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Tag Archives: MySQL

SQL to NoSQL : Copy your data from MySQL to Couchbase


Introduction During my last interactions with the Couchbase community, I had the question how can I easily import my data from my current database into Couchbase. And my answer was always the same: Take an ETL such as Talend to do it Just write a small program to copy the data from your RDBMS to Couchbase… So I have written ...

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Spring JPA Data + Hibernate + MySQL + Maven


Development of web-applications with the help of Spring MVC implies creation of several logical layers of architecture. One of the layers is a DAO (Repository) layer. It is responsible for communication with a database. If you developed the DAO layer at least once, you should know that it involves a lot of boilerplate code. A Spring Data take a part ...

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Spring MVC: Security with MySQL and Hibernate


Spring has a lot of different modules. All of them are useful for the concrete purposes. Today I’m going to talk about Spring Security. This module provides flexible approach to manage permitions for access to different parts of web-application. In the post I’ll examine integration of Spring MVC, Hibernate, MySQL with Spring Security. A regular case for any web-application is ...

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Caveats With MySQL Pagination


We’ve all done pagination – it’s sensible for both lists in the UI and for processing data in batches. “SELECT (columns) FROM table LIMIT X, Y”. Possibly “SELECT (columns) FROM table ORDER BY some_column LIMIT X, Y”. What’s the caveat? Especially when working with an ORM and when processing batches, where order doesn’t matter, you are likely to omit the ...

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MySql connections autodrop after a certain hours


MySql is configured to drop any connection which has been Idle for more than 8 hours. What is the implication of this? After you return to your deployed app after a gap of 8 hours (If default SQL parameters have not been changed), you will be greeted with an exception. How to solve this issue? Increase the wait_time parameter -Not ...

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Getting started with Quartz Scheduler on MySQL database


Here are some simple steps to get you fully started with Quartz Scheduler on MySQL database using Groovy. The script below will allow you to quickly experiment different Quartz configuration settings using an external file.                   First step is to setup the database with tables. Assuming you already have installed MySQL and ...

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Debugging SQL query in MySQL


Recently I started writing SQL query for analyzing and debugging the production code. But I was surprised to see that some queries takes longer time to execute to achieve the same output. I did research and found some interesting stuff about how to debug the SQL query. I have a very simple table who’s definition is as following. In test ...

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Load or Save Image using Hibernate – MySQL


This tutorial will walk you throughout how to save and load an image from database (MySQL) using Hibernate. Requirements For this sampel project, we are going to use: Eclipse IDE (you can use your favorite IDE); MySQL(you can use any other database, make sure to change the column type if required); Hibernate jars and dependencies (you can download the sample ...

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