[ADMIN] problem creating hash index

[HENAFF Mari-mai FTRD/DMI/LAN]

Hi,

I have a problem creating a hash index : it's too slow (it takes several
days, i stopped it before the end).
When i create a b-tree index on the same field, it takes approximately
twenty minutes.
The type of the field indexed is Varchar(16). The table indexed contains 20
MO of rows.

Thanks for your help,
M. Henaff