Merge gshchepa@bk-internal.mysql.com:/home/bk/mysql-5.0-opt

into  gleb.loc:/home/uchum/work/bk/mysql-5.0-opt

mysql-test/r/view.result

@@ -3394,4 +3394,65 @@ WHERE t1.id=t2.id AND 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
 UPDATE v1 SET c=1;
 DROP VIEW v1;
 DROP TABLE t1,t2;
+CREATE TABLE t1 (a1 INT, c INT DEFAULT 0);
+CREATE TABLE t2 (a2 INT);
+CREATE TABLE t3 (a3 INT);
+CREATE TABLE t4 (a4 INT);
+INSERT INTO t1 (a1) VALUES (1),(2);
+INSERT INTO t2 (a2) VALUES (1),(2);
+INSERT INTO t3 (a3) VALUES (1),(2);
+INSERT INTO t4 (a4) VALUES (1),(2);
+CREATE VIEW v1 AS
+SELECT t1.a1, t1.c FROM t1 JOIN t2 ON t1.a1=t2.a2 AND t1.c < 3
+WITH CHECK OPTION;
+SELECT * FROM v1;
+a1	c
+1	0
+2	0
+UPDATE v1 SET c=3;
+ERROR HY000: CHECK OPTION failed 'test.v1'
+PREPARE t FROM 'UPDATE v1 SET c=3';
+EXECUTE t;
+ERROR HY000: CHECK OPTION failed 'test.v1'
+EXECUTE t;
+ERROR HY000: CHECK OPTION failed 'test.v1'
+INSERT INTO v1(a1, c) VALUES (3, 3);
+ERROR HY000: CHECK OPTION failed 'test.v1'
+UPDATE v1 SET c=1 WHERE a1=1;
+SELECT * FROM v1;
+a1	c
+1	1
+2	0
+SELECT * FROM t1;
+a1	c
+1	1
+2	0
+CREATE VIEW v2 AS SELECT t1.a1, t1.c
+FROM (t1 JOIN t2 ON t1.a1=t2.a2 AND t1.c < 3)
+JOIN (t3 JOIN t4 ON t3.a3=t4.a4)
+ON t2.a2=t3.a3 WITH CHECK OPTION;
+SELECT * FROM v2;
+a1	c
+1	1
+2	0
+UPDATE v2 SET c=3;
+ERROR HY000: CHECK OPTION failed 'test.v2'
+PREPARE t FROM 'UPDATE v2 SET c=3';
+EXECUTE t;
+ERROR HY000: CHECK OPTION failed 'test.v2'
+EXECUTE t;
+ERROR HY000: CHECK OPTION failed 'test.v2'
+INSERT INTO v2(a1, c) VALUES (3, 3);
+ERROR HY000: CHECK OPTION failed 'test.v2'
+UPDATE v2 SET c=2 WHERE a1=1;
+SELECT * FROM v2;
+a1	c
+1	2
+2	0
+SELECT * FROM t1;
+a1	c
+1	2
+2	0
+DROP VIEW v1,v2;
+DROP TABLE t1,t2,t3,t4;
 End of 5.0 tests.

mysql-test/t/view.test

@@ -3268,4 +3268,56 @@ UPDATE v1 SET c=1;
 DROP VIEW v1;
 DROP TABLE t1,t2;
 
+#
+# Bug #27827: CHECK OPTION ignores ON conditions when updating
+#             a multi-table view with CHECK OPTION.
+#
+
+CREATE TABLE t1 (a1 INT, c INT DEFAULT 0);
+CREATE TABLE t2 (a2 INT);
+CREATE TABLE t3 (a3 INT);
+CREATE TABLE t4 (a4 INT);
+INSERT INTO t1 (a1) VALUES (1),(2);
+INSERT INTO t2 (a2) VALUES (1),(2);
+INSERT INTO t3 (a3) VALUES (1),(2);
+INSERT INTO t4 (a4) VALUES (1),(2);
+
+CREATE VIEW v1 AS
+  SELECT t1.a1, t1.c FROM t1 JOIN t2 ON t1.a1=t2.a2 AND t1.c < 3
+    WITH CHECK OPTION;
+SELECT * FROM v1;
+--error 1369
+UPDATE v1 SET c=3;
+PREPARE t FROM 'UPDATE v1 SET c=3';
+--error 1369
+EXECUTE t;
+--error 1369
+EXECUTE t;
+--error 1369
+INSERT INTO v1(a1, c) VALUES (3, 3);
+UPDATE v1 SET c=1 WHERE a1=1;
+SELECT * FROM v1;
+SELECT * FROM t1;
+
+CREATE VIEW v2 AS SELECT t1.a1, t1.c
+  FROM (t1 JOIN t2 ON t1.a1=t2.a2 AND t1.c < 3)
+  JOIN (t3 JOIN t4 ON t3.a3=t4.a4)
+    ON t2.a2=t3.a3 WITH CHECK OPTION;
+SELECT * FROM v2;
+--error 1369
+UPDATE v2 SET c=3;
+PREPARE t FROM 'UPDATE v2 SET c=3';
+--error 1369
+EXECUTE t;
+--error 1369
+EXECUTE t;
+--error 1369
+INSERT INTO v2(a1, c) VALUES (3, 3);
+UPDATE v2 SET c=2 WHERE a1=1;
+SELECT * FROM v2;
+SELECT * FROM t1;
+
+DROP VIEW v1,v2;
+DROP TABLE t1,t2,t3,t4;
+
 --echo End of 5.0 tests.

sql/sql_view.cc

@@ -706,7 +706,7 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
   DBUG_PRINT("info", ("View: %s", str.ptr()));
 
   /* fill structure */
-  view->query.str= str.c_ptr();
+  view->query.str= str.c_ptr_safe();
   view->query.length= str.length();
   view->source.str= thd->query + thd->lex->create_view_select_start;
   view->source.length= skip_rear_comments((char *)view->source.str,

sql/table.cc

@@ -1985,6 +1985,47 @@ bool st_table_list::prep_where(THD *thd, Item **conds,
 }
 
 
+/*
+  Merge ON expressions for a view
+
+  SYNOPSIS
+    merge_on_conds()
+    thd             thread handle
+    table           table for the VIEW
+    is_cascaded     TRUE <=> merge ON expressions from underlying views
+
+  DESCRIPTION
+    This function returns the result of ANDing the ON expressions
+    of the given view and all underlying views. The ON expressions
+    of the underlying views are added only if is_cascaded is TRUE.
+
+  RETURN
+    Pointer to the built expression if there is any.
+    Otherwise and in the case of a failure NULL is returned.
+*/
+
+static Item *
+merge_on_conds(THD *thd, TABLE_LIST *table, bool is_cascaded)
+{
+  DBUG_ENTER("merge_on_conds");
+
+  Item *cond= NULL;
+  DBUG_PRINT("info", ("alias: %s", table->alias));
+  if (table->on_expr)
+    cond= table->on_expr->copy_andor_structure(thd);
+  if (!table->nested_join)
+    DBUG_RETURN(cond);
+  List_iterator<TABLE_LIST> li(table->nested_join->join_list);
+  while (TABLE_LIST *tbl= li++)
+  {
+    if (tbl->view && !is_cascaded)
+      continue;
+    cond= and_conds(cond, merge_on_conds(thd, tbl, is_cascaded));
+  }
+  DBUG_RETURN(cond);
+}
+
+
 /*
   Prepare check option expression of table
 
@@ -2001,8 +2042,8 @@ bool st_table_list::prep_where(THD *thd, Item **conds,
                       VIEW_CHECK_LOCAL option.
 
   NOTE
-    This method build check options for every call
-    (usual execution or every SP/PS call)
+    This method builds check option condition to use it later on
+    every call (usual execution or every SP/PS call).
     This method have to be called after WHERE preparation
     (st_table_list::prep_where)
 
@@ -2014,38 +2055,42 @@ bool st_table_list::prep_where(THD *thd, Item **conds,
 bool st_table_list::prep_check_option(THD *thd, uint8 check_opt_type)
 {
   DBUG_ENTER("st_table_list::prep_check_option");
+  bool is_cascaded= check_opt_type == VIEW_CHECK_CASCADED;
 
   for (TABLE_LIST *tbl= merge_underlying_list; tbl; tbl= tbl->next_local)
   {
     /* see comment of check_opt_type parameter */
-    if (tbl->view &&
-        tbl->prep_check_option(thd,
-                               ((check_opt_type == VIEW_CHECK_CASCADED) ?
+    if (tbl->view && tbl->prep_check_option(thd, (is_cascaded ?
                                                   VIEW_CHECK_CASCADED :
                                                   VIEW_CHECK_NONE)))
-    {
       DBUG_RETURN(TRUE);
   }
-  }
 
-  if (check_opt_type)
+  if (check_opt_type && !check_option_processed)
   {
-    Item *item= 0;
+    Query_arena *arena= thd->stmt_arena, backup;
+    arena= thd->activate_stmt_arena_if_needed(&backup);  // For easier test
+
     if (where)
     {
       DBUG_ASSERT(where->fixed);
-      item= where->copy_andor_structure(thd);
+      check_option= where->copy_andor_structure(thd);
     }
-    if (check_opt_type == VIEW_CHECK_CASCADED)
+    if (is_cascaded)
     {
       for (TABLE_LIST *tbl= merge_underlying_list; tbl; tbl= tbl->next_local)
       {
         if (tbl->check_option)
-          item= and_conds(item, tbl->check_option);
+          check_option= and_conds(check_option, tbl->check_option);
       }
     }
-    if (item)
-      thd->change_item_tree(&check_option, item);
+    check_option= and_conds(check_option,
+                            merge_on_conds(thd, this, is_cascaded));
+
+    if (arena)
+      thd->restore_active_arena(arena, &backup);
+    check_option_processed= TRUE;
+
   }
 
   if (check_option)
@@ -2150,7 +2195,7 @@ void st_table_list::cleanup_items()
   check CHECK OPTION condition
 
   SYNOPSIS
-    check_option()
+    st_table_list::view_check_option()
     ignore_failure ignore check option fail
 
   RETURN

sql/table.h

@@ -685,6 +685,8 @@ typedef struct st_table_list
   bool          compact_view_format;    /* Use compact format for SHOW CREATE VIEW */
   /* view where processed */
   bool          where_processed;
+  /* TRUE <=> VIEW CHECK OPTION expression has been processed */
+  bool          check_option_processed;
   /* FRMTYPE_ERROR if any type is acceptable */
   enum frm_type_enum required_type;
   char		timestamp_buffer[20];	/* buffer for timestamp (19+1) */