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Fixed valgrind error when storing db_name_length in query_cache.

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- Changed storage to be 2 bytes instead of sizeof(size_t) (simple optimization)
- Fixed bug when using query_cache_strip_comments and query that started with '('
- Fixed DBUG_PRINT() that used wrong (not initialized) variables.


mysql-test/mysql-test-run.pl:
  Added some space to make output more readable.
mysql-test/r/query_cache.result:
  Updated test results
mysql-test/t/query_cache.test:
  Added test with query_cache_strip_comments
sql/mysql_priv.h:
  Added QUERY_CACHE_DB_LENGTH_SIZE
sql/sql_cache.cc:
  Fixed bug when using query_cache_strip_comments and query that started with '('
  Store db length in 2 characters instead of size_t.
  Get db length from correct position (earlier we had an error when query started with ' ')
  Fixed DBUG_PRINT() that used wrong (not initialized) variables.
This commit is contained in:
Michael Widenius
2011-12-13 14:00:20 +02:00
parent 63d32c115d
commit b653115c8e
7 changed files with 81 additions and 37 deletions
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10
sql/sql_parse.cc
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@ -508,10 +508,10 @@ static void handle_bootstrap_impl(THD *thd)
query= (char *) thd->memdup_w_gap(buff, length + 1,
thd->db_length + 1 +
QUERY_CACHE_DB_LENGTH_SIZE +
QUERY_CACHE_FLAGS_SIZE);
size_t db_len= 0;
memcpy(query + length + 1, (char *) &db_len, sizeof(size_t));
thd->set_query(query, length);
int2store(query + length + 1, 0); // No db in bootstrap
DBUG_PRINT("query",("%-.4096s", thd->query()));
#if defined(ENABLED_PROFILING) && defined(COMMUNITY_SERVER)
thd->profiling.start_new_query();
@ -1880,7 +1880,8 @@ bool alloc_query(THD *thd, const char *packet, uint packet_length)
*/
if (! (query= (char*) thd->memdup_w_gap(packet,
packet_length,
1 + sizeof(size_t) + thd->db_length +
1 + thd->db_length +
QUERY_CACHE_DB_LENGTH_SIZE +
QUERY_CACHE_FLAGS_SIZE)))
return TRUE;
query[packet_length]= '\0';
@ -1889,8 +1890,7 @@ bool alloc_query(THD *thd, const char *packet, uint packet_length)
also store this length, in case current database is changed during
execution. We might need to reallocate the 'query' buffer
*/
char *len_pos = (query + packet_length + 1);
memcpy(len_pos, (char *) &thd->db_length, sizeof(size_t));
int2store(query + packet_length + 1, thd->db_length);
thd->set_query(query, packet_length);