I have this simple query : called from Spring Boot. There are no rows with the ID (150) passed in. When running queryForObject, variable count comes up as 1 , while when running the same query from SQL Developer it comes up as 0!! What’s going on here? What am I missing? Answer Possible causes a) you ar…
Tag: spring-boot
Can somebody help to translate this MySql query to JPQL or HQL?
Don’t forget to check the image below Objects: 1) Question 2) Tags The relationship is ManyToMany The MySql query is following: Need to translate to JPQL or HQL The main goal is to get list of the most frequency tags like:enter image description here Answer Try: The given JPA query is translated to SQL …
Spring Data JPA – Custom Native Query-Methods list prints java.lang.Object
I have created a native custom query method: And calling EntityManager with: But all I get is: when I print out the list. Number of objects is correct so I assume something with casting is not correct. I do get a warning in my IDE: Why is this happening and how do I get the correct list? Answer You can
Spring JPA – Prepared Statement Queries?
I’m building a Spring REST server application and I’m doing some native queries to retrieve data from my database. From the teaching in school, they suggest to make all queries prepared statements, to stop the user entering harmful SQL into the input boxes. I’ve tried to do some research, bu…
How to set large string as param without getting ORA-01460: unimplemented or unreasonable conversion error?
In spring-boot using namedParameterJdbcTemplate (Oracle db version 12 and odbc8 driver 12.2) I am getting the following error while executing a SELECT query bound with a parameter larger than 4000 …
How to execute a native SQL query having INTERVAL clause through Spring Boot JPA?
Not able to execute a native SQL query through Spring Boot Repository layer with JPA in Oracle DB I am trying to write a native SQL query that gets data from a table between the current date and last …
Hibernate Null Attribute Value using Camel-Case
Using Hibernate 5.3, Spring Boot 2.1, MySQL, that runs in Windows 10 OS. What I know I have verified on my phpmyadmin the case of the attributes. And as long the case were the same as the attributes of my Entity class you don’t have to explicitly define the column name in that Entity. And using @Column(…
paging and sorting with Jpa returns only around 10% records from db
When I try to retrieve data from JpaRepository with Pageable request it only return 10% from all records. as example I had 68 records in MySQL database and pageble request only return first 10 records. when i try to get 2nd resultset it returns empty page content object. but if I request 100 records in one re…
Response from query couldn’t map to pojo class spring boot
Every response from query should be mapped to a poja class. I have written a native query @Query(value=”SELECT new QuestionJsonTotalAnswer(q.question) FROM mydb.question q”, nativeQuery=true) List&…
How to improve JPA Query performance and response time on multiple Join tables and conditions
I am very fresh java beginner and I am trying to implement possibility to review documents. User, who belongs to a certain group can review documents of particular types that are assigned to that …