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HHH-17748 update HQL doc

This commit is contained in:
Gavin King 2024-02-18 22:36:40 +01:00
parent 777dede7da
commit 45a3ed9565
1 changed files with 25 additions and 1 deletions
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documentation/src/main/asciidoc/querylanguage/Expressions.adoc
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@ -172,8 +172,32 @@ Literal values of a Java enumerated type may be written without needing to speci
----
from Book where status <> OUT_OF_PRINT
----
[source, hql]
----
from Book where type in (BOOK, MAGAZINE)
----
[source, hql]
----
update Book set status = OUT_OF_PRINT
----
Here, the enum class is inferred from the type of the expression on the left of the comparison operator.
In the examples above, the enum class is inferred from the type of the expression on the left of the comparison, assignment operator, or
`in` predicate.
[[enum-case-example]]
[source, hql]
----
from Book
order by
case type
when BOOK then 1
when MAGAZINE then 2
when JOURNAL then 3
else 4
end
----
In this example the enum class is inferred from the type of the `case` expression.
[[java-constants]]
==== Java constants