;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
-;;;; ======================================================================
-;;;; File: sql.lisp
-;;;; Updated: <04/04/2004 12:05:32 marcusp>
-;;;; ======================================================================
+;;;; *************************************************************************
;;;;
-;;;; Description ==========================================================
-;;;; ======================================================================
+;;;; $Id$
;;;;
-;;;; The CLSQL-USQL Functional Data Manipulation Language (FDML).
+;;;; 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
+;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
+;;;; *************************************************************************
(in-package #:clsql-sys)
-
;;; Basic operations on databases
-
(defmethod database-query-result-set ((expr %sql-expression) database
- &key full-set types)
+ &key full-set result-types)
(database-query-result-set (sql-output expr database) database
- :full-set full-set :types types))
+ :full-set full-set :result-types result-types))
(defmethod execute-command ((expr %sql-expression)
&key (database *default-database*))
(values))
-
(defmethod query ((expr %sql-expression) &key (database *default-database*)
- (result-types nil) (flatp nil))
+ (result-types :auto) (flatp nil) (field-names t))
(query (sql-output expr database) :database database :flatp flatp
- :result-types result-types))
+ :result-types result-types :field-names field-names))
+
+(defmethod query ((expr sql-object-query) &key (database *default-database*)
+ (result-types :auto) (flatp nil))
+ (declare (ignore result-types))
+ (apply #'select (append (slot-value expr 'objects)
+ (slot-value expr 'exp)
+ (when (slot-value expr 'refresh)
+ (list :refresh (sql-output expr database)))
+ (when (or flatp (slot-value expr 'flatp) )
+ (list :flatp t))
+ (list :database database))))
+
+(defun truncate-database (&key (database *default-database*))
+ (unless (typep database 'database)
+ (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*))
(mapcan #'(lambda (s f) (list s f)) sizes record)))))
(let* ((query-exp (etypecase query-exp
(string query-exp)
- (sql-query (sql-output 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))))
(vals nil)
(av-pairs nil)
(subquery nil))
- (if (null into)
+ (unless into
(error 'clsql-sql-syntax-error :reason ":into keyword not supplied"))
- (let ((ins (make-instance 'sql-insert :into into)))
+ (let ((insert (make-instance 'sql-insert :into into)))
(with-slots (attributes values query)
- ins
+ insert
(cond ((and vals (not attrs) (not query) (not av-pairs))
(setf values vals))
((and vals attrs (not subquery) (not av-pairs))
(t
(error 'clsql-sql-syntax-error
:reason "bad or ambiguous keyword combination.")))
- ins)))
+ insert)))
(defun delete-records (&key (from nil)
(where nil)
(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*))
+(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."
(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))))
+ (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))
(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))
"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)
+
+(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 &optional (database *default-database*))
+(defmethod output-sql (expr database)
(write-string (database-output-sql expr database) *sql-stream*)
- t)
+ (values))
-(defmethod output-sql ((expr list) &optional (database *default-database*))
+(defmethod output-sql ((expr list) database)
(if (null expr)
(write-string +null-string+ *sql-stream*)
(progn
(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)))))
+
+;;; Iteration
+
+
+(defmacro do-query (((&rest args) query-expression
+ &key (database '*default-database*) (result-types :auto))
+ &body body)
+ "Repeatedly executes BODY within a binding of ARGS on the
+attributes of each record resulting from QUERY-EXPRESSION. The
+return value is determined by the result of executing BODY. The
+default value of DATABASE is *DEFAULT-DATABASE*."
+ (let ((result-set (gensym "RESULT-SET-"))
+ (qe (gensym "QUERY-EXPRESSION-"))
+ (columns (gensym "COLUMNS-"))
+ (row (gensym "ROW-"))
+ (db (gensym "DB-")))
+ `(let ((,qe ,query-expression))
+ (typecase ,qe
+ (sql-object-query
+ (dolist (,row (query ,qe))
+ (destructuring-bind ,args
+ ,row
+ ,@body)))
+ (t
+ ;; Functional query
+ (let ((,db ,database))
+ (multiple-value-bind (,result-set ,columns)
+ (database-query-result-set ,qe ,db
+ :full-set nil
+ :result-types ,result-types)
+ (when ,result-set
+ (unwind-protect
+ (do ((,row (make-list ,columns)))
+ ((not (database-store-next-row ,result-set ,db ,row))
+ nil)
+ (destructuring-bind ,args ,row
+ ,@body))
+ (database-dump-result-set ,result-set ,db))))))))))
+
+(defun map-query (output-type-spec function query-expression
+ &key (database *default-database*)
+ (result-types :auto))
+ "Map the function over all tuples that are returned by the
+query in QUERY-EXPRESSION. The results of the function are
+collected as specified in OUTPUT-TYPE-SPEC and returned like in
+MAP."
+ (typecase query-expression
+ (sql-object-query
+ (map output-type-spec #'(lambda (x) (apply function x))
+ (query query-expression)))
+ (t
+ ;; Functional query
+ (macrolet ((type-specifier-atom (type)
+ `(if (atom ,type) ,type (car ,type))))
+ (case (type-specifier-atom output-type-spec)
+ ((nil)
+ (map-query-for-effect function query-expression database
+ result-types))
+ (list
+ (map-query-to-list function query-expression database result-types))
+ ((simple-vector simple-string vector string array simple-array
+ bit-vector simple-bit-vector base-string
+ simple-base-string)
+ (map-query-to-simple output-type-spec function query-expression
+ database result-types))
+ (t
+ (funcall #'map-query
+ (cmucl-compat:result-type-or-lose output-type-spec t)
+ function query-expression :database database
+ :result-types result-types)))))))
+
+(defun map-query-for-effect (function query-expression database result-types)
+ (multiple-value-bind (result-set columns)
+ (database-query-result-set query-expression database :full-set nil
+ :result-types result-types)
+ (when result-set
+ (unwind-protect
+ (do ((row (make-list columns)))
+ ((not (database-store-next-row result-set database row))
+ nil)
+ (apply function row))
+ (database-dump-result-set result-set database)))))
+
+(defun map-query-to-list (function query-expression database result-types)
+ (multiple-value-bind (result-set columns)
+ (database-query-result-set query-expression database :full-set nil
+ :result-types result-types)
+ (when result-set
+ (unwind-protect
+ (let ((result (list nil)))
+ (do ((row (make-list columns))
+ (current-cons result (cdr current-cons)))
+ ((not (database-store-next-row result-set database row))
+ (cdr result))
+ (rplacd current-cons (list (apply function row)))))
+ (database-dump-result-set result-set database)))))
+
+
+(defun map-query-to-simple (output-type-spec function query-expression database result-types)
+ (multiple-value-bind (result-set columns rows)
+ (database-query-result-set query-expression database :full-set t
+ :result-types result-types)
+ (when result-set
+ (unwind-protect
+ (if rows
+ ;; We know the row count in advance, so we allocate once
+ (do ((result
+ (cmucl-compat:make-sequence-of-type output-type-spec rows))
+ (row (make-list columns))
+ (index 0 (1+ index)))
+ ((not (database-store-next-row result-set database row))
+ result)
+ (declare (fixnum index))
+ (setf (aref result index)
+ (apply function row)))
+ ;; Database can't report row count in advance, so we have
+ ;; to grow and shrink our vector dynamically
+ (do ((result
+ (cmucl-compat:make-sequence-of-type output-type-spec 100))
+ (allocated-length 100)
+ (row (make-list columns))
+ (index 0 (1+ index)))
+ ((not (database-store-next-row result-set database row))
+ (cmucl-compat:shrink-vector result index))
+ (declare (fixnum allocated-length index))
+ (when (>= index allocated-length)
+ (setq allocated-length (* allocated-length 2)
+ result (adjust-array result allocated-length)))
+ (setf (aref result index)
+ (apply function row))))
+ (database-dump-result-set result-set database)))))
+
+;;; Row processing macro from CLSQL
+
+(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))))))
+
+(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) "")))
+
+(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))))))
+
+
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