Jpa Distinct Query

I'm also impressed by the complexity of query you can write using Spring Data. But when developer uses Spring Data JPA, they can execute query by creating methods with the use of method name convention. jpa 原生insert的sql语句:. Filtering your entities Introduction. MongoDB distinct. The JPA query hint is a Java Persistence provider customization option. The Java Persistence query language is a typed language, and every expression has a type. Using named queries to declare queries for entities is a valid approach and works fine for a small number of queries. We can also use Distinct, First, or Top to remove duplicates or limit our result set: List findTop3ByAge() The criteria part contains the entity-specific condition expressions of the query. 0에서 규약이 그렇게 정의되어 버렸기 때문에 그렇다고하니 신경쓰지 않아도 된다. Now I have it the way I mentioned and it brings only color"red". You'll find sqlplus to be "not the tool you want to use", it is a very generic command line reporting tool. Overview of the JPA (Java Persistence API) Introducing the Auction Application Java Persistence API Entities Understanding the Entity Manager Modeling Entity Relationships Entity Inheritance and Object-Relational Mapping Persisting Enums and Collections Introduction to Querying Using the JPA Query Language Using the JPA Criteria API Advanced. The following code is from Phone. Sometimes we may need to limit the result returned by query. But it won’t affect the database directly. 8, Spring data project includes an interesting feature - through a simple API call developer can request database query results to be returned as Java 8 stream. This allows typed static variables to be used in the Criteria API. If we want to select unique results, we need to add Distinct; Now we can use plenty of CRUD operations provided by Spring Data JPA and creating database queries using method names and @Query Annotation. zip (예제소스파일/ jpql package참조) JPQL은 가장 중요한 객체지향 쿼리 언어이다. Micronaut Data is a database access toolkit that uses Ahead of Time (AoT) compilation to pre-compute queries for repository interfaces that are then executed by a thin, lightweight runtime layer. This query can be answered in several different ways. The Java Persistence Query Language (JPQL) is a platform-independent object-oriented query language defined as part of the Java Persistence API (JPA) specification. The orderBy dynamic path generation was introduced in #582 and it works as expected with regular JPA Queries, e. The solution to a similar query problem is shown here in SQL but I want to do it using JPA Criteria Query. Hibernate Beginner Thoughts On Java; How to call native SQL queries with JPA and Hibernate Apply DISTINCT to Your JPQL But Not Your SQL Query by Thoughts On Java. It is used to create queries against entities to store in a relational database. SELECT FROM table_name WHERE DATE_FIELD between '2015-03-01' and LAST_DAY('2016-02-01'). CrudRepository provides generic CRUD operation on a repository for a specific type. Database Size Growth 04/19/2017. Every valid criteria API expression can be used as selection, because all the criteria API expressions are represented by a sub interface of Selection - Expression javax. JPA - Java Persistence Query Language (JPQL) - PART II March 21, 2014 by Amr Mohammed Leave a Comment This tutorial is a complement for Java Persistence Query Language (JPQL) Part I , in which a new techniques of querying should be discovered and learned. Specify whether duplicate query results will be eliminated. This article is an extension of the previous article to learn how to use the @Query annotation to define JPQL (Java Persistence Query Language) and native queries in Spring Data JPA. Hi, As requested, I open a new issue. 반환타입을 줘도 TypedQuery가 아닌 Query를 반환하는 이유는, JPA 1. litter where m. Custom object “scopes”, which typically interact with a store outside the control of the container. directs) p"); Example. 0 Criteria, and i need to distinct my root entities. Spring Data JPA - Repository 15. tasks t "+ "where t. The JPA L2 cache is designed for Entities. Query creation from method names. JPA Relationships: Lazy Loading. (For our purposes, a single query also includes a call to a stored program (stored routine, trigger, or event. These expressions are the primary difference between the Java Persistence query language and SQL. SQL と同じように DISTINCT が使える。 DISTINCT の対象に組み込み可能オブジェクトを指定することはできないっぽい? The result of DISTINCT over embeddable objects or map entry results is undefined. So, you can use them to create a test database and tables. it can only be lazily loaded whilst within a transaction. @vlad_mihalcea vladmihalcea. peoples' Stuff is one to many to Things. JPQL은 테이블을 대상으로. JPA uses JPQL (Java Persistence Query Language) as an interface (unified query language) to relieve the programmer about knowing various data-base dialects. Join query returns a list of arrays of Objects which are aggregate of columns of the joined tables. The query language allows you to write portable queries that work regardless of the underlying data store. Indicates that this Query’s statement accessor should return a SELECT statement that applies labels to all columns in the form _; this is commonly used to disambiguate columns from multiple tables which have the same name. JPQL is similar to SQL, but operates on objects, attributes and relationships instead of tables and columns. activityID, colofassig6_. Spring Data JPA Tutorial: Introduction to Query Methods describes how you can pass method parameters to your query methods and identifies the "legal" return values of Spring Data JPA query methods. This course will introduce the framework, demonstrate how to install it, and spend some time working with some real world examples. Para facilitar a criação de DAO's que acessam bancos relacionais e inclusive outros tipos de bancos, o…. Expression JPA interface Type for query expressions. SELECT DISTINCT a. The Java Persistence Query Language (JPQL) is the query language defined by JPA. Agenda JPA Overview Annotating Persistent Entities Understanding the EntityManager JPQL and the Query Interface Spring and JPA Demo. The data types of the corresponding columns or expressions of the row-value-expressions must be compatible. You can vote up the examples you like. Let us say we want records from March 2015 to Feb 2016. seleccionado FROM AreaCoberturaSedes acs JOIN acs. Find answers to SELECT DISTINCT on one column, with multiple columns returned, ms access query from the expert community at Experts Exchange. Это несколько интерфейсов которые используют JPA Entity для взаимодействия с ней. The Java Persistence Query Language (JPQL) is a platform-independent object-oriented query language defined as part of the Java Persistence API (JPA) specification. albums") Dynamic Query. Java Spring - Limiting Query Result with Spring Data JPA. Spring Data JPA removes much boilerplate from repository code and QueryDSL can be used to create clean and reusable query specifications. This is usually a good thing as it’s more efficient. In strict JPA the entity name cannot be a MappedSuperclass entity name. Queries and SQL Injection Attacks Queries with Parameters Prevent SQL Injection Attacks They are precompiled on DB server, too, what is good for repeatedly executed queries (better performance) JPA Queries 8. These old forums are deprecated now and set to read-only. Interface hierarchy of query expressions. JPQL can retrieve information or data using SELECT clause, can do. name = 'Bob'". employees e WHERE p. Querydsl for SQL provides a typesafe view of the relational schema and makes expressing database queries in Java as intuitive as possible. Other approaches before JPA focused on queries and how to translate results from queries to objects. client) – it produces nice join and returns only distinct Clients. Functions are another powerful feature of JPQL that you probably know from SQL. After the basic CRUD functionalities are implemented for an entity, there is a very common request to create various filters for the attributes of the entity, so the server could be used more effectively. Streaming MySQL Results Using Java 8 Streams and Spring Data JPA 19 October 2015 | Krešimir Nesek Since version 1. persistence. ID_EMAIL_IN WHERE email0_. A new feature is provided in JPA 2. If the type of the criteria query is CriteriaQuery for some user-defined class X (i. 1 implementation. name IN ('Documentation', 'Refactoring') Multiple values with AND conditions. 0 has been released on the VS Code Marketplace to start off the new year. Solving practice questions is the fastest way to learn any subject. Clash Royale CLAN TAG#URR8PPP Spring Data JPA Query method duplicates objects. List l = em. JPQL can retrieve information or data using SELECT clause, can do. Query : The javax. In this article, we will focus on how to generate a query using method name strategy. 0에서 규약이 그렇게 정의되어 버렸기 때문에 그렇다고하니 신경쓰지 않아도 된다. orderBy(player. Query Creation from Method Name. And you can do the same with the CriteriaUpdate and CriteriaDelete statements introduced in JPA 2. JPA backs it up too: The DISTINCT keyword is used to specify that duplicate values must be eliminated from the query result. supervisor is NULL"); List resultList = query. Summary JPA is not component technology : programmers must create new entity objects with the help of operator new JPA providesAPI (EntityManager) for persistent data management For CRUD operations there is no need to write SQL statements But for other operations (simple queries) we can write JPA QL statements JPA is not meant for complex queries (aka business. This is useful since it allows you to customize the data that is retrieved with a query or find operation. persistence. It is used to create queries against entities to store in a relational database. A true value will cause duplicates to be eliminated. Entity graphs have attributes that correspond to the fields that will be eagerly fetched during a find or query operation. Learn how to take advantage of the Java Persistence query language and native SQL when querying over JPA entities. This comment has been minimized. The easiest way to set this hint is to use the constant defined in Hibernate’s org. Obviously you may find an implementation that will allow an. JPA / Hibernate Many to Many Mapping Example with Spring Boot Rajeev Singh • Spring Boot • Nov 24, 2017 • 6 mins read In this article, You'll learn how to map a many-to-many database relationship at the object level in your application using JPA and Hibernate. This means that multiple references to a function such as NOW() within a single query always produce the same result. Querydsl for SQL provides a typesafe view of the relational schema and makes expressing database queries in Java as intuitive as possible. RESPONSE_MANDATORY = true AND emailso1_. The HQL query in this example uses implicit association joining (i. Durante este artículo vamos a centrarnos en el lenguaje de consulta JPQL (Java Persistence Query Language), que permite acceder de forma rápida y sencilla a los datos que almacenamos a través de JPA. Hi I need to do an UPDATE with the following JPQL. CrudRepository is a Spring data interface and to use it we need to create our interface by extending CrudRepository. To visualize this behavior, consider the following JPQL query:. A new feature is provided in JPA 2. id IN (1) ) For some classes of queries the query can be rewritten to yield the same effect by putting the subquery in the WHERE clause, which is supported by JPA:. What column does DISTINCT work with in JPA and is it possible to change it? Here's an example JPA query using DISTINCT: select DISTINCT c from Customer c Which doesn't make a lot of sense - what column is the distinct based on? Is it specified on the Entity as an annotation because I couldn't find one?. July 28, 2018 Java Leave a comment. 8, Spring data project includes an interesting feature - through a simple API call developer can request database query results to be returned as Java 8 stream. I have a Insert query which select results from a SQL involve multiple joins. Method Summary JPQLQuery: fetch() Add the "fetch" flag to the last defined join JPQLQuery: fetchAll() Add the "fetch all properties" flag to the last defined join. avec quelle colonne est-il possible de travailler séparément dans JPA et est-il possible de la changer? voici un exemple de requête JPA utilisant DISTINCT: select DISTINCT c from Customer c ce qui n'a pas beaucoup de sens - sur quelle colonne se base le distinct?. Now you can call query. GraphQL provides a complete and understandable description of the data in your API, gives clients the power to ask for exactly what they need and nothing more, makes it easier to evolve APIs over time, and enables powerful developer tools. name = 'proj'"). So since JPA will implicitly to an inner join, when would we need to be explicit? Firstly, JPA creates an implicit inner join only when we specify a path expression. EntityManager のfindメソッドを使わずにQueryを発行してEntityを検索すると、検索処理を行う前に、 EntityManager 内部の処理でflushメソッドと同等の処理が実行され、蓄積されていたEntityへの操作がリレーショナルデータベースに反映される仕組みになっている。. If you want to achieve better performace add the following method to your Spring Data JPA repository interface:. This creates a JPA TypedQuery object for the DAO entity. 2, you can prevent Hibernate from adding the DISTINCT keyword to the SQL statement by setting the query hint hibernate. Query createNativeQuery(String sqlString, Class resultClass) 를 말한다. Pessimistic locking results in database records being locked by some process until the unit of work is completed so no other process is able to interfere with the locked records until the work is. If you are new to Spring MVC or Spring Data JPA, it would be best to work your way through below before. There may be cases where we do not want an entire entity from the query method. And we created a column family 'userColumnFamily' and we inserted few data into it. The Data module requires a JPA implementation to be available in the Java environment where your projects are deployed. negociacion. xml 文件中。 @Query 注解中,如果用到 ?的形式获取参数。. JPQL supports this operator as well. The api allows programmers to write sql queries in code that are type safe and access the resulting rows in a type safe manner. cardNumber, a. When the predicate is evaluated, the value of. directs) p"); Example. Hello Tom, I am using the query below [1] to search the table and get the first unique N result within milliseconds, but the execution will execute the DISTINCT after getting the first N result which will reduce the rows to be less than N rows which means incomplete result. There may be cases where we do not want an entire entity from the query method. getResultList(); which will return a list containing arrays representing the data for. JPA Criteria API - Distinct clause in Criteria API [Updated: Aug 13, 2018, Created: Aug 13, 2018] Previous Page Next Page. The jpa-criteria module is an implementation of the JPA Criteria API based on the query builder of the core module. Indicates that this Query’s statement accessor should return a SELECT statement that applies labels to all columns in the form _; this is commonly used to disambiguate columns from multiple tables which have the same name. History to analyze the growth of the databases size over a given period. Below is the example of limiting query result to 20 (the second argument). In this article, we will focus on how to generate a query using method name strategy. 1 is the ability to specify fetch plans using Entity Graphs. spring data jpa native query join (5) I know I can pass a list to named query in JPA, but how about NamedNativeQuery? I have tried many ways but still can't just pass the list to a NamedNativeQuery. But you can simply use an inner join to apply your restriction, and another fetch join to load the cities: select distinct r from Route r inner join r. Querydsl is a framework that enables the construction of statically typed SQL-like queries through its fluent API. Whenever I join an entity more times in a query I always go for created aliases. JPA and Hibernate - Criteria vs. For example, the following JPQL query: SELECT DISTINCT c. JPA Overview. JPQL or HQL [+293] [21] cretzel Criteria api provide one distinct feature that Neither SQL or HQL provides. However, I see that the DISTINCT is applied on the SQL statement as well. For efficient execution, the ranking must be done with a pipelined order by. Java API for JSON Processing Tutorials Using Query public class ExampleMain { private static EntityManagerFactory. But when developer uses Spring Data JPA, they can execute query by creating methods with the use of method name convention. In our examples, I’m going to show you how to create a query with hibernate that will group your data in some manner. The Java Persistence API provides distinct types of locking mechanisms that may be classified in a couple of major groups: pessimistic and optimistic. They tell JPA how to fetch your entities. Functions are another powerful feature of JPQL that you probably know from SQL. My favourite Spring Data JPA feature is top and first, which returns the first or top records from a table. size" that allows the size to be set. A query for persistent Java objects is typesafe if a compiler can verify it for syntactic correctness. Spring Data JPA - Classes for Query 11. Let us say we want records from March 2015 to Feb 2016. A true value will cause duplicates to be eliminated. Filtering your entities Introduction. Hola! No entiendo muy bien de que va tu articulo. net api that simplifies the task of querying databases. 0 the only way to query the database is to use EJB QL(EJB Query Language) later on with the introduction of JavaEE 5. If you’re executing a query and finding that you have a bunch of duplicate records and haven’t a clue why, then you’re in the right place. Here is my JPA query : Here is the result of this query : SELECT DISTINCT email0_. Query createNativeQuery(String sqlString, Class resultClass) 를 말한다. Problem is I would like to get the distinct values of a map by restricting the search by key. The data types of the corresponding columns or expressions of the row-value-expressions must be compatible. A UNION query unless told otherwise, will fetch only unique values. DISTINCT requires a UNION which is not supported for Clobs in Oracle 10g. This creates a JPA TypedQuery object for the DAO entity. In this article, We will learn Spring JPA Like Query Example, While working with contains criteria like the query are used, for example when we want to search for specific terms inside the column value at that time like query is used. springframework. Why would you expect to get others? I want to search for ALL the favourite objects that CONTAIN the color red. It helps simplify your codebase, and frees me up from writing JPAQL or SQL. You can either use the method name to derive a query directly or manually define your own JPQL/native query using the @Query annotation. (Set보다는 List가 더 적합하다고 판단되신다면) 이 부분은 @Query에서 적용하는 것이니 join fetch, @EntityGraph 모두 동일합니다. In this chapter we are retrieving the same piece of data we inserted there by running a CQL select query from our Java application. JPQL supports this operator as well. I'm actually using the JPA criteria API to do this. Query : The javax. RESPONSE_TYPE <> 'response. Once we have code for accessing the database, we wrap the entity classes into a module, together with modules for the related JPA JARS. This will return the single Object. 3 comes with efficient query builders based on JPA Criteria API that aims at solving many issues that are listed above but is blocked by compile time dependency as this is JPA based solution so the entity manager must be aware of all possible types used in queries. We may be interested only in few attributes of that entity or subset of that entity with some manipulation in it. The reason a hierarchy is needed can be understood by trying out the following query with only a “Cat” entity: select distinct m from Molly m left join fetch m. This query can be answered in several different ways. activityID, colofassig6_. First we create a Embeddable entity by marking the class with @Embeddable annotation. A Simple Query with Relationships SELECT DISTINCT p FROM Player p, IN(p. We are waiting for you on our new forums!. It defines two repositories, JpaPersonRepository and MongoDBPersonRepository. We are waiting for you on our new forums!. Vlad Mihalcea. InvalidJpaQueryMethodException: Cannot use native queries with dynamic sorting and/or pagination in method 然后上网搜索了下异常, 解决方案是 添加 #pageable 或 /n#pageable/n ,工程可以正常启动,但运行到该处时,报出另外一个数据库异常:. peoples' Stuff is one to many to Things. Domain changes are directly reflected in queries and autocomplete in query construction makes query construction faster and safer. In the query language, an expression can traverse, or navigate, to related entities. fullname from Article ar join ar. The derived query method mechanism built into the Spring Data repository and useful for building constraining. JPA provides named queries which are statically defined queries with an unmodifiable query string. As always, the complete code examples used in this tutorial are available over on Github. Also, we learned how to implement a custom repository and create a dynamic query. I am having trouble figuring out how to identify duplicates in a table (where lastName and firstName are equal). Durante este artículo vamos a centrarnos en el lenguaje de consulta JPQL (Java Persistence Query Language), que permite acceder de forma rápida y sencilla a los datos que almacenamos a través de JPA. schoolUrl=?1 and a. If you already know about Spring Data JPA, you must be knowing that all the query methods of Repository classes will return an entity object. Query interface. JPA Tutorial - JPA Embeddable Example « Previous; Next » The following sections demonstrate how to embed an entity into another entity. We have cities where certain people live in. This creates a JPA TypedQuery object for the DAO entity. 0 the only way to query the database is to use EJB QL(EJB Query Language) later on with the introduction of JavaEE 5. Querydsl is a framework that enables the construction of statically typed SQL-like queries through its fluent API. FINE: SELECT DISTINCT t1. lastName FROM Author a Functions. Now, let's go through various concrete examples. persistence. Let us say we want records from March 2015 to Feb 2016. I don’t have to concern myself with how the data is coded once it is imported into the database. MongoDB distinct. JPA backs it up too: The DISTINCT keyword is used to specify that duplicate values must be eliminated from the query result. When the predicate IS NOT DISTINCT FROM, the result of the predicate is true if all pairs of corresponding value expressions evaluate to true (null values are considered equal to null values). This article describes how to write dynamic, typesafe. Your query clearly states WHERE cl. count by using sql native: Here is simple SQL query to count the number of employees in the employee table. Sorry I am not following you. You also cannot specify DISTINCT if the SELECT list contains LOB columns. I like Spring Data JPA. I changed my queries so that I don't need to use DISTINCT any more. ID AS a1, t1. ALPHA1 as the level-2 query cache provider, I am worried that, contrary to the Hibernate documentation, database results are being stored multiple times in distinct memory locations (for different HQL queries' resultsets that return some of the same records) within the infinispan namedCache, "local-query". In this article, we will learn how we can create query methods by using the query generation from the method name strategy. GraphQL is a query language for APIs and a runtime for fulfilling those queries with your existing data. Spring Data JPA provides three different approaches for creating custom queries with query methods. Since distinct is not added in the count statement, the count is not distinct and the total number of results is not the right one Possible Fix: in JpaCountQueryCreator, the complete method always calls query. 0 has been released on the VS Code Marketplace to start off the new year. The following are Jave code examples for showing how to use distinct() of the javax. SQL COUNT() with DISTINCT: SQL COUNT() function with DISTINCT clause eliminates the repetitive appearance of a same data. These expressions are the primary difference between the Java Persistence query language and SQL. You have to use distinct() before the list() of the second query. My task is to come up with a query that produces the last activity for each CategoryId in the table. Environment: Spring Boot, JPA(Hibernate), H2 database. Overview of the JPA (Java Persistence API) Introducing the Auction Application Java Persistence API Entities Understanding the Entity Manager Modeling Entity Relationships Entity Inheritance and Object-Relational Mapping Persisting Enums and Collections Introduction to Querying Using the JPA Query Language Using the JPA Criteria API Advanced. The query language uses the abstract persistence schemas of entities, including their relationships, for its data model and defines operators and. Querying with JPA. The select results multiple records, but I want to filter on a SINGLE Column - Distinct. JPQL JPQL(Java Persistence Query Language)은 JPA를 구현한 프레임워크에서 사용하는 언어입니다. name) c from Customer c 我使用mySQL和Hibernate. Apache Hive is an open source project run by volunteers at the Apache Software Foundation. phones p WHERE p IN ('333-333-333', '444-444-444') For @ManyToMany relation: SELECT DISTINCT e FROM Employee e JOIN e. JPQL 직접 정의. from(player). This article is an extension of the previous article to learn how to use the @Query annotation to define JPQL (Java Persistence Query Language) and native queries in Spring Data JPA. The Java Persistence Query Language (JPQL) is a platform-independent object-oriented query language defined as part of the Java Persistence API (JPA) specification. xml 文件中。 @Query 注解中,如果用到 ?的形式获取参数。. createQuery( "SELECT DISTINCT e. This tutorial will walk you through the process of creating a Registration and Login Example with Spring MVC, Spring Security, Spring Data JPA, Hibernate, MySQL, JSP and Bootstrap. This feature is only available if you are using a JPA 2. Distinct here has a special meaning that is used by JPA specification. persistence. Executing this fake query causes the * query parser to be initialized before any other queries can execute. Query ini melibatkan tiga objek, yaitu Author, Article, dan Category. jBPM in version 6. Spring Data JPA - Classes for Query 10. Spring Data JPA offers various ways to create a query. setResultTransformer(Criteria. please suggest me what i done the mistake,this is my method. JPA provides named queries which are statically defined queries with an unmodifiable query string. 2, you can prevent Hibernate from adding the DISTINCT keyword to the SQL statement by setting the query hint hibernate. list(QClient. For example left joins, unions, nested queries, temp tables, custom tsql, insert selects. The DISTINCT keyword has a different purpose when it comes to entity queries. Filtering your entities Introduction. I'm sure you can easily transform it mentally to Criteria or JPQL - Querydsl produces JPQL, BTW. JPQL can be used for reading ( SELECT ), as well as bulk updates ( UPDATE ) and deletes ( DELETE ). And you can do the same with the CriteriaUpdate and CriteriaDelete statements introduced in JPA 2. This is how one can model this with JPA. springframework. According to the JPA 1. Replaces the previously specified selection(s), if any. The Java Persistence query language is a typed language, and every expression has a type. These old forums are deprecated now and set to read-only. Since Hibernate 5. This is supported through JPQL, but not SQL, so you could use JPQL instead of a native query. 3 comes with efficient query builders based on JPA Criteria API that aims at solving many issues that are listed above but is blocked by compile time dependency as this is JPA based solution so the entity manager must be aware of all possible types used in queries. list(player); generates proper JPQL select player from Player player lef. History to analyze the growth of the databases size over a given period. The number of elements that are returned by the row-value-expression that specified after the distinct operator must match the number of elements that are returned by the row-value-expression that is specified prior to the distinct operator. Spring Data JPA - Repository 16. Spring Data JPA offers various ways to create a query. I then took the list of strings to query for the associated name for that MTFCC. Java Code Examples for javax. Derived queries are good as long as they are not complex. When join a collection, we must use "join" keyword and also make sure to use select clause. I have initialized the database with 5 authors and 25 books; and assigned 5 books to each author. currency FROM Country c can be built as a criteria query as follows:. albums") Dynamic Query. The type of an expression is derived from the structure of the expression, the abstract schema types of the identification variable declarations, the types to which the persistent fields and relationships evaluate, and the types of literals. Hola! No entiendo muy bien de que va tu articulo. Micronaut Data is a database access toolkit that uses Ahead of Time (AoT) compilation to pre-compute queries for repository interfaces that are then executed by a thin, lightweight runtime layer. For example, the following JPQL query: SELECT DISTINCT c. Query 中。大家可以到这里看它的具体的解释。从官方的文档中,我看到,JPA 其实首推的是 @NamedQuery 或者是将查询语句定义在 orm. If that's still not enough, for example, sometimes we need to do things that are not supported by Spring Data JPA. The first part of this post explains what is this select n+1 anti-pattern. We are pleased to announce that SpringFuse now leverages Spring Data JPA in the code it generates. My query is as follows: SELECT DISTINCT p FROM UserProfile p ORDER BY :order When I execute the query, I'll pass in a value like "lastLoginDate" for :order. and sets it as the SELECT clause content (overriding previously set SELECT content if any). 0 for the following line? criteria. Spring Data JPA provides three different approaches for creating custom queries with query methods. children c left join fetch c. Expression JPA interface Type for query expressions. client) - it produces nice join and returns only distinct Clients. You might need to give more details of what you mean by all related colors. In the javadoc there is no clear specification of what to use. This is because JPA defaults to a single table hierarchy strategy. Spring Data repository query building mechanism allows quick query definition by method names & custom-tuning of it by introducing declared queries as needed. One is intended for JPA and the other for MongoDB usage. @vlad_mihalcea vladmihalcea. The easiest way to set this hint is to use the constant defined in Hibernate's org.