datatype: not variable, not fixed length

Well variable is defined at creation time, see char() and varchar().
text data type is truely variable. pg_attribute.atttypmod has info
about the lenght.

---------------------------------------------------------------------------

Moritz Sinn wrote:

hi,

i'd like to write a datatype which is similar to varchar, i want the
programmer be able to set its length when he creates the table. but
it seems that there are only 2 options: completely variable or fixed.
so do i have to write an new basic type and recompile postgresql?

thanks,
moritz

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