Add support for truncate table (#719)

Author: sarxos

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

@@ -706,7 +706,7 @@ public void visit(Drop drop) {
 
     @Override
     public void visit(Truncate truncate) {
-        throw new UnsupportedOperationException(NOT_SUPPORTED_YET);
+        visit(truncate.getTable());
     }
 
     @Override

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

@@ -197,6 +197,14 @@ public void testGetTableListFromDelete2() throws Exception {
         assertTrue(tableList.contains("MY_TABLE1"));
     }
 
+    @Test
+    public void testGetTableListFromTruncate() throws Exception {
+        String sql = "TRUNCATE TABLE MY_TABLE1";
+        List<String> tables = new TablesNamesFinder().getTableList(pm.parse(new StringReader(sql)));
+        assertEquals(1, tables.size());
+        assertTrue(tables.contains("MY_TABLE1"));
+    }
+
     @Test
     public void testGetTableListFromDeleteWithJoin() throws Exception {
         String sql = "DELETE t1, t2 FROM MY_TABLE1 t1 JOIN MY_TABLE2 t2 ON t1.id = t2.id";