My question seems to be simple, but I can’t seem to find a valid answer. I have a Hibernate entity which has a ManyToMany association with another entity, which is obtained lazily by default I want
Category: Opensource
Open-source software (open-source) is a new term that is defined as software whose source code can be used by the public, and the use, modification, and distribution of this software are not restricted by licenses. Open source software is usually copyrighted, and its license may contain such restrictions: deliberate protection of its open source status, notice of authorship, or development control. “Open source” is being registered as a certification mark by public interest software organizations, which is also a means of creating a formal definition of open source.
Hadoop (1) Ali Cloud Hadoop Cluster Configuration
Three ECS cloud servers
1.1 Create /bigdata directory
mkdir /bigdata
cd /bigdata
mkdir /app 1.2 Modify the host name node01, node02, node03
1.3 Modify the hosts file
vim /e
NHIBERNATE, MYSQL and GUIDS
I have a view that flattens the hierarchy of 4 tables to display as a report. In the view, it contains the primary key (Guid) of each table and some display data. < p>
The problem is that gui
Hibernate 5.1和Java 8 LocalDateTime
I have switched to Java 8 and Hibernate 5 to overcome the problem of not being able to store milliseconds in Hibernate.
private LocalDateTime date = LocalDateTime.now();
public LocalDateTime
Hadoop SQOOP instance
hadoop sqoop (instance) day-1 sqoop: is an open source tool, mainly used to transfer data between Hadoop and traditional databases (mysql). Import data from a relational database into Hadoop’s HDFS
How to read the ORC file in the Hadoop stream?
I want to read the ORC file in mapreduce on Python. I try to run it:
hadoop jar /usr /lib/hadoop/lib/hadoop-streaming-2.6.0.2.2.6.0-2800.jar
-file /hdfs/price/mymapper.py
-mapper’/usr/local
hibernate – java.lang.ClassNotFoundException：javax.persistence.spi.PersistenceProvider
I am using an application using JPA and Hibernate to try to deploy it on Tomcat 7.
It seems that I did not include all the libraries correctly because I received the following stack error:
S
Hibernate and Ibatis cache
We can use infinispan or ehcache/terracotta to easily use the second-level cache to accelerate hibernate applications, but ibatis only has a simple interface to implement caching. And hibernate kno
Hibernate – @uniqueConstraint Checks multiple tables in JPA
The @OneToMany building on campus has @OneToMany guest rooms.
Room names must be unique on campus
(e.g. campus-A, block-A, room-A and Campus-B, block-A, room-A should be able to store)
Is i
Hive Compression Type Test
Background:
1) 4 different types of tables have been created
2) Clean up the data in the hxh2, hxh3, and hxh4 tables, and keep the data in hxh1. The data size of the hxh1 table is: 74.1