Merge pull request #55 from shuyangzhou/TablesNamesFinder.getTableList(Delete)-NPE

TablesNamesFinder.getTableList(Delete) throws NPE when the sql does not have a where clause

Author: wumpz

src/main/java/net/sf/jsqlparser/util/TablesNamesFinder.java

@@ -59,7 +59,9 @@ public class TablesNamesFinder implements SelectVisitor, FromItemVisitor, Expres
 	public List<String> getTableList(Delete delete) {
 		init();
 		tables.add(delete.getTable().getName());
-		delete.getWhere().accept(this);
+		if (delete.getWhere() != null) {
+			delete.getWhere().accept(this);
+		}
 
 		return tables;
 	}

src/test/java/net/sf/jsqlparser/util/TablesNamesFinderTest.java

@@ -174,6 +174,17 @@ public void testGetTableListFromDelete() throws Exception {
 		assertTrue(tableList.contains("MY_TABLE2"));
 	}
 
+	public void testGetTableListFromDelete2() throws Exception {
+		String sql = "DELETE FROM MY_TABLE1";
+		net.sf.jsqlparser.statement.Statement statement = pm.parse(new StringReader(sql));
+
+		Delete deleteStatement = (Delete) statement;
+		TablesNamesFinder tablesNamesFinder = new TablesNamesFinder();
+		List<String> tableList = tablesNamesFinder.getTableList(deleteStatement);
+		assertEquals(1, tableList.size());
+		assertTrue(tableList.contains("MY_TABLE1"));
+	}
+
 	public void testGetTableListFromInsert() throws Exception {
 		String sql = "INSERT INTO MY_TABLE1 (a) VALUES ((SELECT a from MY_TABLE2 WHERE a = 1))";
 		net.sf.jsqlparser.statement.Statement statement = pm.parse(new StringReader(sql));