update readme

Author: wumpz

README.md

@@ -28,6 +28,8 @@ The generated hierarchy can be navigated using the Visitor Pattern.
 
 ## Extensions Version 0.8.9
 
+* Backported window option to analytic expression.
+* Added **NULLS FIRST** and **NULLS LAST** to order by.
 * Improved parsing of **top**.
 * Improved support for multi part names (SQLServer) 
 * Better support for signed expressions. The sign is stored in the parse tree.

src/main/java/net/sf/jsqlparser/expression/WindowOffset.java

@@ -54,7 +54,6 @@ public void setType(Type type) {
     public String toString() {
         StringBuilder buffer = new StringBuilder();
         if (expression != null) {
-            buffer.append(' ');
             buffer.append(expression);
             if (type != null) {
                 buffer.append(' ');

src/main/java/net/sf/jsqlparser/expression/WindowRange.java

@@ -45,7 +45,7 @@ public void setStart(WindowOffset start) {
     @Override
     public String toString() {
         StringBuilder buffer = new StringBuilder();
-        buffer.append(" BETWEEN");
+        buffer.append(" BETWEEN ");
         buffer.append(start);
         buffer.append(" AND ");
         buffer.append(end);

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

@@ -1025,7 +1025,7 @@ public void testAnalyticFunction16() throws JSQLParserException {
     }
 
     public void testAnalyticFunction17() throws JSQLParserException {
-        String statement = "SELECT AVG(sal) OVER (PARTITION BY deptno ORDER BY sal ROWS BETWEEN 0 PRECEDING AND  0 PRECEDING) AS avg_of_current_sal FROM emp";
+        String statement = "SELECT AVG(sal) OVER (PARTITION BY deptno ORDER BY sal ROWS BETWEEN 0 PRECEDING AND 0 PRECEDING) AS avg_of_current_sal FROM emp";
         assertSqlCanBeParsedAndDeparsed(statement);
     }