1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
5 ;;;; Name: postgresql-socket-api.lisp
6 ;;;; Purpose: Low-level PostgreSQL interface using sockets
7 ;;;; Authors: Kevin M. Rosenberg based on original code by Pierre R. Mai
12 ;;;; This file, part of CLSQL, is Copyright (c) 2002-2004 by Kevin M. Rosenberg
13 ;;;; and Copyright (c) 1999-2001 by Pierre R. Mai
15 ;;;; CLSQL users are granted the rights to distribute and use this software
16 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
17 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
18 ;;;; *************************************************************************
20 (in-package #:postgresql-socket)
22 (uffi:def-enum pgsql-ftype
30 (defmethod clsql-sys:database-type-library-loaded ((database-type
31 (eql :postgresql-socket)))
32 "T if foreign library was able to be loaded successfully. Always true for
36 (defmethod clsql-sys:database-type-load-foreign ((database-type (eql :postgresql-socket)))
42 (defmacro define-message-constants (description &rest clauses)
43 (assert (evenp (length clauses)))
44 (loop with seen-characters = nil
45 for (name char) on clauses by #'cddr
46 for char-code = (char-code char)
47 for doc-string = (format nil "~A (~:C): ~A" description char name)
48 if (member char seen-characters)
49 do (error "Duplicate message type ~@C for group ~A" char description)
52 `(defconstant ,name ,char-code ,doc-string)
54 and do (push char seen-characters)
56 (return `(progn ,@result-clauses))))
58 (eval-when (:compile-toplevel :load-toplevel :execute)
59 (define-message-constants "Backend Message Constants"
60 +ascii-row-message+ #\D
61 +authentication-message+ #\R
62 +backend-key-message+ #\K
63 +binary-row-message+ #\B
64 +completed-response-message+ #\C
65 +copy-in-response-message+ #\G
66 +copy-out-response-message+ #\H
67 +cursor-response-message+ #\P
68 +empty-query-response-message+ #\I
69 +error-response-message+ #\E
70 +function-response-message+ #\V
71 +notice-response-message+ #\N
72 +notification-response-message+ #\A
73 +ready-for-query-message+ #\Z
74 +row-description-message+ #\T))
77 (declaim (inline read-byte write-byte))
79 (defun send-socket-value-int32 (socket value)
80 (declare (type stream socket)
81 (type (unsigned-byte 32) value))
82 (write-byte (ldb (byte 8 24) value) socket)
83 (write-byte (ldb (byte 8 16) value) socket)
84 (write-byte (ldb (byte 8 8) value) socket)
85 (write-byte (ldb (byte 8 0) value) socket)
88 (defun send-socket-value-int16 (socket value)
89 (declare (type stream socket)
90 (type (unsigned-byte 16) value))
91 (write-byte (ldb (byte 8 8) value) socket)
92 (write-byte (ldb (byte 8 0) value) socket)
95 (defun send-socket-value-int8 (socket value)
96 (declare (type stream socket)
97 (type (unsigned-byte 8) value))
98 (write-byte (ldb (byte 8 0) value) socket)
101 (defun send-socket-value-char-code (socket value)
102 (declare (type stream socket)
103 (type character value))
104 (write-byte (ldb (byte 8 0) (char-code value)) socket)
107 (defun send-socket-value-string (socket value)
108 (declare (type stream socket)
111 (loop for char across value
112 for code = (char-code char)
113 do (write-byte code socket)
114 finally (write-byte 0 socket))
116 (write-sequence (sb-ext:string-to-octets value :null-terminate t) socket)
119 (defun send-socket-value-limstring (socket value limit)
120 (declare (type stream socket)
123 (let ((length (length value)))
124 (dotimes (i (min length limit))
125 (let ((code (char-code (char value i))))
126 (write-byte code socket)))
127 (dotimes (i (- limit length))
128 (write-byte 0 socket)))
132 (defun read-socket-value-int32 (socket)
133 (declare (type stream socket))
134 (declare (optimize (speed 3)))
136 (declare (type (unsigned-byte 32) result))
137 (setf (ldb (byte 8 24) result) (read-byte socket))
138 (setf (ldb (byte 8 16) result) (read-byte socket))
139 (setf (ldb (byte 8 8) result) (read-byte socket))
140 (setf (ldb (byte 8 0) result) (read-byte socket))
143 (defun read-socket-value-int16 (socket)
144 (declare (type stream socket))
146 (declare (type (unsigned-byte 16) result))
147 (setf (ldb (byte 8 8) result) (read-byte socket))
148 (setf (ldb (byte 8 0) result) (read-byte socket))
151 (defun read-socket-value-int8 (socket)
152 (declare (type stream socket))
155 (defun read-socket-value-string (socket)
156 (declare (type stream socket))
158 (with-output-to-string (out)
159 (loop for code = (read-byte socket)
161 do (write-char (code-char code) out)))
163 (let ((bytes (make-array 64
164 :element-type '(unsigned-byte 8)
167 (loop for code = (read-byte socket)
169 do (vector-push-extend code bytes))
170 (sb-ext:octets-to-string bytes)))
173 (defmacro define-message-sender (name (&rest args) &rest clauses)
174 (let ((socket-var (gensym))
176 (dolist (clause clauses)
177 (let* ((type (first clause))
178 (fn (intern (concatenate 'string (symbol-name '#:send-socket-value-)
179 (symbol-name type)))))
180 (push `(,fn ,socket-var ,@(rest clause)) body)))
181 `(defun ,name (,socket-var ,@args)
184 (define-message-sender send-startup-message
185 (database user &optional (command-line "") (backend-tty ""))
187 (int32 #x00020000) ; Version 2.0
188 (limstring database 64)
190 (limstring command-line 64)
191 (limstring "" 64) ; Unused
192 (limstring backend-tty 64))
194 (define-message-sender send-terminate-message ()
197 (define-message-sender send-unencrypted-password-message (password)
198 (int32 (+ 5 (length password)))
201 (define-message-sender send-query-message (query)
205 (define-message-sender send-encrypted-password-message (crypted-password)
206 (int32 (+ 5 (length crypted-password)))
207 (string crypted-password))
209 (define-message-sender send-cancel-request (pid key)
211 (int32 80877102) ; Magic
216 (defun read-socket-sequence (stream length &optional (allow-wide t))
217 (declare (stream stream)
218 (optimize (speed 3) (safety 0)))
220 (let ((result (make-string length)))
221 (dotimes (i length result)
223 (setf (char result i) (code-char (read-byte stream)))))
225 (let ((bytes (make-array length :element-type '(unsigned-byte 8))))
226 (declare (type (simple-array (unsigned-byte 8) (*)) bytes))
227 (read-sequence bytes stream)
229 (sb-ext:octets-to-string bytes)
230 (map 'string #'code-char bytes))))
232 ;;; Support for encrypted password transmission
235 (eval-when (:compile-toplevel :load-toplevel :execute)
236 (defvar *crypt-library-loaded* nil)
238 (unless *crypt-library-loaded*
239 (uffi:load-foreign-library
240 (uffi:find-foreign-library "libcrypt"
241 '(#+(or 64bit x86-64) "/usr/lib64/"
242 "/usr/lib/" "/usr/local/lib/" "/lib/"))
243 :supporting-libraries '("c"))
244 (setq *crypt-library-loaded* t)))
246 (in-package :postgresql-socket)
248 (uffi:def-function ("crypt" crypt)
253 (defun crypt-password (password salt)
254 "Encrypt a password for transmission to a PostgreSQL server."
255 (uffi:with-cstring (password-cstring password)
256 (uffi:with-cstring (salt-cstring salt)
257 (uffi:convert-from-cstring
258 (crypt password-cstring salt-cstring)))))
261 ;;;; Condition hierarchy
263 (define-condition postgresql-condition (condition)
264 ((connection :initarg :connection :reader postgresql-condition-connection)
265 (message :initarg :message :reader postgresql-condition-message))
268 (format stream "~@<~A occurred on connection ~A. ~:@_Reason: ~A~:@>"
270 (postgresql-condition-connection c)
271 (postgresql-condition-message c)))))
273 (define-condition postgresql-error (error postgresql-condition)
276 (define-condition postgresql-fatal-error (postgresql-error)
279 (define-condition postgresql-login-error (postgresql-fatal-error)
282 (define-condition postgresql-warning (warning postgresql-condition)
285 (define-condition postgresql-notification (postgresql-condition)
289 (format stream "~@<Asynchronous notification on connection ~A: ~:@_~A~:@>"
290 (postgresql-condition-connection c)
291 (postgresql-condition-message c)))))
295 (defstruct postgresql-connection
307 (defstruct postgresql-cursor
314 (defconstant +postgresql-server-default-port+ 5432
315 "Default port of PostgreSQL server.")
317 (defvar *postgresql-server-socket-timeout* 60
318 "Timeout in seconds for reads from the PostgreSQL server.")
321 (defun open-postgresql-socket (host port)
324 ;; Directory to unix-domain socket
325 (ext:connect-to-unix-socket
327 (make-pathname :name ".s.PGSQL" :type (princ-to-string port)
330 (ext:connect-to-inet-socket host port))))
333 (defun open-postgresql-socket (host port)
336 ;; Directory to unix-domain socket
337 (let ((sock (make-instance 'sb-bsd-sockets:local-socket
339 (sb-bsd-sockets:socket-connect
342 (make-pathname :name ".s.PGSQL" :type (princ-to-string port)
346 (let ((sock (make-instance 'sb-bsd-sockets:inet-socket
349 (sb-bsd-sockets:socket-connect
351 (sb-bsd-sockets:host-ent-address
352 (sb-bsd-sockets:get-host-by-name host))
357 (defun open-postgresql-socket-stream (host port)
358 (system:make-fd-stream
359 (open-postgresql-socket host port)
360 :input t :output t :element-type '(unsigned-byte 8)
362 :timeout *postgresql-server-socket-timeout*))
366 (defun open-postgresql-socket-stream (host port)
367 (sb-bsd-sockets:socket-make-stream
368 (open-postgresql-socket host port) :input t :output t
369 :element-type '(unsigned-byte 8)))
373 (defun open-postgresql-socket-stream (host port)
376 (let ((path (namestring
377 (make-pathname :name ".s.PGSQL" :type (princ-to-string port)
379 (socket:make-socket :type :stream :address-family :file
381 :remote-filename path :local-filename path)))
383 (socket:with-pending-connect
384 (mp:with-timeout (*postgresql-server-socket-timeout* (error "connect failed"))
385 (socket:make-socket :type :stream :address-family :internet
386 :remote-port port :remote-host host
387 :connect :active :nodelay t))))))
390 (defun open-postgresql-socket-stream (host port)
393 (let ((path (namestring
394 (make-pathname :name ".s.PGSQL" :type (princ-to-string port)
396 (ccl:make-socket :type :stream :address-family :file
398 :remote-filename path :local-filename path)))
400 (ccl:make-socket :type :stream :address-family :internet
401 :remote-port port :remote-host host
402 :connect :active :nodelay t))))
405 (defun open-postgresql-socket-stream (host port)
408 (error "File sockets not supported on Lispworks."))
410 (comm:open-tcp-stream host port :direction :io :element-type '(unsigned-byte 8)
411 :read-timeout *postgresql-server-socket-timeout*))
416 (defun open-postgresql-socket-stream (host port)
419 (error "Not supported"))
421 (socket:socket-connect
423 :element-type '(unsigned-byte 8)
424 :timeout *postgresql-server-socket-timeout*))))
427 ;;; Interface Functions
429 (defun open-postgresql-connection (&key (host (cmucl-compat:required-argument))
430 (port +postgresql-server-default-port+)
431 (database (cmucl-compat:required-argument))
432 (user (cmucl-compat:required-argument))
433 options tty password)
434 "Open a connection to a PostgreSQL server with the given parameters.
435 Note that host, database and user arguments must be supplied.
437 If host is a pathname, it is assumed to name a directory containing
438 the local unix-domain sockets of the server, with port selecting which
439 of those sockets to open. If host is a string, it is assumed to be
440 the name of the host running the PostgreSQL server. In that case a
441 TCP connection to the given port on that host is opened in order to
442 communicate with the server. In either case the port argument
443 defaults to `+postgresql-server-default-port+'.
445 Password is the clear-text password to be passed in the authentication
446 phase to the server. Depending on the server set-up, it is either
447 passed in the clear, or encrypted via crypt and a server-supplied
448 salt. In that case the alien function specified by `*crypt-library*'
449 and `*crypt-function-name*' is used for encryption.
451 Note that all the arguments (including the clear-text password
452 argument) are stored in the `postgresql-connection' structure, in
453 order to facilitate automatic reconnection in case of communication
455 (reopen-postgresql-connection
456 (make-postgresql-connection :host host :port port
457 :options (or options "") :tty (or tty "")
458 :database database :user user
459 :password (or password ""))))
461 (defun encrypt-md5 (plaintext salt)
463 (format nil "~{~2,'0X~}"
464 (coerce (md5sum-sequence (concatenate 'string plaintext salt)) 'list))))
466 (defun reopen-postgresql-connection (connection)
467 "Reopen the given PostgreSQL connection. Closes any existing
468 connection, if it is still open."
469 (when (postgresql-connection-open-p connection)
470 (close-postgresql-connection connection))
471 (let ((socket (open-postgresql-socket-stream
472 (postgresql-connection-host connection)
473 (postgresql-connection-port connection))))
476 (setf (postgresql-connection-socket connection) socket)
477 (send-startup-message socket
478 (postgresql-connection-database connection)
479 (postgresql-connection-user connection)
480 (postgresql-connection-options connection)
481 (postgresql-connection-tty connection))
482 (force-output socket)
484 (case (read-socket-value-int8 socket)
485 (#.+authentication-message+
486 (case (read-socket-value-int32 socket)
489 (error 'postgresql-login-error
490 :connection connection
492 "Postmaster expects unsupported Kerberos authentication."))
494 (send-unencrypted-password-message
496 (postgresql-connection-password connection))
497 (force-output socket))
499 (let ((salt (read-socket-sequence socket 2 nil)))
500 (send-encrypted-password-message
503 (postgresql-connection-password connection) salt)))
504 (force-output socket))
506 (let ((salt (read-socket-sequence socket 4 nil)))
507 (let* ((pwd2 (encrypt-md5 (postgresql-connection-password connection)
508 (postgresql-connection-user connection)))
509 (pwd (encrypt-md5 pwd2 salt)))
510 (send-encrypted-password-message
512 (concatenate 'string "md5" pwd))))
513 (force-output socket))
515 (error 'postgresql-login-error
516 :connection connection
518 "Postmaster expects unknown authentication method."))))
519 (#.+error-response-message+
520 (let ((message (read-socket-value-string socket)))
521 (error 'postgresql-login-error
522 :connection connection :message message)))
524 (error 'postgresql-login-error
525 :connection connection
527 "Received garbled message from Postmaster"))))
528 ;; Start backend communication
529 (force-output socket)
531 (case (read-socket-value-int8 socket)
532 (#.+backend-key-message+
533 (setf (postgresql-connection-pid connection)
534 (read-socket-value-int32 socket)
535 (postgresql-connection-key connection)
536 (read-socket-value-int32 socket)))
537 (#.+ready-for-query-message+
540 (#.+error-response-message+
541 (let ((message (read-socket-value-string socket)))
542 (error 'postgresql-login-error
543 :connection connection
545 (#.+notice-response-message+
546 (let ((message (read-socket-value-string socket)))
547 (warn 'postgresql-warning :connection connection
550 (error 'postgresql-login-error
551 :connection connection
553 "Received garbled message from Postmaster")))))
557 (defun close-postgresql-connection (connection &optional abort)
560 (send-terminate-message (postgresql-connection-socket connection))))
561 (close (postgresql-connection-socket connection)))
563 (defun postgresql-connection-open-p (connection)
564 (let ((socket (postgresql-connection-socket connection)))
565 (and socket (streamp socket) (open-stream-p socket))))
567 (defun ensure-open-postgresql-connection (connection)
568 (unless (postgresql-connection-open-p connection)
569 (reopen-postgresql-connection connection)))
571 (defun process-async-messages (connection)
572 (assert (postgresql-connection-open-p connection))
573 ;; Process any asnychronous messages
574 (loop with socket = (postgresql-connection-socket connection)
575 while (listen socket)
577 (case (read-socket-value-int8 socket)
578 (#.+ready-for-query-message+)
579 (#.+notice-response-message+
580 (let ((message (read-socket-value-string socket)))
581 (warn 'postgresql-warning :connection connection
583 (#.+notification-response-message+
584 (let ((pid (read-socket-value-int32 socket))
585 (message (read-socket-value-string socket)))
586 (when (= pid (postgresql-connection-pid connection))
587 (signal 'postgresql-notification :connection connection
590 (close-postgresql-connection connection)
591 (error 'postgresql-fatal-error :connection connection
592 :message "Received garbled message from backend")))))
594 (defun start-query-execution (connection query)
595 (ensure-open-postgresql-connection connection)
596 (process-async-messages connection)
597 (send-query-message (postgresql-connection-socket connection) query)
598 (force-output (postgresql-connection-socket connection)))
600 (defun wait-for-query-results (connection)
601 (assert (postgresql-connection-open-p connection))
602 (let ((socket (postgresql-connection-socket connection))
606 (case (read-socket-value-int8 socket)
607 (#.+completed-response-message+
608 (return (values :completed (read-socket-value-string socket))))
609 (#.+cursor-response-message+
610 (setq cursor-name (read-socket-value-string socket)))
611 (#.+row-description-message+
612 (let* ((count (read-socket-value-int16 socket))
617 (read-socket-value-string socket)
618 (read-socket-value-int32 socket)
619 (read-socket-value-int16 socket)
620 (read-socket-value-int32 socket)))))
623 (make-postgresql-cursor :connection connection
626 (#.+copy-in-response-message+
628 (#.+copy-out-response-message+
630 (#.+ready-for-query-message+
634 (#.+error-response-message+
635 (let ((message (read-socket-value-string socket)))
637 (make-condition 'postgresql-error
638 :connection connection :message message))))
639 (#.+notice-response-message+
640 (let ((message (read-socket-value-string socket)))
641 (unless (eq :ignore clsql-sys:*backend-warning-behavior*)
642 (warn 'postgresql-warning
643 :connection connection :message message))))
644 (#.+notification-response-message+
645 (let ((pid (read-socket-value-int32 socket))
646 (message (read-socket-value-string socket)))
647 (when (= pid (postgresql-connection-pid connection))
648 (signal 'postgresql-notification :connection connection
651 (close-postgresql-connection connection)
652 (error 'postgresql-fatal-error :connection connection
653 :message "Received garbled message from backend"))))))
655 (defun read-null-bit-vector (socket count)
656 (let ((result (make-array count :element-type 'bit)))
657 (dotimes (offset (ceiling count 8))
658 (loop with byte = (read-byte socket)
659 for index from (* offset 8) below (min count (* (1+ offset) 8))
660 for weight downfrom 7
661 do (setf (aref result index) (ldb (byte 1 weight) byte))))
665 (defun read-field (socket type)
666 (let ((length (- (read-socket-value-int32 socket) 4)))
669 (read-integer-from-socket socket length))
671 (read-double-from-socket socket length))
673 (read-socket-sequence socket length)))))
675 (uffi:def-constant +char-code-zero+ (char-code #\0))
676 (uffi:def-constant +char-code-minus+ (char-code #\-))
677 (uffi:def-constant +char-code-plus+ (char-code #\+))
678 (uffi:def-constant +char-code-period+ (char-code #\.))
679 (uffi:def-constant +char-code-lower-e+ (char-code #\e))
680 (uffi:def-constant +char-code-upper-e+ (char-code #\E))
682 (defun read-integer-from-socket (socket length)
683 (declare (fixnum length))
687 (first-char (read-byte socket))
689 (declare (fixnum first-char))
690 (decf length) ;; read first char
692 ((= first-char +char-code-minus+)
694 ((= first-char +char-code-plus+)
697 (setq val (- first-char +char-code-zero+))))
703 (- (read-byte socket) +char-code-zero+))))
708 (defmacro ascii-digit (int)
709 (let ((offset (gensym)))
710 `(let ((,offset (- ,int +char-code-zero+)))
711 (declare (fixnum ,int ,offset))
712 (if (and (>= ,offset 0)
717 (defun read-double-from-socket (socket length)
718 (declare (fixnum length))
719 (let ((before-decimal 0)
726 (char (read-byte socket)))
727 (declare (fixnum char exponent decimal-count))
728 (decf length) ;; already read first character
730 ((= char +char-code-minus+)
732 ((= char +char-code-plus+)
734 ((= char +char-code-period+)
737 (setq before-decimal (ascii-digit char))
738 (unless before-decimal
739 (error "Unexpected value"))))
743 (setq char (read-byte socket))
744 ;; (format t "~&len:~D, i:~D, char:~D, minusp:~A, decimalp:~A" length i char minusp decimalp)
745 (let ((weight (ascii-digit char)))
747 ((and weight (not decimalp)) ;; before decimal point
748 (setq before-decimal (+ weight (* 10 before-decimal))))
749 ((and weight decimalp) ;; after decimal point
750 (setq after-decimal (+ weight (* 10 after-decimal)))
751 (incf decimal-count))
752 ((and (= char +char-code-period+))
754 ((or (= char +char-code-lower-e+) ;; E is for exponent
755 (= char +char-code-upper-e+))
756 (setq exponent (read-integer-from-socket socket (- length i 1)))
757 (setq exponent (or exponent 0))
760 (break "Unexpected value"))
763 (setq result (* (+ (coerce before-decimal 'double-float)
765 (expt 10 (- decimal-count))))
773 (defun read-double-from-socket (socket length)
774 (let ((result (make-string length)))
775 (read-socket-sequence result socket)
776 (let ((*read-default-float-format* 'double-float))
777 (read-from-string result))))
779 (defun read-cursor-row (cursor types)
780 (let* ((connection (postgresql-cursor-connection cursor))
781 (socket (postgresql-connection-socket connection))
782 (fields (postgresql-cursor-fields cursor)))
783 (assert (postgresql-connection-open-p connection))
785 (let ((code (read-socket-value-int8 socket)))
787 (#.+ascii-row-message+
789 (loop with count = (length fields)
790 with null-vector = (read-null-bit-vector socket count)
792 for null-bit across null-vector
794 for null-p = (zerop null-bit)
799 (read-field socket (nth i types)))))
800 (#.+binary-row-message+
802 (#.+completed-response-message+
803 (return (values nil (read-socket-value-string socket))))
804 (#.+error-response-message+
805 (let ((message (read-socket-value-string socket)))
806 (error 'postgresql-error
807 :connection connection :message message)))
808 (#.+notice-response-message+
809 (let ((message (read-socket-value-string socket)))
810 (warn 'postgresql-warning
811 :connection connection :message message)))
812 (#.+notification-response-message+
813 (let ((pid (read-socket-value-int32 socket))
814 (message (read-socket-value-string socket)))
815 (when (= pid (postgresql-connection-pid connection))
816 (signal 'postgresql-notification :connection connection
819 (close-postgresql-connection connection)
820 (error 'postgresql-fatal-error :connection connection
821 :message "Received garbled message from backend")))))))
823 (defun map-into-indexed (result-seq func seq)
824 (dotimes (i (length seq))
826 (setf (elt result-seq i)
827 (funcall func (elt seq i) i)))
830 (defun copy-cursor-row (cursor sequence types)
831 (let* ((connection (postgresql-cursor-connection cursor))
832 (socket (postgresql-connection-socket connection))
833 (fields (postgresql-cursor-fields cursor)))
834 (assert (= (length fields) (length sequence)))
836 (let ((code (read-socket-value-int8 socket)))
838 (#.+ascii-row-message+
841 (let* ((count (length sequence))
842 (null-vector (read-null-bit-vector socket count)))
845 (if (zerop (elt null-vector i))
846 (setf (elt sequence i) nil)
847 (let ((value (read-field socket (nth i types))))
848 (setf (elt sequence i) value)))))
851 #'(lambda (null-bit i)
854 (read-field socket (nth i types))))
855 (read-null-bit-vector socket (length sequence)))))
856 (#.+binary-row-message+
858 (#.+completed-response-message+
859 (return (values nil (read-socket-value-string socket))))
860 (#.+error-response-message+
861 (let ((message (read-socket-value-string socket)))
862 (error 'postgresql-error
863 :connection connection :message message)))
864 (#.+notice-response-message+
865 (let ((message (read-socket-value-string socket)))
866 (warn 'postgresql-warning
867 :connection connection :message message)))
868 (#.+notification-response-message+
869 (let ((pid (read-socket-value-int32 socket))
870 (message (read-socket-value-string socket)))
871 (when (= pid (postgresql-connection-pid connection))
872 (signal 'postgresql-notification :connection connection
875 (close-postgresql-connection connection)
876 (error 'postgresql-fatal-error :connection connection
877 :message "Received garbled message from backend")))))))
879 (defun skip-cursor-row (cursor)
880 (let* ((connection (postgresql-cursor-connection cursor))
881 (socket (postgresql-connection-socket connection))
882 (fields (postgresql-cursor-fields cursor)))
884 (let ((code (read-socket-value-int8 socket)))
886 (#.+ascii-row-message+
887 (loop for null-bit across
888 (read-null-bit-vector socket (length fields))
890 (unless (zerop null-bit)
891 (let* ((length (read-socket-value-int32 socket)))
892 (loop repeat (- length 4) do (read-byte socket)))))
894 (#.+binary-row-message+
896 (#.+completed-response-message+
897 (return (values nil (read-socket-value-string socket))))
898 (#.+error-response-message+
899 (let ((message (read-socket-value-string socket)))
900 (error 'postgresql-error
901 :connection connection :message message)))
902 (#.+notice-response-message+
903 (let ((message (read-socket-value-string socket)))
904 (warn 'postgresql-warning
905 :connection connection :message message)))
906 (#.+notification-response-message+
907 (let ((pid (read-socket-value-int32 socket))
908 (message (read-socket-value-string socket)))
909 (when (= pid (postgresql-connection-pid connection))
910 (signal 'postgresql-notification :connection connection
913 (close-postgresql-connection connection)
914 (error 'postgresql-fatal-error :connection connection
915 :message "Received garbled message from backend")))))))
917 (defun run-query (connection query &optional (result-types nil))
918 (start-query-execution connection query)
919 (multiple-value-bind (status cursor)
920 (wait-for-query-results connection)
921 (assert (eq status :cursor))
922 (loop for row = (read-cursor-row cursor result-types)
926 (wait-for-query-results connection))))
929 (declaim (ext:maybe-inline read-byte write-byte))