fixes #670

added testcase, corrected deparser

Author: wumpz

src/main/java/net/sf/jsqlparser/util/deparser/ExpressionDeParser.java

@@ -23,7 +23,6 @@
 
 import java.util.Iterator;
 import java.util.List;
-
 import net.sf.jsqlparser.expression.AllComparisonExpression;
 import net.sf.jsqlparser.expression.AnalyticExpression;
 import net.sf.jsqlparser.expression.AnyComparisonExpression;
@@ -45,7 +44,6 @@
 import net.sf.jsqlparser.expression.KeepExpression;
 import net.sf.jsqlparser.expression.LongValue;
 import net.sf.jsqlparser.expression.MySQLGroupConcat;
-import net.sf.jsqlparser.expression.ValueListExpression;
 import net.sf.jsqlparser.expression.NotExpression;
 import net.sf.jsqlparser.expression.NullValue;
 import net.sf.jsqlparser.expression.NumericBind;
@@ -59,6 +57,7 @@
 import net.sf.jsqlparser.expression.TimeValue;
 import net.sf.jsqlparser.expression.TimestampValue;
 import net.sf.jsqlparser.expression.UserVariable;
+import net.sf.jsqlparser.expression.ValueListExpression;
 import net.sf.jsqlparser.expression.WhenClause;
 import net.sf.jsqlparser.expression.WindowElement;
 import net.sf.jsqlparser.expression.operators.arithmetic.Addition;
@@ -624,6 +623,9 @@ public void visit(AnalyticExpression aexpr) {
         } else if (isAllColumns) {
             buffer.append("*");
         }
+        if (aexpr.isIgnoreNulls()) {
+            buffer.append(" IGNORE NULLS");
+        }
         buffer.append(") ");
         if (keep != null) {
             keep.accept(this);

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

@@ -1780,7 +1780,7 @@ public void testAnalyticFunctionProblem1b() throws JSQLParserException {
 
     @Test
     public void testAnalyticFunctionIssue670() throws JSQLParserException {
-        assertSqlCanBeParsedAndDeparsed("SELECT last_value(some_column IGNORE NULLS) OVER ( PARTITION BY some_other_column_1, some_other_column_2 ORDER BY some_other_column_3 ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) column_alias FROM some_table");
+        assertSqlCanBeParsedAndDeparsed("SELECT last_value(some_column IGNORE NULLS) OVER (PARTITION BY some_other_column_1, some_other_column_2 ORDER BY some_other_column_3 ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) column_alias FROM some_table");
     }
 
     @Test