bug #16017 (memory leaks in embedded server)

There actually was 3 different problems -
hash_user_connections wasn't cleaned
one strdupped database name wasn't freed
and stmt->mem_root wasn't cleaned as it was
replased with mysql->field_alloc for result
For the last one - i made the library using stmt's
fields to store result if it's the case.


include/mysql.h:
  statement pointer added to the advanced_command to be checked in
  embedded server
include/sql_common.h:
  stmt added to the cli_advanced_command interface
libmysql/libmysql.c:
  stmt pointer now sent to advanced_command
libmysqld/embedded_priv.h:
  it's enough to send database name to check_embedded_connection
libmysqld/lib_sql.cc:
  Now we store result directly in the MYSQL_STMT structure to
  avoid extra copying
libmysqld/libmysqld.c:
  it's enough to only send database pointer to check_embedded_connection
sql-common/client.c:
  stmt fake attribute added to cli_advanced_command
sql/sql_parse.cc:
  hash_user_connections isn't used if no access checks compiled

1 files changed, 2 insertions, 1 deletions

diff --git a/sql-common/client.c b/sql-common/client.c
index 3a598832253..ce49048ce79 100644
--- a/sql-common/client.c
+++ b/sql-common/client.c
@@ -648,7 +648,8 @@ void free_rows(MYSQL_DATA *cur)
 my_bool
 cli_advanced_command(MYSQL *mysql, enum enum_server_command command,
 		     const char *header, ulong header_length,
-		     const char *arg, ulong arg_length, my_bool skip_check)
+		     const char *arg, ulong arg_length, my_bool skip_check,
+                     MYSQL_STMT *stmt __attribute__((unused)))
 {
   NET *net= &mysql->net;
   my_bool result= 1;