How to fix SQLITE_LOCKED_SHAREDCACHE: Conflict within shared cache in SQLite

# Python - sqlite3
import sqlite3
conn = sqlite3.connect('database.db')  # Shared cache disabled by default

# If it was enabled, disable it
sqlite3.enable_shared_cache(False)

// Node.js - better-sqlite3
const Database = require('better-sqlite3');
const db = new Database('database.db');
// better-sqlite3 does not use shared cache mode by default

// JavaScript - sqlite3
const sqlite3 = require('sqlite3');
const db = new sqlite3.Database('database.db');
// sqlite3 does not use shared cache mode by default

// Go - go-sqlite3
import _ "github.com/mattn/go-sqlite3"
// Shared cache can be enabled via URI parameter
// To disable: do NOT use ?cache=shared in the connection string
db, err := sql.Open("sqlite3", "file:database.db")

import sqlite3
conn = sqlite3.connect('database.db')
conn.execute('PRAGMA journal_mode=WAL')
conn.close()

// Node.js - better-sqlite3
const Database = require('better-sqlite3');
const db = new Database('database.db');
db.pragma('journal_mode = WAL');

-- In SQLite directly
PRAGMA journal_mode=WAL;

import sqlite3
conn = sqlite3.connect('database.db')
conn.execute('PRAGMA read_uncommitted=1')
# Now SELECT queries will not attempt to obtain read locks

// Node.js - better-sqlite3
const Database = require('better-sqlite3');
const db = new Database('database.db');
db.pragma('read_uncommitted = 1');

PRAGMA read_uncommitted=1;

import sqlite3
from threading import Lock

class DatabaseQueue:
    def __init__(self, db_path):
        self.conn = sqlite3.connect(db_path)
        self.lock = Lock()

    def execute(self, query, params=()):
        with self.lock:
            return self.conn.execute(query, params).fetchall()

db = DatabaseQueue('database.db')
# All operations are serialized through the lock
result = db.execute('SELECT * FROM users WHERE id = ?', (1,))

// Node.js - using a mutex or queue
const Database = require('better-sqlite3');
const Mutex = require('async-lock');

class DatabaseQueue {
    constructor(dbPath) {
        this.db = new Database(dbPath);
        this.lock = new Mutex();
    }

    async execute(query, params = []) {
        return this.lock.acquire('db', () => {
            return this.db.prepare(query).all(...params);
        });
    }
}

const db = new DatabaseQueue('database.db');
// All operations serialize through the lock

import sqlite3
conn = sqlite3.connect('database.db')

# GOOD: Transaction is short and committed immediately
try:
    conn.execute('CREATE TABLE users (id INTEGER PRIMARY KEY, name TEXT)')
    conn.commit()
except Exception as e:
    conn.rollback()
    print(f"Error: {e}")

# BAD: Transaction left open indefinitely
cursor = conn.cursor()
cursor.execute('CREATE TABLE users (id INTEGER PRIMARY KEY, name TEXT)')
# If this transaction is not committed, other connections will be blocked

// Node.js - better-sqlite3
const Database = require('better-sqlite3');
const db = new Database('database.db');

// GOOD: Use transactions and commit immediately
const transaction = db.transaction(() => {
    db.exec('CREATE TABLE users (id INTEGER PRIMARY KEY, name TEXT)');
});
transaction();

// BAD: Manual transaction left open
db.exec('BEGIN');
db.exec('CREATE TABLE users (id INTEGER PRIMARY KEY, name TEXT)');
// If COMMIT is not called, schema changes block all other connections