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WL#2130: Table locking for stored FUNCTIONs

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Collect all tables and SPs refered by a statement, and open all tables
with an implicit LOCK TABLES. Do find things refered by triggers and views,
we open them first (and then repeat this until nothing new is found), before
doing the actual lock tables.
This commit is contained in:
pem@mysql.comhem.se
2005-02-08 20:52:50 +01:00
parent 6e6daf8189
commit 2c26ebe359
26 changed files with 838 additions and 340 deletions
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94
sql/sql_parse.cc
View File

@@ -2231,6 +2231,10 @@ mysql_execute_command(THD *thd)
TABLE_LIST *all_tables;
/* most outer SELECT_LEX_UNIT of query */
SELECT_LEX_UNIT *unit= &lex->unit;
/* Locked closure of all tables */
TABLE_LIST *locked_tables= NULL;
/* Saved variable value */
my_bool old_innodb_table_locks= thd->variables.innodb_table_locks;
DBUG_ENTER("mysql_execute_command");
/*
@@ -2252,11 +2256,89 @@ mysql_execute_command(THD *thd)
/* should be assigned after making first tables same */
all_tables= lex->query_tables;
thd->shortcut_make_view= 0;
if (lex->sql_command != SQLCOM_CREATE_PROCEDURE &&
lex->sql_command != SQLCOM_CREATE_SPFUNCTION)
lex->sql_command != SQLCOM_CREATE_SPFUNCTION &&
lex->sql_command != SQLCOM_LOCK_TABLES &&
lex->sql_command != SQLCOM_UNLOCK_TABLES)
{
if (sp_cache_functions(thd, lex))
DBUG_RETURN(-1);
while (1)
{
if (sp_cache_routines(thd, lex, TYPE_ENUM_FUNCTION))
DBUG_RETURN(-1);
if (sp_cache_routines(thd, lex, TYPE_ENUM_PROCEDURE))
DBUG_RETURN(-1);
if (!thd->locked_tables &&
lex->sql_command != SQLCOM_CREATE_TABLE &&
lex->sql_command != SQLCOM_CREATE_VIEW)
{
MEM_ROOT *thdmemroot= NULL;
sp_merge_routine_tables(thd, lex);
// QQ Preopen tables to find views and triggers.
// This means we open, close and open again, which sucks, but
// right now it's the easiest way to get it to work. A better
// solution will hopefully be found soon...
if (lex->sptabs.records || lex->query_tables)
{
uint procs, funs, tabs;
if (thd->mem_root != thd->current_arena->mem_root)
{
thdmemroot= thd->mem_root;
thd->mem_root= thd->current_arena->mem_root;
}
if (!sp_merge_table_list(thd, &lex->sptabs, lex->query_tables))
DBUG_RETURN(-1);
procs= lex->spprocs.records;
funs= lex->spfuns.records;
tabs= lex->sptabs.records;
if ((locked_tables= sp_hash_to_table_list(thd, &lex->sptabs)))
{
// We don't want these updated now
uint ctmpdtabs= thd->status_var.created_tmp_disk_tables;
uint ctmptabs= thd->status_var.created_tmp_tables;
uint count;
thd->shortcut_make_view= TRUE;
open_tables(thd, locked_tables, &count);
thd->shortcut_make_view= FALSE;
close_thread_tables(thd);
thd->status_var.created_tmp_disk_tables= ctmpdtabs;
thd->status_var.created_tmp_tables= ctmptabs;
thd->clear_error();
mysql_reset_errors(thd);
locked_tables= NULL;
}
// A kludge: Decrease all temp. table's query ids to allow a
// second opening.
for (TABLE *table= thd->temporary_tables; table ; table=table->next)
table->query_id-= 1;
if (procs < lex->spprocs.records ||
funs < lex->spfuns.records ||
tabs < lex->sptabs.records)
{
if (thdmemroot)
thd->mem_root= thdmemroot;
continue; // Found more SPs or tabs, try again
}
}
if (lex->sptabs.records &&
(lex->spfuns.records || lex->spprocs.records) &&
sp_merge_table_list(thd, &lex->sptabs, lex->query_tables))
{
if ((locked_tables= sp_hash_to_table_list(thd, &lex->sptabs)))
{
thd->variables.innodb_table_locks= FALSE;
sp_open_and_lock_tables(thd, locked_tables);
}
}
if (thdmemroot)
thd->mem_root= thdmemroot;
}
break;
} // while (1)
}
/*
@@ -4261,6 +4343,12 @@ cleanup:
thd->lock= 0;
}
if (locked_tables)
{
thd->variables.innodb_table_locks= old_innodb_table_locks;
if (thd->locked_tables)
sp_unlock_tables(thd);
}
DBUG_RETURN(res || thd->net.report_error);
}