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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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Lambda random long execution while running QLDB query

I have a lambda triggered by a SQS FIFO queue when there are messages on this queue. Basically this lambda is getting the message from the queue and connecting to QLDB through a VPC endpoint in order to run a simple SELECT query and a subsequent…
Thiago Scodeler
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how should define a PRIMARY KEY in PartiQL at Amazon QLDB?

I want to define a primary key in QLDB that the query language is PartiQL, how can I define ID as a primary key? CREATE TABLE CarInfo WITH (aws_tags = `{ 'ID': INT, 'Manufacturer': STRING, 'ProductionYear': year, 'Model':STRING, 'VIN':STRING,…
amin
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Is the QLDB sum() fuction optimized?

We want to query our QLDB Ledger using the SUM() function (with a WHERE clause referring only to indexed fields). e.g., select count(*), sum(NonIndexedField) from myTable where IndexedField1 = "foo" and IndexedField2 = "bar"; Is this a good or bad…
Animesh
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Guides or Examples for Mocking QLDB operations & transactions

I am currently writing an application that is writing to a QLDB ledger. I have a function like: // Use an interface that matches the QLDB Driver so we can inject / mock type ILedgerDriver interface { Execute(ctx context.Context, fn func(txn…
Chris Sargent
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Laravel Aws\Laravel\AwsServiceProvider::class Not found

I want to use AWS QLDB Client using aws sdk in laravel v7 I have followed all procedures written here. I'm getting this error Aws\Laravel\AwsServiceProvider::class Not found
Malik Hanzala
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BadRequestException: no open transaction, qldb, nodejs driver

I set up my nodejs app with qldb to implement a wallet service. Set up some tests with some success tests and some expected error tests and once in a while this error 'BadRequestException: no open transaction' would happen and cause my tests to…
Kim Luu
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Optimizing time range filters in Amazon QLDB

I am working on a ledger with a table of Transactions. Each entry has a transaction_id, account_id, timestamp and other metadata. I need to query for all Transactions for a given account_id with a between operator on timestamp My planned approach…
Imtiaz
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How to decode ion_binary of Amazon QLDB in ruby

I was playing with QLDB of Amazon with ruby and used the aws-sdk-qldb and aws-sdk-qldbsession gem. I was getting result as IonBinary. But not able to decode and parse it. Following is the code cred =…
Syed Samiuzzaman
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Finding Commit Digest for Amazon QLDB

I'm trying to connect and execute statements to Amazon QLDB using Node.js. In order to achieve this, I need to complete the final step which is calculating the commit digest. I have no idea how to do this. I've thoroughly researched the QLDB…
Med
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Data encryption at AWS QLDB

I am currently comparing different solutions for an immutable database, such as Blockchain or AWS QLDB. AWS QLDB looks very interesting for me, but I have a question about how the data is stored at Amazon: Can Amazon see the data, I put on the…
Leslie31
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How does Amazon Managed Blockchain's QLDB handle permissions for the different orgs?

QLDB seems to be this centralized extension built upon the Fabric orderer service that allows you to query a replication of the blockchain network in an SQL-like manner. With the different orgs on the network, I was wondering how QLDB handles…
atkayla
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AWS QLDB multi region support

I am working on QLDB from last 3 months on a single region using it as a leisure database. Now, business wants to move applications in multi-region support. I found many of the AWS services support multi-region like DynamoDB, Secrets Manager. But…
bakshay
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Is there a way to match entries in two AWS QLDB tables if the tables don't have common keys?

I'm building an anonymous polling system using AWS QLDB. I record each vote in a QLDB "votes" table without user's identity and participation info into "participation" table with identity but without answers, because I need to check if a person has…
Slava
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Get qldb ledger table data in javascript object

So my issue is simple yet challenging. I am trying to transfer data from one ledger to another. Now for that, I am reading a whole table of data then creating an object for every document than inserting these documents one by one into the other…
Sulman Azhar
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Transfer all data from one ledger to another in AWS QLDB

I have a QLDB ledger and it's full of tables now. There are a lot of InActive tables and because of these tables, I cannot create more tables because there is a limit of 40 tables per ledger. Now for this, I need to transfer this ledger data to…
Sulman Azhar
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