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jOOQ Object Oriented Querying, commonly known as jOOQ, is a light database-mapping software library in Java that implements the active record pattern. Its purpose is to be both relational and object oriented by providing a domain-specific language to construct queries from classes generated from a database schema.
Paradigm
jOOQ claims that SQL should come first in any database integration. Thus, it does not introduce a new textual query language, but rather allows for constructing plain SQL from jOOQ objects and code generated from a database schema. jOOQ uses JDBC to call the underlying SQL queries.
While it provides abstraction on top of JDBC, jOOQ does not have as much functionality and complexity as standard object–relational mapping libraries such as EclipseLink or Hibernate.
jOOQ's closeness to SQL has advantages over typical object–relational mapping libraries. SQL has many features that cannot be used in an object oriented programming paradigm; this set of differences is referred to as the object–relational impedance mismatch. By being close to SQL, jOOQ helps to prevent syntax errors and type mapping problems. Also, variable binding is taken care of. It is also possible in jOOQ to create very complex queries, that involve aliasing, unions, nested selects and complex joins. jOOQ also supports database-specific features, such as UDTs, enum types, stored procedures and native functions.
Example
A nested query selecting from an aliased table
And its equivalent in jOOQ DSL:
Or more simply, using code generation from the database metadata to generate constants:
See also
Apache Calcite
List of object–relational mapping software
SQL/OLB
References
External links
jOOQ Home
Using Spring Boot with jOOQ
JSR-341
JaQu Archived 2021-05-05 at the Wayback Machine
Linq4j
Quaere
QueryDSL
Kata Kunci Pencarian:
jooq object oriented queryingjooq java object oriented queryingJooq-Java Object Oriented Querying | PDF | Sql | Databases
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Jooq java object oriented querying | PDF
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jOOQ Object Oriented Querying
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jOOQ: The easiest way to write SQL in Java
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jOOQ: The easiest way to write SQL in Java
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jOOQ: The easiest way to write SQL in Java
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jOOQ manuals, tutorials, FAQs, references
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Free downloads and pricing for jOOQ
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Free downloads and pricing for jOOQ
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GitHub - jOOQ/jOOQ: jOOQ is the best way to write SQL in Java
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GitHub - jOOQ/jOOQ: jOOQ is the best way to write SQL in Java
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GitHub - jOOQ/jOOQ: jOOQ is the best way to write SQL in Java