corrected comma list to partition by

Author: wumpz

src/main/javacc/net/sf/jsqlparser/parser/JSqlParserCC.jj

@@ -1531,7 +1531,7 @@ AnalyticExpression AnalyticExpression() :
 }
 {
 	token=<S_IDENTIFIER> { retval.setName(token.image); } "(" [ expr=SimpleExpression() | "*" { retval.setAllColumns(true); } ] ")" <K_OVER> "(" 
-        [<K_PARTITION> <K_BY> (column=Column() {plist.add(column);} )+ ] 
+        [<K_PARTITION> <K_BY> column=Column() {plist.add(column);}  ("," column=Column() {plist.add(column);} )* ] 
         [olist=OrderByElements() ]
 	{
 		retval.setExpression(expr);

src/test/java/net/sf/jsqlparser/test/select/SelectTest.java

@@ -671,6 +671,11 @@ public void testProblemSqlAnalytic8Complex() throws JSQLParserException {
 		String stmt = "SELECT ID, NAME, SALARY, SUM(SALARY) OVER () AS SUM_SAL, AVG(SALARY) OVER () AS AVG_SAL, MIN(SALARY) OVER () AS MIN_SAL, MAX(SALARY) OVER () AS MAX_SAL, COUNT(*) OVER () AS ROWS FROM STAFF WHERE ID < 60 ORDER BY ID";
 		assertSqlCanBeParsedAndDeparsed(stmt);
 	}
+	
+	public void testProblemSqlAnalytic9CommaListPartition() throws JSQLParserException {
+		String stmt = "SELECT a, row_number() OVER (PARTITION BY c, d ORDER BY a, b) AS n FROM table1";
+		assertSqlCanBeParsedAndDeparsed(stmt);
+	}
 
 	public void testOracleJoin() throws JSQLParserException {
 		String stmt = "SELECT * FROM tabelle1, tabelle2 WHERE tabelle1.a = tabelle2.b(+)";