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Ensure that thd->user_var_events_alloc is always relevant

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If binary logging is not enabled thd->user_var_events_alloc
would never be initialized.
This commit is contained in:
Monty
2018-02-01 20:03:18 +02:00
parent 44314c768f
commit 859fe1f24d
3 changed files with 12 additions and 4 deletions
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5
sql/sp_head.cc
View File

@ -1135,6 +1135,7 @@ sp_head::execute(THD *thd, bool merge_da_on_success)
uint old_server_status;
const uint status_backup_mask= SERVER_STATUS_CURSOR_EXISTS |
SERVER_STATUS_LAST_ROW_SENT;
MEM_ROOT *user_var_events_alloc_saved= 0;
Reprepare_observer *save_reprepare_observer= thd->m_reprepare_observer;
Object_creation_ctx *UNINIT_VAR(saved_creation_ctx);
Diagnostics_area *da= thd->get_stmt_da();
@ -1326,9 +1327,11 @@ sp_head::execute(THD *thd, bool merge_da_on_success)
Will write this SP statement into binlog separately.
TODO: consider changing the condition to "not inside event union".
*/
MEM_ROOT *user_var_events_alloc_saved= thd->user_var_events_alloc;
if (thd->locked_tables_mode <= LTM_LOCK_TABLES)
{
user_var_events_alloc_saved= thd->user_var_events_alloc;
thd->user_var_events_alloc= thd->mem_root;
}
sql_digest_state *parent_digest= thd->m_digest;
thd->m_digest= NULL;

6
sql/sql_class.cc
View File

@ -772,6 +772,12 @@ THD::THD(my_thread_id id, bool is_wsrep_applier)
init_sql_alloc(&main_mem_root, ALLOC_ROOT_MIN_BLOCK_SIZE, 0,
MYF(MY_THREAD_SPECIFIC));
/*
Allocation of user variables for binary logging is always done with main
mem root
*/
user_var_events_alloc= mem_root;
stmt_arena= this;
thread_stack= 0;
scheduler= thread_scheduler; // Will be fixed later

5
sql/sql_parse.cc
View File

@ -7483,10 +7483,9 @@ void THD::reset_for_next_command(bool do_clear_error)
thd->thread_specific_used= FALSE;
if (opt_bin_log)
{
reset_dynamic(&thd->user_var_events);
thd->user_var_events_alloc= thd->mem_root;
}
DBUG_ASSERT(thd->user_var_events_alloc == &thd->main_mem_root);
thd->get_stmt_da()->reset_for_next_command();
thd->rand_used= 0;
thd->m_sent_row_count= thd->m_examined_row_count= 0;