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A patch for Bug#34820: log_output can be set to illegal value.

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We have "set" variables, which can accept empty values
(like sql_mode), and which can not (like log_output). The problem
was that the code does not distinguish them and allow empty
values for every set variable.

The fix is to introduce an attribute of a set variable telling
whether it can accept empty values.


mysql-test/r/variables.result:
  Update result file.
mysql-test/t/variables.test:
  A test case for Bug#34820: log_output can be set to illegal value.
sql/set_var.cc:
  Don't allow empty values if it is prohibitted.
sql/set_var.h:
  Add a flag (m_allow_empty_value) telling if an empty value is
  acceptable for this variable.
This commit is contained in:
unknown
2008-03-28 18:10:04 +03:00
parent 1abfb6e040
commit fba9e7c878
4 changed files with 63 additions and 7 deletions
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10
mysql-test/r/variables.result
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@ -1014,3 +1014,13 @@ Variable_name='table_lock_wait_timeout';
Variable_name Value
table_definition_cache #
table_lock_wait_timeout #
# --
# -- Bug#34820: log_output can be set to illegal value.
# --
SET GLOBAL log_output = '';
ERROR 42000: Variable 'log_output' can't be set to the value of ''
SET GLOBAL log_output = 0;
ERROR 42000: Variable 'log_output' can't be set to the value of '0'
# -- End of Bug#34820.