1) The document discusses jOOQ, an object-oriented SQL library that allows writing SQL queries in Java in a type-safe, fluent, and injection-safe manner. 2) jOOQ uses a domain-specific language (DSL) to write SQL queries, requiring only 1 minute of setup. It supports automatic database modeling and generates Java classes from the database schema. 3) The document provides examples of common SQL queries like selects, inserts, filters, joins, and group by written using the jOOQ DSL in a concise and readable way compared to traditional string-based SQL.

1. jOOQ
SQL orientado a objetos
The Developers Conference
São Paulo - 2016

2. Gabriel Saraiva
Desenvolvedor na

3. SQL ❤
String sql = "SELECT * FROM users WHERE email = ?";
PreparedStatement stmt = conn.prepareStatement(sql);
stmt.setString(1,"example@xyz.com");

4. SQL ❤ ?
String sql = "UPDATE products" +
"SET name = ?, ..., price = ?" +
"WHERE id = ?";
PreparedStatement stmt = conn.prepareStatement(sql);
stmt.setString(1, "Café");
// 98 campos depois...
stmt.setLong(99, 123L);
(╯°□°)╯︵ ┻━┻

5. String sql = "SELECT avg(age), cityId " +
"FROM users " +
(filter ? "WHERE cityId IN (...) ":"") +
"GROUP BY cityId " +
(order ? "ORDER BY name DESC":"") +
...
;
SQL !!!

6. SQL:
“Stringish Query Langage” ?
SQL = Structured Query Language

7. O problema não é o SQL.
É como escrevemos SQL.

8. SQL ❤ !!!
String sql = select()
.from(USERS)
.where(
USERS.ID.in(ids)
)
.toString();

9. “The easiest way to write SQL in Java”
or in
Scala

10. jOOQ:
Uma DSL para
escrever SQL

11. Setup:
1 minuto.

12. Setup:
1 minuto.
<dependency>
<groupId>org.jooq</groupId>
<artifactId>jooq</artifactId>
<version>3.8.2</version>
</dependency>
<dependency>
<groupId>org.jooq</groupId>
<artifactId>jooq-meta</artifactId>
<version>3.8.2</version>
</dependency>
<dependency>
<groupId>org.jooq</groupId>
<artifactId>jooq-
codegen</artifactId>
<version>3.8.2</version>
</dependency>

13. Setup:
1 minuto
ou mais!

14. Type Safe
select()
.from(USERS)
.where(
USERS.EMAIL.equal(1234)
)

15. Sintaxe
Fluente
select()
.from(USERS)
.where(
USERS.ID.equal(1234),
USERS.AGE.equal(26)
)

16. SQL
Injection
Safe
String name =
"Bob"); DROP TABLE users; --";
select()
.from(USERS)
.where(
USERS.NAME.eq(name)
)

17. Free:
p/ bancos
Open Source

18. $$$:
p/ bancos
Enterprise
mais informações disponíveis em: http://www.jooq.
org/legal/licensing#databases

19. Modelo
do Banco:
(opcional)
Automático!

20. <configuration>
<jdbc>
<driver>com.mysql.jdbc.Driver</driver>
<url>jdbc:mysql://localhost:3306</url>
<user>root</user>
<password>password</password>
</jdbc>
<generator>
<database>
<name>org.jooq.util.mysql.MySQLDatabase</name>
<includes>.*</includes>
<excludes/>
<inputSchema>example_database</inputSchema>
<unsignedTypes>false</unsignedTypes>
</database>
<target>
<packageName>com.example.database</packageName>
<directory>src/main/java</directory>
</target>
</generator>
</configuration>

21. Usando o jOOQ para
escrever SQL

22. 1 minuto de setup: Sem modelo do db.
String sql = DSL.using(SQLDialect.MYSQL)
.select(field("name"), field("phone"))
.from("users")
.where(
field("id").equal(1234)
)
.toString();

23. 2 minutos de setup: Modelo db automático
String sql = select(USERS.NAME, USERS.PHONE)
.from(USERS)
.where(
USERS.ID.eq(1234L)
)
.toString();

24. Inserts sem
?,?,?,?,?,?,,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?
,?,? será que faltou um ?
String sql = insertInto(USERS)
.set(USERS.NAME,"Gabriel Saraiva")
.set(USERS.PHONE,"16999666333")
.set(USERS.EMAIL,"gabrielsaraiva7@gmail.com")
.toString();

25. Filtros
String sql = select()
.from(PRODUCTS)
.where(PRODUCTS.CATEGORY.eq("drinks")
.or(PRODUCTS.CATEGORY.eq("beers"))
.and(PRODUCTS.NAME.contains("coffee"))
)
.toString();

26. Lista de Filtros
List<Condition> filters = Arrays.asList(
PRODUCTS.CATEGORY.equal("drinks"),
PRODUCTS.PRICE.greaterThan(new BigDecimal(25))
);
String sql = select(PRODUCTS.NAME, PRODUCTS.PRICE)
.from(PRODUCTS)
.where(filters)
.orderBy(PRODUCTS.PRICE.desc())
.toString();

27. Joins!
Users u = USERS;
Orders o = ORDERS;
OrdersProducts op = ORDERS_PRODUCTS;
Products p = PRODUCTS;
String sql = select()
.from(u
.innerJoin(o).on(u.ID.eq(o.USER_ID))
.innerJoin(op).on(o.ID.eq(op.ORDER_ID))
.innerJoin(p).on(p.ID.eq(op.ORDER_ID))
)
.toString();

28. Group By!
String sql = DSL.
select(
u.NAME,
o.ID,
sum(op.PRODUCT_SOLD_PRICE)
)
.from(join)
.where(filters)
.groupBy(o.ID)
.toString();

29. Lendo dados do ResultSet
ResultSet rs = stmt.executeQuery();
rs.next();
return new Product(
rs.getLong(PRODUCTS.ID.getName()),
rs.getString(PRODUCTS.NAME.getName()),
rs.getBigDecimal(PRODUCTS.PRICE.getName()),
rs.getString(PRODUCTS.CATEGORY.getName())
);

30. Escrever SQL
pode ser
divertido!

31. Obrigado
Gabriel Saraiva
gabriel.saraiva7@gmail.com
github.com/gabrsar
twitter/gabrielSaraivaAgradecimentos ❤
Igor Escobar
Giuliano Caliari
Diego Leme