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0.6: truncate history feature [closes #96]

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This commit is contained in:
kevg
2016-12-23 17:05:57 +03:00
committed by Aleksey Midenkov
parent 4c37011582
commit c9e4ac4b72
15 changed files with 301 additions and 29 deletions
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58
sql/sql_delete.cc
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@ -215,19 +215,13 @@ void Update_plan::save_explain_data_intern(MEM_ROOT *mem_root,
inline
int TABLE::delete_row()
{
int error;
if (!versioned_by_sql())
error= file->ha_delete_row(record[0]);
else
{
store_record(this, record[1]);
Field *sys_trx_end= vers_end_field();
sys_trx_end->set_time();
error= file->ha_update_row(record[1], record[0]);
}
return error;
}
if (!versioned_by_sql() || !vers_end_field()->is_max())
return file->ha_delete_row(record[0]);
store_record(this, record[1]);
vers_end_field()->set_time();
return file->ha_update_row(record[1], record[0]);
}
/**
Implement DELETE SQL word.
@ -269,6 +263,34 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
if (open_and_lock_tables(thd, table_list, TRUE, 0))
DBUG_RETURN(TRUE);
bool truncate_history=
select_lex->vers_conditions.type != FOR_SYSTEM_TIME_UNSPECIFIED;
if (truncate_history)
{
TABLE *table= table_list->table;
DBUG_ASSERT(table);
if (table->versioned_by_engine() &&
table->file->check_table_binlog_row_based(1))
{
my_error(ER_VERS_NOT_ALLOWED, MYF(0),
"TRUNCATE FOR SYSTEM_TIME with row-based replication");
DBUG_RETURN(TRUE);
}
DBUG_ASSERT(!conds);
if (vers_setup_select(thd, table_list, &conds, select_lex))
DBUG_RETURN(TRUE);
// trx_sees() in InnoDB reads sys_trx_start
if (!table->versioned_by_sql() &&
(select_lex->vers_conditions.type == FOR_SYSTEM_TIME_BETWEEN ||
select_lex->vers_conditions.type == FOR_SYSTEM_TIME_FROM_TO))
{
bitmap_set_bit(table->read_set, table->vers_start_field()->field_index);
}
}
if (mysql_handle_list_of_derived(thd->lex, table_list, DT_MERGE_FOR_INSERT))
DBUG_RETURN(TRUE);
if (mysql_handle_list_of_derived(thd->lex, table_list, DT_PREPARE))
@ -577,9 +599,13 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
while (!(error=info.read_record(&info)) && !thd->killed &&
! thd->is_error())
{
if (table->versioned() && !table->vers_end_field()->is_max())
if (table->versioned())
{
continue;
bool row_is_alive= table->vers_end_field()->is_max();
if (truncate_history && row_is_alive)
continue;
if (!truncate_history && !row_is_alive)
continue;
}
explain->tracker.on_record_read();
@ -589,7 +615,7 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
if (!select || select->skip_record(thd) > 0)
{
explain->tracker.on_record_after_where();
if (table->triggers &&
if (!truncate_history && table->triggers &&
table->triggers->process_triggers(thd, TRG_EVENT_DELETE,
TRG_ACTION_BEFORE, FALSE))
{
@ -607,7 +633,7 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
if (!error)
{
deleted++;
if (table->triggers &&
if (!truncate_history && table->triggers &&
table->triggers->process_triggers(thd, TRG_EVENT_DELETE,
TRG_ACTION_AFTER, FALSE))
{