Available in versions: Dev (3.21) | Latest (3.20) | 3.19 | 3.18 | 3.17 | 3.16 | 3.15 | 3.14 | 3.13 | 3.12 | 3.11

Implicit JOIN paths

Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition

Implicit JOINs are one of jOOQ's most powerful synthetic SQL features, which depends entirely on code generation. The code generator produces links between tables that follow "to-one" relationships (i.e. from child table to parent table). This way, it is possible to greatly simplify your queries:

// Get all books, their authors, and their respective language
create.select(
          BOOK.author().FIRST_NAME,
          BOOK.author().LAST_NAME,
          BOOK.TITLE,
          BOOK.language().CD.as("language"))
      .from(BOOK)
      .fetch();

The feature has a few feature toggles in the code generator, including:

XML (standalone and maven)

Programmatic

Gradle (Kotlin)

Gradle (Groovy)

Gradle (third party)

<configuration>
  <generator>
    <generate>

      <!-- Allowing to turn off the feature entirely. The default is true. -->
      <implicitJoinPathsToOne>true</implicitJoinPathsToOne>
    </generate>
  </generator>
</configuration>

See the configuration XSD, standalone code generation, and maven code generation for more details.

new org.jooq.meta.jaxb.Configuration()
  .withGenerator(
    new Generate()

      // Allowing to turn off the feature entirely. The default is true.
      .withImplicitJoinPathsToOne(true)
  )

See the configuration XSD and programmatic code generation for more details.

// The jOOQ-codegen-gradle plugin has been introduced in version 3.19 only.

// The jOOQ-codegen-gradle plugin has been introduced in version 3.19 only.

generationTool {
  generator {
    generate {

      // Allowing to turn off the feature entirely. The default is true.
      implicitJoinPathsToOne = true
    }
  }
}

See the configuration XSD and gradle code generation for more details.