;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
;;;; *************************************************************************
-;;;; FILE IDENTIFICATION
-;;;;
-;;;; Name: sql.lisp
-;;;; Purpose: High-level SQL interface
-;;;; Authors: Kevin M. Rosenberg based on code by Pierre R. Mai
-;;;; Date Started: Feb 2002
;;;;
;;;; $Id$
;;;;
-;;;; This file, part of CLSQL, is Copyright (c) 2002-2004 by Kevin M. Rosenberg
-;;;; and Copyright (c) 1999-2001 by Pierre R. Mai
+;;;; The CLSQL Functional Data Manipulation Language (FDML).
+;;;;
+;;;; This file is part of CLSQL.
;;;;
;;;; CLSQL users are granted the rights to distribute and use this software
;;;; as governed by the terms of the Lisp Lesser GNU Public License
;;;; *************************************************************************
(in-package #:clsql-sys)
+
+;;; Basic operations on databases
+
+
+(defmethod database-query-result-set ((expr %sql-expression) database
+ &key full-set result-types)
+ (database-query-result-set (sql-output expr database) database
+ :full-set full-set :result-types result-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 truncate-database (&key (database *default-database*))
+ (unless (typep database 'database)
+ (clsql-base::signal-no-database-error database))
+ (unless (is-database-open database)
+ (database-reconnect database))
+ (when (db-type-has-views? (database-underlying-type database))
+ (dolist (view (list-views :database database))
+ (drop-view view :database database)))
+ (dolist (table (list-tables :database database))
+ (drop-table table :database database))
+ (dolist (index (list-indexes :database database))
+ (drop-index index :database database))
+ (dolist (seq (list-sequences :database database))
+ (drop-sequence seq :database database)))
+
+(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 database))))
+ (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))
+ (unless into
+ (error 'clsql-sql-syntax-error :reason ":into keyword not supplied"))
+ (let ((insert (make-instance 'sql-insert :into into)))
+ (with-slots (attributes values query)
+ insert
+ (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.")))
+ insert)))
+
+(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)
+ (convert-to-db-default-case
+ (if (equal (symbol-package sym) keyword-package)
+ (concatenate 'string "'" (string sym) "'")
+ (symbol-name sym))
+ database)))
+
+(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 ((self duration) database)
+ (declare (ignore database))
+ (format nil "'~a'" (duration-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) 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 database)
+ (write-string (database-output-sql expr database) *sql-stream*)
+ (values))
-;;; Row processing macro
-
-
-
-(defun lisp->sql-name (field)
- (typecase field
- (string field)
- (symbol (string-upcase (symbol-name field)))
- (cons (cadr field))
- (t (format nil "~A" field))))
-
-(defun field-names (field-forms)
- "Return a list of field name strings from a fields form"
- (loop for field-form in field-forms
- collect
- (lisp->sql-name
- (if (cadr field-form)
- (cadr field-form)
- (car field-form)))))
-
-(defun from-names (from)
- "Return a list of field name strings from a fields form"
- (loop for table in (if (atom from) (list from) from)
- collect (lisp->sql-name table)))
-
-
-(defun where-strings (where)
- (loop for w in (if (atom (car where)) (list where) where)
- collect
- (if (consp w)
- (format nil "~A ~A ~A" (second w) (first w) (third w))
- (format nil "~A" w))))
-
-(defun order-by-strings (order-by)
- (loop for o in order-by
- collect
- (if (atom o)
- (lisp->sql-name o)
- (format nil "~A ~A" (lisp->sql-name (car o))
- (lisp->sql-name (cadr o))))))
-
-(defun query-string (fields from where distinct order-by limit)
- (concatenate
- 'string
- (format nil "select ~A~{~A~^,~} from ~{~A~^ and ~}"
- (if distinct "distinct " "") (field-names fields)
- (from-names from))
- (if where (format nil " where ~{~A~^ ~}"
- (where-strings where)) "")
- (if order-by (format nil " order by ~{~A~^, ~}"
- (order-by-strings order-by)))
- (if limit (format nil " limit ~D" limit) "")))
-
-(defmacro for-each-row (((&rest fields) &key from order-by where distinct limit) &body body)
- (let ((d (gensym "DISTINCT-"))
- (bind-fields (loop for f in fields collect (car f)))
- (w (gensym "WHERE-"))
- (o (gensym "ORDER-BY-"))
- (frm (gensym "FROM-"))
- (l (gensym "LIMIT-"))
- (q (gensym "QUERY-")))
- `(let ((,frm ,from)
- (,w ,where)
- (,d ,distinct)
- (,l ,limit)
- (,o ,order-by))
- (let ((,q (query-string ',fields ,frm ,w ,d ,o ,l)))
- (loop for tuple in (query ,q)
- collect (destructuring-bind ,bind-fields tuple
- ,@body))))))
-
-;;; Marc Battyani : Large objects support
-
-(defun create-large-object (&key (database *default-database*))
- "Creates a new large object in the database and returns the object identifier"
- (database-create-large-object database))
-
-(defun write-large-object (object-id data &key (database *default-database*))
- "Writes data to the large object"
- (database-write-large-object object-id data database))
-
-(defun read-large-object (object-id &key (database *default-database*))
- "Reads the large object content"
- (database-read-large-object object-id database))
-
-(defun delete-large-object (object-id &key (database *default-database*))
- "Deletes the large object in the database"
- (database-delete-large-object object-id database))
+(defmethod output-sql ((expr list) 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)
+(defmethod describe-table ((table sql-create-table)
+ &key (database *default-database*))
+ (database-describe-table
+ database
+ (convert-to-db-default-case
+ (symbol-name (slot-value table 'name)) database)))
+#+nil
+(defmethod add-storage-class ((self database) (class symbol) &key (sequence t))
+ (let ((tablename (view-table (find-class class))))
+ (unless (tablep tablename)
+ (create-view-from-class class)
+ (when sequence
+ (create-sequence-from-class class)))))
+
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