Reading BLOB with zero byte

[doublefint]

Hi Guillaume!
Suppose I create a sqlite_fdw for such db:

-- sqlite3 test.db
Create Table test ( id integer Primary Key autoincrement, data blob );
Insert Into test( data ) Values ( X'4869' );  --'4869' is hex encoded 'Hi'
Select id, data From test;

id     data
----- ------
1      Hi

Update test Set data = X'480069'; --zero byte between 
Select id, data From test;  --the same situation will occur in postgres

id     data
----- ------
1      H

--in sqlite I can still get whole blob
Select id, hex(data) hex_data, length(data) len From test; 

id     hex_data  len
----- ---------- -----
1      480069    3

How do I get the whole blob in postgres with sqlite_fdw?
As far as I know, a similar situation was with mysql_fdw