optimize in-expressions for single values

solita · Feb 4, 2015 · cf76da8 · cf76da8
1 parent f4d1b72
commit cf76da8
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/main/java/fi/solita/utils/query/QueryUtils.java b/src/main/java/fi/solita/utils/query/QueryUtils.java
@@ -177,8 +177,11 @@ public static <E> CriteriaQuery<E> applyOrder(CriteriaQuery<E> query, final Sele
 
     public static final Predicate inExpr(CriteriaQuery<?> q, Expression<?> path, Iterable<?> values, CriteriaBuilder cb) {
         List<?> vals = newList(values);
+        if (vals.size() == 1) {
+            return cb.equal(path, head(values));
+        }
         // keep default in-expressions for small sets since oracle performs waaaaaaay better...
-        if (vals.size() > 5 && Table.isSupported(vals)) {
+        else if (vals.size() > 5 && Table.isSupported(vals)) {
             Subquery<Long> tableselect = q.subquery(Long.class);
             Root<Table> root = tableselect.from(Table.class);
             tableselect.select(cb.function("dynamic_sampling", Long.class));