pq-get-blob ( handle row column -- obj/f )

Vocabulary

db.postgresql.lib

Inputs

handle	an object
row	an object
column	an object

Outputs

obj/f

an object

Definition

USING: alien.c-types alien.data db.postgresql.ffi destructors
kernel math strings ;

IN: db.postgresql.lib

: pq-get-blob ( handle row column -- obj/f )
    [ PQgetvalue ] 3keep 3dup PQgetlength dup 0 > [
        3nip [
            memory>byte-array >string
            { uint } [
                PQunescapeBytea dup zero?
                [ postgresql-result-error-message throw ]
                [ &PQfreemem ] if
            ] with-out-parameters memory>byte-array
        ] with-destructors
    ] [ drop pq-get-is-null nip f B{ } ? ] if ;