diff options
Diffstat (limited to 'vendor/github.com/jackc/pgx/v5/large_objects.go')
| -rw-r--r-- | vendor/github.com/jackc/pgx/v5/large_objects.go | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/vendor/github.com/jackc/pgx/v5/large_objects.go b/vendor/github.com/jackc/pgx/v5/large_objects.go index a3028b638..9d21afdce 100644 --- a/vendor/github.com/jackc/pgx/v5/large_objects.go +++ b/vendor/github.com/jackc/pgx/v5/large_objects.go @@ -4,6 +4,8 @@ import ( "context" "errors" "io" + + "github.com/jackc/pgx/v5/pgtype" ) // The PostgreSQL wire protocol has a limit of 1 GB - 1 per message. See definition of @@ -115,9 +117,10 @@ func (o *LargeObject) Read(p []byte) (int, error) { expected = maxLargeObjectMessageLength } - var res []byte + res := pgtype.PreallocBytes(p[nTotal:]) err := o.tx.QueryRow(o.ctx, "select loread($1, $2)", o.fd, expected).Scan(&res) - copy(p[nTotal:], res) + // We compute expected so that it always fits into p, so it should never happen + // that PreallocBytes's ScanBytes had to allocate a new slice. nTotal += len(res) if err != nil { return nTotal, err |