diff options
Diffstat (limited to 'sql/sql_show.cc')
| -rw-r--r-- | sql/sql_show.cc | 40 |
1 files changed, 27 insertions, 13 deletions
diff --git a/sql/sql_show.cc b/sql/sql_show.cc index f61c5677ced..5eb2d911926 100644 --- a/sql/sql_show.cc +++ b/sql/sql_show.cc @@ -5275,6 +5275,29 @@ bool store_schema_schemata(THD* thd, TABLE *table, LEX_CSTRING *db_name, } +/* + Check if the specified database exists on disk. + + @param dbname - the database name + @retval true - on error, the database directory does not exists + @retval false - on success, the database directory exists +*/ +static bool verify_database_directory_exists(const LEX_CSTRING &dbname) +{ + DBUG_ENTER("verify_database_directory_exists"); + char path[FN_REFLEN + 16]; + uint path_len; + MY_STAT stat_info; + if (!dbname.str[0]) + DBUG_RETURN(true); // Empty database name: does not exist. + path_len= build_table_filename(path, sizeof(path) - 1, dbname.str, "", "", 0); + path[path_len - 1]= 0; + if (!mysql_file_stat(key_file_misc, path, &stat_info, MYF(0))) + DBUG_RETURN(true); // The database directory was not found: does not exist. + DBUG_RETURN(false); // The database directory was found. +} + + int fill_schema_schemata(THD *thd, TABLE_LIST *tables, COND *cond) { /* @@ -5303,19 +5326,10 @@ int fill_schema_schemata(THD *thd, TABLE_LIST *tables, COND *cond) If we have lookup db value we should check that the database exists */ if(lookup_field_vals.db_value.str && !lookup_field_vals.wild_db_value && - db_names.at(0) != &INFORMATION_SCHEMA_NAME) - { - char path[FN_REFLEN+16]; - uint path_len; - MY_STAT stat_info; - if (!lookup_field_vals.db_value.str[0]) - DBUG_RETURN(0); - path_len= build_table_filename(path, sizeof(path) - 1, - lookup_field_vals.db_value.str, "", "", 0); - path[path_len-1]= 0; - if (!mysql_file_stat(key_file_misc, path, &stat_info, MYF(0))) - DBUG_RETURN(0); - } + (!db_names.elements() /* The database name was too long */|| + (db_names.at(0) != &INFORMATION_SCHEMA_NAME && + verify_database_directory_exists(lookup_field_vals.db_value)))) + DBUG_RETURN(0); for (size_t i=0; i < db_names.elements(); i++) { |