ajlrza/kojindb

How ajlrza/kojindb works

RailDB is a proof-of-concept hybrid graph/relational database. Its visible CLI accepts login or registration input and writes account-named files through the storage layer; the README describes the broader intended flow as account authentication, token-based query sessions, and query execution. The implementation also contains table/schema, memory, graph-routing, planning, and transaction modules, but several are skeletal or unsampled. Edges below are limited to relationships shown in excerpts or documented in the README; unsampled subsystems are included without guessed wiring.

Main entry points: storage.cpp Storage Manager · query_planner.cpp Query Planner · cli_engine.cpp CLI Engine · account_management.cpp Account Management

Components 16

User Interface

CLI Engine src/engine/cli_engine.cpp
Account Management src/engine/account_management.cpp

Query Processing

Query Sessions src/query_processor/query_processor.cpp
Query Lexer src/query_processor/query_processor.cpp
Query Executor src/query_processor/query_processor.cpp
Query Planner src/query_planner/query_planner.cpp
Graph Router src/query_planner/hexastore_router.cpp

Data Management

Storage Manager src/storage_manager/storage.cpp
Filesystem
Table Management src/table_management/table_management.cpp
Data Types src/include/data_type_template.h
Property Graph src/include/hexastore_router.h
B-Tree Mirrors src/include/storage.h

Runtime Infrastructure

Memory Management src/memory_manager/memory_management.cpp
Transaction Manager src/transaction_manager/transaction_manager.cpp

Other components

Database User

Connections 12

Database User → CLI Engine: enters input src/engine/cli_engine.cpp
CLI Engine → Storage Manager: creates and writes src/engine/cli_engine.cpp
Storage Manager → Filesystem: reads and writes src/storage_manager/storage.cpp
Query Executor → Query Lexer: tokenizes query src/query_processor/query_processor.cpp
Database User → Account Management: registers or logs in README.md
Account Management → Query Sessions: authenticates sessions README.md
Query Sessions → Query Executor: executes queries README.md
Query Planner → Graph Router: plans graph queries
Query Planner → B-Tree Mirrors: plans relational queries README.md
Graph Router → Property Graph: routes graph traversal README.md
Storage Manager → Table Management: uses table definitions src/storage_manager/storage.cpp
Storage Manager → Data Types: imports data types src/storage_manager/storage.cpp

Drawn by GitDiagram on November 13, 2026 from the repository's file tree, README and source files. Read as Markdown ·