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MDEV-8931: (server part of) session state tracking

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Transaction tracker
This commit is contained in:
Oleksandr Byelkin 2016-05-30 21:22:50 +02:00
commit 0ee3e64c55
32 changed files with 1169 additions and 266 deletions
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58
sql/sys_vars.cc
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@ -3363,6 +3363,20 @@ bool Sys_var_tx_read_only::session_update(THD *thd, set_var *var)
{
// @see Sys_var_tx_isolation::session_update() above for the rules.
thd->tx_read_only= var->save_result.ulonglong_value;
#ifndef EMBEDDED_LIBRARY
if (thd->variables.session_track_transaction_info > TX_TRACK_NONE)
{
Transaction_state_tracker *tst= (Transaction_state_tracker *)
thd->session_tracker.get_tracker(TRANSACTION_INFO_TRACKER);
if (var->type == OPT_DEFAULT)
tst->set_read_flags(thd,
thd->tx_read_only ? TX_READ_ONLY : TX_READ_WRITE);
else
tst->set_read_flags(thd, TX_READ_INHERIT);
}
#endif //EMBEDDED_LIBRARY
}
return false;
}
@ -5375,11 +5389,10 @@ static Sys_var_ulong Sys_log_tc_size(
BLOCK_SIZE(my_getpagesize()));
#endif
const LEX_CSTRING SESSION_TRACK_SYSTEM_VARIABLES_NAME=
{STRING_WITH_LEN("session_track_system_variables")};
#ifndef EMBEDDED_LIBRARY
static Sys_var_sesvartrack Sys_track_session_sys_vars(
SESSION_TRACK_SYSTEM_VARIABLES_NAME.str,
"session_track_system_variables",
"Track changes in registered system variables.",
CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET,
DEFAULT("autocommit,character_set_client,character_set_connection,"
@ -5390,30 +5403,61 @@ static bool update_session_track_schema(sys_var *self, THD *thd,
enum_var_type type)
{
DBUG_ENTER("update_session_track_schema");
DBUG_RETURN(thd->session_tracker.get_tracker(CURRENT_SCHEMA_TRACKER)->update(thd));
DBUG_RETURN(thd->session_tracker.get_tracker(CURRENT_SCHEMA_TRACKER)->
update(thd, NULL));
}
static Sys_var_mybool Sys_session_track_schema(
"session_track_schema",
"Track changes to the 'default schema'.",
"Track changes to the default schema.",
SESSION_VAR(session_track_schema),
CMD_LINE(OPT_ARG), DEFAULT(TRUE),
NO_MUTEX_GUARD, NOT_IN_BINLOG,
ON_CHECK(0),
ON_UPDATE(update_session_track_schema));
static bool update_session_track_tx_info(sys_var *self, THD *thd,
enum_var_type type)
{
DBUG_ENTER("update_session_track_tx_info");
DBUG_RETURN(thd->session_tracker.get_tracker(TRANSACTION_INFO_TRACKER)->
update(thd, NULL));
}
static const char *session_track_transaction_info_names[]=
{ "OFF", "STATE", "CHARACTERISTICS", NullS };
static Sys_var_enum Sys_session_track_transaction_info(
"session_track_transaction_info",
"Track changes to the transaction attributes. OFF to disable; "
"STATE to track just transaction state (Is there an active transaction? "
"Does it have any data? etc.); CHARACTERISTICS to track transaction "
"state and report all statements needed to start a transaction with"
"the same characteristics (isolation level, read only/read write,"
"snapshot - but not any work done / data modified within the "
"transaction).",
SESSION_VAR(session_track_transaction_info),
CMD_LINE(REQUIRED_ARG), session_track_transaction_info_names,
DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0),
ON_UPDATE(update_session_track_tx_info));
static bool update_session_track_state_change(sys_var *self, THD *thd,
enum_var_type type)
{
DBUG_ENTER("update_session_track_state_change");
DBUG_RETURN(thd->session_tracker.get_tracker(SESSION_STATE_CHANGE_TRACKER)->update(thd));
DBUG_RETURN(thd->session_tracker.get_tracker(SESSION_STATE_CHANGE_TRACKER)->
update(thd, NULL));
}
static Sys_var_mybool Sys_session_track_state_change(
"session_track_state_change",
"Track changes to the 'session state'.",
"Track changes to the session state.",
SESSION_VAR(session_track_state_change),
CMD_LINE(OPT_ARG), DEFAULT(FALSE),
NO_MUTEX_GUARD, NOT_IN_BINLOG,
ON_CHECK(0),
ON_UPDATE(update_session_track_state_change));
#endif //EMBEDDED_LIBRARY