+++ /dev/null
-;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
-;;;; ======================================================================
-;;;; File: sql.lisp
-;;;; Updated: <04/04/2004 12:05:32 marcusp>
-;;;; ======================================================================
-;;;;
-;;;; Description ==========================================================
-;;;; ======================================================================
-;;;;
-;;;; The CLSQL-USQL Functional Data Manipulation Language (FDML).
-;;;;
-;;;; ======================================================================
-
-(in-package :clsql-usql-sys)
-
-
-;;; Basic operations on databases
-
-
-(defmethod database-query-result-set ((expr %sql-expression) database
- &key full-set types)
- (database-query-result-set (sql-output expr database) database
- :full-set full-set :types types))
-
-(defmethod execute-command ((expr %sql-expression)
- &key (database *default-database*))
- (execute-command (sql-output expr database) :database database)
- (values))
-
-
-
-(defmethod query ((expr %sql-expression) &key (database *default-database*)
- (result-types nil) (flatp nil))
- (query (sql-output expr database) :database database :flatp flatp
- :result-types result-types))
-
-(defun print-query (query-exp &key titles (formats t) (sizes t) (stream t)
- (database *default-database*))
- "The PRINT-QUERY function takes a symbolic SQL query expression and
-formatting information and prints onto STREAM a table containing the
-results of the query. A list of strings to use as column headings is
-given by TITLES, which has a default value of NIL. The FORMATS
-argument is a list of format strings used to print each attribute, and
-has a default value of T, which means that ~A or ~VA are used if sizes
-are provided or computed. The field sizes are given by SIZES. It has a
-default value of T, which specifies that minimum sizes are
-computed. The output stream is given by STREAM, which has a default
-value of T. This specifies that *STANDARD-OUTPUT* is used."
- (flet ((compute-sizes (data)
- (mapcar #'(lambda (x) (apply #'max (mapcar #'length x)))
- (apply #'mapcar (cons #'list data))))
- (format-record (record control sizes)
- (format stream "~&~?" control
- (if (null sizes) record
- (mapcan #'(lambda (s f) (list s f)) sizes record)))))
- (let* ((query-exp (etypecase query-exp
- (string query-exp)
- (sql-query (sql-output query-exp))))
- (data (query query-exp :database database))
- (sizes (if (or (null sizes) (listp sizes)) sizes
- (compute-sizes (if titles (cons titles data) data))))
- (formats (if (or (null formats) (not (listp formats)))
- (make-list (length (car data)) :initial-element
- (if (null sizes) "~A " "~VA "))
- formats))
- (control-string (format nil "~{~A~}" formats)))
- (when titles (format-record titles control-string sizes))
- (dolist (d data (values)) (format-record d control-string sizes)))))
-
-(defun insert-records (&key (into nil)
- (attributes nil)
- (values nil)
- (av-pairs nil)
- (query nil)
- (database *default-database*))
- "Inserts a set of values into a table. The records created contain
-values for attributes (or av-pairs). The argument VALUES is a list of
-values. If ATTRIBUTES is supplied then VALUES must be a corresponding
-list of values for each of the listed attribute names. If AV-PAIRS is
-non-nil, then both ATTRIBUTES and VALUES must be nil. If QUERY is
-non-nil, then neither VALUES nor AV-PAIRS should be. QUERY should be a
-query expression, and the attribute names in it must also exist in the
-table INTO. The default value of DATABASE is *DEFAULT-DATABASE*."
- (let ((stmt (make-sql-insert :into into :attrs attributes
- :vals values :av-pairs av-pairs
- :subquery query)))
- (execute-command stmt :database database)))
-
-(defun make-sql-insert (&key (into nil)
- (attrs nil)
- (vals nil)
- (av-pairs nil)
- (subquery nil))
- (if (null into)
- (error 'clsql-sql-syntax-error :reason ":into keyword not supplied"))
- (let ((ins (make-instance 'sql-insert :into into)))
- (with-slots (attributes values query)
- ins
- (cond ((and vals (not attrs) (not query) (not av-pairs))
- (setf values vals))
- ((and vals attrs (not subquery) (not av-pairs))
- (setf attributes attrs)
- (setf values vals))
- ((and av-pairs (not vals) (not attrs) (not subquery))
- (setf attributes (mapcar #'car av-pairs))
- (setf values (mapcar #'cadr av-pairs)))
- ((and subquery (not vals) (not attrs) (not av-pairs))
- (setf query subquery))
- ((and subquery attrs (not vals) (not av-pairs))
- (setf attributes attrs)
- (setf query subquery))
- (t
- (error 'clsql-sql-syntax-error
- :reason "bad or ambiguous keyword combination.")))
- ins)))
-
-(defun delete-records (&key (from nil)
- (where nil)
- (database *default-database*))
- "Deletes rows from a database table specified by FROM in which the
-WHERE condition is true. The argument DATABASE specifies a database
-from which the records are to be removed, and defaults to
-*default-database*."
- (let ((stmt (make-instance 'sql-delete :from from :where where)))
- (execute-command stmt :database database)))
-
-(defun update-records (table &key
- (attributes nil)
- (values nil)
- (av-pairs nil)
- (where nil)
- (database *default-database*))
- "Changes the values of existing fields in TABLE with columns
-specified by ATTRIBUTES and VALUES (or AV-PAIRS) where the WHERE
-condition is true."
- (when av-pairs
- (setf attributes (mapcar #'car av-pairs)
- values (mapcar #'cadr av-pairs)))
- (let ((stmt (make-instance 'sql-update :table table
- :attributes attributes
- :values values
- :where where)))
- (execute-command stmt :database database)))
-
-
-;; iteration
-
-;; output-sql
-
-(defmethod database-output-sql ((str string) database)
- (declare (ignore database)
- (optimize (speed 3) (safety 1) #+cmu (extensions:inhibit-warnings 3))
- (type (simple-array * (*)) str))
- (let ((len (length str)))
- (declare (type fixnum len))
- (cond ((= len 0)
- +empty-string+)
- ((and (null (position #\' str))
- (null (position #\\ str)))
- (concatenate 'string "'" str "'"))
- (t
- (let ((buf (make-string (+ (* len 2) 2) :initial-element #\')))
- (do* ((i 0 (incf i))
- (j 1 (incf j)))
- ((= i len) (subseq buf 0 (1+ j)))
- (declare (type integer i j))
- (let ((char (aref str i)))
- (cond ((eql char #\')
- (setf (aref buf j) #\\)
- (incf j)
- (setf (aref buf j) #\'))
- ((eql char #\\)
- (setf (aref buf j) #\\)
- (incf j)
- (setf (aref buf j) #\\))
- (t
- (setf (aref buf j) char))))))))))
-
-(let ((keyword-package (symbol-package :foo)))
- (defmethod database-output-sql ((sym symbol) database)
- (declare (ignore database))
- (if (equal (symbol-package sym) keyword-package)
- (concatenate 'string "'" (string sym) "'")
- (symbol-name sym))))
-
-(defmethod database-output-sql ((tee (eql t)) database)
- (declare (ignore database))
- "'Y'")
-
-(defmethod database-output-sql ((num number) database)
- (declare (ignore database))
- (princ-to-string num))
-
-(defmethod database-output-sql ((arg list) database)
- (if (null arg)
- "NULL"
- (format nil "(~{~A~^,~})" (mapcar #'(lambda (val)
- (sql-output val database))
- arg))))
-
-(defmethod database-output-sql ((arg vector) database)
- (format nil "~{~A~^,~}" (map 'list #'(lambda (val)
- (sql-output val database))
- arg)))
-
-(defmethod database-output-sql ((self wall-time) database)
- (declare (ignore database))
- (db-timestring self))
-
-(defmethod database-output-sql (thing database)
- (if (or (null thing)
- (eq 'null thing))
- "NULL"
- (error 'clsql-simple-error
- :format-control
- "No type conversion to SQL for ~A is defined for DB ~A."
- :format-arguments (list (type-of thing) (type-of database)))))
-
-(defmethod output-sql-hash-key ((arg vector) &optional database)
- (list 'vector (map 'list (lambda (arg)
- (or (output-sql-hash-key arg database)
- (return-from output-sql-hash-key nil)))
- arg)))
-
-(defmethod output-sql (expr &optional (database *default-database*))
- (write-string (database-output-sql expr database) *sql-stream*)
- t)
-
-(defmethod output-sql ((expr list) &optional (database *default-database*))
- (if (null expr)
- (write-string +null-string+ *sql-stream*)
- (progn
- (write-char #\( *sql-stream*)
- (do ((item expr (cdr item)))
- ((null (cdr item))
- (output-sql (car item) database))
- (output-sql (car item) database)
- (write-char #\, *sql-stream*))
- (write-char #\) *sql-stream*)))
- t)
-
-
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