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;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
;;;; *************************************************************************
;;;; FILE IDENTIFICATION
;;;;
;;;; Name: postgresql-socket-sql.sql
;;;; Purpose: High-level PostgreSQL interface using socket
;;;; Authors: Kevin M. Rosenberg based on original code by Pierre R. Mai
;;;; Created: Feb 2002
;;;;
;;;; $Id$
;;;;
;;;; This file, part of CLSQL, is Copyright (c) 2002-2007 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.
;;;; *************************************************************************
(in-package #:cl-user)
(defpackage :clsql-postgresql-socket3
(:use #:common-lisp #:clsql-sys #:postgresql-socket3)
(:export #:postgresql-socket3-database)
(:documentation "This is the CLSQL socket interface (protocol version 3) to PostgreSQL."))
(in-package #:clsql-postgresql-socket3)
(defvar *sqlreader* (cl-postgres:copy-sql-readtable))
(let ((dt-fn (lambda (useconds-since-2000)
(let ((sec (truncate
(/ useconds-since-2000
1000000)))
(usec (mod useconds-since-2000
1000000)))
(clsql:make-time :year 2000 :second sec :usec usec)))))
(cl-postgres:set-sql-datetime-readers
:table *sqlreader*
:date (lambda (days-since-2000)
(clsql:make-date :year 2000 :day (+ 1 days-since-2000)))
:timestamp dt-fn
:timestamp-with-timezone dt-fn))
;; interface foreign library loading routines
(clsql-sys:database-type-load-foreign :postgresql-socket3)
(defmethod database-initialize-database-type ((database-type
(eql :postgresql-socket3)))
t)
;; Field type conversion
(defun convert-to-clsql-warning (database condition)
(ecase *backend-warning-behavior*
(:warn
(warn 'sql-database-warning :database database
:message (cl-postgres:database-error-message condition)))
(:error
(error 'sql-database-error :database database
:message (format nil "Warning upgraded to error: ~A"
(cl-postgres:database-error-message condition))))
((:ignore nil)
;; do nothing
)))
(defun convert-to-clsql-error (database expression condition)
(error 'sql-database-data-error
:database database
:expression expression
:error-id (type-of condition)
:message (cl-postgres:database-error-message condition)))
(defmacro with-postgresql-handlers
((database &optional expression)
&body body)
(let ((database-var (gensym))
(expression-var (gensym)))
`(let ((,database-var ,database)
(,expression-var ,expression))
(handler-bind ((postgresql-warning
(lambda (c)
(convert-to-clsql-warning ,database-var c)))
(cl-postgres:database-error
(lambda (c)
(convert-to-clsql-error
,database-var ,expression-var c))))
,@body))))
(defclass postgresql-socket3-database (generic-postgresql-database)
((connection :accessor database-connection :initarg :connection
:type cl-postgres:database-connection)))
(defmethod database-type ((database postgresql-socket3-database))
:postgresql-socket3)
(defmethod database-name-from-spec (connection-spec (database-type (eql :postgresql-socket3)))
(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
(etypecase host
(null
"localhost")
(keyword "unix")
(pathname (namestring host))
(string host))
(when port
(concatenate 'string
":"
(etypecase port
(integer (write-to-string port))
(string port))))
"/" db "/" user)))
(defmethod database-connect (connection-spec
(database-type (eql :postgresql-socket3)))
(check-connection-spec connection-spec database-type
(host db user password &optional port options tty))
(destructuring-bind (host db user password &optional
(port +postgresql-server-default-port+)
(options "") (tty ""))
connection-spec
(declare (ignore options tty))
(handler-case
(handler-bind ((warning
(lambda (c)
(warn 'sql-warning
:format-control "~A"
:format-arguments
(list (princ-to-string c))))))
(cl-postgres:open-database db user password host port))
(cl-postgres:database-error (c)
;; Connect failed
(error 'sql-connection-error
:database-type database-type
:connection-spec connection-spec
:error-id (type-of c)
:message (cl-postgres:database-error-message c)))
(:no-error (connection)
;; Success, make instance
(make-instance 'postgresql-socket3-database
:name (database-name-from-spec connection-spec database-type)
:database-type :postgresql-socket3
:connection-spec connection-spec
:connection connection)))))
(defmethod database-disconnect ((database postgresql-socket3-database))
(cl-postgres:close-database (database-connection database))
t)
(defvar *include-field-names* nil)
;; THE FOLLOWING MACRO EXPANDS TO THE FUNCTION BELOW IT,
;; BUT TO GET null CONVENTIONS CORRECT I NEEDED TO TWEAK THE EXPANSION
;;
;; (cl-postgres:def-row-reader clsql-default-row-reader (fields)
;; (values (loop :while (cl-postgres:next-row)
;; :collect (loop :for field :across fields
;; :collect (cl-postgres:next-field field)))
;; (when *include-field-names*
;; (loop :for field :across fields
;; :collect (cl-postgres:field-name field)))))
(defun clsql-default-row-reader (stream fields)
(declare (type stream stream)
(type (simple-array cl-postgres::field-description) fields))
(flet ((cl-postgres:next-row ()
(cl-postgres::look-for-row stream))
(cl-postgres:next-field (cl-postgres::field)
(declare (type cl-postgres::field-description cl-postgres::field))
(let ((cl-postgres::size (cl-postgres::read-int4 stream)))
(declare (type (signed-byte 32) cl-postgres::size))
(if (eq cl-postgres::size -1)
nil
(funcall (cl-postgres::field-interpreter cl-postgres::field)
stream cl-postgres::size)))))
(let ((results (loop :while (cl-postgres:next-row)
:collect (loop :for field :across fields
:collect (cl-postgres:next-field field))))
(col-names (when *include-field-names*
(loop :for field :across fields
:collect (cl-postgres:field-name field)))))
;;multiple return values were not working here
(list results col-names))))
(defmethod database-query ((expression string) (database postgresql-socket3-database) result-types field-names)
(let ((connection (database-connection database))
(cl-postgres:*sql-readtable* *sqlreader*))
(with-postgresql-handlers (database expression)
(let ((*include-field-names* field-names))
(apply #'values (cl-postgres:exec-query connection expression #'clsql-default-row-reader)))
)))
(defmethod query ((obj command-object) &key (database *default-database*)
(result-types :auto) (flatp nil) (field-names t))
(clsql-sys::record-sql-command
(format nil "~&~A~&{Params: ~{~A~^, ~}}"
(expression obj)
(parameters obj))
database)
(multiple-value-bind (rows names)
(database-query obj database result-types field-names)
(let ((result (if (and flatp (= 1 (length (car rows))))
(mapcar #'car rows)
rows)))
(clsql-sys::record-sql-result result database)
(if field-names
(values result names)
result))))
(defmethod database-query ((obj command-object) (database postgresql-socket3-database) result-types field-names)
(let ((connection (database-connection database))
(cl-postgres:*sql-readtable* *sqlreader*))
(with-postgresql-handlers (database obj)
(let ((*include-field-names* field-names))
(unless (has-been-prepared obj)
(cl-postgres:prepare-query connection (prepared-name obj) (expression obj))
(setf (has-been-prepared obj) T))
(apply #'values (cl-postgres:exec-prepared
connection
(prepared-name obj)
(parameters obj)
#'clsql-default-row-reader))))))
(defmethod database-execute-command
((expression string) (database postgresql-socket3-database))
(let ((connection (database-connection database)))
(with-postgresql-handlers (database expression)
;; return row count?
(second (multiple-value-list (cl-postgres:exec-query connection expression))))))
(defmethod execute-command ((obj command-object)
&key (database *default-database*))
(clsql-sys::record-sql-command (expression obj) database)
(let ((res (database-execute-command obj database)))
(clsql-sys::record-sql-result res database)
;; return row count?
res))
(defmethod database-execute-command
((obj command-object) (database postgresql-socket3-database))
(let ((connection (database-connection database)))
(with-postgresql-handlers (database obj)
(unless (has-been-prepared obj)
(cl-postgres:prepare-query connection (prepared-name obj) (expression obj))
(setf (has-been-prepared obj) T))
(second (multiple-value-list (cl-postgres:exec-prepared connection (prepared-name obj) (parameters obj)))))))
;;;; Cursoring interface
(defmethod database-query-result-set ((expression string)
(database postgresql-socket3-database)
&key full-set result-types)
(declare (ignore result-types))
(declare (ignore full-set))
(error "Cursoring interface is not supported for postgresql-socket3-database try cl-postgres:exec-query with a custom row-reader"))
(defmethod database-dump-result-set (result-set
(database postgresql-socket3-database))
(error "Cursoring interface is not supported for postgresql-socket3-database try cl-postgres:exec-query with a custom row-reader")
T)
(defmethod database-store-next-row (result-set
(database postgresql-socket3-database)
list)
(error "Cursoring interface is not supported for postgresql-socket3-database try cl-postgres:exec-query with a custom row-reader"))
;;;;;;;;;;;;;;;;;;;;;;;;;;
(defmethod database-create (connection-spec (type (eql :postgresql-socket3)))
(destructuring-bind (host name user password &optional port options tty) connection-spec
(declare (ignore port options tty))
(let ((database (database-connect (list host "postgres" user password)
type)))
(setf (slot-value database 'clsql-sys::state) :open)
(unwind-protect
(database-execute-command (format nil "create database ~A" name) database)
(database-disconnect database)))))
(defmethod database-destroy (connection-spec (type (eql :postgresql-socket3)))
(destructuring-bind (host name user password &optional port options tty) connection-spec
(declare (ignore port options tty))
(let ((database (database-connect (list host "postgres" user password)
type)))
(setf (slot-value database 'clsql-sys::state) :open)
(unwind-protect
(database-execute-command (format nil "drop database ~A" name) database)
(database-disconnect database)))))
(defmethod database-probe (connection-spec (type (eql :postgresql-socket3)))
(when (find (second connection-spec) (database-list connection-spec type)
:test #'string-equal)
t))
;; Database capabilities
(defmethod db-backend-has-create/destroy-db? ((db-type (eql :postgresql-socket3)))
nil)
(defmethod db-type-has-fancy-math? ((db-type (eql :postgresql-socket3)))
t)
(defmethod db-type-default-case ((db-type (eql :postgresql-socket3)))
:lower)
(defmethod database-underlying-type ((database postgresql-socket3-database))
:postgresql)
(when (clsql-sys:database-type-library-loaded :postgresql-socket3)
(clsql-sys:initialize-database-type :database-type :postgresql-socket3))
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