added seperate transaction for pragma statement

backend/src/scripts/initializeDatabase.ts

@@ -65,7 +65,7 @@ export async function initializeDatabase(): Promise<void> {
 
       console.log('Existing tables found:', existingTables.map(t => t.name).join(', ') || 'none');
 
-      // UPDATED: Drop tables in correct dependency order for new schema
+      // Drop tables in correct dependency order for new schema
       const tablesToDrop = [
         'employee_availability',
         'shift_assignments',
@@ -95,16 +95,40 @@ export async function initializeDatabase(): Promise<void> {
       // Continue with schema creation even if table dropping fails
     }
 
-    // Execute schema creation in a transaction
-    await db.run('BEGIN EXCLUSIVE TRANSACTION');
-    
-    // Execute each statement separately for better error reporting
-    const statements = schema
+    // NEU: PRAGMA-Anweisungen außerhalb der Transaktion ausführen
+    console.log('Executing PRAGMA statements outside transaction...');
+    const pragmaStatements = schema
       .split(';')
       .map(stmt => stmt.trim())
       .filter(stmt => stmt.length > 0)
+      .filter(stmt => stmt.toUpperCase().startsWith('PRAGMA'))
+      .map(stmt => {
+        return stmt.split('\n')
+          .filter(line => !line.trim().startsWith('--'))
+          .join('\n')
+          .trim();
+      });
+
+    for (const statement of pragmaStatements) {
+      try {
+        console.log('Executing PRAGMA:', statement);
+        await db.run(statement);
+      } catch (error) {
+        console.warn('PRAGMA statement might have failed:', statement, error);
+        // Continue even if PRAGMA fails
+      }
+    }
+
+    // Schema-Erstellung in Transaktion
+    await db.run('BEGIN EXCLUSIVE TRANSACTION');
+
+    // Nur die CREATE TABLE und andere Anweisungen (ohne PRAGMA)
+    const schemaStatements = schema
+      .split(';')
+      .map(stmt => stmt.trim())
+      .filter(stmt => stmt.length > 0)
+      .filter(stmt => !stmt.toUpperCase().startsWith('PRAGMA'))
       .map(stmt => {
-        // Remove any single-line comments
         return stmt.split('\n')
           .filter(line => !line.trim().startsWith('--'))
           .join('\n')
@@ -112,7 +136,7 @@ export async function initializeDatabase(): Promise<void> {
       })
       .filter(stmt => stmt.length > 0);
 
-    for (const statement of statements) {
+    for (const statement of schemaStatements) {
       try {
         console.log('Executing statement:', statement.substring(0, 50) + '...');
         await db.run(statement);
@@ -124,7 +148,7 @@ export async function initializeDatabase(): Promise<void> {
       }
     }
 
-    // UPDATED: Insert default data in correct order
+    // Insert default data in correct order
     try {
       console.log('Inserting default employee types...');
       await db.run(`INSERT OR IGNORE INTO employee_types (type, category, has_contract_type) VALUES ('manager', 'internal', 1)`);