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From:Alexander Nozdrin Date:February 20 2008 12:00pm
Subject:bk commit into 5.1 tree (anozdrin:1.2561) BUG#34337
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Below is the list of changes that have just been committed into a local
5.1 repository of anozdrin.  When anozdrin does a push these changes
will be propagated to the main repository and, within 24 hours after the
push, to the public repository.
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see http://dev.mysql.com/doc/mysql/en/installing-source-tree.html

ChangeSet@stripped, 2008-02-20 15:00:07+03:00, anozdrin@quad. +3 -0
  Fix for Bug#34337: Server crash when Altering a view using
  a table name.
  
  The problem was that fill_defined_view_parts() did not return
  an error if a table is going to be altered. That happened if
  the table was already in the table cache. In that case,
  open_table() returned non-NULL value (valid TABLE-instance from
  the cache).
  
  The fix is to ensure that an error is thrown even if the table
  is in the cache.

  mysql-test/r/view.result@stripped, 2008-02-20 15:00:06+03:00, anozdrin@quad. +15 -0
    Fix result file.

  mysql-test/t/view.test@stripped, 2008-02-20 15:00:06+03:00, anozdrin@quad. +28 -0
    Add a test case for Bug#34337: Server crash when Altering a view
    using a table name.

  sql/sql_view.cc@stripped, 2008-02-20 15:00:06+03:00, anozdrin@quad. +19 -3
    Report an error if we're going to work with a table.

diff -Nrup a/mysql-test/r/view.result b/mysql-test/r/view.result
--- a/mysql-test/r/view.result	2008-02-12 22:09:14 +03:00
+++ b/mysql-test/r/view.result	2008-02-20 15:00:06 +03:00
@@ -3721,5 +3721,20 @@ DROP VIEW v1;
 # -- End of test case for Bug#32538.
 
 # -----------------------------------------------------------------
+# -- Bug#34337: Server crash when Altering a view using a table name.
+# -----------------------------------------------------------------
+
+DROP TABLE IF EXISTS t1;
+
+CREATE TABLE t1(c1 INT);
+
+ALTER ALGORITHM=TEMPTABLE SQL SECURITY INVOKER VIEW t1 (c2) AS SELECT (1);
+ERROR HY000: 'test.t1' is not VIEW
+
+DROP TABLE t1;
+
+# -- End of test case for Bug#34337.
+
+# -----------------------------------------------------------------
 # -- End of 5.1 tests.
 # -----------------------------------------------------------------
diff -Nrup a/mysql-test/t/view.test b/mysql-test/t/view.test
--- a/mysql-test/t/view.test	2008-02-12 22:09:14 +03:00
+++ b/mysql-test/t/view.test	2008-02-20 15:00:06 +03:00
@@ -3604,5 +3604,33 @@ DROP VIEW v1;
 ###########################################################################
 
 --echo # -----------------------------------------------------------------
+--echo # -- Bug#34337: Server crash when Altering a view using a table name.
+--echo # -----------------------------------------------------------------
+--echo
+
+--disable_warnings
+DROP TABLE IF EXISTS t1;
+--enable_warnings
+
+--echo
+
+CREATE TABLE t1(c1 INT);
+
+--echo
+
+--error ER_WRONG_OBJECT
+ALTER ALGORITHM=TEMPTABLE SQL SECURITY INVOKER VIEW t1 (c2) AS SELECT (1);
+
+--echo
+
+DROP TABLE t1;
+
+--echo
+--echo # -- End of test case for Bug#34337.
+--echo
+
+###########################################################################
+
+--echo # -----------------------------------------------------------------
 --echo # -- End of 5.1 tests.
 --echo # -----------------------------------------------------------------
diff -Nrup a/sql/sql_view.cc b/sql/sql_view.cc
--- a/sql/sql_view.cc	2008-02-19 15:45:17 +03:00
+++ b/sql/sql_view.cc	2008-02-20 15:00:06 +03:00
@@ -182,10 +182,26 @@ fill_defined_view_parts (THD *thd, TABLE
   TABLE_LIST decoy;
 
   memcpy (&decoy, view, sizeof (TABLE_LIST));
-  if (!open_table(thd, &decoy, thd->mem_root, &not_used, OPEN_VIEW_NO_PARSE) &&
-      !decoy.view)
+
+  /*
+    open_table() will return NULL if 'decoy' is idenitifying a view *and*
+    there is no TABLE object for that view in the table cache. However,
+    decoy.view will be set to 1.
+
+    If there is a TABLE-instance for the oject identified by 'decoy',
+    open_table() will return that instance no matter if it is a table or
+    a view.
+
+    Thus, there is no need to check for the return value of open_table(),
+    since the return value itself does not mean anything.
+  */
+
+  open_table(thd, &decoy, thd->mem_root, &not_used, OPEN_VIEW_NO_PARSE);
+
+  if (!decoy.view)
   {
-    /* It's a table */
+    /* It's a table. */
+    my_error(ER_WRONG_OBJECT, MYF(0), view->db, view->table_name, "VIEW");
     return TRUE;
   }
 
Thread
bk commit into 5.1 tree (anozdrin:1.2561) BUG#34337Alexander Nozdrin20 Feb
  • Re: bk commit into 5.1 tree (anozdrin:1.2561) BUG#34337Konstantin Osipov20 Feb