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Follow-up of a discussion on dev-docs@ :

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Don't show PSEUDO_THREAD_ID in SHOW VARIABLES because:
- we don't want people to discover this variable as it could never do good to
set it (it was designed for use by mysqlbinlog only, so that a thread can have
several temp tables of the same name at the same time)
- if we show it in SHOW VARIABLES, Mysql Administrator will display it and
this will force us to put a description, so all MySQL Administrator user
will be aware of this variable, some may have the idea to set it with a SET
command, and then it will cause bad things.
The variable is still settable, and still visible with SELECT @@.


sql/set_var.cc:
  Don't show PSEUDO_THREAD_ID in SHOW VARIABLES because:
  - we don't want people to discover this variable as it could never do good to
  set it (it was designed for use by mysqlbinlog only, so that a thread can have
  several temp tables of the same name at the same time)
  - if we show it in SHOW VARIABLES, Mysql Administrator will display it and
  this will force us to put a description, so all MySQL Administrator user
  will be aware of this variable, some may have the idea to set it with a SET
  command, and then it will cause bad things.
  The variable is still settable, and still visible with SELECT @@.
This commit is contained in:
unknown 2004-02-10 15:14:48 +01:00
parent d5b3cb44b9
commit 757c8c8a62
1 changed files with 0 additions and 1 deletions
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sql/set_var.cc
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@ -695,7 +695,6 @@ struct show_var_st init_vars[]= {
{"port", (char*) &mysqld_port, SHOW_INT},
{"protocol_version", (char*) &protocol_version, SHOW_INT},
{sys_preload_buff_size.name, (char*) &sys_preload_buff_size, SHOW_SYS},
{sys_pseudo_thread_id.name, (char*) &sys_pseudo_thread_id, SHOW_SYS},
{sys_query_alloc_block_size.name, (char*) &sys_query_alloc_block_size,
SHOW_SYS},
#ifdef HAVE_QUERY_CACHE