HHH-18246 Fix for Informix nulls precedence support

Author: VladoKuruc

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/InformixDialect.java

@@ -18,6 +18,7 @@
 import org.hibernate.community.dialect.unique.InformixUniqueDelegate;
 import org.hibernate.dialect.DatabaseVersion;
 import org.hibernate.dialect.Dialect;
+import org.hibernate.dialect.NullOrdering;
 import org.hibernate.dialect.Replacer;
 import org.hibernate.dialect.SelectItemReferenceStrategy;
 import org.hibernate.dialect.function.CaseLeastGreatestEmulation;
@@ -432,6 +433,16 @@ public SequenceInformationExtractor getSequenceInformationExtractor() {
 		return SequenceInformationExtractorInformixDatabaseImpl.INSTANCE;
 	}
 
+	@Override
+	public NullOrdering getNullOrdering() {
+		return NullOrdering.SMALLEST;
+	}
+
+	@Override
+	public boolean supportsNullPrecedence() {
+		return getVersion().isSameOrAfter( 12, 10 );
+	}
+
 	@Override
 	public LimitHandler getLimitHandler() {
 		return limitHandler;