(in-package #:clsql-sys)
-(defun map-query (output-type-spec function query-expression
- &key (database *default-database*)
- (types nil))
- "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."
- ;; DANGER Will Robinson: Parts of the code for implementing
- ;; map-query (including the code below and the helper functions
- ;; called) are highly CMU CL specific.
- ;; KMR -- these have been replaced with cross-platform instructions above
- (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 types))
- (list
- (map-query-to-list function query-expression database 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 types))
- (t
- (funcall #'map-query (cmucl-compat:result-type-or-lose output-type-spec t)
- function query-expression :database database :types types)))))
-
-(defun map-query-for-effect (function query-expression database types)
- (multiple-value-bind (result-set columns)
- (database-query-result-set query-expression database :full-set nil
- :types 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 types)
- (multiple-value-bind (result-set columns)
- (database-query-result-set query-expression database :full-set nil
- :types 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 types)
- (multiple-value-bind (result-set columns rows)
- (database-query-result-set query-expression database :full-set t
- :types 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)))))
-
-(defmacro do-query (((&rest args) query-expression
- &key (database '*default-database*)
- (types nil))
- &body body)
- (let ((result-set (gensym))
- (columns (gensym))
- (row (gensym))
- (db (gensym)))
- `(let ((,db ,database))
- (multiple-value-bind (,result-set ,columns)
- (database-query-result-set ,query-expression ,db
- :full-set nil :types ,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)))))))
-
-
;;; Row processing macro
+(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
(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
projects / clsql.git / blobdiff