Fix for EclipseLink bug comparing boolean value in H2 #35022

dev/io.openliberty.data.internal_fat_1_1/publish/servers/io.openliberty.data.internal.fat.1.1/server.xml

@@ -32,7 +32,7 @@
     <jdbcDriver libraryRef="JDBCLibrary"/>
     <!-- TODO remove MODE=LEGACY once EclipseLink fixes bug #35022
          where it tries to compare a boolean attribute to an integer -->
-    <properties.h2 URL="${env.DB_URL};MODE=LEGACY" user="dbuser1" password="dbpwd1"/>
+    <properties.h2 URL="${env.DB_URL}" user="dbuser1" password="dbpwd1"/>
   </dataSource>
 
   <library id="JDBCLibrary">

dev/io.openliberty.data.internal_fat_1_1/test-applications/Data_1_1_App/src/test/jakarta/data/v1_1/web/Data_1_1_Servlet.java

@@ -2646,4 +2646,10 @@ public void testStatefulResourceAccessor() throws Exception {
         }
     }
 
+    @Test
+    public void testBooleanRestriction() {
+        fractions.where(Restrict.all(_Fraction.name.contains("Four"),
+                                     _Fraction.reduced.isTrue()));
+    }
+
 }

dev/io.openliberty.persistence.3.2.thirdparty/src/org/eclipse/persistence/platform/database/H2Platform.java

@@ -290,4 +290,20 @@ public boolean isH2() {
     public String getProcedureCallHeader() {
         return "CALL ";
     }
+
+    /**
+     * Help to generate SQL like WHERE (REDUCED = TRUE) instead of 
+     * WHERE (REDUCED = 1), which is compatible with H2's strict type system
+     * @param bool
+     * @param writer
+     * @throws IOException
+     */
+    @Override
+    protected void appendBoolean(Boolean bool, Writer writer) throws IOException {
+        if (bool) {
+            writer.write("TRUE");
+        } else {
+            writer.write("FALSE");
+        }
+    }
 }