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MW-86 Add separate wsrep_sync_wait bitmask value for SHOW commands

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Previously, setting `wsrep_sync_wait = 1` would have an effect on
both SELECT and SHOW statements.
This patch changes wsrep_sync_wait so that bitmask value 1 is used
for SELECT statements, while bitmask value 8 is reserved for SHOW
statements.
It is still possible to achieve sync wait on both SELECT and SHOW
statements by setting `wsrep_sync_wait = 9`.
This commit is contained in:
Daniele Sciascia 2017-03-08 13:08:21 +01:00 committed by Jan Lindström
parent afbaa5c697
commit 7a219b6f23
3 changed files with 30 additions and 69 deletions
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89
sql/sql_parse.cc
View File

@ -2788,10 +2788,6 @@ mysql_execute_command(THD *thd)
/* fall through */
case SQLCOM_SHOW_STATUS_PROC:
case SQLCOM_SHOW_STATUS_FUNC:
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) && wsrep_sync_wait(thd)) goto error;
#endif /* WITH_WSREP */
case SQLCOM_SHOW_DATABASES:
case SQLCOM_SHOW_TABLES:
case SQLCOM_SHOW_TRIGGERS:
@ -2800,27 +2796,21 @@ mysql_execute_command(THD *thd)
case SQLCOM_SHOW_PLUGINS:
case SQLCOM_SHOW_FIELDS:
case SQLCOM_SHOW_KEYS:
#ifndef WITH_WSREP
case SQLCOM_SHOW_VARIABLES:
case SQLCOM_SHOW_CHARSETS:
case SQLCOM_SHOW_COLLATIONS:
case SQLCOM_SHOW_STORAGE_ENGINES:
case SQLCOM_SHOW_PROFILE:
#endif /* WITH_WSREP */
case SQLCOM_SHOW_CLIENT_STATS:
case SQLCOM_SHOW_USER_STATS:
case SQLCOM_SHOW_TABLE_STATS:
case SQLCOM_SHOW_INDEX_STATS:
case SQLCOM_SELECT:
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) && wsrep_sync_wait(thd)) goto error;
case SQLCOM_SHOW_VARIABLES:
case SQLCOM_SHOW_CHARSETS:
case SQLCOM_SHOW_COLLATIONS:
case SQLCOM_SHOW_STORAGE_ENGINES:
case SQLCOM_SHOW_PROFILE:
#endif /* WITH_WSREP */
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_SHOW);
case SQLCOM_SELECT:
{
if (lex->sql_command == SQLCOM_SELECT)
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_READ);
thd->status_var.last_query_cost= 0.0;
/*
@ -3518,9 +3508,7 @@ end_with_restore_list:
goto error;
#else
{
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) && wsrep_sync_wait(thd)) goto error;
#endif /* WITH_WSREP */
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_SHOW);
/*
Access check:
@ -3584,9 +3572,7 @@ end_with_restore_list:
case SQLCOM_CHECKSUM:
{
DBUG_ASSERT(first_table == all_tables && first_table != 0);
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) && wsrep_sync_wait(thd)) goto error;
#endif /* WITH_WSREP */
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_READ);
if (check_table_access(thd, SELECT_ACL, all_tables,
FALSE, UINT_MAX, FALSE))
@ -3596,11 +3582,8 @@ end_with_restore_list:
break;
}
case SQLCOM_UPDATE:
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) &&
wsrep_sync_wait(thd, WSREP_SYNC_WAIT_BEFORE_UPDATE_DELETE)) goto error;
#endif /* WITH_WSREP */
{
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_UPDATE_DELETE);
ha_rows found= 0, updated= 0;
DBUG_ASSERT(first_table == all_tables && first_table != 0);
if (update_precheck(thd, all_tables))
@ -3639,10 +3622,7 @@ end_with_restore_list:
/* if we switched from normal update, rights are checked */
if (up_result != 2)
{
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) &&
wsrep_sync_wait(thd, WSREP_SYNC_WAIT_BEFORE_UPDATE_DELETE)) goto error;
#endif /* WITH_WSREP */
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_UPDATE_DELETE);
if ((res= multi_update_precheck(thd, all_tables)))
break;
}
@ -3712,10 +3692,7 @@ end_with_restore_list:
break;
}
case SQLCOM_REPLACE:
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) &&
wsrep_sync_wait(thd, WSREP_SYNC_WAIT_BEFORE_INSERT_REPLACE)) goto error;
#endif /* WITH_WSREP */
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_INSERT_REPLACE);
#ifndef DBUG_OFF
if (mysql_bin_log.is_open())
{
@ -3752,11 +3729,8 @@ end_with_restore_list:
#endif
/* fall through */
case SQLCOM_INSERT:
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) &&
wsrep_sync_wait(thd, WSREP_SYNC_WAIT_BEFORE_INSERT_REPLACE)) goto error;
#endif /* WITH_WSREP */
{
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_INSERT_REPLACE);
DBUG_ASSERT(first_table == all_tables && first_table != 0);
/*
@ -3809,11 +3783,8 @@ end_with_restore_list:
}
case SQLCOM_REPLACE_SELECT:
case SQLCOM_INSERT_SELECT:
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) &&
wsrep_sync_wait(thd, WSREP_SYNC_WAIT_BEFORE_INSERT_REPLACE)) goto error;
#endif /* WITH_WSREP */
{
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_INSERT_REPLACE);
select_result *sel_result;
bool explain= MY_TEST(lex->describe);
DBUG_ASSERT(first_table == all_tables && first_table != 0);
@ -3927,11 +3898,8 @@ end_with_restore_list:
break;
}
case SQLCOM_DELETE:
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) &&
wsrep_sync_wait(thd, WSREP_SYNC_WAIT_BEFORE_UPDATE_DELETE)) goto error;
#endif /* WITH_WSREP */
{
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_UPDATE_DELETE);
select_result *sel_result=lex->result;
DBUG_ASSERT(first_table == all_tables && first_table != 0);
if ((res= delete_precheck(thd, all_tables)))
@ -3951,11 +3919,8 @@ end_with_restore_list:
break;
}
case SQLCOM_DELETE_MULTI:
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) &&
wsrep_sync_wait(thd, WSREP_SYNC_WAIT_BEFORE_UPDATE_DELETE)) goto error;
#endif /* WITH_WSREP */
{
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_UPDATE_DELETE);
DBUG_ASSERT(first_table == all_tables && first_table != 0);
TABLE_LIST *aux_tables= thd->lex->auxiliary_table_list.first;
bool explain= MY_TEST(lex->describe);
@ -4361,9 +4326,7 @@ end_with_restore_list:
db_name.length= lex->name.length;
strmov(db_name.str, lex->name.str);
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) && wsrep_sync_wait(thd)) goto error;
#endif /* WITH_WSREP */
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_SHOW);
if (check_db_name(&db_name))
{
@ -4421,9 +4384,7 @@ end_with_restore_list:
/* lex->unit.cleanup() is called outside, no need to call it here */
break;
case SQLCOM_SHOW_CREATE_EVENT:
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) && wsrep_sync_wait(thd)) goto error;
#endif /* WITH_WSREP */
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_SHOW);
res= Events::show_create_event(thd, lex->spname->m_db,
lex->spname->m_name);
break;
@ -5382,18 +5343,14 @@ create_sp_error:
}
case SQLCOM_SHOW_CREATE_PROC:
{
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) && wsrep_sync_wait(thd)) goto error;
#endif /* WITH_WSREP */
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_SHOW);
if (sp_show_create_routine(thd, TYPE_ENUM_PROCEDURE, lex->spname))
goto error;
break;
}
case SQLCOM_SHOW_CREATE_FUNC:
{
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) && wsrep_sync_wait(thd)) goto error;
#endif /* WITH_WSREP */
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_SHOW);
if (sp_show_create_routine(thd, TYPE_ENUM_FUNCTION, lex->spname))
goto error;
break;
@ -5406,9 +5363,7 @@ create_sp_error:
stored_procedure_type type= (lex->sql_command == SQLCOM_SHOW_PROC_CODE ?
TYPE_ENUM_PROCEDURE : TYPE_ENUM_FUNCTION);
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) && wsrep_sync_wait(thd)) goto error;
#endif /* WITH_WSREP */
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_SHOW);
if (sp_cache_routine(thd, type, lex->spname, FALSE, &sp))
goto error;
if (!sp || sp->show_routine_code(thd))
@ -5430,9 +5385,7 @@ create_sp_error:
if (check_ident_length(&lex->spname->m_name))
goto error;
#ifdef WITH_WSREP
if (WSREP_CLIENT(thd) && wsrep_sync_wait(thd)) goto error;
#endif /* WITH_WSREP */
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_SHOW);
if (show_create_trigger(thd, lex->spname))
goto error; /* Error has been already logged. */
@ -5850,9 +5803,11 @@ static bool execute_show_status(THD *thd, TABLE_LIST *all_tables)
bool res;
system_status_var old_status_var= thd->status_var;
thd->initial_status_var= &old_status_var;
WSREP_SYNC_WAIT(thd, WSREP_SYNC_WAIT_BEFORE_SHOW);
if (!(res= check_table_access(thd, SELECT_ACL, all_tables, FALSE,
UINT_MAX, FALSE)))
res= execute_sqlcom_select(thd, all_tables);
error:
/* Don't log SHOW STATUS commands to slow query log */
thd->server_status&= ~(SERVER_QUERY_NO_INDEX_USED |
SERVER_QUERY_NO_GOOD_INDEX_USED);

5
sql/sql_parse.h
View File

@ -225,11 +225,16 @@ inline bool is_supported_parser_charset(CHARSET_INFO *cs)
if (WSREP(thd) && !thd->lex->no_write_to_binlog \
&& wsrep_to_isolation_begin(thd, db_, table_, table_list_)) goto error;
#define WSREP_SYNC_WAIT(thd_, before_) \
if (WSREP_CLIENT(thd_) && \
wsrep_sync_wait(thd_, before_)) goto error;
#else
#define WSREP_TO_ISOLATION_BEGIN(db_, table_, table_list_)
#define WSREP_TO_ISOLATION_END
#define WSREP_TO_ISOLATION_BEGIN_WRTCHK(db_, table_, table_list_)
#define WSREP_SYNC_WAIT(thd_, before_)
#endif /* WITH_WSREP */

5
sql/wsrep_mysqld.h
View File

@ -118,11 +118,12 @@ enum enum_wsrep_OSU_method {
enum enum_wsrep_sync_wait {
WSREP_SYNC_WAIT_NONE = 0x0,
// show, select, begin
// select, begin
WSREP_SYNC_WAIT_BEFORE_READ = 0x1,
WSREP_SYNC_WAIT_BEFORE_UPDATE_DELETE = 0x2,
WSREP_SYNC_WAIT_BEFORE_INSERT_REPLACE = 0x4,
WSREP_SYNC_WAIT_MAX = 0x7
WSREP_SYNC_WAIT_BEFORE_SHOW = 0x8,
WSREP_SYNC_WAIT_MAX = 0xF
};
// MySQL status variables