I came across a blog of using UUID with Hibernate and MySql. Now the problem is, whenever I take a look at the database the ID’s will be non-readable format (binary-16). How can I store UUID as a readable format like 7feb24af-fc38-44de-bc38-04defc3804fe instead of ¡7ôáßEN¹º}ÅÑs I was using this code And…
Tag: mysql
java.sql.SQLException: Unknown system variable ‘query_cache_size’
I have a app running with JDBC and get data from MySQL, but I can’t build it because of this error : I have file application.properties here Mysql workbench is 8.0 version Answer query_cache_size was removed in MySQL 8. Check the docs. It works with JDBC driver 5.1.44.
Debezium flush timeout and OutOfMemoryError errors with MySQL
Using Debezium 0.7 to read from MySQL but getting flush timeout and OutOfMemoryError errors in the initial snapshot phase. Looking at the logs below it seems like the connector is trying to write too many messages in one go: Wonder what the correct settings are http://debezium.io/docs/connectors/mysql/#connec…
Need to insert 100000 rows in mysql using hibernate in under 5 seconds
I am trying to insert 100,000 rows in a MYSQL table under 5 seconds using Hibernate(JPA). I have tried every trick hibernate offers and still can not do better than 35 seconds. 1st optimisation : I started with IDENTITY sequence generator which was resulting in 60 seconds to insert. I later abandoned the sequ…
Spring data JPA: how to enable cascading delete without a reference to the child in the parent?
Maybe this is an overly simple question, but I am getting an exception when I try to delete a user entity. The user entity: And I have an entity class which references a user with a foreign key. What I want to happen is that when the user is deleted, any PasswordResetToken objects that reference the user are …
How to create a generic DAO for CRUD methods
I’m trying to create a generic DAO for the basic CRUD methods so that I can reuse the code, but I really have no clue how to start. I already have a DAO for every class, and they work perfectly. I read lots of tutorial, and downloaded projects, but I can’t adapt (or understand) it to my program. H…
OpenGTS Integration in Eclipse
OpenGTS Integration in Eclipse *Imported whole opengts code in to the eclispse workspace. *Created the four environment variables like GTS_HOME,CATALINA_HOME,ANT_HOME,JAVA_HOME as system variables. *In the next step am trying to configure the database for the opengts as they mentioned in the document. *Refer …
Android Volley: select data from MySQL database by id specified by user
I’m writing a simple Android application using Volley. I’d like to know how to select a first name and a last name from MySQL database by ID, which user enter into editText in application. This is my PHP script: If I specified the ID in the code, it returns a data in JSON, which I demand, so the s…
One-to-many select in Jooq
I am trying out JOOQ and trying to select from 3 tables (Author, Books and Articles) using a join statement. The ERD is as follows: The query I have is the following: I also have a protobuf object as follows: (or any other pojo for that matter) which will hold all the entities (author details + list of books …
compare java fx date picker date to sql date inside a query
I want to know how I can compare a mysql date to a java fx date picker date. So if I have a datepicker date in MM/DD/YYYY format and a mysql date in YYYY/MM/DD format how do I compare those two inside a query? Answer I prepared for you small appliaction how to convert Date to LocalDate and set in