merge

4 files changed, 91 insertions, 14 deletions

diff --git a/sql/mysql_priv.h b/sql/mysql_priv.h
index b084a8b5264..bd2f31fbe1d 100644
--- a/sql/mysql_priv.h
+++ b/sql/mysql_priv.h
@@ -1228,6 +1228,11 @@ bool mysql_handle_derived(LEX *lex, bool (*processor)(THD *thd,
                                                       TABLE_LIST *table));
 bool mysql_derived_prepare(THD *thd, LEX *lex, TABLE_LIST *t);
 bool mysql_derived_filling(THD *thd, LEX *lex, TABLE_LIST *t);
+bool check_table_file_presence(char *old_path, char *path,
+                               const char *db,
+                               const char *table_name,
+                               const char *alias,
+                               bool issue_error);
 Field *create_tmp_field(THD *thd, TABLE *table,Item *item, Item::Type type,
 			Item ***copy_func, Field **from_field,
                         Field **def_field,
diff --git a/sql/sql_rename.cc b/sql/sql_rename.cc
index df7054c94d0..81c6e3ad4be 100644
--- a/sql/sql_rename.cc
+++ b/sql/sql_rename.cc
@@ -245,7 +245,7 @@ do_rename(THD *thd, TABLE_LIST *ren_table, char *new_db, char *new_table_name,
           char *new_table_alias, bool skip_error)
 {
   int rc= 1;
-  char name[FN_REFLEN + 1];
+  char new_name[FN_REFLEN + 1], old_name[FN_REFLEN + 1];
   const char *new_alias, *old_alias;
   frm_type_enum frm_type;
   enum legacy_db_type table_type;
@@ -264,17 +264,17 @@ do_rename(THD *thd, TABLE_LIST *ren_table, char *new_db, char *new_table_name,
   }
   DBUG_ASSERT(new_alias);
 
-  build_table_filename(name, sizeof(name) - 1,
+  build_table_filename(new_name, sizeof(new_name) - 1,
                        new_db, new_alias, reg_ext, 0);
-  if (!access(name,F_OK))
+  build_table_filename(old_name, sizeof(old_name) - 1,
+                       ren_table->db, old_alias, reg_ext, 0);
+  if (check_table_file_presence(old_name,
+                                new_name, new_db, new_alias, new_alias, TRUE))
   {
-    my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_alias);
     DBUG_RETURN(1);			// This can't be skipped
   }
-  build_table_filename(name, sizeof(name) - 1,
-                       ren_table->db, old_alias, reg_ext, 0);
 
-  frm_type= mysql_frm_type(thd, name, &table_type);
+  frm_type= mysql_frm_type(thd, old_name, &table_type);
   switch (frm_type)
   {
     case FRMTYPE_TABLE:
@@ -319,7 +319,7 @@ do_rename(THD *thd, TABLE_LIST *ren_table, char *new_db, char *new_table_name,
     default:
       DBUG_ASSERT(0); // should never happen
     case FRMTYPE_ERROR:
-      my_error(ER_FILE_NOT_FOUND, MYF(0), name, my_errno);
+      my_error(ER_FILE_NOT_FOUND, MYF(0), old_name, my_errno);
       break;
   }
   if (rc && !skip_error)
diff --git a/sql/sql_show.cc b/sql/sql_show.cc
index 9a023daf1ff..e10488cb87c 100644
--- a/sql/sql_show.cc
+++ b/sql/sql_show.cc
@@ -3794,9 +3794,15 @@ int get_all_tables(THD *thd, TABLE_LIST *tables, COND *cond)
   it.rewind(); /* To get access to new elements in basis list */
   while ((db_name= it++))
   {
-    /* db_name can be changed in make_table_list() func */
-    LEX_STRING orig_db_name= *db_name;
+    LEX_STRING orig_db_name;
 
+    /*
+      db_name can be changed in make_table_list() func.
+      We need copy of db_name because it can change case.
+    */
+    if (!thd->make_lex_string(&orig_db_name, db_name->str,
+                              db_name->length, FALSE))
+      goto err;
 #ifndef NO_EMBEDDED_ACCESS_CHECKS
     if (!(check_access(thd,SELECT_ACL, db_name->str, 
                        &thd->col_access, 0, 1, with_i_schema) ||
diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index 2697155df86..c7c05349e39 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -3658,6 +3658,68 @@ static inline int write_create_table_bin_log(THD *thd,
 }
 
 
+/**
+  Check that there is no frm file for given table
+
+  @param old_path        path to the old frm file
+  @param path            path to the frm file in new encoding
+  @param db              database name
+  @param table_name      table name
+  @param alias           table name for error message (for new encoding)
+  @param issue_error     should we issue error messages
+
+  @retval FALSE there is no frm file
+  @retval TRUE  there is frm file
+*/
+
+bool check_table_file_presence(char *old_path,
+                               char *path,
+                               const char *db,
+                               const char *table_name,
+                               const char *alias,
+                               bool issue_error)
+{
+  if (!access(path,F_OK))
+  {
+    if (issue_error)
+      my_error(ER_TABLE_EXISTS_ERROR,MYF(0),alias);
+    return TRUE;
+  }
+  {
+    /*
+      Check if file of the table in 5.0 file name encoding exists.
+
+      Except case when it is the same table.
+    */
+    char tbl50[FN_REFLEN];
+#ifdef _WIN32
+    if (check_if_legal_tablename(table_name) != 0)
+    {
+      /*
+       Check for reserved device names for which access() returns 0
+       (CON, AUX etc).
+      */
+      return FALSE;
+    }
+#endif
+    strxmov(tbl50, mysql_data_home, "/", db, "/", table_name, NullS);
+    fn_format(tbl50, tbl50, "", reg_ext, MY_UNPACK_FILENAME);
+    if (!access(tbl50, F_OK) &&
+        (old_path == NULL ||
+         strcmp(old_path, tbl50) != 0))
+    {
+      if (issue_error)
+      {
+        strxmov(tbl50, MYSQL50_TABLE_NAME_PREFIX, table_name, NullS);
+        my_error(ER_TABLE_EXISTS_ERROR, MYF(0), tbl50);
+      }
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+
+
 /*
   Create a table
 
@@ -3943,11 +4005,12 @@ bool mysql_create_table_no_lock(THD *thd,
   VOID(pthread_mutex_lock(&LOCK_open));
   if (!internal_tmp_table && !(create_info->options & HA_LEX_CREATE_TMP_TABLE))
   {
-    if (!access(path,F_OK))
+    if (check_table_file_presence(NULL, path, db, table_name, table_name,
+                                  !(create_info->options &
+                                    HA_LEX_CREATE_IF_NOT_EXISTS)))
     {
       if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
         goto warn;
-      my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name);
       goto unlock_and_end;
     }
     /*
@@ -6604,6 +6667,7 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
   TABLE *table, *new_table= 0, *name_lock= 0;
   int error= 0;
   char tmp_name[80],old_name[32],new_name_buff[FN_REFLEN + 1];
+  char old_name_buff[FN_REFLEN + 1];
   char new_alias_buff[FN_REFLEN], *table_name, *db, *new_alias, *alias;
   char index_file[FN_REFLEN], data_file[FN_REFLEN];
   char path[FN_REFLEN + 1];
@@ -6833,10 +6897,12 @@ view_err:
 
         build_table_filename(new_name_buff, sizeof(new_name_buff) - 1,
                              new_db, new_name_buff, reg_ext, 0);
-        if (!access(new_name_buff, F_OK))
+        build_table_filename(old_name_buff, sizeof(old_name_buff) - 1,
+                             db, table_name, reg_ext, 0);
+        if (check_table_file_presence(old_name_buff, new_name_buff, new_db,
+                                      new_name, new_alias, TRUE))
 	{
 	  /* Table will be closed in do_command() */
-	  my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_alias);
           goto err;
 	}
       }