EJDB2 is an embedded document-oriented database that stores JSON records and provides a query language for retrieving structured information. It is designed for applications that need persistent document storage without operating a separate database server.
The database stores information in a single file using the IOWOW persistent key-value storage engine. JSON documents are organised into collections and accessed through a native programming interface.
EJDB2 uses JQL, a query language with syntax inspired by XPath. It allows applications to navigate JSON structures, select documents using conditions and work with nested information.
The database provides indexing facilities to improve query performance. It also includes online backup functionality, allowing applications to preserve a copy of their data while the database is operating.
Although EJDB2 is primarily intended for embedded use, it can expose database operations through HTTP and WebSocket interfaces. These allow other processes to access stored information without linking directly against the database engine.
EJDB2 also supports collection joins, making it possible to work with information distributed across multiple document collections.
This is free and open source software.
Key Features
- Embedded JSON document storage.
- Single-file database persistence.
- JQL query language with XPath-inspired syntax.
- Queries involving nested JSON structures.
- Collection joins.
- Indexed document retrieval.
- Document creation, modification and deletion.
- JSON document patching.
- Online database backups.
- HTTP REST interface.
- WebSocket database access.
- Native programming interface for embedded applications.
- Cross-platform support – runs on Linux, macOS, and FreeBSD.
Website: github.com/Softmotions/ejdb
Support:
Developer: Softmotions Ltd
License: MIT License
EJDB2 is written in C. Learn C with our recommended free books and free tutorials.
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| CrateDB | Distributed SQL database management |
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