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Questions tagged [amazon-qldb]

Amazon Quantum Ledger Database (Amazon QLDB) is a fully managed ledger database owned by a central trusted authority that provides a transparent, immutable, and cryptographically verifiable transaction log of all of your application changes. Amazon QLDB tracks all application data changes and maintains a complete and verifiable history of changes over time.

What Is Amazon QLDB? - Amazon Quantum Ledger Database (Amazon QLDB)

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can we retrieve document revision by transaction hash in qldb

we're trying to retrieve commited document revision in qldb with its transaction hash. however it is not returning a row that has particular hash while trying below query SELECT * FROM history(Users) AS h WHERE…
ajay
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Amazon QLDB Design Pricinples

I'm wondering the best way to design tables in QLDB and whether it's best to perform joins or perhaps have nested documents. For example, if I have the tables transaction and payment where a payment must be associated to a transaction. Which of the…
amusingalan
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How to get/compute CommitDigest when committing a transaction in AWS QLDB using php?

Whenever i am trying to commit the transaction. It gives an error that digest should be 32 bytes and i try to commit the binary value of digest then it gives an error that the commit digest does not match with the qldb (Ledger) Digest. public…
Ali Qazi
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How can I export the database from AWS QLDB, for migration purpose to any Ethereum platform?

There is an Export journal option available but I don't think it contains all the tables. I want to retrieve the current state of the database. Can anyone please help me on this ? Thank you!
AditiB
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AWS QLDB [ERROR] [Node.js QLDB Sample Code] Unable to create the ledger: ConfigError: Missing region in config

AWS QLDB CreateLedger.js throwing error. ~repo/amazon-qldb-dmv-sample-nodejs$ node dist/CreateLedger.js [LOG][Node.js QLDB Sample Code] Creating a ledger named: vehicle-registration... [AWS qldb undefined 0.005s 0 retries] createLedger({ Name:…
Navin Chandra
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How can we manage large number of users in QLDB?

I am new to QLDB and I am looking forward to use an centralized approach to replace a blockchain solution. It involves multiple stakeholders and we want stakeholder to onboard its multiple users to read their document states(account balance)…
Prachi Gupta
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getting undefined from async await in typescript node

Use case: I am trying to insert a record inside the amazon QLDB using Node and typescript. I am able to insert the record/document successfully and it returns me documentID in return. there are 2 controllers: EntityController and …
Mohit Gupta
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Does Amazon AppSync support Amazon QLDB?

Could anyone let me know if Amazon AppSync supports integration with Amazon QLDB and point me to the right direction? Thanks, Kunal
Kunal Patil
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Is 1500 the limit on concurrent QLDB transactions?

Based on this answer : Amazon QLDB have any scaling/performance limits?
dashuser
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Indexed Storage in QLDB

What is the type of database used in indexed storage as QLDB supports storing structured, semi-structured, nested data and it doesn't enforce schema but it supports PartiQL(SQL compatible access)?
Shivaganesh
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How to make QLDB partitioning effective?

I have to store the transaction data for certain accounts in QLDB, is there any way I can make the partitioning such a way that QLDB store the data for one account on the same server so that my chunking/querying will be faster?
Shital
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Proper way to handle QLDB Session

I want to know how to handle qldb sessions in a node.js application. Should I create one session for the entire scope of the app or should I make a new session before each batch of transactions? Right now I'm creating a session before each…
Alko
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Can we access AWS Quantum DB (QLDB) database from a .NET application?

I am new to AWS Quantum DB (QLDB). I am developing a .NET application that needs to connect to the database that offers immutablity. We came across QLDB that fulfils this requirement. Is it possible to connect to QLDB from a .NET application?
devman
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AWS QLDB - Terraform for creating table

Do anyone knows any CloudFormation to create table (not ledger) at QLDB via Terraform? https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-qldb-ledger.html
André Luís Oliveira
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