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| author | Anirudh Mangipudi <anirudh.mangipudi@oracle.com> | 2013-02-18 19:13:06 +0530 |
|---|---|---|
| committer | Anirudh Mangipudi <anirudh.mangipudi@oracle.com> | 2013-02-18 19:13:06 +0530 |
| commit | 4061d719ec81d366ec054990c0e1850e830046fc (patch) | |
| tree | ce0cf3df86081d9ee313621b23492e3473d466f8 /sql/sys_vars.cc | |
| parent | f144e0fead306c31a4bf3767dad6efd4b404afbd (diff) | |
| download | mariadb-git-4061d719ec81d366ec054990c0e1850e830046fc.tar.gz | |
Bug #12546953 "SHOW VARIABLES LIKE 'DATADIR';" RETURN EMPTY.
Problem:
===========================================================
If mysqld daemon is started without a --datadir option
option, and we issue the SHOW VARIABLES LIKE 'DATADIR';SQL command
at the client it returns an empty path. This is because
mysql_real_data_home_ptr is being reset to NULL by Sys_var_charptr
constructor call when the datadir is not given either through
configuration file (no-defaults) or through mysqld parameters.
Solution:
===========================================================
mysql_real_data_home is an array which stores the path of the datadir
and mysql_real_data_home_ptr is the pointer to it. The pointer is
being set to NULL at the Sys_datadir, which is of type Sys_var_charptr,
constructor call. This is because at Sys_datadir call the def_val
parameter was being passed with DEFAULT(0) which is now replaced with
DEFAULT(mysql_real_data_home). The patch has been tested manually as it
is not possible to start mtr without a default config file.
Diffstat (limited to 'sql/sys_vars.cc')
| -rw-r--r-- | sql/sys_vars.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc index 9e79cdcb6f3..2430a54ffd7 100644 --- a/sql/sys_vars.cc +++ b/sql/sys_vars.cc @@ -659,7 +659,7 @@ static Sys_var_ulong Sys_connect_timeout( static Sys_var_charptr Sys_datadir( "datadir", "Path to the database root directory", READ_ONLY GLOBAL_VAR(mysql_real_data_home_ptr), - CMD_LINE(REQUIRED_ARG, 'h'), IN_FS_CHARSET, DEFAULT(0)); + CMD_LINE(REQUIRED_ARG, 'h'), IN_FS_CHARSET, DEFAULT(mysql_real_data_home)); #ifndef DBUG_OFF static Sys_var_dbug Sys_dbug( |