Re: row level lock and table level locks

>TupleTables are just temporary data structures to hold transiently
>created tuples during execution of a query. There's usually one for
>each plan node.
>
whats a 'plan node'?

>From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
>To: "Jenny -" <nat_lazy(at)hotmail(dot)com>
>CC: pgsql-hackers(at)postgresql(dot)org
>Subject: Re: [HACKERS] row level lock and table level locks Date: Mon, 08
>Sep 2003 12:49:51 -0400
>
>"Jenny -" <nat_lazy(at)hotmail(dot)com> writes:
> > I found out that TupleTable stores per-tuple information(it stores
> > HeapTupleData) and that also there are multiple TupleTables in the db at
>a
> > time.Based on what are diffrent TupleTables created?
>
>TupleTables are just temporary data structures to hold transiently
>created tuples during execution of a query. There's usually one for
>each plan node.
>
> regards, tom lane
>
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