fixes #773 added nextval as a valid object name

Author: wumpz

src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt

@@ -1049,7 +1049,7 @@ String RelObjectNameWithoutValue() :
 	  | tk=<K_UNSIGNED>
       | tk=<K_TEMP> | tk=<K_TEMPORARY> | tk=<K_TYPE> | tk=<K_ISNULL> 
 	  | tk=<K_ZONE> | tk=<K_COLUMNS> | tk=<K_DESCRIBE> | tk=<K_FN> | tk=<K_PATH>
-      | tk=<K_DATE_LITERAL>
+      | tk=<K_DATE_LITERAL> | tk=<K_NEXTVAL>
 /*      | tk=<K_PLACING> | tk=<K_BOTH> | tk=<K_LEADING> | tk=<K_TRAILING> */
       )
 
@@ -2725,7 +2725,7 @@ Expression PrimaryExpression() #PrimaryExpression:
 
         | LOOKAHEAD(2) retval=DateTimeLiteralExpression()
 
-        | retval = NextValExpression()
+        | LOOKAHEAD(2) retval = NextValExpression()
 
         | retval=Column() 
 

src/test/java/net/sf/jsqlparser/statement/insert/InsertTest.java

@@ -298,4 +298,10 @@ public void testWithAtFront() throws JSQLParserException {
     public void testNextVal() throws JSQLParserException {
         assertSqlCanBeParsedAndDeparsed("INSERT INTO tracker (monitor_id, user_id, module_name, item_id, item_summary, team_id, date_modified, action, visible, id) VALUES (?, ?, ?, ?, ?, ?, to_date(?, 'YYYY-MM-DD HH24:MI:SS'), ?, ?, NEXTVAL FOR TRACKER_ID_SEQ)");
     }
+
+    @Test
+    public void testNextValIssue773() throws JSQLParserException {
+        assertSqlCanBeParsedAndDeparsed("INSERT INTO tableA (ID, c1, c2) SELECT hibernate_sequence.nextval, c1, c2 FROM tableB");
+    }
+
 }