SQL To ElasticSearch Query Converter

Demo website.

This quickie app converts SQL statements into ElasticSearch equivalent queries. Note that the converter is very much a work in progress, and as such, doesn't support great many things.

What works

At the moment the application supports SELECT, FROM, WHERE, GROUP BY statements.
For SELECT, you can either place * or specify column names. The FROM statement works with either aliases or indexes.
The WHERE conditions support a subset of operators: =, >, >=, <, <=, IN, BETWEEN. The GROUP BY statement only supports column names. Columns in the GROUP BY must match those in SELECT.

Examples:

SELECT name, type, state, pin
FROM cities
WHERE name = 'Miami'
   AND state = 'FL'
   AND zipCodes IN (33126, 33151)
   AND averageAge BETWEEN 34 AND 65
   AND averageSalary >= 55230
   AND averageTemperature < 80 

SELECT *
FROM Planets
WHERE SpacecraftWithinKilometers < 10000

SELECT SolarSystem, Galaxy
FROM Planets
WHERE SpacecraftWithinKilometers < 10000
GROUP BY SolarSystem, Galaxy

What doesn't work yet

• Inequality operator (!=)
• Sorting
• Joins (because ElasticSearch doesn't support them)
• Common SQL functions like GetDate, DateDiff, Count(*), etc are not supported yet

The Plan

See the "What doesn't work yet" section