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给你讲懂 MVCC 续篇
2022-06-24 23:19:00 【InfoQ】
/**
Opens a read view where exactly the transactions serialized before this
point in time are seen in the view.
@param id Creator transaction id */
void ReadView::prepare(trx_id_t id) {
ut_ad(mutex_own(&trx_sys->mutex));
m_creator_trx_id = id;
m_low_limit_no = m_low_limit_id = m_up_limit_id = trx_sys->max_trx_id;
幻读
select * from table1 where id < 10 for update
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