Flush writes any pending messages to the frontend (i.e. the client).
()
| 78 | |
| 79 | // Flush writes any pending messages to the frontend (i.e. the client). |
| 80 | func (b *Backend) Flush() error { |
| 81 | if err := b.encodeError; err != nil { |
| 82 | b.encodeError = nil |
| 83 | b.wbuf = b.wbuf[:0] |
| 84 | return &writeError{err: err, safeToRetry: true} |
| 85 | } |
| 86 | |
| 87 | n, err := b.w.Write(b.wbuf) |
| 88 | |
| 89 | const maxLen = 1024 |
| 90 | if len(b.wbuf) > maxLen { |
| 91 | b.wbuf = make([]byte, 0, maxLen) |
| 92 | } else { |
| 93 | b.wbuf = b.wbuf[:0] |
| 94 | } |
| 95 | |
| 96 | if err != nil { |
| 97 | return &writeError{err: err, safeToRetry: n == 0} |
| 98 | } |
| 99 | |
| 100 | return nil |
| 101 | } |
| 102 | |
| 103 | // Trace starts tracing the message traffic to w. It writes in a similar format to that produced by the libpq function |
| 104 | // PQtrace. |