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[Directory](/) 2. / 3. sweetrdf/in-memory-store-sqlite ActiveLibrary sweetrdf/in-memory-store-sqlite =============================== RDF in-memory quad store implementation using PDO and SQLite. 2.0.0(1y ago)35001GPL-2.0PHPPHP >=8.0 Since Mar 19Pushed 1y ago1 watchersCompare [ Source](https://github.com/sweetrdf/in-memory-store-sqlite)[ Packagist](https://packagist.org/packages/sweetrdf/in-memory-store-sqlite)[ Docs](https://github.com/sweetrdf/in-memory-store-sqlite)[ RSS](/packages/sweetrdf-in-memory-store-sqlite/feed)WikiDiscussions master Synced 1w ago READMEChangelog (6)Dependencies (5)Versions (7)Used By (0) RDF In-Memory Quad Store ======================== [](#rdf-in-memory-quad-store) [![CI](https://github.com/sweetrdf/in-memory-store-sqlite/workflows/Tests/badge.svg)](https://github.com/sweetrdf/in-memory-store-sqlite/workflows/Tests/badge.svg)[![Scrutinizer Code Quality](https://camo.githubusercontent.com/a5973b8169b5af3a7293099f21f87e736868f17b4dff894660c14b302c801e30/68747470733a2f2f7363727574696e697a65722d63692e636f6d2f672f73776565747264662f696e2d6d656d6f72792d73746f72652d73716c6974652f6261646765732f7175616c6974792d73636f72652e706e673f623d6d6173746572)](https://scrutinizer-ci.com/g/sweetrdf/in-memory-store-sqlite/?branch=master)[![Code Coverage](https://camo.githubusercontent.com/209c3c0228d97ba35de974574e9c644db1dfac4360c5ff3492a85d448142198a/68747470733a2f2f7363727574696e697a65722d63692e636f6d2f672f73776565747264662f696e2d6d656d6f72792d73746f72652d73716c6974652f6261646765732f636f7665726167652e706e673f623d6d6173746572)](https://scrutinizer-ci.com/g/sweetrdf/in-memory-store-sqlite/?branch=master) Proof-of-concept RDF in-memory quad store implementation using PDO and SQLite. Installation ------------ [](#installation) To install this library use Composer via: > composer require sweetrdf/in-memory-store-sqlite Usage ----- [](#usage) Use `InMemoryStoreSqlite::createInstance()` to get a ready-to-use store instance (see example below). Sending SPARQL queries can be done via `query` method. Your data is stored inside an in-memory SQLite database file. **After the script ends all your data inside the store will be gone**. Examples -------- [](#examples) ### Example 1 (First steps) [](#example-1-first-steps) Create a store instance, load a few triples into it and run a query. ``` use sweetrdf\InMemoryStoreSqlite\Store\InMemoryStoreSqlite; // get ready to use store instance $store = InMemoryStoreSqlite::createInstance(); // send a SPARQL query which creates two triples $store->query('INSERT INTO { "baz" . "label1" . }'); // send another SPARQL query asking for all triples $res = $store->query('SELECT * WHERE {?s ?p ?o.}'); $triples = $res['result']['rows']; echo \count($triples); // outputs: 2 // $triples contains result set, which consists of arrays and scalar values ``` SPARQL support -------------- [](#sparql-support) Store supports a lot of SPARQL 1.0/1.1 features. For more information please read [SPARQL-support.md](doc/SPARQL-support.md). Performance ----------- [](#performance) Store uses an in-memory SQLite file configured with: - `PRAGMA synchronous = OFF` - `PRAGMA journal_mode = OFF` - `PRAGMA locking_mode = EXCLUSIVE` - `PRAGMA page_size = 4096` Check [PDOSQLiteAdapter.php](src/PDOSQLiteAdapter.php#L45) for more information. When adding several hundred or more triples at once you may experience increased execution time. Local tests showed that per second around 1500 triples can be added. License ------- [](#license) This work is licensed under the terms of the GPL 2. Acknowledgement --------------- [](#acknowledgement) This work is based on the code of ARC2 from (by Benjamin Nowak and contributors). To see what was extracted check pull request [\#1](https://github.com/sweetrdf/in-memory-store-sqlite/pull/1). ARC2 is dual licensed under the terms of GPL 2 (or later) as well as W3C Software License. ### Health Score 34 — LowBetter than 77% of packages Maintenance38 Infrequent updates — may be unmaintained Popularity17 Limited adoption so far Community8 Small or concentrated contributor base Maturity62 Established project with proven stability Bus Factor1 Top contributor holds 100% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~269 days Recently: every ~333 days Total 6 Last Release 538d ago Major Versions 1.1.1 → 2.0.02024-11-26 ### Community Maintainers ![](https://www.gravatar.com/avatar/f1f662e3acb95efd9208cdcd2c97437db366044aea705985251760efcbd23070?d=identicon)[zozlak](/maintainers/zozlak) --- Top Contributors [![k00ni](https://avatars.githubusercontent.com/u/381727?v=4)](https://github.com/k00ni "k00ni (40 commits)") --- Tags RDFsparqlin-memory store ### Code Quality TestsPHPUnit Code StylePHP CS Fixer ### Embed Badge ![Health badge](/badges/sweetrdf-in-memory-store-sqlite/health.svg) ``` [![Health](https://phpackages.com/badges/sweetrdf-in-memory-store-sqlite/health.svg)](https://phpackages.com/packages/sweetrdf-in-memory-store-sqlite) ``` ### Alternatives [easyrdf/easyrdf EasyRdf is a PHP library designed to make it easy to consume and produce RDF. 62231.5M42](/packages/easyrdf-easyrdf)[semsol/arc2 ARC2 is a PHP library for working with RDF. 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