Getting "Lock wait timeout exceeded; try restarting transaction" even though I'm not using a transaction

I'm running the following MySQL UPDATE statement: mysql> update customer set account_import_id = 1; ERROR 1205 (HY000): Lock wait timeout exceeded; try restarting transaction I'm not using a...

E-commerce website design

I'm working on a e-commerce website. This website shall be integrated with a payment- processor. I have the following orders table. orders(InnoDB) ----------------------- id int PRIMARY...

Spring Data JPA - "No Property Found for Type" Exception

Well, I searched Google and found many results, but none of them was able to answer my problem. So, here it goes. I am trying to study Spring MVC and Spring Data JPA by doing a minimal...

JPA, Hibernate, postgreSQL: Unable to build Hibernate SessionFactory

Im trying to do some example app with EJB, JPA-Hibernate. I did a PostgreSQL database like this: CREATE TABLE Klasa ( idKlasa SERIAL, Profil VARCHAR NULL, Skrot VARCHAR NULL, PRIMARY...

Nullable return value on a generic argument

I am trying to save a model to the database using Dapper. I set up the parameters with an input/output parameter that is an int with an existing primary key value used for an update. public async...

trying to find a way to familiarize myself with the structure and content of the database that sits behind a SAP PLM

I am trying to find a way to familiarize myself with the structure and content of the database that sits behind a SAP PLM system via the SAP GUI (no direct access to the database) without the risk...

jboss as 7 Unable to connect to oracle 11.2.0.1.0

I am on jboss as 7 and i defined an oracle datasouce to oracle 11.2.0.1.0 when i use sql developer to connect to this database it works but throuw jboss it's impossible i've got this...

How can I add custom text to Shippo generated labels?

I would like to add a custom field to the shipping label generated by Shippo to identify the physical package. Is there any way to add custom text to the shipment label using the API? I'm...

Flask-SQLAlchemy - how do sessions work with multiple databases?

I'm working on a Flask project and I am using Flask-SQLAlchemy. I need to work with multiple already existing databases. I created the "app" object and the SQLAlchemy one: from flask import...

ActionCable displays an empty page after action

I'm following Michael Hartl tutorial about Rails 5 ActionCable, to build a simple chat, and a problem is occurring inside my create action in MessageController: def create message =...

How can I divide the column in a Pivot table by another column in the same PIVOT table in Excel 2013

I have tried inserting calculated field, but it only gives a count value or a sum. I want to calculate the Average Transaction value which is (Total Sales/No of bills)

How does ConcurrentUpdateSolrClient handle update request?

My application intends to insert documents to Solr regularly. There are two considerations: Sending update request to Solr is key impact to the performance. Thread safe of transaction. The commit...

django.db.utils.NotSupportedError in sqlite why not supported in sqlite

class M_Post(models.Model): '''' CODE '''' class M_File(models.Model): .... CODE .... class M_Post_File(models.Model): post = models.ForeignKey(M_Post,on_delete=models.CASCADE) file =...

Can Firestore update multiple documents matching a condition, using one query?

In other words, I'm trying to figure out what is the Firestore equivalent to this in SQL: UPDATE table SET field = 'foo' WHERE <condition>` Yes, I am asking how to update multiple documents, at...

json: cannot unmarshal string into Go value of type map[string]interface {}

I have been working on converting some crypto pool software over to work with an incompatible coin. I believe I have it all about done. But this error keeps popping up and I just can't seem to...

Dead letter queue (DLQ) for Kafka with spring-kafka

What is the best way to implement Dead letter queue (DLQ) concept in Spring Boot 2.0 application using spring-kafka 2.1.x to have all messages that were failed to be processed by @KafkaListener...

using UART in VHDL

I'm trying to use UART communication with a Lattice machox3 and a ft232R. I am trying to use the VHDL file I found on eewiki(Here). For some reason I am not being able to get tx to work when I...

Bulk update via raw query in typeorm

How can I do bulk update via raw query in typeorm? For example we have model User with property name How can I change names of few users in one transaction? typeorm version: 0.2.7 database: postgress

How to set application name in sequelize connection object?

Summary: I want to change the application name of the connection string when initialize a new sequalize object. based on this stackoverflow question, I set the appName of dialectOptions as...

web3 gives " Error: Returned error: invalid sender" when broadcasting transaction

I am new to web3 and ethereum blockchain. I tried broadcasting a transaction using the following code but it always gives me an invalid sender error.The sample code is shown below. const Tx =...

How to get the precise surrogate key for the incomming fact records

I am building a data warehouse for my company. Recently, I just realized that there are some holes (potentially very dangerous) in my SCD type 2 dimension implementation, so that I have to review...

ProducerFencedException after kafka consumer group rebalancing

I cannot comment on similar topic: https://stackoverflow.com/questions/57504481/transactionid-prefix-for-producer-only-and-read-process-write-producerfencedex so I will ask a new question. Use...

Serializable isolation level - does it block read?

I have read that serializable isolation level blocks only: insert, update, delete but NOT read. I have run in one window: SET TRANSACTION ISOLATION LEVEL SERIALIZABLE; BEGIN TRANSACTION; UPDATE...

Querying a json field in mysql using JOOQ

I have a transaction table and it has a json type field called "request". | Field | Type | Null | Key | Default | | id | bigint | NO | PRI | NULL ...

PoET engine error when setting up Docker Sawtooth Network Environment

I'm trying to set up the Docker Sawtooth Network Environment using PoET Simulator (CFT) following these steps:...

Flink Kafka Sink org.apache.kafka.common.errors.UnsupportedVersionException ERROR

version flink(1.11.3), kafka(2.1.1) My flink datapipeline is kafka(source) -> flink -> kafka(sink). When I submit job first, it works well. but after jobmanager or taskmanagers fail, if they...

Transactional outbox pattern vs ChainedKafkaTransactionManager in Microservices

Using Spring-Kafkas ChainedKafkaTransactionManager I cannot see any point in implementing the transactional outbox pattern in a Spring Boot microservices context. Putting message producer (i.e....

How to use PagingSource and Room with fields annotated by Embedded

I want to use Paging 3 Library for pagination with db as SSO and I have some data classes which use Embedded annotation (one to many, relation) sample ↓ data class PojoEmbended( @Embedded ...

Why can't persist data into database

I am getting: Can not set java.lang.Integer field com.springboot.Model.departmentModel.id to com.springboot.Model.departmentModel in my Spring Boot Project trying to persist data into...

Setting up a linked server on a Managed SQL Instance

On an Azure Managed SQL Instance that has been setup, I'm trying to setup some linked server connections. When I access these same databases through Management Studio while logged into this MI SQL...