                 }
             case SQLITE_UPDATE:
                 let observer = unsafeBitCast(observerPointer, to: StatementCompilationObserver.self)
-                observer.insertUpdateEventKind(tableName: String(cString: CString1!), columnName: String(cString: CString2!))
+                observer.insertUpdateEventKind(tableName: String(cString: cString1!), columnName: String(cString: cString2!))
             case SQLITE_TRANSACTION:
                 let observer = unsafeBitCast(observerPointer, to: StatementCompilationObserver.self)
-                let action = UpdateStatement.TransactionStatementInfo.TransactionAction(rawValue: String(cString: CString1!))!
+                let action = UpdateStatement.TransactionStatementInfo.TransactionAction(rawValue: String(cString: cString1!))!
                 observer.transactionStatementInfo = .transaction(action: action)
             case SQLITE_SAVEPOINT:
                 let observer = unsafeBitCast(observerPointer, to: StatementCompilationObserver.self)
-                let name = String(cString: CString2!)
-                let action = UpdateStatement.TransactionStatementInfo.SavepointAction(rawValue: String(cString: CString1!))!
+                let name = String(cString: cString2!)
+                let action = UpdateStatement.TransactionStatementInfo.SavepointAction(rawValue: String(cString: cString1!))!
                 observer.transactionStatementInfo = .savepoint(name: name, action: action)
             case SQLITE_FUNCTION:
-                let functionName = String(cString: CString2!)
+                let functionName = String(cString: cString2!)
                 if functionName.uppercased() == "COUNT" {
                     // As soon as a request uses the COUNT function, we don't
                     // know which table is involved. For example, the

        // As a matter of fact, without this default authorizer, the truncate
        // optimization prevents transaction observers from observing
        // individual deletions.
        sqlite3_set_authorizer(sqliteConnection, { (_, actionCode, CString1, CString2, CString3, CString4) -> Int32 in
            if actionCode == SQLITE_DELETE && String(cString: CString1!) != "sqlite_master" {
                // Prevent [truncate optimization](https://www.sqlite.org/lang_delete.html#truncateopt)
                // so that transaction observers can observe individual deletions.
                return SQLITE_IGNORE

                observer.invalidatesDatabaseSchemaCache = true
            case SQLITE_READ:
                let observer = unsafeBitCast(observerPointer, to: StatementCompilationObserver.self)
                observer.selectionInfo.insert(column: String(cString: cString2!), ofTable: String(cString: cString1!))
            case SQLITE_INSERT:
                let observer = unsafeBitCast(observerPointer, to: StatementCompilationObserver.self)
                observer.databaseEventKinds.append(.insert(tableName: String(cString: cString1!)))
            case SQLITE_DELETE:
                let observer = unsafeBitCast(observerPointer, to: StatementCompilationObserver.self)
                let tableName = String(cString: cString1!)
                if tableName != "sqlite_master" && !observer.isDropTableStatement {
                    observer.databaseEventKinds.append(.delete(tableName: tableName))
                    // Prevent [truncate optimization](https://www.sqlite.org/lang_delete.html#truncateopt)
