1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
5 ;;;; Name: loop-extension.cl
6 ;;;; Purpose: Extensions to the Loop macro for CMUCL
7 ;;;; Programmer: Pierre R. Mai
9 ;;;; Copyright (c) 1999-2001 Pierre R. Mai
13 ;;;; The functions in this file were orignally distributed in the
14 ;;;; MaiSQL package in the file sql/sql.cl
15 ;;;; *************************************************************************
19 ;;;; MIT-LOOP extension
22 (defun loop-record-iteration-path (variable data-type prep-phrases)
25 (loop for (prep . rest) in prep-phrases
30 (ansi-loop::loop-error
31 "Duplicate OF or IN iteration path: ~S." (cons prep rest)))
32 (setq in-phrase rest))
35 (ansi-loop::loop-error
36 "Duplicate FROM iteration path: ~S." (cons prep rest)))
37 (setq from-phrase rest))
39 (ansi-loop::loop-error
40 "Unknown preposition: ~S." prep))))
42 (ansi-loop::loop-error "Missing OF or IN iteration path."))
44 (setq from-phrase '(*default-database*)))
47 (let ((query-var (ansi-loop::loop-gentemp 'loop-record-))
48 (db-var (ansi-loop::loop-gentemp 'loop-record-database-))
49 (result-set-var (ansi-loop::loop-gentemp
50 'loop-record-result-set-))
51 (step-var (ansi-loop::loop-gentemp 'loop-record-step-)))
52 (push `(when ,result-set-var
53 (database-dump-result-set ,result-set-var ,db-var))
54 ansi-loop::*loop-epilogue*)
55 `(((,variable nil ,data-type) (,query-var ,(first in-phrase))
56 (,db-var ,(first from-phrase))
59 ((multiple-value-bind (%rs %cols)
60 (database-query-result-set ,query-var ,db-var)
61 (setq ,result-set-var %rs ,step-var (make-list %cols))))
64 (not (database-store-next-row ,result-set-var ,db-var ,step-var))
68 (not (database-store-next-row ,result-set-var ,db-var ,step-var))
69 (,variable ,step-var))))
71 (let ((query-var (ansi-loop::loop-gentemp 'loop-record-))
72 (db-var (ansi-loop::loop-gentemp 'loop-record-database-))
73 (result-set-var (ansi-loop::loop-gentemp
74 'loop-record-result-set-)))
75 (push `(when ,result-set-var
76 (database-dump-result-set ,result-set-var ,db-var))
77 ansi-loop::*loop-epilogue*)
78 `(((,variable nil ,data-type) (,query-var ,(first in-phrase))
79 (,db-var ,(first from-phrase))
80 (,result-set-var nil))
81 ((multiple-value-bind (%rs %cols)
82 (database-query-result-set ,query-var ,db-var)
83 (setq ,result-set-var %rs ,variable (make-list %cols))))
86 (not (database-store-next-row ,result-set-var ,db-var ,variable))
90 (not (database-store-next-row ,result-set-var ,db-var ,variable))
94 (ansi-loop::add-loop-path '(record records tuple tuples)
95 'loop-record-iteration-path
96 ansi-loop::*loop-ansi-universe*
97 :preposition-groups '((:of :in) (:from))
98 :inclusive-permitted nil)