ObjectiveSql

Writing SQL using Java syntax

Programming language: Java

License: Apache License 2.0

Tags: ORM     Projects    

README

ObjectiveSQL is an ORM framework in Java based on ActiveRecord pattern, which encourages rapid development and clean, codes with the least, and convention over configuration.

Key Features

• With one annotation your Class has fully featured capabilities of SQL programming
• Easy to relational(has_one, has_many and belongs_to) query and paged query
• Writing SQL expressions(arithmetic, comparison and logical) using Java syntax

Why to choose

• If your project focuses on data analysis based on relation database, and a lot of arithmetic expressions in SQL statement. ObjectiveSQL will help you write expressions conveniently and safely using Java syntax
• If you don’t want to write Java codes of database access and various configuration files, ObjectiveSQL's dynamic code generation will help you access the database without coding

Performance(Oracle JMH)

[query_perf](./doc/perf.png)

Installation

IntelliJ IDEA plugin installation

Preferences/Settings -> Plugins -> Search with "ObjectiveSql" in market -> Install

Maven dependencies

<!-- In standalone -->
<dependency>
    <groupId>com.github.braisdom</groupId>
    <artifactId>objective-sql</artifactId>
    <version>1.4.6</version>
</dependency>

<!-- In Spring Boot -->
<dependency>
  <groupId>com.github.braisdom</groupId>
  <artifactId>objsql-springboot</artifactId>
  <version>1.3.4</version>
</dependency>

Refer to the pom.xml for more configuration

Examples

ObjectiveSQL provides full example for various databases below, You can open it directly with IntelliJ IDEA as a standalone project. In fact, they are not just examples, but also unit tests of ObjectiveSQL in various databases.

If you want to run without configuration, you can try: SQLite

Others: MySQL, Oracle, MS SQL Server, PostgreSQL, Spring Boot

Simple SQL programming without coding

You define just a JavaBean with one annotation

@DomainModel
public class Member {
    private String no;

@Queryable
private String name;
private Integer gender;
private String mobile;
private String otherInfo;

@Relation(relationType = RelationType.HAS_MANY)
private List<Order> orders;

}

##### Persistence

```java
Member.create(newMember);
Member.create(new Member[]{newMember1, newMember2, newMember3}, false);

Member.update(1L, newMember, true);
Member.update("name = 'Smith => Jackson'", "name = ?", "Alice");

Member.destroy(1L);
Member.destroy("name = ?", "Mary");

Counting and querying

Member.countAll();
Member.count("id > ?", 1);
Member.queryByPrimaryKey(1);
Member.queryFirst("id = ?", 1);
Member.query("id > ?", 1);
Member.queryAll();

Paged querying

Page page = Page.create(0, 10);
PagedList<Member> members = Member.pagedQueryAll(page, Member.HAS_MANY_ORDERS);

Relation querying

Member.queryAll(Member.HAS_MANY_ORDERS);
Member.queryByPrimary(1, Member.HAS_MANY_ORDERS);
Member.queryByName("demo", Member.HAS_MANY_ORDERS);
...

Complex SQL programming

Order.Table orderTable = Order.asTable();
Select select = new Select();

// In ObjectiveSQL, Java operator can be overloaded
select.project(sum(orderTable.amount) / sum(orderTable.quantity) * 100)
        .from(orderTable)
        .where(orderTable.quantity > 30 &&
            orderTable.salesAt.between("2020-10-10 00:00:00", "2020-10-30 23:59:59"))
        .groupBy(orderTable.productId);

SELECT SUM(`T0`.`amount`) / SUM(`T0`.`quantity`) * 100
FROM `orders` AS `T0`
WHERE `T0`.`quantity` > 30 AND 
       `T0`.`sales_at` BETWEEN '2020-10-10 00:00:00' AND '2020-10-30 23:59:59')
GROUP BY `T0`.`product_id`

Reference documentation

• English
• Chinese(中文)