I am using Python to insert value in a database through an API written by someone else in Java. The insertion goes quite slow, and when I look at the mysql log of the transcactions for one insert I see that it often does select @@session.tx_read_only: From http://docs.oracle.com/cd/E17952_01/refman-5.6-en/server-system-variables.html#sysvar_tx_read_only I guess it’s being used so that there is not writing and
Tag: mysql
Hibernate : self join confusion?
I have a category table.In which first 5 are main category and others are sub category. I need to fetch the sub categories of first 5 main category so i have found the sql query The query is joining the same table itself.and am getting the result given below Result How can i convert the SQL query to HQL and
Unable to local MySQL database with Spring app deployed through Tomcat
I’m trying to create a web application using Spring and Hibernate, deploying it through Tomcat 8. I’ve setup MySQL and Tomcat 8 locally on my machine, and am able to deploy the web application to it. …
Use JDBC/Mysql Connector in intellij idea
I’m new in Java, and I need to establish a connection to a MySQL server (local), I have add the libraries in Intellij idea but it seems not work, the IDE can’t find the class i think… I become crazy I’m searching since two hours… I come from visual studio/c# dev environment and i think that i should miss something…
JPA @Column annotation to create comment/description
I was wondering is it possible to create from jpa/hibernate annotation a database column description/comment like this: ALTER TABLE tablename CHANGE status status INT(11) NOT NULL COMMENT ‘sample description/comment’; It will be great functionality, but I cant find anything about this in JPA specification. Maybe I should use @Column(columnDefinition=””) property, but I dont have any clue. Please help Answer I
Spring boot JPA insert in TABLE with uppercase name with Hibernate
i have a table entity mapped as : When i try to insert new record in database, the table name was translated in lowercase as : items_to_register , but my table name is ITEMS_TO_REGISTER How can i fix my problem without change MySql configuration? (my.cnf) I have in my application.properties file : Answer On hibernate 5, it would be in
No Dialect mapping for JDBC type: 1111
I’m working on a Spring JPA Application, using MySQL as database. I ensured that all spring-jpa libraries, hibernate and mysql-connector-java is loaded. I’m running a mysql 5 instance. Here is a excerpt of my application.properties file: When executing an integration test, spring startsup properly but fails on creating the hibernate SessionFactory, with the exception: I think my dialects should be
Spring boot not executing schema.sql script
I’m developing a Spring Boot web application and want to create a MySql database if it’s not already created. So I’ve done a dump of my current database in order to have an empty schema of it. Put it in /src/main/resources, so maven brings it to /WEB-INF/classes when building the war file. That’s how my application.properties is configured (according to
MySQL to Hibernate datatype mapping for type “YEAR”
There’s a column in our database which needs to be of type YEAR. What is the corresponding Hibernate mapping for the entity? Tried searching all over, but unable to find the details. I am not sure if I need to use anything from @Temporal or any other specific type. We are using Hibernate ORM v4.1.7. Answer You can write a
Returning ResultSet without close?
I would like to have a database connection managing class which I can use for simple SQL commands like SELECT, INSERT etc. by simple calling something like this (class below): This is class I’ve found on web: Is this way of returning ResultSet without closing it (and closing the statement) right? How can I return the ResultSet from the method?