jOOQ has DSLContext.fetchExists(Select<?>) if you want to make that a
standalone call:
http://www.jooq.org/javadoc/latest/org/jooq/DSLContext.html#fetchExists-org.jooq.Select-

This was added in jOOQ 3.5

If you want to embed your EXISTS predicate in a bigger SELECT, you can
combine:
-
http://www.jooq.org/javadoc/latest/org/jooq/impl/DSL.html#exists-org.jooq.Select-
-
http://www.jooq.org/javadoc/latest/org/jooq/impl/DSL.html#field-org.jooq.Condition-

As in:

Field<Boolean> field = field(
    exists(
        selectOne().from(CONTACT).where(CONTACT.ID.eq(12))
    )
);


Hope this helps,
Lukas

2014-12-16 9:56 GMT+01:00 Marcel Huber <[email protected]>:
>
> referring to http://stackoverflow.com/a/16467634/426834 "select exists"
> returns "true" or "false" for the subquery. What is the idiomatic
> equivalent in jooq?
>
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