql web front end:

http://localhost:9200/_plugin/sql/

• Simple query

http://localhost:9200/_sql?sql=select * from indexName limit 10

• Explain SQL to elasticsearch query DSL

http://localhost:9200/_sql/_explain?sql=select * from indexName limit 10

SQL 用法

• Query

  SELECT * FROM bank WHERE age >30 AND gender = 'm'

• Aggregation

  select COUNT(*),SUM(age),MIN(age) as m, MAX(age),AVG(age)  FROM bank GROUP BY gender ORDER BY SUM(age), m DESC

• Delete

  DELETE FROM bank WHERE age >30 AND gender = 'm'

Beyond sql

• Search

  SELECT address FROM bank WHERE address = matchQuery('880 Holmes Lane') ORDER BY _score DESC LIMIT 3

• Aggregations

  • range age group 20-25,25-30,30-35,35-40

    SELECT COUNT(age) FROM bank GROUP BY range(age, 20,25,30,35,40)

  • range date group by day

    SELECT online FROM online GROUP BY date_histogram(field='insert_time','interval'='1d')

  • range date group by your config

    SELECT online FROM online GROUP BY date_range(field='insert_time','format'='yyyy-MM-dd' ,'2014-08-18','2014-08-17','now-8d','now-7d','now-6d','now')

• ES Geographic

  SELECT * FROM locations WHERE GEO_BOUNDING_BOX(fieldname,100.0,1.0,101,0.0)

• Select type

  SELECT * FROM indexName/type

SQL 特性

• SQL Select
• SQL Delete
• SQL Where
• SQL Order By
• SQL Group By
• SQL AND & OR
• SQL Like
• SQL COUNT distinct
• SQL In
• SQL Between
• SQL Aliases
• SQL Not Null
• SQL(ES) Date
• SQL avg()
• SQL count()
• SQL last()
• SQL max()
• SQL min()
• SQL sum()
• SQL Nulls
• SQL isnull()
• SQL now()

Beyond sql features

• ES TopHits
• ES MISSING
• ES STATS
• ES GEO_INTERSECTS
• ES GEO_BOUNDING_BOX
• ES GEO_DISTANCE
• ES GEOHASH_GRID aggregation

项目主页：http://www.open-open.com/lib/view/home/1447747736056