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

into lmy002.wdf.sap.corp:/home/georg/work/mysql/bugs/mysql-5.0-master


mysql-test/r/view.result:
  Auto merged
mysql-test/t/view.test:
  Auto merged
sql/sql_view.cc:
  Auto merged

mysql-test/r/view.result

@@ -845,6 +845,15 @@ select * from v1;
 cast(1 as char(3))
 1
 drop view v1;
+create table t1 (a int);
+create view v1 as select a from t1;
+create database seconddb;
+rename table v1 to seconddb.v1;
+ERROR HY000: Changing schema from 'test' to 'seconddb' is not allowed.
+rename table v1 to v2;
+drop table t1;
+drop view v2;
+drop database seconddb;
 create view v1 as select 'a',1;
 create view v2 as select * from v1 union all select * from v1;
 create view v3 as select * from v2 where 1 = (select `1` from v2);

mysql-test/t/view.test

@@ -785,6 +785,19 @@ show create view v1;
 select * from v1;
 drop view v1;
 
+#
+# renaming views
+#
+create table t1 (a int);
+create view v1 as select a from t1;
+create database seconddb;
+-- error 1450
+rename table v1 to seconddb.v1;
+rename table v1 to v2;
+drop table t1;
+drop view v2;
+drop database seconddb;
+
 #
 # bug handling from VIEWs
 #

sql/parse_file.cc

@@ -333,6 +333,59 @@ sql_create_definition_file(const LEX_STRING *dir, const LEX_STRING *file_name,
   DBUG_RETURN(TRUE);
 }
 
+/*
+  Renames a frm file (including backups) in same schema
+
+  SYNOPSIS
+    rename_in_schema_file
+    schema            name of given schema           
+    old_name          original file name
+    new_name          new file name
+    revision          revision number
+    num_view_backups  number of backups
+
+  RETURN
+    0 - OK 
+    1 - Error (only if renaming of frm failed)
+
+*/
+my_bool rename_in_schema_file(const char *schema, const char *old_name, 
+                              const char *new_name, ulonglong revision, 
+                              uint num_view_backups)
+{
+  char old_path[FN_REFLEN], new_path[FN_REFLEN], arc_path[FN_REFLEN];
+
+  strxnmov(old_path, FN_REFLEN, mysql_data_home, "/", schema, "/",
+           old_name, reg_ext, NullS);
+  (void) unpack_filename(old_path, old_path);
+
+  strxnmov(new_path, FN_REFLEN, mysql_data_home, "/", schema, "/",
+           new_name, reg_ext, NullS);
+  (void) unpack_filename(new_path, new_path);
+
+  if (my_rename(old_path, new_path, MYF(MY_WME)))
+    return 1;
+
+  /* check if arc_dir exists */
+  strxnmov(arc_path, FN_REFLEN, mysql_data_home, "/", schema, "/arc", NullS);
+  (void) unpack_filename(arc_path, arc_path);
+  
+  if (revision > 0 && !access(arc_path, F_OK))
+  {
+    ulonglong limit= (revision > num_view_backups) ? revision - num_view_backups : 0;
+    while (revision > limit) {
+      my_snprintf(old_path, FN_REFLEN, "%s/%s%s-%04lu",
+		  arc_path, old_name, reg_ext, (ulong)revision);
+      (void) unpack_filename(old_path, old_path);
+      my_snprintf(new_path, FN_REFLEN, "%s/%s%s-%04lu",
+		  arc_path, new_name, reg_ext, (ulong)revision);
+      (void) unpack_filename(new_path, new_path);
+      my_rename(old_path, new_path, MYF(0));
+      revision--;
+    }
+  }
+  return 0;
+}
 
 /*
   Prepare frm to parse (read to memory)

sql/parse_file.h

@@ -48,6 +48,9 @@ my_bool
 sql_create_definition_file(const LEX_STRING *dir, const  LEX_STRING *file_name,
 			   const LEX_STRING *type,
 			   gptr base, File_option *parameters, uint versions);
+my_bool rename_in_schema_file(const char *schema, const char *old_name, 
+                              const char *new_name, ulonglong revision, 
+                              uint num_view_backups);
 
 class File_parser: public Sql_alloc
 {

sql/share/errmsg.txt

@@ -5413,3 +5413,5 @@ ER_VIEW_OTHER_USER
         eng "You need the SUPER privilege for creation view with %-.64s@%-.64s definer"
 ER_NO_SUCH_USER
         eng "There is not %-.64s@%-.64s registered"
+ER_FORBID_SCHEMA_CHANGE
+	eng "Changing schema from '%-.64s' to '%-.64s' is not allowed."

sql/sql_rename.cc

@@ -133,11 +133,12 @@ static TABLE_LIST *
 rename_tables(THD *thd, TABLE_LIST *table_list, bool skip_error)
 {
   TABLE_LIST *ren_table,*new_table;
+  frm_type_enum frm_type;
   DBUG_ENTER("rename_tables");
 
   for (ren_table= table_list; ren_table; ren_table= new_table->next_local)
   {
-    db_type table_type;
+    int rc= 1;
     char name[FN_REFLEN];
     const char *new_alias, *old_alias;
 
@@ -164,19 +165,36 @@ rename_tables(THD *thd, TABLE_LIST *table_list, bool skip_error)
 	    ren_table->db, old_alias,
 	    reg_ext);
     unpack_filename(name, name);
-    if ((table_type=get_table_type(thd, name)) == DB_TYPE_UNKNOWN)
+
+    frm_type= mysql_frm_type(name);
+    switch (frm_type)
+    {
+      case FRMTYPE_TABLE:
       {
+        db_type table_type;
+        if ((table_type= get_table_type(thd, name)) == DB_TYPE_UNKNOWN) 
           my_error(ER_FILE_NOT_FOUND, MYF(0), name, my_errno);
-      if (!skip_error)
-	DBUG_RETURN(ren_table);
+        else
+          rc= mysql_rename_table(table_type, ren_table->db, old_alias,
+                                 new_table->db, new_alias);
+        break;
       }
-    else if (mysql_rename_table(table_type,
-				ren_table->db, old_alias,
-				new_table->db, new_alias))
-    {
-      if (!skip_error)
-	DBUG_RETURN(ren_table);
+      case FRMTYPE_VIEW:
+        /* change of schema is not allowed */
+        if (strcmp(ren_table->db, new_table->db))
+          my_error(ER_FORBID_SCHEMA_CHANGE, MYF(0), ren_table->db, 
+                   new_table->db);
+        else
+          rc= mysql_rename_view(thd, new_alias, ren_table);
+        break;
+      default:
+        DBUG_ASSERT(0); // should never happen
+      case FRMTYPE_ERROR:
+        my_error(ER_FILE_NOT_FOUND, MYF(0), name, my_errno);
+        break;
     }
+    if (rc && !skip_error)
+      DBUG_RETURN(ren_table);
   }
   DBUG_RETURN(0);
 }

sql/sql_view.cc

@@ -479,8 +479,12 @@ bool mysql_create_view(THD *thd,
 
 /* index of revision number in following table */
 static const int revision_number_position= 8;
+/* index of source */
+static const int source_number_position= 11;
 /* index of last required parameter for making view */
 static const int required_view_parameters= 10;
+/* number of backups */
+static const int num_view_backups= 3;
 
 /*
   table of VIEW .frm field descriptors
@@ -708,7 +712,7 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
   }
 
   if (sql_create_definition_file(&dir, &file, view_file_type,
-				 (gptr)view, view_parameters, 3))
+				 (gptr)view, view_parameters, num_view_backups))
   {
     DBUG_RETURN(thd->net.report_error? -1 : 1);
   }
@@ -1165,7 +1169,7 @@ frm_type_enum mysql_frm_type(char *path)
   int length;
   DBUG_ENTER("mysql_frm_type");
 
-  if ((file= my_open(path, O_RDONLY | O_SHARE, MYF(MY_WME))) < 0)
+  if ((file= my_open(path, O_RDONLY | O_SHARE, MYF(0))) < 0)
   {
     DBUG_RETURN(FRMTYPE_ERROR);
   }
@@ -1369,3 +1373,77 @@ int view_checksum(THD *thd, TABLE_LIST *view)
           HA_ADMIN_WRONG_CHECKSUM :
           HA_ADMIN_OK);
 }
+
+/*
+  rename view
+
+  Synopsis:
+    renames a view
+
+  Parameters:
+    thd        thread handler
+    new_name   new name of view
+    view       view
+
+  Return values:
+    FALSE      Ok 
+    TRUE       Error
+*/
+bool
+mysql_rename_view(THD *thd,
+		   const char *new_name,
+           TABLE_LIST *view)
+{
+  LEX_STRING pathstr, file;
+  File_parser *parser;
+  char view_path[FN_REFLEN];
+
+  DBUG_ENTER("mysql_rename_view");
+
+  strxnmov(view_path, FN_REFLEN, mysql_data_home, "/", view->db, "/",
+           view->table_name, reg_ext, NullS);
+  (void) unpack_filename(view_path, view_path);
+
+  pathstr.str= (char *)view_path;
+  pathstr.length= strlen(view_path);
+
+  if ((parser= sql_parse_prepare(&pathstr, thd->mem_root, 1)) && 
+       is_equal(&view_type, parser->type())) {
+    char dir_buff[FN_REFLEN], file_buff[FN_REFLEN];
+
+    /* get view definition and source */
+    if (mysql_make_view(parser, view) ||
+        parser->parse((gptr)view, thd->mem_root,
+                      view_parameters + source_number_position, 1))
+      DBUG_RETURN(1);
+
+    /* rename view and it's backups */
+    if (rename_in_schema_file(view->db, view->table_name, new_name, 
+                              view->revision - 1, num_view_backups))
+      DBUG_RETURN(1);
+
+    strxnmov(dir_buff, FN_REFLEN, mysql_data_home, "/", view->db, "/", NullS);
+    (void) unpack_filename(dir_buff, dir_buff);
+
+    pathstr.str=    (char*)dir_buff;
+    pathstr.length= strlen(dir_buff);
+
+    file.str= file_buff;
+    file.length= (strxnmov(file_buff, FN_REFLEN, new_name, reg_ext, NullS) 
+                  - file_buff);
+
+    if (sql_create_definition_file(&pathstr, &file, view_file_type,
+      (gptr)view, view_parameters, num_view_backups)) {
+      /* restore renamed view in case of error */
+      rename_in_schema_file(view->db, new_name, view->table_name, 
+                             view->revision - 1, num_view_backups);
+      DBUG_RETURN(1);
+    }
+  } else
+    DBUG_RETURN(1);  
+
+  /* remove cache entries */
+  query_cache_invalidate3(thd, view, 0);
+  sp_cache_invalidate();
+  DBUG_RETURN(0);
+}

sql/sql_view.h

@@ -34,6 +34,7 @@ int view_checksum(THD *thd, TABLE_LIST *view);
 extern TYPELIB updatable_views_with_limit_typelib;
 
 bool check_duplicate_names(List<Item>& item_list, bool gen_unique_view_names);
+bool mysql_rename_view(THD *thd, const char *new_name, TABLE_LIST *view);
 
 #define VIEW_ANY_ACL (SELECT_ACL | UPDATE_ACL | INSERT_ACL | DELETE_ACL)