SQL92-JSON

can stringify a JSON into a SQL and viceversa parse a SQL statement and serialize it into a JSON

Installation | API | Examples | Recipes | References | License

Installation

Using npm

With npm do

npm install sql92-json

Using a CDN

Add this to your HTML page

<script src="https://unpkg.com/sql92-json/dist/sql92-json.min.js"></script>

API

Both CommonJS and ES6 imports are supported. Code snippets below use require, it is also possible to do

import { parse, stringify } from 'sql92-json'

stringify

Convert a JSON to SQL

Both require('sql92-json').stringify and require('sql92-json/stringify') are valid.

var json2sql = require('sql92-json').stringify
 
console.log(json2sql({ SELECT: ['*'], FROM: ['revenue'] }))
//
// SELECT *
// FROM revenue
//

parse

Convert an SQL to JSON

Both require('sql92-json').parse and require('sql92-json/parse') are valid.

var sql2json = require('sql92-json').parse
 
console.log(sql2json('SELECT * FROM revenue')
// {
//   SELECT: ['*'],
//   FROM: ['revenue']
// }

Recipes

• Add resultset limit (WiP)
• Compute resultset count
• Prepend pool header
• Table list (PoC)

Examples

See examples folder where every .json file has its homonym .sql.

See for example the following example JSON and its corresponding SQL.

{
  "SELECT": [ { "COUNT": "*", "AS": "num" } ],
  "FROM": [
    {
      "SELECT": ["*"],
      "FROM": ["mytable"],
      "WHERE": [
        "yyyymmdd", { "=": 20170101 },
        { "AND": [ "country", { "IN": ["IT", "US"] } ] },
        { "AND": [
          "categoryid", { "BETWEEN": [100, 200] },
          { "OR": [ "productname", { "!=": "'icecream'" } ] }
        ] }
      ]
    }
  ]
}

SELECT COUNT(*) AS num
FROM (
    SELECT *
    FROM mytable
    WHERE yyyymmdd = 20170101
        AND country IN ( 'IT', 'US' )
        AND (
            categoryid BETWEEN 100 AND 200
            OR productname != 'icecream'
        )
)

References

sql1992.txt was downloaded from here.

License

MIT