relspecgo/pkg/readers/sqlite

SQLite Reader

Reads database schema from SQLite database files.

Usage

import (
    "git.warky.dev/wdevs/relspecgo/pkg/readers"
    "git.warky.dev/wdevs/relspecgo/pkg/readers/sqlite"
)

// Using file path
options := &readers.ReaderOptions{
    FilePath: "path/to/database.db",
}

reader := sqlite.NewReader(options)
db, err := reader.ReadDatabase()

// Or using connection string
options := &readers.ReaderOptions{
    ConnectionString: "path/to/database.db",
}

Features

• Reads tables with columns and data types
• Reads views with definitions
• Reads primary keys
• Reads foreign keys with CASCADE actions
• Reads indexes (non-auto-generated)
• Maps SQLite types to canonical types
• Derives relationships from foreign keys

SQLite Specifics

• SQLite doesn't support schemas, creates single "main" schema
• Uses pure Go driver (modernc.org/sqlite) - no CGo required
• Supports both file path and connection string
• Auto-increment detection for INTEGER PRIMARY KEY columns
• Generated columns (virtual and stored) are read via PRAGMA table_xinfo; the expression is parsed from the CREATE TABLE SQL
• Foreign keys require PRAGMA foreign_keys = ON to be set

Example Schema

PRAGMA foreign_keys = ON;

CREATE TABLE users (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    username VARCHAR(50) NOT NULL UNIQUE,
    email VARCHAR(100) NOT NULL
);

CREATE TABLE posts (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    user_id INTEGER NOT NULL,
    title VARCHAR(200) NOT NULL,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);

Type Mappings

SQLite Type	Canonical Type
INTEGER, INT	int
BIGINT	int64
REAL, DOUBLE	float64
TEXT, VARCHAR	string
BLOB	bytea
BOOLEAN	bool
DATE	date
DATETIME, TIMESTAMP	timestamp