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fixed server crash on moving query block with pointers to same table in it (BUG#988)

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removed server options
This commit is contained in:
bell@sanja.is.com.ua
2003-09-15 15:16:13 +03:00
parent 4871a35e8a
commit 702b5ad4d6
4 changed files with 120 additions and 5 deletions
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26
sql/sql_cache.cc
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@@ -2666,11 +2666,33 @@ my_bool Query_cache::move_by_type(byte **border,
relink(block, new_block, next, prev, pnext, pprev);
if (queries_blocks == block)
queries_blocks = new_block;
Query_cache_block_table *beg_of_table_table= block->table(0),
*end_of_table_table= block->table(n_tables);
byte *beg_of_new_table_table= (byte*) new_block->table(0);
for (TABLE_COUNTER_TYPE j=0; j < n_tables; j++)
{
Query_cache_block_table *block_table = new_block->table(j);
block_table->next->prev = block_table;
block_table->prev->next = block_table;
// use aligment from begining of table if 'next' is in same block
if ((beg_of_table_table <= block_table->next) &&
(block_table->next < end_of_table_table))
((Query_cache_block_table *)(beg_of_new_table_table +
(((byte*)block_table->next) -
((byte*)beg_of_table_table))))->prev=
block_table;
else
block_table->next->prev= block_table;
// use aligment from begining of table if 'prev' is in same block
if ((beg_of_table_table <= block_table->prev) &&
(block_table->prev < end_of_table_table))
((Query_cache_block_table *)(beg_of_new_table_table +
(((byte*)block_table->prev) -
((byte*)beg_of_table_table))))->next=
block_table;
else
block_table->prev->next = block_table;
}
DBUG_PRINT("qcache", ("after circle tt"));
*border += len;