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Code Activity

invalidation of locking for write tables (BUG#2693)

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fixed linking query_prealloc_size to query cache presence


mysql-test/r/query_cache.result:
  test of QC invalidation by LOCK command
mysql-test/t/query_cache.test:
  test of QC invalidation by LOCK command
sql/mysqld.cc:
  new variable query_cache_wlock_invalidate
  fixed query_prealloc_size with QC absence
sql/set_var.cc:
  new variable query_cache_wlock_invalidate
sql/sql_cache.cc:
  new method for table invalidation
sql/sql_cache.h:
  new method for table invalidation
sql/sql_class.h:
  new variable query_cache_wlock_invalidate
sql/sql_parse.cc:
  layout fixed
This commit is contained in:
unknown
2004-03-04 18:32:55 +02:00
parent 53368efea3
commit d4f43e511c
8 changed files with 82 additions and 4 deletions
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31
sql/sql_cache.cc
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@ -1090,6 +1090,37 @@ void Query_cache::invalidate(CHANGED_TABLE_LIST *tables_used)
DBUG_VOID_RETURN;
}
/*
Invalidate locked for write
SYNOPSIS
Query_cache::invalidate_locked_for_write()
tables_used - table list
NOTE
can be used only for opened tables
*/
void Query_cache::invalidate_locked_for_write(TABLE_LIST *tables_used)
{
DBUG_ENTER("Query_cache::invalidate (changed table list)");
if (query_cache_size > 0 && tables_used)
{
STRUCT_LOCK(&structure_guard_mutex);
if (query_cache_size > 0)
{
DUMP(this);
for (; tables_used; tables_used= tables_used->next)
{
if (tables_used->lock_type & (TL_WRITE_LOW_PRIORITY | TL_WRITE))
invalidate_table(tables_used->table);
}
}
STRUCT_UNLOCK(&structure_guard_mutex);
}
DBUG_VOID_RETURN;
}
/*
Remove all cached queries that uses the given table
*/