Fix select distinct projection with Panache

extensions/panache/hibernate-orm-panache-common/runtime/src/main/java/io/quarkus/hibernate/orm/panache/common/runtime/CommonPanacheQueryImpl.java

@@ -95,15 +95,14 @@ public <T> CommonPanacheQueryImpl<T> project(Class<T> type) {
             int endSelect = lowerCasedTrimmedQuery.indexOf(" from ");
             String trimmedQuery = query.trim();
             // 7 is the length of "select "
-            String selectClause = trimmedQuery.substring(7, endSelect);
+            String selectClause = trimmedQuery.substring(7, endSelect).trim();
             String from = trimmedQuery.substring(endSelect);
             StringBuilder newQuery = new StringBuilder("select ");
             // Handle select-distinct. HQL example: select distinct new org.acme.ProjectionClass...
-            String lowerCasedTrimmedSelect = selectClause.trim().toLowerCase();
-            boolean distinctQuery = lowerCasedTrimmedSelect.startsWith("distinct ");
+            boolean distinctQuery = selectClause.toLowerCase().startsWith("distinct ");
             if (distinctQuery) {
                 // 9 is the length of "distinct "
-                selectClause = lowerCasedTrimmedSelect.substring(9).trim();
+                selectClause = selectClause.substring(9).trim();
                 newQuery.append("distinct ");
             }
 

extensions/panache/hibernate-reactive-panache-common/runtime/src/main/java/io/quarkus/hibernate/reactive/panache/common/runtime/CommonPanacheQueryImpl.java

@@ -82,15 +82,14 @@ public <T> CommonPanacheQueryImpl<T> project(Class<T> type) {
             int endSelect = lowerCasedTrimmedQuery.indexOf(" from ");
             String trimmedQuery = query.trim();
             // 7 is the length of "select "
-            String selectClause = trimmedQuery.substring(7, endSelect);
+            String selectClause = trimmedQuery.substring(7, endSelect).trim();
             String from = trimmedQuery.substring(endSelect);
             StringBuilder newQuery = new StringBuilder("select ");
             // Handle select-distinct. HQL example: select distinct new org.acme.ProjectionClass...
-            String lowerCasedTrimmedSelect = selectClause.trim().toLowerCase();
-            boolean distinctQuery = lowerCasedTrimmedSelect.startsWith("distinct ");
+            boolean distinctQuery = selectClause.toLowerCase().startsWith("distinct ");
             if (distinctQuery) {
                 // 9 is the length of "distinct "
-                selectClause = lowerCasedTrimmedSelect.substring(9).trim();
+                selectClause = selectClause.substring(9).trim();
                 newQuery.append("distinct ");
             }
 

integration-tests/hibernate-orm-panache/src/main/java/io/quarkus/it/panache/TestEndpoint.java

@@ -1253,6 +1253,18 @@ public String testProjection() {
         long countDistinct = projectionDistinctQuery.count();
         Assertions.assertEquals(1L, countDistinct);
 
+        // We are checking that not everything gets lowercased
+        PanacheQuery<CatProjectionBean> letterCaseQuery = Cat
+                // The spaces at the beginning are intentional
+                .find("   SELECT   disTINct  'GARFIELD', 'JoN ArBuCkLe' from Cat c where name = :NamE group by name  ",
+                        Parameters.with("NamE", bubulle.name))
+                .project(CatProjectionBean.class);
+
+        CatProjectionBean catView = letterCaseQuery.firstResult();
+        // Must keep the letter case
+        Assertions.assertEquals("GARFIELD", catView.getName());
+        Assertions.assertEquals("JoN ArBuCkLe", catView.getOwnerName());
+
         Cat.deleteAll();
         CatOwner.deleteAll();
 

integration-tests/hibernate-reactive-panache/src/main/java/io/quarkus/it/panache/reactive/TestEndpoint.java

@@ -1675,6 +1675,16 @@ public Uni<String> testProjection2() {
                     Assertions.assertTrue(
                             exception.getMessage().startsWith("Unable to perform a projection on a 'select new' query"));
                 })
+                .chain(() -> Cat
+                        .find("   SELECT   disTINct  'GARFIELD', 'JoN ArBuCkLe' from Cat c where name = :NamE group by name  ",
+                                Parameters.with("NamE", catName))
+                        .project(CatProjectionBean.class)
+                        .<CatProjectionBean> firstResult())
+                .invoke(catView -> {
+                    // Must keep the letter case
+                    Assertions.assertEquals("GARFIELD", catView.name);
+                    Assertions.assertEquals("JoN ArBuCkLe", catView.ownerName);
+                })
                 .replaceWith("OK");
     }