Upstream andialbrecht/sqlparse state of the touched files before 730ddba559

sqlparse/engine/grouping.py

@@ -309,34 +309,13 @@ def group_operator(tlist):
 
 def group_identifier_list(tlist):
     m_role = T.Keyword, ('null', 'role')
-    m_to = T.Keyword, 'TO'
     sqlcls = (sql.Function, sql.Case, sql.Identifier, sql.Comparison,
               sql.IdentifierList, sql.Operation)
     ttypes = (T_NUMERICAL + T_STRING + T_NAME
               + (T.Keyword, T.Comment, T.Wildcard))
 
-    def is_rename_separator(token):
-        # In ``RENAME TABLE a TO b, c TO d`` the comma separates independent
-        # rename clauses, so the target of one clause (``b``) and the source
-        # of the next (``c``) must not be merged into a single IdentifierList.
-        # Detect that layout by the ``TO`` keywords flanking both sides of the
-        # comma and leave such a comma ungrouped (issue779).
-        parent = token.parent
-        if parent is None:
-            return False
-        cidx = parent.token_index(token)
-        pidx, prev_ = parent.token_prev(cidx)
-        nidx, next_ = parent.token_next(cidx)
-        if prev_ is None or next_ is None:
-            return False
-        _, before_prev = parent.token_prev(pidx)
-        _, after_next = parent.token_next(nidx)
-        return (before_prev is not None and before_prev.match(*m_to)
-                and after_next is not None and after_next.match(*m_to))
-
     def match(token):
-        return token.match(T.Punctuation, ',') \
-            and not is_rename_separator(token)
+        return token.match(T.Punctuation, ',')
 
     def valid(token):
         return imt(token, i=sqlcls, m=m_role, t=ttypes)