feat(core): Add an option to enable WAL mode for SQLite (#7118)

https://www.sqlite.org/wal.html

packages/cli/src/config/schema.ts

@@ -164,6 +164,12 @@ export const schema = {
 				default: 'database.sqlite',
 				env: 'DB_SQLITE_DATABASE',
 			},
+			enableWAL: {
+				doc: 'Enable SQLite WAL mode',
+				format: Boolean,
+				default: false,
+				env: 'DB_SQLITE_ENABLE_WAL',
+			},
 			executeVacuumOnStartup: {
 				doc: 'Runs VACUUM operation on startup to rebuild the database. Reduces filesize and optimizes indexes. WARNING: This is a long running blocking operation. Will increase start-up time.',
 				format: Boolean,

packages/cli/src/databases/config.ts

@@ -24,6 +24,7 @@ const getDBConnectionOptions = (dbType: DatabaseType) => {
 						UserSettings.getUserN8nFolderPath(),
 						config.getEnv('database.sqlite.database'),
 					),
+					enableWAL: config.getEnv('database.sqlite.enableWAL'),
 			  }
 			: {
 					database: config.getEnv(`database.${configDBType}.database`),

packages/cli/test/integration/shared/testDb.ts

@@ -576,7 +576,7 @@ export async function getVariableById(id: string) {
  * Generate options for an in-memory sqlite database connection,
  * one per test suite run.
  */
-export const getSqliteOptions = ({ name }: { name: string }): ConnectionOptions => {
+const getSqliteOptions = ({ name }: { name: string }): ConnectionOptions => {
 	return {
 		name,
 		type: 'sqlite',
@@ -586,6 +586,7 @@ export const getSqliteOptions = ({ name }: { name: string }): ConnectionOptions
 		migrations: sqliteMigrations,
 		migrationsTableName: 'migrations',
 		migrationsRun: false,
+		enableWAL: config.getEnv('database.sqlite.enableWAL'),
 	};
 };