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median function documentation, improve test

This commit is contained in:
Gavin King 2024-12-06 21:52:38 +01:00
parent fa772e5cc8
commit 02cf728bcb
4 changed files with 15 additions and 4 deletions
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4
documentation/src/main/asciidoc/querylanguage/Relational.adoc
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@ -178,6 +178,7 @@ The standard aggregate functions defined in both ANSI SQL and JPQL are these one
| `count()`, including `count(distinct)`, `count(all)`, and `count(*)` | Any | `Long` | ✔/✔
| `avg()` | Any numeric type | `Double` | ✔/✔
| `median()` | Any numeric type | `Double` | ✖/✖
| `min()` | Any numeric type, or string | Same as the argument type | ✔/✔
| `max()` | Any numeric type, or string | Same as the argument type | ✔/✔
| `sum()` | Any numeric type | See table below | ✔/✔
@ -185,6 +186,9 @@ The standard aggregate functions defined in both ANSI SQL and JPQL are these one
| `stddev_pop()`, `stddev_samp()` | Any numeric type | `Double` | ✖/✔
|===
[NOTE]
The `median()` function is not supported on MySQL or Sybase ASE.
[[aggregate-functions-example]]
[source, hql]
[%unbreakable]

3
hibernate-core/src/main/java/org/hibernate/dialect/HSQLDialect.java
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@ -62,6 +62,9 @@ import static org.hibernate.type.SqlTypes.NCLOB;
/**
* A {@linkplain Dialect SQL dialect} for HSQLDB (HyperSQL) 2.6.1 and above.
* <p>
* Please refer to the
* <a href="https://hsqldb.org/doc/2.0/guide/index.html">HyperSQL User Guide</a>.
*
* @author Christoph Sturm
* @author Phillip Baird

6
hibernate-core/src/test/java/org/hibernate/orm/test/query/hql/FunctionTests.java
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@ -2316,6 +2316,12 @@ public class FunctionTests {
public void testMedian(SessionFactoryScope scope) {
scope.inTransaction(
session -> {
assertEquals( 1.0,
session.createQuery("select median(e.theDouble) from EntityOfBasics e", Double.class).getSingleResult(),
1e-5);
assertEquals( 5.0,
session.createQuery("select median(e.theInt) from EntityOfBasics e", Double.class).getSingleResult(),
1e-5);
List<Object[]> list = session.createQuery("select median(e.theDouble), median(e.theInt) from EntityOfBasics e", Object[].class)
.list();
assertEquals( 1, list.size() );

6
hibernate-testing/src/main/java/org/hibernate/testing/orm/junit/DialectFeatureChecks.java
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@ -552,13 +552,11 @@ abstract public class DialectFeatureChecks {
public static class SupportsMedian implements DialectFeatureCheck {
public boolean apply(Dialect dialect) {
dialect = DialectDelegateWrapper.extractRealDialect( dialect );
return !( dialect instanceof MySQLDialect
return !( dialect instanceof MySQLDialect && !(dialect instanceof MariaDBDialect)
|| dialect instanceof SybaseDialect
|| dialect instanceof DerbyDialect
|| dialect instanceof FirebirdDialect
|| dialect instanceof DB2Dialect && ( (DB2Dialect) dialect ).getDB2Version().isBefore( 11 ) )
|| dialect instanceof InformixDialect
|| dialect instanceof MariaDBDialect;
|| dialect instanceof DB2Dialect && ( (DB2Dialect) dialect ).getDB2Version().isBefore( 11 ) );
}
}