No, it is a dialect 3 database.

I have just created a brand new database, dialect 3, FB 2.1, and got
the same result.

Looking at table RDB$FIELDS, i see the domain of the view field has
RDB$FIELD_PRECISION = null

Database "teste.fdb"
Database header page information:
Flags 0
Checksum 12345
Generation 1190
Page size 4096
ODS version 11.1
Oldest transaction 1170
Oldest active 1171
Oldest snapshot 1171
Next transaction 1175
Bumped transaction 1
Sequence number 0
Next attachment ID 9
Implementation ID 19
Shadow count 0
Page buffers 0
Next header page 0
Database dialect 3
Creation date Jun 18, 2008 5:02:10
Attributes force write