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Remove the flag vers_update_trt

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THD::vers_update_trt, trx_t::vers_update_trt, trx_savept_t::vers_update_trt:
Remove. Instead, determine from trx_t::mod_tables whether versioned
columns were affected by the transaction.

handlerton::prepare_commit_versioned: Replaces vers_get_trt_data.
Return the transaction start ID and also the commit ID, in case
the transaction modified any system-versioned columns (0 if not).

TR_table::store_data(): Remove (merge with update() below).

TR_table::update(): Add the parameters start_id, end_id.

ha_commit_trans(): Remove a condition on SQLCOM_ALTER_TABLE.
If we need something special for ALTER TABLE...ALGORITHM=INPLACE,
that can be done inside InnoDB by modifying trx_t::mod_tables.

innodb_prepare_commit_versioned(): Renamed from innodb_get_trt_data().
Check trx_t::mod_tables to see if any changes to versioned columns
are present.

trx_mod_table_time_t: A pair of logical timestamps, replacing the
undo_no_t in trx_mod_tables_t. Keep track of not only the first
modification to a persistent table in each transaction, but also
the first modification of a versioned column in a table.

dtype_t, dict_col_t: Add the accessor is_any_versioned(), to check
if the type refers to a system-versioned user or system column.

upd_t::affects_versioned(): Check if an update affects a versioned
column.

trx_undo_report_row_operation(): If a versioned column is affected
by the update, invoke trx_mod_table_time_t::set_versioned().

trx_rollback_to_savepoint_low(): If all changes to versioned columns
were rolled back, invoke trx_mod_table_time_t::rollback_versioned(),
so that trx_mod_table_time_t::is_versioned() will no longer hold.
This commit is contained in:
Marko Mäkelä
2017-11-24 12:03:24 +02:00
committed by Aleksey Midenkov
parent 03fbfeef66
commit 0b89a42ffc
21 changed files with 185 additions and 138 deletions
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7
sql/sql_class.cc
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@ -710,11 +710,6 @@ extern "C" void thd_kill_timeout(THD* thd)
mysql_mutex_unlock(&thd->LOCK_thd_data);
}
void thd_vers_update_trt(THD * thd, bool value)
{
thd->vers_update_trt= value;
}
THD::THD(my_thread_id id, bool is_wsrep_applier)
:Statement(&main_lex, &main_mem_root, STMT_CONVENTIONAL_EXECUTION,
/* statement id */ 0),
@ -1347,8 +1342,6 @@ void THD::init(void)
wsrep_skip_wsrep_GTID = false;
#endif /* WITH_WSREP */
vers_update_trt = false;
if (variables.sql_log_bin)
variables.option_bits|= OPTION_BIN_LOG;
else