我有以下代码:(假设初始txid = a)
select count(*) from tabl;
--------------------------
count=2;
select current_txid();
--------------------------
a+1;
begin;
insert into tabl values(v1,v2);
insert into tabl values(v3,v4);
commit;
select count(*) from tabl;
--------------------------
count=4;
select current_txid();
--------------------------
a+3
为什么/当前的txid = 3应该是多少,因为有多个sql语句即事务?