Re: NODE

On 01/05/2015 09:28 PM, Ravi Kiran wrote:
> hi,
>
> I am going through the hashjoin algorithm in postgres. I find a function
> ExecHashjoin , which is called each time a new tuple is required by the
> hash join *Node.*
>
> could someone explain what exactly node mean in  postgres.

See src/backend/nodes/. It's a mechanism that imitates class inheritance 
in object-oriented languages. Node is the superclass that everything 
else inherits from. Every Node type supports some basic operations like 
copy, equals and serialization to/from text.

- Heikki