Fix get_real_name for names with more than two dotted parts (#332)

sqlparse/sql.py

@@ -18,8 +18,11 @@ class NameAliasMixin:
 
     def get_real_name(self):
         """Returns the real name (object name) of this identifier."""
-        # a.b
-        dot_idx, _ = self.token_next_by(m=(T.Punctuation, '.'))
+        # a.b.c -> real name is the component after the *last* dot
+        dot_idx = None
+        for idx, tok in enumerate(self.tokens):
+            if tok.match(T.Punctuation, '.'):
+                dot_idx = idx
         return self._get_first_name(dot_idx, real_name=True)
 
     def get_alias(self):

tests/test_parse.py

@@ -466,6 +466,24 @@ def test_get_real_name():
     assert 't' == stmts[0].tokens[2].get_alias()
 
 
+def test_get_real_name_multi_part_dotted():
+    # issue 332: for a fully-qualified name the real name is the component
+    # after the *last* dot, not an intermediate one.
+    ident = sqlparse.parse("db.schema.tbl.col")[0].tokens[0]
+    assert 'col' == ident.get_real_name()
+    assert 'col' == ident.get_name()
+    # the parent object still anchors on the first dot
+    assert 'db' == ident.get_parent_name()
+
+    aliased = sqlparse.parse("x.y.z AS w")[0].tokens[0]
+    assert 'z' == aliased.get_real_name()
+    assert 'w' == aliased.get_alias()
+
+    # two-part names and function calls stay correct
+    assert 'b' == sqlparse.parse("a.b")[0].tokens[0].get_real_name()
+    assert 'func' == sqlparse.parse("mydb.sch.func(1)")[0].tokens[0].get_real_name()
+
+
 def test_from_subquery():
     # issue 446
     s = 'from(select 1)'