ElasticSQL
-----------
ElasticSQL package converts SQL to ElasticSearch DSL
SQL Features Support:
- [x] SQL Select
- [x] SQL Where
- [x] SQL Order BySQL
- [x] SQL Group By
- [x] SQL AND & OR
- [x] SQL Like & NOT Like
- [x] SQL COUNT distinct
- [x] SQL In & Not In
- [x] SQL Between
- [x] SQL avg()、count(*), count(field), min(field), max(field)
Beyond SQL Features Support：
- [x] ES TopHits
- [x] ES date_histogram
- [x] ES STATS
- [x] ES RANGE
- [x] ES DATE_RANGE
Improvement : now the query DSL is much more flat
SQL Usage
Query
select * from test where a=1 and b="c" and create_time between '2015-01-01T00:00:00+0800' and '2016-01-01T00:00:00+0800' and process_id > 1 order by id desc limit 100,10
Aggregation
select avg(age),min(age),max(age),count(student),count(distinct student) from test group by grade,class limit 10
Beyond SQL
- 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 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")
- range date group by day
select * from test group by date_histogram(field="changeTime",interval="1h",format="yyyy-MM-dd HH:mm:ss")
- stats
SELECT online FROM online group by stats(field="grade")
- topHits
select top_hits(field="class", hitssort="age:desc", taglimit = "10", hitslimit = "1", _source="name,age,class,gender") from school
PKG Usage
-------------
go get github.com/farmerx/elasticsql
Demo :
package main
import (
"fmt"
"github.com/farmerx/elasticsql"
)
var sql = `
select * from test where a=1 and b="c" and create_time between '2015-01-01T00:00:00+0800' and '2016-01-01T00:00:00+0800' and process_id > 1 order by id desc limit 100,10
`
var sql2= `
select avg(age),min(age),max(age),count(student) from test group by class limit 10
`
var sql3= `
select * from test group by class,student limit 10
`
var sql4 = `
select * from test group by date_histogram(field="changeTime",interval="1h",format="yyyy-MM-dd HH:mm:ss")
`
func main() {
esql := elasticsql.NewElasticSQL(eslasticsql.InitOptions{})
table, dsl, err := esql.SQLConvert(sql)
fmt.Println(table, dsl, err)
}
项目地址
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