How postgresql manage columns

Question

I want to know the way how postgresql manage columns of table.

Say for eg

I have created one table that contains 2 fields, so how postgresql manage these columns, table? In how many tables postgresql create entry for a single column ?

I would like to know the structure how the postgresql manage table and it's fields.

I only about pg_attribute table.

It would be good if anyone can share useful links.

Any help would be really appriciated.

Answer 1

Tables (and indexes) are organized in 8KB blocks in files in the data directory.

The column definitions are only in pg_attribute .

A table row with all its columns is stored together in one table block, and a table block can contain several such rows. In other words, PostgreSQL uses the traditional row oriented storage model.

Details can be read in the documentation .

Note: Don't use PostgreSQL 9.1 any more.