+++ /dev/null
-;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
-;;;; *************************************************************************
-;;;; FILE IDENTIFICATION
-;;;;
-;;;; Name: postgresql-sql.sql
-;;;; Purpose: High-level PostgreSQL interface using UFFI
-;;;; Programmers: Kevin M. Rosenberg based on
-;;;; Original code by Pierre R. Mai
-;;;; Date Started: Feb 2002
-;;;;
-;;;; $Id: postgresql-sql.cl,v 1.1 2002/09/18 07:43:41 kevin Exp $
-;;;;
-;;;; This file, part of CLSQL, is Copyright (c) 2002 by Kevin M. Rosenberg
-;;;; and Copyright (c) 1999-2001 by Pierre R. Mai
-;;;;
-;;;; CLSQL users are granted the rights to distribute and use this software
-;;;; as governed by the terms of the Lisp Lesser GNU Public License
-;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
-;;;; *************************************************************************
-
-(declaim (optimize (debug 3) (speed 3) (safety 1) (compilation-speed 0)))
-(in-package :cl-user)
-
-(defpackage :clsql-postgresql
- (:use :common-lisp :clsql-base-sys :postgresql :clsql-uffi)
- (:export #:postgresql-database)
- (:documentation "This is the CLSQL interface to PostgreSQL."))
-
-(in-package :clsql-postgresql)
-
-;;; Field conversion functions
-
-(defun make-type-list-for-auto (num-fields res-ptr)
- (let ((new-types '()))
- (dotimes (i num-fields)
- (declare (fixnum i))
- (let* ((type (PQftype res-ptr i)))
- (push
- (case type
- ((#.pgsql-ftype#bytea
- #.pgsql-ftype#int2
- #.pgsql-ftype#int4)
- :int32)
- (#.pgsql-ftype#int8
- :int64)
- ((#.pgsql-ftype#float4
- #.pgsql-ftype#float8)
- :double)
- (otherwise
- t))
- new-types)))
- (nreverse new-types)))
-
-(defun canonicalize-types (types num-fields res-ptr)
- (if (null types)
- nil
- (let ((auto-list (make-type-list-for-auto num-fields res-ptr)))
- (cond
- ((listp types)
- (canonicalize-type-list types auto-list))
- ((eq types :auto)
- auto-list)
- (t
- nil)))))
-
-(defun tidy-error-message (message)
- (unless (stringp message)
- (setq message (uffi:convert-from-foreign-string message)))
- (let ((message (string-right-trim '(#\Return #\Newline) message)))
- (cond
- ((< (length message) (length "ERROR:"))
- message)
- ((string= message "ERROR:" :end1 6)
- (string-left-trim '(#\Space) (subseq message 6)))
- (t
- message))))
-
-(defmethod database-initialize-database-type ((database-type
- (eql :postgresql)))
- t)
-
-(uffi:def-type pgsql-conn-def pgsql-conn)
-(uffi:def-type pgsql-result-def pgsql-result)
-
-
-(defclass postgresql-database (database)
- ((conn-ptr :accessor database-conn-ptr :initarg :conn-ptr
- :type pgsql-conn-def)))
-
-(defmethod database-type ((database postgresql-database))
- :postgresql)
-
-(defmethod database-name-from-spec (connection-spec (database-type
- (eql :postgresql)))
- (check-connection-spec connection-spec database-type
- (host db user password &optional port options tty))
- (destructuring-bind (host db user password &optional port options tty)
- connection-spec
- (declare (ignore password options tty))
- (concatenate 'string host (if port ":") (if port port) "/" db "/" user)))
-
-
-(defmethod database-connect (connection-spec (database-type (eql :postgresql)))
- (check-connection-spec connection-spec database-type
- (host db user password &optional port options tty))
- (destructuring-bind (host db user password &optional port options tty)
- connection-spec
- (uffi:with-cstrings ((host-native host)
- (user-native user)
- (password-native password)
- (db-native db)
- (port-native port)
- (options-native options)
- (tty-native tty))
- (let ((connection (PQsetdbLogin host-native port-native
- options-native tty-native
- db-native user-native
- password-native)))
- (declare (type pgsql-conn-def connection))
- (when (not (eq (PQstatus connection)
- pgsql-conn-status-type#connection-ok))
- (error 'clsql-connect-error
- :database-type database-type
- :connection-spec connection-spec
- :errno (PQstatus connection)
- :error (tidy-error-message
- (PQerrorMessage connection))))
- (make-instance 'postgresql-database
- :name (database-name-from-spec connection-spec
- database-type)
- :connection-spec connection-spec
- :conn-ptr connection)))))
-
-
-(defmethod database-disconnect ((database postgresql-database))
- (PQfinish (database-conn-ptr database))
- (setf (database-conn-ptr database) nil)
- t)
-
-(defmethod database-query (query-expression (database postgresql-database) types)
- (let ((conn-ptr (database-conn-ptr database)))
- (declare (type pgsql-conn-def conn-ptr))
- (uffi:with-cstring (query-native query-expression)
- (let ((result (PQexec conn-ptr query-native)))
- (when (uffi:null-pointer-p result)
- (error 'clsql-sql-error
- :database database
- :expression query-expression
- :errno nil
- :error (tidy-error-message (PQerrorMessage conn-ptr))))
- (unwind-protect
- (case (PQresultStatus result)
- (#.pgsql-exec-status-type#empty-query
- nil)
- (#.pgsql-exec-status-type#tuples-ok
- (let ((num-fields (PQnfields result)))
- (setq types
- (canonicalize-types types num-fields
- result))
- (loop for tuple-index from 0 below (PQntuples result)
- collect
- (loop for i from 0 below num-fields
- collect
- (if (zerop (PQgetisnull result tuple-index i))
- (convert-raw-field
- (PQgetvalue result tuple-index i)
- types i)
- nil)))))
- (t
- (error 'clsql-sql-error
- :database database
- :expression query-expression
- :errno (PQresultStatus result)
- :error (tidy-error-message
- (PQresultErrorMessage result)))))
- (PQclear result))))))
-
-(defmethod database-execute-command (sql-expression
- (database postgresql-database))
- (let ((conn-ptr (database-conn-ptr database)))
- (declare (type pgsql-conn-def conn-ptr))
- (uffi:with-cstring (sql-native sql-expression)
- (let ((result (PQexec conn-ptr sql-native)))
- (when (uffi:null-pointer-p result)
- (error 'clsql-sql-error
- :database database
- :expression sql-expression
- :errno nil
- :error (tidy-error-message (PQerrorMessage conn-ptr))))
- (unwind-protect
- (case (PQresultStatus result)
- (#.pgsql-exec-status-type#command-ok
- t)
- ((#.pgsql-exec-status-type#empty-query
- #.pgsql-exec-status-type#tuples-ok)
- (warn "Strange result...")
- t)
- (t
- (error 'clsql-sql-error
- :database database
- :expression sql-expression
- :errno (PQresultStatus result)
- :error (tidy-error-message
- (PQresultErrorMessage result)))))
- (PQclear result))))))
-
-(defstruct postgresql-result-set
- (res-ptr (uffi:make-null-pointer 'pgsql-result)
- :type pgsql-result-def)
- (types nil)
- (num-tuples 0 :type integer)
- (num-fields 0 :type integer)
- (tuple-index 0 :type integer))
-
-(defmethod database-query-result-set (query-expression (database postgresql-database)
- &key full-set types)
- (let ((conn-ptr (database-conn-ptr database)))
- (declare (type pgsql-conn-def conn-ptr))
- (uffi:with-cstring (query-native query-expression)
- (let ((result (PQexec conn-ptr query-native)))
- (when (uffi:null-pointer-p result)
- (error 'clsql-sql-error
- :database database
- :expression query-expression
- :errno nil
- :error (tidy-error-message (PQerrorMessage conn-ptr))))
- (case (PQresultStatus result)
- ((#.pgsql-exec-status-type#empty-query
- #.pgsql-exec-status-type#tuples-ok)
- (let ((result-set (make-postgresql-result-set
- :res-ptr result
- :num-fields (PQnfields result)
- :num-tuples (PQntuples result)
- :types (canonicalize-types
- types
- (PQnfields result)
- result))))
- (if full-set
- (values result-set
- (PQnfields result)
- (PQntuples result))
- (values result-set
- (PQnfields result)))))
- (t
- (unwind-protect
- (error 'clsql-sql-error
- :database database
- :expression query-expression
- :errno (PQresultStatus result)
- :error (tidy-error-message
- (PQresultErrorMessage result)))
- (PQclear result))))))))
-
-(defmethod database-dump-result-set (result-set (database postgresql-database))
- (let ((res-ptr (postgresql-result-set-res-ptr result-set)))
- (declare (type pgsql-result-def res-ptr))
- (PQclear res-ptr)
- t))
-
-(defmethod database-store-next-row (result-set (database postgresql-database)
- list)
- (let ((result (postgresql-result-set-res-ptr result-set))
- (types (postgresql-result-set-types result-set)))
- (declare (type pgsql-result-def result))
- (if (>= (postgresql-result-set-tuple-index result-set)
- (postgresql-result-set-num-tuples result-set))
- nil
- (loop with tuple-index = (postgresql-result-set-tuple-index result-set)
- for i from 0 below (postgresql-result-set-num-fields result-set)
- for rest on list
- do
- (setf (car rest)
- (if (zerop (PQgetisnull result tuple-index i))
- (convert-raw-field
- (PQgetvalue result tuple-index i)
- types i)
- nil))
- finally
- (incf (postgresql-result-set-tuple-index result-set))
- (return list)))))
-
-;;; Large objects support (Marc B)
-
-(defmethod database-create-large-object ((database postgresql-database))
- (lo-create (database-conn-ptr database)
- (logior postgresql::+INV_WRITE+ postgresql::+INV_READ+)))
-
-
-#+mb-original
-(defmethod database-write-large-object (object-id (data string) (database postgresql-database))
- (let ((ptr (database-conn-ptr database))
- (length (length data))
- (result nil)
- (fd nil))
- (with-transaction (:database database)
- (unwind-protect
- (progn
- (setf fd (lo-open ptr object-id postgresql::+INV_WRITE+))
- (when (>= fd 0)
- (when (= (lo-write ptr fd data length) length)
- (setf result t))))
- (progn
- (when (and fd (>= fd 0))
- (lo-close ptr fd))
- )))
- result))
-
-(defmethod database-write-large-object (object-id (data string) (database postgresql-database))
- (let ((ptr (database-conn-ptr database))
- (length (length data))
- (result nil)
- (fd nil))
- (database-execute-command "begin" database)
- (unwind-protect
- (progn
- (setf fd (lo-open ptr object-id postgresql::+INV_WRITE+))
- (when (>= fd 0)
- (when (= (lo-write ptr fd data length) length)
- (setf result t))))
- (progn
- (when (and fd (>= fd 0))
- (lo-close ptr fd))
- (database-execute-command (if result "commit" "rollback") database)))
- result))
-
-;; (MB) the begin/commit/rollback stuff will be removed when with-transaction wil be implemented
-;; (KMR) Can't use with-transaction since that function is in high-level code
-(defmethod database-read-large-object (object-id (database postgresql-database))
- (let ((ptr (database-conn-ptr database))
- (buffer nil)
- (result nil)
- (length 0)
- (fd nil))
- (unwind-protect
- (progn
- (database-execute-command "begin" database)
- (setf fd (lo-open ptr object-id postgresql::+INV_READ+))
- (when (>= fd 0)
- (setf length (lo-lseek ptr fd 0 2))
- (lo-lseek ptr fd 0 0)
- (when (> length 0)
- (setf buffer (uffi:allocate-foreign-string
- length :unsigned t))
- (when (= (lo-read ptr fd buffer length) length)
- (setf result (uffi:convert-from-foreign-string
- buffer :length length :null-terminated-p nil))))))
- (progn
- (when buffer (uffi:free-foreign-object buffer))
- (when (and fd (>= fd 0)) (lo-close ptr fd))
- (database-execute-command (if result "commit" "rollback") database)))
- result))
-
-(defmethod database-delete-large-object (object-id (database postgresql-database))
- (lo-unlink (database-conn-ptr database) object-id))
-
-(when (clsql-base-sys:database-type-library-loaded :postgresql)
- (clsql-base-sys:initialize-database-type :database-type :postgresql)
- (pushnew :postgresql cl:*features*))
projects / clsql.git / blobdiff