[3.0] Issue 1779: Add DB2zOS support for UNICODE Timestamps

foundation/org.eclipse.persistence.core/src/main/java/org/eclipse/persistence/platform/database/DB2ZPlatform.java

@@ -1,6 +1,6 @@
 /*
- * Copyright (c) 2015, 2022 Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2015, 2022 IBM Corporation. All rights reserved.
+ * Copyright (c) 2015, 2023 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2023 IBM Corporation. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0 which is available at
@@ -56,6 +56,7 @@
 import org.eclipse.persistence.mappings.structures.ObjectRelationalDatabaseField;
 import org.eclipse.persistence.platform.database.converters.StructConverter;
 import org.eclipse.persistence.queries.StoredProcedureCall;
+import org.eclipse.persistence.queries.ValueReadQuery;
 
 /**
  * <b>Purpose</b>: Provides DB2 z/OS specific behavior.
@@ -112,6 +113,25 @@ public String getProcedureOptionList() {
         return " DISABLE DEBUG MODE ";
     }
 
+    /**
+     * INTERNAL:
+     * This method returns the query to select the timestamp from the server for
+     * DB2.
+     */
+    @Override
+    public ValueReadQuery getTimestampQuery() {
+        if (timestampQuery == null) {
+            if (getUseNationalCharacterVaryingTypeForString()) {
+                timestampQuery = new ValueReadQuery();
+                timestampQuery.setSQLString("SELECT CAST (CURRENT TIMESTAMP AS TIMESTAMP CCSID UNICODE) FROM SYSIBM.SYSDUMMY1");
+                timestampQuery.setAllowNativeSQLQuery(true);
+            } else {
+                timestampQuery = super.getTimestampQuery();
+            }
+        }
+        return timestampQuery;
+    }
+
     /**
      * INTERNAL:
      * Initialize any platform-specific operators

jpa/eclipselink.jpa.test.jse/src/it/java/org/eclipse/persistence/jpa/test/query/TestQuerySyntaxFunctionTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 IBM Corporation. All rights reserved.
+ * Copyright (c) 2022, 2023 IBM Corporation. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0 which is available at
@@ -3191,7 +3191,7 @@ public void testLocate1_PartialBind() {
             query.getResultList();
             Assert.assertEquals(1, _sql2.size());
             if(platform.isDB2Z()) {
-                Assert.assertEquals("SELECT INTVAL1 FROM QUERYSYNTAXENTITY WHERE (INTVAL1 = LOCATE('HI', 'ABCDEFGHIJKLMNOP'))", _sql.remove(0));
+                Assert.assertEquals("SELECT INTVAL1 FROM QUERYSYNTAXENTITY WHERE (INTVAL1 = LOCATE('HI', 'ABCDEFGHIJKLMNOP'))", _sql2.remove(0));
             } else if(platform.isDB2() || platform.isDerby()) {
                 Assert.assertEquals("SELECT INTVAL1 FROM QUERYSYNTAXENTITY WHERE (INTVAL1 = LOCATE('HI', 'ABCDEFGHIJKLMNOP'))", _sql2.remove(0));
             } else if(platform.isOracle()) {

jpa/eclipselink.jpa.test.jse/src/it/java/org/eclipse/persistence/jpa/test/storedproc/TestStoredProceduresCursors.java

@@ -1,6 +1,6 @@
 /*
- * Copyright (c) 2019, 2020 Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2019 IBM Corporation. All rights reserved.
+ * Copyright (c) 2019, 2023 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2023 IBM Corporation. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0 which is available at
@@ -156,7 +156,7 @@ private static boolean createCursorStoredProcedure(EntityManagerFactory emf) {
             if(platform.isOracle()) {
                 proc.addOutputArgument("out_cursor_one", "SYS_REFCURSOR");
                 proc.addStatement("OPEN out_cursor_one FOR SELECT ITEM_STRING1 FROM STORED_PROCEDURE_ENTITY WHERE ITEM_INTEGER1 = in_param_one");
-            } else if (platform.isDB2()) {
+            } else if (platform.isDB2() && !platform.isDB2Z()) {
                 proc.addOutputArgument("out_cursor_one", "CURSOR");
                 proc.addStatement("SET out_cursor_one = CURSOR FOR SELECT ITEM_STRING1 FROM STORED_PROCEDURE_ENTITY WHERE ITEM_INTEGER1 = in_param_one; OPEN out_cursor_one");
             } else {

jpa/eclipselink.jpa.test.jse/src/it/java/org/eclipse/persistence/jpa/test/version/TestVersioning.java

@@ -1,6 +1,6 @@
 /*
- * Copyright (c) 2018, 2020 Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2018 IBM and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2023 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2023 IBM and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0 which is available at
@@ -38,7 +38,9 @@ public class TestVersioning {
 	@Emf(createTables = DDLGen.DROP_CREATE, classes = { TemporalVersionedEntity.class, TemporalVersionedEntity2.class,
 			IntegerVersionedEntity.class},
 			properties = { @Property(name="eclipselink.logging.level", value="FINE"),
-					       @Property(name="eclipselink.logging.parameters", value="true")})
+					       @Property(name="eclipselink.logging.parameters", value="true"),
+                           @Property(name = "eclipselink.target-database-properties",
+                           value = "UseNationalCharacterVaryingTypeForString=true")})
     private EntityManagerFactory emf;
 
 	private final static String qStr1 = "UPDATE TemporalVersionedEntity " +