Re: [HACKERS] Re: [GENERAL] Update of bitmask type

> attypmod has been modified recently to contain two fields (each of 16
> bits) in a backward-compatible way. It can hold the size *and*
> precision of the numeric data types, and presumably should be used in
> a similar manner for your bit type.

You can use a union to split atttypmod up into two 8-bit fields and on
16-bit field. Let me know if you need help.

>
> The problem is that you need another field which contains a length in
> bit units. Assuming that the second field in attypmod can't be used
> for this purpose, then istm that you will want to add a field to the
> data type itself. The character types have:
>
> length - total size of data, in bytes (4 bytes)
> data - body
>
> and you might have
>
> length - total size of data, in bytes (4 bytes)
> blen - total size of data, in bits (4 bytes)
> data - body
>
> - Thomas
>
> --
> Thomas Lockhart lockhart(at)alumni(dot)caltech(dot)edu
> South Pasadena, California
>
> ************
>
>

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