WL#4030 (Deprecate RENAME DATABASE: replace with ALTER DATABASE <name>

  UPGRADE)

Bug 17565 (RENAME DATABASE destroys events)
Bug#28360 (RENAME DATABASE destroys routines)

Removed the
  RENAME DATABASE db1 TO db2
statement.

Implemented the
  ALTER DATABASE db UPGRADE DATA DIRECTORY NAME
statement, which has the same function.

client/mysqlcheck.c

@@ -539,13 +539,13 @@ static int process_all_tables_in_db(char *database)
 
 
 
-static int fix_object_name(const char *obj, const char *name)
+static int fix_table_storage_name(const char *name)
 {
   char qbuf[100 + NAME_LEN*4];
   int rc= 0;
   if (strncmp(name, "#mysql50#", 9))
     return 1;
-  sprintf(qbuf, "RENAME %s `%s` TO `%s`", obj, name, name + 9);
+  sprintf(qbuf, "RENAME TABLE `%s` TO `%s`", name, name + 9);
   if (mysql_query(sock, qbuf))
   {
     fprintf(stderr, "Failed to %s\n", qbuf);
@@ -557,6 +557,23 @@ static int fix_object_name(const char *obj, const char *name)
   return rc;
 }
 
+static int fix_database_storage_name(const char *name)
+{
+  char qbuf[100 + NAME_LEN*4];
+  int rc= 0;
+  if (strncmp(name, "#mysql50#", 9))
+    return 1;
+  sprintf(qbuf, "ALTER DATABASE `%s` UPGRADE DATA DIRECTORY NAME", name);
+  if (mysql_query(sock, qbuf))
+  {
+    fprintf(stderr, "Failed to %s\n", qbuf);
+    fprintf(stderr, "Error: %s\n", mysql_error(sock));
+    rc= 1;
+  }
+  if (verbose)
+    printf("%-50s %s\n", name, rc ? "FAILED" : "OK");
+  return rc;
+}
 
 static int process_one_db(char *database)
 {
@@ -565,7 +582,7 @@ static int process_one_db(char *database)
     int rc= 0;
     if (opt_fix_db_names && !strncmp(database,"#mysql50#", 9))
     {
-      rc= fix_object_name("DATABASE", database);
+      rc= fix_database_storage_name(database);
       database+= 9;
     }
     if (rc || !opt_fix_table_names)
@@ -620,7 +637,7 @@ static int handle_request_for_tables(char *tables, uint length)
     op= (opt_write_binlog) ? "OPTIMIZE" : "OPTIMIZE NO_WRITE_TO_BINLOG";
     break;
   case DO_UPGRADE:
-    return fix_object_name("TABLE", tables);
+    return fix_table_storage_name(tables);
   }
 
   if (!(query =(char *) my_malloc((sizeof(char)*(length+110)), MYF(MY_WME))))

mysql-test/r/create.result

@@ -1588,14 +1588,6 @@ CREATE DATABASE aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
 ERROR 42000: Incorrect database name 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
 DROP DATABASE aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
 ERROR 42000: Incorrect database name 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
-RENAME DATABASE aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa TO a;
-ERROR 42000: Unknown database 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
-RENAME DATABASE mysqltest TO aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
-ERROR 42000: Incorrect database name 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
-create database mysqltest;
-RENAME DATABASE mysqltest TO aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
-ERROR 42000: Incorrect database name 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
-drop database mysqltest;
 USE aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
 ERROR 42000: Incorrect database name 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
 SHOW CREATE DATABASE aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;

mysql-test/r/query_cache.result

@@ -1684,52 +1684,3 @@ set GLOBAL query_cache_limit=default;
 set GLOBAL query_cache_min_res_unit=default;
 set GLOBAL query_cache_size=default;
 End of 5.0 tests
-drop database if exists db1;
-drop database if exists db2;
-set GLOBAL query_cache_size=15*1024*1024;
-create database db1;
-use db1;
-create table t1(c1 int)engine=myisam;
-insert into t1(c1) values (1);
-select * from db1.t1 f;
-c1
-1
-show status like 'Qcache_queries_in_cache';
-Variable_name	Value
-Qcache_queries_in_cache	1
-rename schema db1 to db2;
-show status like 'Qcache_queries_in_cache';
-Variable_name	Value
-Qcache_queries_in_cache	0
-drop database db2;
-set global query_cache_size=default;
-drop database if exists db1;
-drop database if exists db3;
-set GLOBAL query_cache_size=15*1024*1024;
-create database db1;
-create database db3;
-use db1;
-create table t1(c1 int) engine=myisam;
-use db3;
-create table t1(c1 int) engine=myisam;
-use db1;
-insert into t1(c1) values (1);
-use mysql;
-select * from db1.t1;
-c1
-1
-select c1+1 from db1.t1;
-c1+1
-2
-select * from db3.t1;
-c1
-show status like 'Qcache_queries_in_cache';
-Variable_name	Value
-Qcache_queries_in_cache	3
-rename schema db1 to db2;
-show status like 'Qcache_queries_in_cache';
-Variable_name	Value
-Qcache_queries_in_cache	1
-drop database db2;
-drop database db3;
-End of 5.1 tests

mysql-test/r/renamedb.result

-drop database if exists testdb1;
-create database testdb1 default character set latin2;
-use testdb1;
-create table t1 (a int);
-insert into t1 values (1),(2),(3);
-show create database testdb1;
-Database	Create Database
-testdb1	CREATE DATABASE `testdb1` /*!40100 DEFAULT CHARACTER SET latin2 */
-show tables;
-Tables_in_testdb1
-t1
 rename database testdb1 to testdb2;
-show create database testdb1;
-ERROR 42000: Unknown database 'testdb1'
-show create database testdb2;
-Database	Create Database
-testdb2	CREATE DATABASE `testdb2` /*!40100 DEFAULT CHARACTER SET latin2 */
-select database();
-database()
-testdb2
-show tables;
-Tables_in_testdb2
-t1
-select a from t1 order by a;
-a
-1
-2
-3
-drop database testdb2;
-create database testdb1;
-rename database testdb1 to testdb1;
-ERROR HY000: Can't create database 'testdb1'; database exists
-drop database testdb1;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'database testdb1 to testdb2' at line 1
+ALTER DATABASE wrong UPGRADE DATA DIRECTORY NAME;
+ERROR HY000: Incorrect usage of ALTER DATABASE UPGRADE DATA DIRECTORY NAME and name
+ALTER DATABASE `#mysql41#not-supported` UPGRADE DATA DIRECTORY NAME;
+ERROR HY000: Incorrect usage of ALTER DATABASE UPGRADE DATA DIRECTORY NAME and name
+ALTER DATABASE `#mysql51#not-yet` UPGRADE DATA DIRECTORY NAME;
+ERROR HY000: Incorrect usage of ALTER DATABASE UPGRADE DATA DIRECTORY NAME and name
+ALTER DATABASE `#mysql50#` UPGRADE DATA DIRECTORY NAME;
+ERROR HY000: Incorrect usage of ALTER DATABASE UPGRADE DATA DIRECTORY NAME and name
+ALTER DATABASE `#mysql50#upgrade-me` UPGRADE DATA DIRECTORY NAME;
+ERROR 42000: Unknown database '#mysql50#upgrade-me'

mysql-test/r/sp-code.result

@@ -155,11 +155,11 @@ Pos	Instruction
 0	stmt 9 "drop temporary table if exists sudoku..."
 1	stmt 1 "create temporary table sudoku_work ( ..."
 2	stmt 1 "create temporary table sudoku_schedul..."
-3	stmt 95 "call sudoku_init()"
+3	stmt 94 "call sudoku_init()"
 4	jump_if_not 7(8) p_naive@0
 5	stmt 4 "update sudoku_work set cnt = 0 where ..."
 6	jump 8
-7	stmt 95 "call sudoku_count()"
+7	stmt 94 "call sudoku_count()"
 8	stmt 6 "insert into sudoku_schedule (row,col)..."
 9	set v_scounter@2 0
 10	set v_i@3 1

mysql-test/r/sp-error.result

@@ -1478,3 +1478,16 @@ end
 until true end repeat retry;
 end//
 ERROR 42000: LEAVE with no matching label: retry
+drop procedure if exists proc_28360;
+drop function if exists func_28360;
+CREATE PROCEDURE proc_28360()
+BEGIN
+ALTER DATABASE `#mysql50#upgrade-me` UPGRADE DATA DIRECTORY NAME;
+END//
+ERROR HY000: Can't drop or alter a DATABASE from within another stored routine
+CREATE FUNCTION func_28360() RETURNS int
+BEGIN
+ALTER DATABASE `#mysql50#upgrade-me` UPGRADE DATA DIRECTORY NAME;
+RETURN 0;
+END//
+ERROR HY000: Can't drop or alter a DATABASE from within another stored routine

mysql-test/r/upgrade.result

@@ -59,3 +59,28 @@ drop table `txu@0023p@0023p1`;
 drop table `txu#p#p1`;
 truncate t1;
 drop table t1;
+drop database if exists `tabc`;
+drop database if exists `a-b-c`;
+create database `tabc` default character set latin2;
+create table tabc.t1 (a int);
+FLUSH TABLES;
+show databases like '%a-b-c%';
+Database (%a-b-c%)
+#mysql50#a-b-c
+ALTER DATABASE `#mysql50#a-b-c` UPGRADE DATA DIRECTORY NAME;
+show databases like '%a-b-c%';
+Database (%a-b-c%)
+a-b-c
+show create database `a-b-c`;
+Database	Create Database
+a-b-c	CREATE DATABASE `a-b-c` /*!40100 DEFAULT CHARACTER SET latin2 */
+show tables in `a-b-c`;
+Tables_in_a-b-c
+t1
+show create table `a-b-c`.`t1`;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin2
+drop database `a-b-c`;
+drop database `tabc`;

mysql-test/t/create.test

@@ -1197,14 +1197,17 @@ drop table t1,t2;
 CREATE DATABASE aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
 --error 1102
 DROP DATABASE aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
---error 1049
-RENAME DATABASE aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa TO a;
---error 1102
-RENAME DATABASE mysqltest TO aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
-create database mysqltest;
---error 1102
-RENAME DATABASE mysqltest TO aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
-drop database mysqltest;
+
+# TODO: enable these tests when RENAME DATABASE is implemented.
+# --error 1049
+# RENAME DATABASE aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa TO a;
+# --error 1102
+# RENAME DATABASE mysqltest TO aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
+# create database mysqltest;
+# --error 1102
+# RENAME DATABASE mysqltest TO aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
+# drop database mysqltest;
+
 --error 1102
 USE aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
 --error 1102

mysql-test/t/query_cache.test

@@ -1293,44 +1293,42 @@ set GLOBAL query_cache_size=default;
 
 #
 # Bug #28211 RENAME DATABASE and query cache don't play nicely together
-#
---disable_warnings
-drop database if exists db1;
-drop database if exists db2;
---enable_warnings
-set GLOBAL query_cache_size=15*1024*1024;
-create database db1;
-use db1;
-create table t1(c1 int)engine=myisam;
-insert into t1(c1) values (1);
-select * from db1.t1 f;
-show status like 'Qcache_queries_in_cache';
-rename schema db1 to db2;
-show status like 'Qcache_queries_in_cache';
-drop database db2;
-set global query_cache_size=default;
-
---disable_warnings
-drop database if exists db1;
-drop database if exists db3;
---enable_warnings
-set GLOBAL query_cache_size=15*1024*1024;
-create database db1;
-create database db3;
-use db1;
-create table t1(c1 int) engine=myisam;
-use db3;
-create table t1(c1 int) engine=myisam;
-use db1;
-insert into t1(c1) values (1);
-use mysql;
-select * from db1.t1;
-select c1+1 from db1.t1;
-select * from db3.t1;
-show status like 'Qcache_queries_in_cache';
-rename schema db1 to db2;
-show status like 'Qcache_queries_in_cache';
-drop database db2;
-drop database db3;
-
---echo End of 5.1 tests
+# TODO: enable these tests when RENAME DATABASE is implemented.
+# --disable_warnings
+# drop database if exists db1;
+# drop database if exists db2;
+# --enable_warnings
+# set GLOBAL query_cache_size=15*1024*1024;
+# create database db1;
+# use db1;
+# create table t1(c1 int)engine=myisam;
+# insert into t1(c1) values (1);
+# select * from db1.t1 f;
+# show status like 'Qcache_queries_in_cache';
+# rename schema db1 to db2;
+# show status like 'Qcache_queries_in_cache';
+# drop database db2;
+# set global query_cache_size=default;
+# 
+# --disable_warnings
+# drop database if exists db1;
+# drop database if exists db3;
+# --enable_warnings
+# set GLOBAL query_cache_size=15*1024*1024;
+# create database db1;
+# create database db3;
+# use db1;
+# create table t1(c1 int) engine=myisam;
+# use db3;
+# create table t1(c1 int) engine=myisam;
+# use db1;
+# insert into t1(c1) values (1);
+# use mysql;
+# select * from db1.t1;
+# select c1+1 from db1.t1;
+# select * from db3.t1;
+# show status like 'Qcache_queries_in_cache';
+# rename schema db1 to db2;
+# show status like 'Qcache_queries_in_cache';
+# drop database db2;
+# drop database db3;

mysql-test/t/renamedb.test

---disable_warnings
-drop database if exists testdb1;
---enable_warnings
-
-create database testdb1 default character set latin2;
-use testdb1;
-create table t1 (a int);
-insert into t1 values (1),(2),(3);
-show create database testdb1;
-show tables;
-rename database testdb1 to testdb2;
---error 1049
-show create database testdb1;
-show create database testdb2;
-select database();
-show tables;
-select a from t1 order by a;
-drop database testdb2;
 
+# TODO: enable these tests when RENAME DATABASE is implemented.
+#
+# --disable_warnings
+# drop database if exists testdb1;
+# --enable_warnings
+# 
+# create database testdb1 default character set latin2;
+# use testdb1;
+# create table t1 (a int);
+# insert into t1 values (1),(2),(3);
+# show create database testdb1;
+# show tables;
+# rename database testdb1 to testdb2;
+# --error 1049
+# show create database testdb1;
+# show create database testdb2;
+# select database();
+# show tables;
+# select a from t1 order by a;
+# drop database testdb2;
+# 
 #
 # Bug#19392 Rename Database: Crash if case change
 #
-create database testdb1;
---error 1007
-rename database testdb1 to testdb1;
-drop database testdb1;
+# create database testdb1;
+# --error 1007
+# rename database testdb1 to testdb1;
+# drop database testdb1;
+
+#
+# WL#4030 (Deprecate RENAME DATABASE: replace with ALTER DATABASE <name> UPGRADE)
+#
+
+--error ER_PARSE_ERROR
+rename database testdb1 to testdb2;
+
+--error ER_WRONG_USAGE
+ALTER DATABASE wrong UPGRADE DATA DIRECTORY NAME;
+
+--error ER_WRONG_USAGE
+ALTER DATABASE `#mysql41#not-supported` UPGRADE DATA DIRECTORY NAME;
+
+--error ER_WRONG_USAGE
+ALTER DATABASE `#mysql51#not-yet` UPGRADE DATA DIRECTORY NAME;
+
+--error ER_WRONG_USAGE
+ALTER DATABASE `#mysql50#` UPGRADE DATA DIRECTORY NAME;
+
+--error ER_BAD_DB_ERROR
+ALTER DATABASE `#mysql50#upgrade-me` UPGRADE DATA DIRECTORY NAME;
+
+

mysql-test/t/sp-error.test

@@ -2150,6 +2150,34 @@ end//
 
 delimiter ;//
 
+
+#
+# Bug#28360 (RENAME DATABASE destroys routines)
+#
+
+--disable_warnings
+drop procedure if exists proc_28360;
+drop function if exists func_28360;
+--enable_warnings
+
+delimiter //;
+
+--error ER_SP_NO_DROP_SP
+CREATE PROCEDURE proc_28360()
+BEGIN
+  ALTER DATABASE `#mysql50#upgrade-me` UPGRADE DATA DIRECTORY NAME;
+END//
+
+--error ER_SP_NO_DROP_SP
+CREATE FUNCTION func_28360() RETURNS int
+BEGIN
+  ALTER DATABASE `#mysql50#upgrade-me` UPGRADE DATA DIRECTORY NAME;
+  RETURN 0;
+END//
+
+delimiter ;//
+
+
 #
 # BUG#NNNN: New bug synopsis
 #

mysql-test/t/upgrade.test

@@ -56,3 +56,34 @@ system cp $MYSQL_TEST_DIR/std_data/old_table-323.frm $MYSQLTEST_VARDIR/master-da
 truncate t1;
 drop table t1;
 
+#
+# Bug#28360 (RENAME DATABASE destroys routines)
+#
+
+
+--disable_warnings
+drop database if exists `tabc`;
+drop database if exists `a-b-c`;
+--enable_warnings
+
+create database `tabc` default character set latin2;
+create table tabc.t1 (a int);
+FLUSH TABLES;
+
+# Manually make a 5.0 database from the template
+--exec mkdir $MYSQLTEST_VARDIR/master-data/a-b-c
+--copy_file $MYSQLTEST_VARDIR/master-data/tabc/db.opt $MYSQLTEST_VARDIR/master-data/a-b-c/db.opt
+--copy_file $MYSQLTEST_VARDIR/master-data/tabc/t1.frm $MYSQLTEST_VARDIR/master-data/a-b-c/t1.frm
+--copy_file $MYSQLTEST_VARDIR/master-data/tabc/t1.MYD $MYSQLTEST_VARDIR/master-data/a-b-c/t1.MYD
+--copy_file $MYSQLTEST_VARDIR/master-data/tabc/t1.MYI $MYSQLTEST_VARDIR/master-data/a-b-c/t1.MYI
+
+show databases like '%a-b-c%';
+ALTER DATABASE `#mysql50#a-b-c` UPGRADE DATA DIRECTORY NAME;
+# The physical directory name is now a@002db@002dc, the logical name still a-b-c
+show databases like '%a-b-c%';
+show create database `a-b-c`;
+show tables in `a-b-c`;
+show create table `a-b-c`.`t1`;
+drop database `a-b-c`;
+drop database `tabc`;
+

sql/mysql_priv.h

@@ -923,7 +923,7 @@ void end_connection(THD *thd);
 bool mysql_create_db(THD *thd, char *db, HA_CREATE_INFO *create, bool silent);
 bool mysql_alter_db(THD *thd, const char *db, HA_CREATE_INFO *create);
 bool mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent);
-bool mysql_rename_db(THD *thd, LEX_STRING *old_db, LEX_STRING *new_db);
+bool mysql_upgrade_db(THD *thd, LEX_STRING *old_db);
 void mysql_binlog_send(THD* thd, char* log_ident, my_off_t pos, ushort flags);
 void mysql_client_binlog_statement(THD *thd);
 bool mysql_rm_table(THD *thd,TABLE_LIST *tables, my_bool if_exists,

sql/sql_db.cc

@@ -1727,41 +1727,21 @@ lock_databases(THD *thd, const char *db1, uint length1,
 }
 
 
-/*
-  Rename database.
-
-  SYNOPSIS
-    mysql_rename_db()
-    thd                 Thread handler
-    olddb               Old database name
-    newdb               New database name
-
-  DESCRIPTION
-   This function is invoked whenever a RENAME DATABASE query is executed:
-
-     RENAME DATABASE 'olddb' TO 'newdb'.
-
-  NOTES
+/**
+  Upgrade a 5.0 database.
+  This function is invoked whenever an ALTER DATABASE UPGRADE query is executed:
+    ALTER DATABASE 'olddb' UPGRADE DATA DIRECTORY NAME.
 
   If we have managed to rename (move) tables to the new database
   but something failed on a later step, then we store the
   RENAME DATABASE event in the log. mysql_rename_db() is atomic in
   the sense that it will rename all or none of the tables.
 
-  TODO:
-    - Better trigger, stored procedure, event, grant handling,
-      see the comments below.
-      NOTE: It's probably a good idea to call wait_if_global_read_lock()
-      once in mysql_rename_db(), instead of locking inside all
-      the required functions for renaming triggerts, SP, events, grants, etc.
-
-  RETURN VALUES
-    0	ok
-    1	error
+  @param thd Current thread
+  @param old_db 5.0 database name, in #mysql50#name format
+  @return 0 on success, 1 on error
 */
-
-
-bool mysql_rename_db(THD *thd, LEX_STRING *old_db, LEX_STRING *new_db)
+bool mysql_upgrade_db(THD *thd, LEX_STRING *old_db)
 {
   int error= 0, change_to_newdb= 0;
   char path[FN_REFLEN+16];
@@ -1770,11 +1750,27 @@ bool mysql_rename_db(THD *thd, LEX_STRING *old_db, LEX_STRING *new_db)
   MY_DIR *dirp;
   TABLE_LIST *table_list;
   SELECT_LEX *sl= thd->lex->current_select;
-  DBUG_ENTER("mysql_rename_db");
+  LEX_STRING new_db;
+  DBUG_ENTER("mysql_upgrade_db");
+
+  if ((old_db->length <= MYSQL50_TABLE_NAME_PREFIX_LENGTH) ||
+      (strncmp(old_db->str,
+              MYSQL50_TABLE_NAME_PREFIX,
+              MYSQL50_TABLE_NAME_PREFIX_LENGTH) != 0))
+  {
+    my_error(ER_WRONG_USAGE, MYF(0),
+             "ALTER DATABASE UPGRADE DATA DIRECTORY NAME",
+             "name");
+    DBUG_RETURN(1);
+  }
+
+  /* `#mysql50#<name>` converted to encoded `<name>` */
+  new_db.str= old_db->str + MYSQL50_TABLE_NAME_PREFIX_LENGTH;
+  new_db.length= old_db->length - MYSQL50_TABLE_NAME_PREFIX_LENGTH;
 
   if (lock_databases(thd, old_db->str, old_db->length,
-                          new_db->str, new_db->length))
-    return 1;
+                          new_db.str, new_db.length))
+    DBUG_RETURN(1);
 
   /*
     Let's remember if we should do "USE newdb" afterwards.
@@ -1798,7 +1794,7 @@ bool mysql_rename_db(THD *thd, LEX_STRING *old_db, LEX_STRING *new_db)
   }
 
   /* Step1: Create the new database */
-  if ((error= mysql_create_db(thd, new_db->str, &create_info, 1)))
+  if ((error= mysql_create_db(thd, new_db.str, &create_info, 1)))
     goto exit;
 
   /* Step2: Move tables to the new database */
@@ -1824,7 +1820,7 @@ bool mysql_rename_db(THD *thd, LEX_STRING *old_db, LEX_STRING *new_db)
                                               tname, sizeof(tname)-1);
       table_str.str= (char*) sql_memdup(tname, table_str.length + 1);
       Table_ident *old_ident= new Table_ident(thd, *old_db, table_str, 0);
-      Table_ident *new_ident= new Table_ident(thd, *new_db, table_str, 0);
+      Table_ident *new_ident= new Table_ident(thd, new_db, table_str, 0);
       if (!old_ident || !new_ident ||
           !sl->add_table_to_list(thd, old_ident, NULL,
                                  TL_OPTION_UPDATING, TL_IGNORE) ||
@@ -1854,9 +1850,9 @@ bool mysql_rename_db(THD *thd, LEX_STRING *old_db, LEX_STRING *new_db)
       It garantees we never loose any tables.
     */
     build_table_filename(path, sizeof(path)-1,
-                         new_db->str,"",MY_DB_OPT_FILE, 0);
+                         new_db.str,"",MY_DB_OPT_FILE, 0);
     my_delete(path, MYF(MY_WME));
-    length= build_table_filename(path, sizeof(path)-1, new_db->str, "", "", 0);
+    length= build_table_filename(path, sizeof(path)-1, new_db.str, "", "", 0);
     if (length && path[length-1] == FN_LIBCHAR)
       path[length-1]=0;                            // remove ending '\'
     rmdir(path);
@@ -1910,46 +1906,12 @@ bool mysql_rename_db(THD *thd, LEX_STRING *old_db, LEX_STRING *new_db)
       build_table_filename(oldname, sizeof(oldname)-1,
                            old_db->str, "", file->name, 0);
       build_table_filename(newname, sizeof(newname)-1,
-                           new_db->str, "", file->name, 0);
+                           new_db.str, "", file->name, 0);
       my_rename(oldname, newname, MYF(MY_WME));
     }
     my_dirend(dirp);
   }
 
-  /*
-    Step4: TODO: moving stored procedures in the 'proc' system table
-    We need a new function: sp_move_db_routines(thd, olddb, newdb)
-    Which will basically have the same effect with:
-    UPDATE proc SET db='newdb' WHERE db='olddb'
-    Note, for 5.0 to 5.1 upgrade purposes we don't really need it.
-
-    The biggest problem here is that we can't have a lock on LOCK_open() while
-    calling open_table() for 'proc'.
-
-    Two solutions:
-    - Start by opening the 'event' and 'proc' (and other) tables for write
-      even before creating the 'to' database.  (This will have the nice
-      effect of blocking another 'rename database' while the lock is active).
-    - Use the solution "Disable create of new tables during lock table"
-
-    For an example of how to read through all rows, see:
-    sql_help.cc::search_topics()
-  */
-
-  /*
-    Step5: TODO: moving events in the 'event' system table
-    We need a new function evex_move_db_events(thd, olddb, newdb)
-    Which will have the same effect with:
-    UPDATE event SET db='newdb' WHERE db='olddb'
-    Note, for 5.0 to 5.1 upgrade purposes we don't really need it.
-  */
-
-  /*
-    Step6: TODO: moving grants in the 'db', 'tables_priv', 'columns_priv'.
-    Update each grant table, doing the same with:
-    UPDATE system_table SET db='newdb' WHERE db='olddb'
-  */
-
   /*
     Step7: drop the old database.
     remove_db_from_cache(olddb) and query_cache_invalidate(olddb)
@@ -1968,13 +1930,13 @@ bool mysql_rename_db(THD *thd, LEX_STRING *old_db, LEX_STRING *new_db)
 
   /* Step9: Let's do "use newdb" if we renamed the current database */
   if (change_to_newdb)
-    error|= mysql_change_db(thd, new_db, FALSE);
+    error|= mysql_change_db(thd, & new_db, FALSE);
 
 exit:
   pthread_mutex_lock(&LOCK_lock_db);
   /* Remove the databases from db lock cache */
   lock_db_delete(old_db->str, old_db->length);
-  lock_db_delete(new_db->str, new_db->length);
+  lock_db_delete(new_db.str, new_db.length);
   creating_database--;
   /* Signal waiting CREATE TABLE's to continue */
   pthread_cond_signal(&COND_refresh);

sql/sql_lex.h

@@ -78,7 +78,6 @@ enum enum_sql_command {
   SQLCOM_LOAD,SQLCOM_SET_OPTION,SQLCOM_LOCK_TABLES,SQLCOM_UNLOCK_TABLES,
   SQLCOM_GRANT,
   SQLCOM_CHANGE_DB, SQLCOM_CREATE_DB, SQLCOM_DROP_DB, SQLCOM_ALTER_DB,
-  SQLCOM_RENAME_DB,
   SQLCOM_REPAIR, SQLCOM_REPLACE, SQLCOM_REPLACE_SELECT,
   SQLCOM_CREATE_FUNCTION, SQLCOM_DROP_FUNCTION,
   SQLCOM_REVOKE,SQLCOM_OPTIMIZE, SQLCOM_CHECK,
@@ -117,6 +116,7 @@ enum enum_sql_command {
   SQLCOM_CREATE_EVENT, SQLCOM_ALTER_EVENT, SQLCOM_DROP_EVENT,
   SQLCOM_SHOW_CREATE_EVENT, SQLCOM_SHOW_EVENTS,
   SQLCOM_SHOW_CREATE_TRIGGER,
+  SQLCOM_ALTER_DB_UPGRADE,
 
   /* This should be the last !!! */
 
@@ -1550,7 +1550,6 @@ typedef struct st_lex : public Query_tables_list
     required a local context, the parser pops the top-most context.
   */
   List<Name_resolution_context> context_stack;
-  List<LEX_STRING>     db_list;
 
   SQL_LIST	      proc_list, auxiliary_table_list, save_list;
   Create_field	      *last_field;

sql/sql_parse.cc

@@ -3175,12 +3175,9 @@ end_with_restore_list:
     res= mysql_rm_db(thd, lex->name.str, lex->drop_if_exists, 0);
     break;
   }
-  case SQLCOM_RENAME_DB:
+  case SQLCOM_ALTER_DB_UPGRADE:
   {
-    LEX_STRING *olddb, *newdb;
-    List_iterator <LEX_STRING> db_list(lex->db_list);
-    olddb= db_list++;
-    newdb= db_list++;
+    LEX_STRING *db= & lex->name;
     if (end_active_trans(thd))
     {
       res= 1;
@@ -3188,24 +3185,22 @@ end_with_restore_list:
     }
 #ifdef HAVE_REPLICATION
     if (thd->slave_thread && 
-       (!rpl_filter->db_ok(olddb->str) ||
-        !rpl_filter->db_ok(newdb->str) ||
-        !rpl_filter->db_ok_with_wild_table(olddb->str) ||
-        !rpl_filter->db_ok_with_wild_table(newdb->str)))
+       (!rpl_filter->db_ok(db->str) ||
+        !rpl_filter->db_ok_with_wild_table(db->str)))
     {
       res= 1;
       my_message(ER_SLAVE_IGNORED_TABLE, ER(ER_SLAVE_IGNORED_TABLE), MYF(0));
       break;
     }
 #endif
-    if (check_db_name(newdb))
+    if (check_db_name(db))
     {
-      my_error(ER_WRONG_DB_NAME, MYF(0), newdb->str);
+      my_error(ER_WRONG_DB_NAME, MYF(0), db->str);
       break;
     }
-    if (check_access(thd,ALTER_ACL,olddb->str,0,1,0,is_schema_db(olddb->str)) ||
-        check_access(thd,DROP_ACL,olddb->str,0,1,0,is_schema_db(olddb->str)) ||
-        check_access(thd,CREATE_ACL,newdb->str,0,1,0,is_schema_db(newdb->str)))
+    if (check_access(thd, ALTER_ACL, db->str, 0, 1, 0, is_schema_db(db->str)) ||
+        check_access(thd, DROP_ACL, db->str, 0, 1, 0, is_schema_db(db->str)) ||
+        check_access(thd, CREATE_ACL, db->str, 0, 1, 0, is_schema_db(db->str)))
     {
       res= 1;
       break;
@@ -3217,7 +3212,8 @@ end_with_restore_list:
                  ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));
       goto error;
     }
-    res= mysql_rename_db(thd, olddb, newdb);
+
+    res= mysql_upgrade_db(thd, db);
     if (!res)
       send_ok(thd);
     break;

sql/sql_prepare.cc

@@ -1799,7 +1799,7 @@ static bool check_prepared_statement(Prepared_statement *stmt,
   case SQLCOM_UNINSTALL_PLUGIN:
   case SQLCOM_CREATE_DB:
   case SQLCOM_DROP_DB:
-  case SQLCOM_RENAME_DB:
+  case SQLCOM_ALTER_DB_UPGRADE:
   case SQLCOM_CHECKSUM:
   case SQLCOM_CREATE_USER:
   case SQLCOM_RENAME_USER:

sql/sql_yacc.yy

@@ -1260,7 +1260,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
         clear_privileges flush_options flush_option
         equal optional_braces
         opt_mi_check_type opt_to mi_check_types normal_join
-        db_to_db table_to_table_list table_to_table opt_table_list opt_as
+        table_to_table_list table_to_table opt_table_list opt_as
         handler_rkey_function handler_read_or_scan
         single_multi table_wild_list table_wild_one opt_wild
         union_clause union_list
@@ -5400,6 +5400,17 @@ alter:
                 lex->copy_db_to(&lex->name.str, &lex->name.length))
               MYSQL_YYABORT;
           }
+        | ALTER DATABASE ident UPGRADE_SYM DATA_SYM DIRECTORY_SYM NAME_SYM
+          {
+            LEX *lex= Lex;
+            if (lex->sphead)
+            {
+              my_error(ER_SP_NO_DROP_SP, MYF(0), "DATABASE");
+              MYSQL_YYABORT;
+            }
+            lex->sql_command= SQLCOM_ALTER_DB_UPGRADE;
+            lex->name= $3;
+          }
         | ALTER PROCEDURE sp_name
           {
             LEX *lex= Lex;
@@ -6184,13 +6195,6 @@ rename:
           }
           table_to_table_list
           {}
-        | RENAME DATABASE
-          {
-            Lex->db_list.empty();
-            Lex->sql_command= SQLCOM_RENAME_DB;
-          }
-          db_to_db
-          {}
         | RENAME USER clear_privileges rename_list
           {
             Lex->sql_command = SQLCOM_RENAME_USER;
@@ -6228,18 +6232,6 @@ table_to_table:
           }
         ;
 
-db_to_db:
-          ident TO_SYM ident
-          {
-            LEX *lex=Lex;
-            if (lex->db_list.push_back((LEX_STRING*)
-                                       sql_memdup(&$1, sizeof(LEX_STRING))) ||
-                lex->db_list.push_back((LEX_STRING*)
-                                       sql_memdup(&$3, sizeof(LEX_STRING))))
-              MYSQL_YYABORT;
-          }
-        ;
-
 keycache:
           CACHE_SYM INDEX_SYM keycache_list IN_SYM key_cache_name
           {