sql/loop-extension.lisp

   1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
   2 ;;;; *************************************************************************
   3 ;;;; FILE IDENTIFICATION
   4 ;;;;
   5 ;;;; Name:    loop-extension.lisp
   6 ;;;; Purpose: Extensions to the Loop macro for CLSQL
   7 ;;;;
   8 ;;;; Copyright (c) 2001-2006 Kevin Rosenberg and (c) 1999-2001 Pierre R. Mai
   9 ;;;;
  10 ;;;; $Id$
  11 ;;;; *************************************************************************
  12
  13 (in-package #:clsql-sys)
  14
  15 #+(or allegro sbcl)
  16 (eval-when (:compile-toplevel :load-toplevel :execute)
  17   (defpackage #:ansi-loop
  18     (:import-from #+sbcl #:sb-loop #+allegro #:excl
  19                   #:*loop-epilogue*
  20                   #:*loop-ansi-universe*
  21                   #:add-loop-path)))
  22
  23 #+(or allegro sbcl)
  24 (defun ansi-loop::loop-gentemp (&optional (pref 'loopva-))
  25   (gensym (string pref)))
  26
  27 #+clisp
  28 (eval-when (:compile-toplevel :load-toplevel :execute)
  29   (when (find-package "ANSI-LOOP") (push :clisp-aloop cl:*features*)))
  30
  31 #+(or allegro clisp-aloop cmu openmcl sbcl scl)
  32 (defun loop-record-iteration-path (variable data-type prep-phrases)
  33   (let ((in-phrase nil)
  34         (from-phrase nil))
  35     (loop for (prep . rest) in prep-phrases
  36           do
  37           (case prep
  38             ((:in :of)
  39              (when in-phrase
  40                (error 'clsql:sql-user-error
  41                       :message
  42                       (format nil
  43                               "Duplicate OF or IN iteration path: ~S."
  44                               (cons prep rest))))
  45              (setq in-phrase rest))
  46             ((:from)
  47              (when from-phrase
  48                (error 'clsql:sql-user-error
  49                       :message
  50                       (format nil
  51                               "Duplicate FROM iteration path: ~S."
  52                               (cons prep rest))))
  53              (setq from-phrase rest))
  54             (t
  55              (error 'clsql:sql-user-error
  56                     :message
  57                     (format nil"Unknown preposition: ~S." prep)))))
  58     (unless in-phrase
  59       (error 'clsql:sql-user-error
  60              :message "Missing OF or IN iteration path."))
  61     (unless from-phrase
  62       (setq from-phrase '(*default-database*)))
  63
  64     (unless (consp variable)
  65       (setq variable (list variable)))
  66
  67     (cond
  68      ;; object query
  69      ((and (consp (first in-phrase))
  70            (string-equal "sql-query" (symbol-name (caar in-phrase)))
  71            (consp (second (first in-phrase)))
  72            (eq 'quote (first (second (first in-phrase))))
  73            (symbolp (second (second (first in-phrase)))))
  74
  75        (let ((result-var (ansi-loop::loop-gentemp
  76                               'loop-record-result-))
  77              (step-var (ansi-loop::loop-gentemp 'loop-record-step-)))
  78          `(((,variable nil ,@(and data-type (list data-type)))
  79             (,result-var (query ,(first in-phrase)))
  80             (,step-var nil))
  81            ()
  82            ()
  83            ()
  84            (if (null ,result-var)
  85                t
  86                (progn
  87                  (setq ,step-var (first ,result-var))
  88                  (setq ,result-var (rest ,result-var))
  89                  nil))
  90            (,variable ,step-var)
  91            (null ,result-var)
  92            ()
  93            (if (null ,result-var)
  94                t
  95                (progn
  96                  (setq ,step-var (first ,result-var))
  97                  (setq ,result-var (rest ,result-var))
  98                  nil))
  99            (,variable ,step-var))))
 100
 101       ((consp variable)
 102        (let ((query-var (ansi-loop::loop-gentemp 'loop-record-))
 103              (db-var (ansi-loop::loop-gentemp 'loop-record-database-))
 104              (result-set-var (ansi-loop::loop-gentemp
 105                               'loop-record-result-set-))
 106              (step-var (ansi-loop::loop-gentemp 'loop-record-step-)))
 107          (push `(when ,result-set-var
 108                   (database-dump-result-set ,result-set-var ,db-var))
 109                ansi-loop::*loop-epilogue*)
 110          `(((,variable nil ,@(and data-type (list data-type)))
 111             (,query-var ,(first in-phrase))
 112             (,db-var ,(first from-phrase))
 113             (,result-set-var nil)
 114             (,step-var nil))
 115            ((multiple-value-bind (%rs %cols)
 116                 (database-query-result-set ,query-var ,db-var :result-types :auto)
 117               (setq ,result-set-var %rs ,step-var (make-list %cols))))
 118            ()
 119            ()
 120            (not (database-store-next-row ,result-set-var ,db-var ,step-var))
 121            (,variable ,step-var)
 122            (not ,result-set-var)
 123            ()
 124            (not (database-store-next-row ,result-set-var ,db-var ,step-var))
 125            (,variable ,step-var)))))))
 126
 127 #+(or allegro clisp-aloop cmu openmcl sbcl scl)
 128 (ansi-loop::add-loop-path '(record records tuple tuples)
 129                           'loop-record-iteration-path
 130                           ansi-loop::*loop-ansi-universe*
 131                           :preposition-groups '((:of :in) (:from))
 132                           :inclusive-permitted nil)
 133
 134 #+lispworks
 135 (cl-user::define-loop-method (record records tuple tuples) clsql-loop-method
 136   (in of from))
 137
 138 #+lispworks
 139 (defun clsql-loop-method (method-name iter-var iter-var-data-type
 140                           prep-phrases inclusive? allowed-preps
 141                           method-specific-data)
 142   (declare (ignore method-name inclusive? allowed-preps method-specific-data))
 143   (let ((in-phrase nil)
 144         (from-phrase nil))
 145     (loop for (prep . rest) in prep-phrases
 146           do
 147           (cond
 148             ((or (eq prep 'in) (eq prep 'of))
 149              (when in-phrase
 150                (error 'clsql:sql-user-error
 151                       :message
 152                       (format nil "Duplicate OF or IN iteration path: ~S."
 153                               (cons prep rest))))
 154              (setq in-phrase rest))
 155             ((eq prep 'from)
 156              (when from-phrase
 157                (error 'clsql:sql-user-error
 158                       :message
 159                       (format nil "Duplicate FROM iteration path: ~S."
 160                               (cons prep rest))))
 161              (setq from-phrase rest))
 162             (t
 163              (error 'clsql:sql-user-error
 164                     :message (format nil "Unknown preposition: ~S." prep)))))
 165     (unless in-phrase
 166       (error 'clsql:sql-user-error
 167              :message "Missing OF or IN iteration path."))
 168     (unless from-phrase
 169       (setq from-phrase '(clsql:*default-database*)))
 170
 171     (unless (consp iter-var)
 172       (setq iter-var (list iter-var)))
 173
 174     (cond
 175      ;; object query
 176      ((and (consp in-phrase)
 177            (string-equal "sql-query" (symbol-name (car in-phrase)))
 178            (consp (second in-phrase))
 179            (eq 'quote (first (second in-phrase)))
 180            (symbolp (second (second in-phrase))))
 181
 182        (let ((result-var (gensym "LOOP-RECORD-RESULT-"))
 183              (step-var (gensym "LOOP-RECORD-STEP-")))
 184          (values
 185           t
 186           nil
 187           `(,@(mapcar (lambda (v) `(,v nil)) iter-var)
 188               (,result-var (clsql:query ,in-phrase))
 189               (,step-var nil))
 190           ()
 191           ()
 192           ()
 193           `((if (null ,result-var)
 194                 t
 195                 (progn
 196                   (setq ,step-var (first ,result-var))
 197                   (setq ,result-var (rest ,result-var))
 198                   nil)))
 199           `(,iter-var ,step-var)
 200           `((if (null ,result-var)
 201                 t
 202                 (progn
 203                   (setq ,step-var (first ,result-var))
 204                   (setq ,result-var (rest ,result-var))
 205                   nil)))
 206            `(,iter-var ,step-var)
 207            ()
 208            ()
 209            )))
 210
 211       ((consp iter-var)
 212        (let ((query-var (gensym "LOOP-RECORD-"))
 213              (db-var (gensym "LOOP-RECORD-DATABASE-"))
 214              (result-set-var (gensym "LOOP-RECORD-RESULT-SET-"))
 215              (step-var (gensym "LOOP-RECORD-STEP-")))
 216          (values
 217           t
 218           nil
 219           `(,@(mapcar (lambda (v) `(,v nil)) iter-var)
 220             (,query-var ,in-phrase)
 221             (,db-var ,(first from-phrase))
 222             (,result-set-var nil)
 223             (,step-var nil))
 224           `((multiple-value-bind (%rs %cols)
 225                 (database-query-result-set ,query-var ,db-var :result-types :auto)
 226               (setq ,result-set-var %rs ,step-var (make-list %cols))))
 227           ()
 228           ()
 229           `((unless (database-store-next-row ,result-set-var ,db-var ,step-var)
 230               (when ,result-set-var
 231                 (database-dump-result-set ,result-set-var ,db-var))
 232               t))
 233           `(,iter-var ,step-var)
 234           `((unless (database-store-next-row ,result-set-var ,db-var ,step-var)
 235               (when ,result-set-var
 236                 (database-dump-result-set ,result-set-var ,db-var))
 237               t))
 238           `(,iter-var ,step-var)
 239           ()
 240           ()))))))
 241
 242
 243 #+clisp-aloop
 244 (eval-when (:compile-toplevel :load-toplevel :execute)
 245   (setq cl:*features* (delete :clisp-aloop cl:*features*)))
 246