gq-to-sql

Convert Microsoft Graph-style query strings ($filter, $select, $expand, etc.) into safe, parameterized SQL queries.

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🚀 Features (v0.2.0)

• ✅ $filter with nested logic and alias support
• ✅ $select, $orderby, $top, $skip
• ✅ $expand=roles($select=label) — JOINs with related tables
• ✅ $apply=groupby(..., aggregate(...))
• ✅ Combine $apply + $filter
• ✅ Table aliases & JOINs from schema
• ✅ placeholderStyle: mysql (?) or postgres ($1, $2, …)

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✨ Example

import { buildSQL } from 'gq-to-sql';

const query = "$select=name&$expand=roles($select=label)&$filter=roles.label eq 'admin'";
const { sql, params } = buildSQL(query, {
  table: 'users',
  schema: {
    users: {
      alias: 'u',
      columns: ['id', 'name', 'role_id'],
      joins: {
        roles: {
          type: 'LEFT',
          on: 'u.role_id = r.id',
          alias: 'r'
        }
      }
    },
    roles: {
      alias: 'r',
      columns: ['id', 'label']
    }
  },
  placeholderStyle: 'postgres'
});

console.log(sql);
// SELECT u.name, r.label FROM users u LEFT JOIN roles r ON u.role_id = r.id WHERE r.label = $1

console.log(params);
// ['admin']

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📦 Install

npm install gq-to-sql

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🧩 Upcoming Ideas

• $count / pagination metadata
• Support for named placeholders (:age, :city)
• CLI playground & playground website