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query cache sysvar fixes

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sql/share/errmsg-utf8.txt:
  correct the error message, as query_cache_type variable is not read-ony anymore
sql/sql_cache.cc:
  the caller should verify that query cache resize
  is possible, before trying it
sql/sys_vars.cc:
  * test if qc resize is possible in the sysvar on_check() funntion,
    not in the on_update() function.
  * use the error message that better describes the problem
This commit is contained in:
Sergei Golubchik
2012-01-16 21:06:23 +01:00
parent baca1a40e9
commit 2ec0f46b88
3 changed files with 15 additions and 4 deletions
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sql/sql_cache.cc
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@ -1292,6 +1292,7 @@ ulong Query_cache::resize(ulong query_cache_size_arg)
if (global_system_variables.query_cache_type == 0)
{
DBUG_ASSERT(query_cache_size_arg == 0);
if (query_cache_size_arg != 0)
my_error(ER_QUERY_CACHE_IS_DISABLED, MYF(0));
DBUG_RETURN(0);