transactions

问题 I need to rename two tables in one atomic operation so that user will never be able to see the database in its intermediate state. I'm using MySQL and noticed that this case is perfectly described in the documentation: 13.3.3 Statements That Cause an Implicit Commit The statements listed in this section (and any synonyms for them) implicitly end any transaction active in the current session, as if you had done a COMMIT before executing the statement [...] Data definition language (DDL)

问题 I need to rename two tables in one atomic operation so that user will never be able to see the database in its intermediate state. I'm using MySQL and noticed that this case is perfectly described in the documentation: 13.3.3 Statements That Cause an Implicit Commit The statements listed in this section (and any synonyms for them) implicitly end any transaction active in the current session, as if you had done a COMMIT before executing the statement [...] Data definition language (DDL)

问题 So I'm running into an annoying problem with Laravel update and save. I have a model/table Invoice and invoices , that has a timestamp sent_at . Invoice.php class Invoice extends Model { protected $dates = [ "sent_at", ]; } I have the following function that updates the Invoice : InvoicesController.php : public function postPayInvoice(Request $request, $invoiceId){ $user = $this->apiResponse->user; $invoiceItemIds = $request->input("invoice_item_ids"); $invoice = Invoice::with(["invoiceItems"

问题 So I'm running into an annoying problem with Laravel update and save. I have a model/table Invoice and invoices , that has a timestamp sent_at . Invoice.php class Invoice extends Model { protected $dates = [ "sent_at", ]; } I have the following function that updates the Invoice : InvoicesController.php : public function postPayInvoice(Request $request, $invoiceId){ $user = $this->apiResponse->user; $invoiceItemIds = $request->input("invoice_item_ids"); $invoice = Invoice::with(["invoiceItems"

问题 This is my transaction data data id from to date amount <int> <fctr> <fctr> <date> <dbl> 19521 6644 6934 2005-01-01 700.0 19524 6753 8456 2005-01-01 600.0 19523 9242 9333 2005-01-01 1000.0 … … … … … 1055597 9866 9736 2010-12-31 278.9 1053519 9868 8644 2010-12-31 242.8 1052790 9869 8399 2010-12-31 372.2 Now for each distinct account in from column, I want to keep track of how much transaction amount they sent over last 6 month at the time the transaction was made and so I want to do it

问题 This is my transaction data data id from to date amount <int> <fctr> <fctr> <date> <dbl> 19521 6644 6934 2005-01-01 700.0 19524 6753 8456 2005-01-01 600.0 19523 9242 9333 2005-01-01 1000.0 … … … … … 1055597 9866 9736 2010-12-31 278.9 1053519 9868 8644 2010-12-31 242.8 1052790 9869 8399 2010-12-31 372.2 Now for each distinct account in from column, I want to keep track of how much transaction amount they sent over last 6 month at the time the transaction was made and so I want to do it

问题 I am trying to create a function that InsertOne data by wrap transaction, and I already to replica set in mongodb also, I tried in local and and MongoDB atlas the error were same, here is the code: const MONGODB_URI = "mongodb://localhost:27017,localhost:27018,localhost:27019/?replicaSet=rs" ctx := context.Background() client, err := mongo.Connect(ctx, options.Client().ApplyURI(MONGODB_URI)) if err != nil { panic(err) } db := client.Database("production") defer db.Client().Disconnect(ctx) col

问题 I am trying to create a function that InsertOne data by wrap transaction, and I already to replica set in mongodb also, I tried in local and and MongoDB atlas the error were same, here is the code: const MONGODB_URI = "mongodb://localhost:27017,localhost:27018,localhost:27019/?replicaSet=rs" ctx := context.Background() client, err := mongo.Connect(ctx, options.Client().ApplyURI(MONGODB_URI)) if err != nil { panic(err) } db := client.Database("production") defer db.Client().Disconnect(ctx) col

问题 Recently we have started doing some testing of our Kafka connectors to MSK, Amazon's managed Kafka service. Publishing records seem to work fine however not when transactions are enabled. Our cluster consists of 2 brokers (because we have 2 zones) using the default MSK configuration. We are creating our Java Kafka producer using the following properties: bootstrap.servers=x.us-east-1.amazonaws.com:9094,y.us-east-1.amazonaws.com:9094 client.id=kafkautil max.block.ms=5000 request.timeout.ms

问题 I have a collection in firebase real time database that is a pool of codes that can be used once per 'store'. I need to search for an unused code, then mark it reserved by a store in an atomic fashion. The problem is I can't figure out how to do a transactional search and update in firebase, and the unused code is being 'used' multiple times until it gets updated. const getUnusedCode = (storeID) => { const codeRef = rtdb.ref('codes'); return codeRef .orderByChild(storeID) .equalTo(null)