hibernate automatically generates the sql statement for us. You can see if there is any way to directly return and get the stitched sql? by printing the log.
hibernate automatically generates the sql statement for us. You can see if there is any way to directly return and get the stitched sql? by printing the log.
https: github.com thymeleaf . I use jpa, to cascade the two classes through annotations. in the html page, when you get the object of any class through the thymeleaf tag, it will appear . java.lang.StackOverflowError: null at sun.reflect.misc.Refl...
Spring boot uses jpa to operate MySQL InnoDB; for example: products; id; quantity; ; id=3211: I see the sql statement on the Internet is: SET AUTOCOMMIT=0; BEGIN WORK; SELECT quantity FROM products WHERE id=3 FOR UPDATE; UPDATE products SET quan...
Code package com.spring.controller; import java.util.List; import org.springframework.data.jpa.repository.Query; import org.springframework.data.repository.CrudRepository; import org.springframework.stereotype.Repository; @Repository public inte...
for example, class table (class_id primary key, class_code is unique) class_id,class_code,class_name student table (stu_id primary key, class_code is the class_code of class table) stu_id,stu_code,stu_name,class_code the class_code of the student ...
when I integrate jpa with springboot, I have a custom query that does not match the actual execution result of mysql. Custom query is as follows: @Query("select o from MyOrder o where o.phoneNum=?1 and o.ostart>=?2") List<MyOrder> f...
query conditions are composed of String and List, such as: (List < String > id, String location, String status,.) The exact number of fields in the parameter is not certain. There may be more than one . how to implement this situation? you d better ...
mysql is @ Column (name = "name ", columnDefinition = "varchar (100) comment comment ) what does postgresql do? ...
I use the save method to save the object and get the object returned by the save method. The data of the joined object is empty when I save, I set the id of the associated beComment I thought I could return the beComment data completely when I re...
after adding spring-boot-starter-data-jpa to your springboot project, when you unit test your repository with junit. There will be a lot of when starting the container through junit test case. The error of [Xlint:cantFindType] [AppClassLoader@xxxx] e...