;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
;;;; *************************************************************************
;;;;
-;;;; $Id$
-;;;;
;;;; Classes defining SQL expressions and methods for formatting the
;;;; appropriate SQL commands.
;;;;
(defvar *sql-stream* nil
"stream which accumulates SQL output")
-(defun sql-output (sql-expr &optional database)
+(defun sql-output (sql-expr &optional (database *default-database*))
"Top-level call for generating SQL strings. Returns an SQL
string appropriate for DATABASE which corresponds to the
supplied lisp expression SQL-EXPR."
(defmethod output-sql ((expr sql-ident) database)
(with-slots (name) expr
(write-string
- (convert-to-db-default-case
- (etypecase name
- (string name)
- (symbol (symbol-name name)))
- database)
+ (etypecase name
+ (string name)
+ (symbol (symbol-name name)))
*sql-stream*))
t)
(defmethod collect-table-refs ((sql sql-ident-attribute))
(let ((qual (slot-value sql 'qualifier)))
- (if (and qual (symbolp (slot-value sql 'qualifier)))
- (list (make-instance 'sql-ident-table :name
- (slot-value sql 'qualifier))))))
+ (when qual
+ (list (make-instance 'sql-ident-table :name qual)))))
(defmethod make-load-form ((sql sql-ident-attribute) &optional environment)
(declare (ignore environment))
(defmethod output-sql ((expr sql-ident-attribute) database)
(with-slots (qualifier name type) expr
(if (and (not qualifier) (not type))
- (etypecase name
- ;; Honor care of name
- (string
- (write-string name *sql-stream*))
- (symbol
- (write-string (sql-escape (convert-to-db-default-case
- (symbol-name name) database)) *sql-stream*)))
-
- ;;; KMR: The TYPE field is used by CommonSQL for type conversion -- it
+ (etypecase name
+ (string
+ (write-string name *sql-stream*))
+ (symbol
+ (write-string
+ (sql-escape (symbol-name name)) *sql-stream*)))
+
+ ;;; KMR: The TYPE field is used by CommonSQL for type conversion -- it
;;; should not be output in SQL statements
#+ignore
(format *sql-stream* "~@[~A.~]~A~@[ ~A~]"
- (when qualifier
- (convert-to-db-default-case (sql-escape qualifier) database))
- (sql-escape (convert-to-db-default-case name database))
- (when type
- (convert-to-db-default-case (symbol-name type) database)))
+ (when qualifier
+ (sql-escape qualifier))
+ (sql-escape name)
+ (when type
+ (symbol-name type)))
(format *sql-stream* "~@[~A.~]~A"
- (when qualifier
+ (when qualifier
(typecase qualifier
(string (format nil "~s" qualifier))
- (t (convert-to-db-default-case (sql-escape qualifier)
- database))))
- (sql-escape (convert-to-db-default-case name database))))
+ (t (sql-escape qualifier))))
+ (typecase name
+ (string (format nil "~s" (sql-escape name)))
+ (t (sql-escape name)))))
t))
(defmethod output-sql-hash-key ((expr sql-ident-attribute) database)
(defmethod output-sql ((expr sql-ident-table) database)
(with-slots (name alias) expr
- (let ((namestr (if (symbolp name)
- (symbol-name name)
- name)))
- (if (null alias)
- (write-string
- (sql-escape (convert-to-db-default-case namestr database))
- *sql-stream*)
- (progn
- (write-string
- (sql-escape (convert-to-db-default-case namestr database))
- *sql-stream*)
- (write-char #\Space *sql-stream*)
- (format *sql-stream* "~s" alias)))))
+ (etypecase name
+ (string
+ (format *sql-stream* "~s" (sql-escape name)))
+ (symbol
+ (write-string (sql-escape name) *sql-stream*)))
+ (when alias
+ (format *sql-stream* " ~s" alias)))
t)
(defmethod output-sql-hash-key ((expr sql-ident-table) database)
;; should do arity checking of subexpressions
(defmethod output-sql ((expr sql-relational-exp) database)
- (with-slots (operator sub-expressions)
- expr
- (let ((subs (if (consp (car sub-expressions))
- (car sub-expressions)
- sub-expressions)))
- (write-char #\( *sql-stream*)
- (do ((sub subs (cdr sub)))
- ((null (cdr sub)) (output-sql (car sub) database))
- (output-sql (car sub) database)
- (write-char #\Space *sql-stream*)
- (output-sql operator database)
- (write-char #\Space *sql-stream*))
- (write-char #\) *sql-stream*)))
+ (with-slots (operator sub-expressions) expr
+ ;; we do this as two runs so as not to emit confusing superflous parentheses
+ ;; The first loop renders all the child outputs so that we can skip anding with
+ ;; empty output (which causes sql errors)
+ ;; the next loop simply emits each sub-expression with the appropriate number of
+ ;; parens and operators
+ (flet ((trim (sub)
+ (string-trim +whitespace-chars+
+ (with-output-to-string (*sql-stream*)
+ (output-sql sub database)))))
+ (let ((str-subs (loop for sub in sub-expressions
+ for str-sub = (trim sub)
+ when (and str-sub (> (length str-sub) 0))
+ collect str-sub)))
+ (case (length str-subs)
+ (0 nil)
+ (1 (write-string (first str-subs) *sql-stream*))
+ (t
+ (write-char #\( *sql-stream*)
+ (write-string (first str-subs) *sql-stream*)
+ (loop for str-sub in (rest str-subs)
+ do
+ (write-char #\Space *sql-stream*)
+ (output-sql operator database)
+ (write-char #\Space *sql-stream*)
+ (write-string str-sub *sql-stream*))
+ (write-char #\) *sql-stream*))
+ ))))
t)
(defclass sql-upcase-like (sql-relational-exp)
(:documentation "An SQL between expression."))
(defmethod output-sql ((expr sql-between-exp) database)
- (with-slots (name args)
+ (with-slots (args)
expr
(output-sql (first args) database)
(write-string " BETWEEN " *sql-stream*)
(output-sql (car components) database)
(when components
(mapc #'(lambda (comp)
- (write-string ", " *sql-stream*)
- (output-sql comp database))
- (cdr components))))
+ (write-string ", " *sql-stream*)
+ (output-sql comp database))
+ (cdr components))))
t)
(defclass sql-set-exp (%sql-expression)
(find-class arg nil)))
target-args))))
(multiple-value-bind (selections arglist)
- (query-get-selections args)
+ (query-get-selections args)
(if (select-objects selections)
- (destructuring-bind (&key flatp refresh &allow-other-keys) arglist
- (make-instance 'sql-object-query :objects selections
- :flatp flatp :refresh refresh
- :exp arglist))
- (destructuring-bind (&key all flatp set-operation distinct from where
- group-by having order-by
- offset limit inner-join on &allow-other-keys)
- arglist
- (if (null selections)
- (error "No target columns supplied to select statement."))
- (if (null from)
- (error "No source tables supplied to select statement."))
- (make-instance 'sql-query :selections selections
- :all all :flatp flatp :set-operation set-operation
- :distinct distinct :from from :where where
- :limit limit :offset offset
- :group-by group-by :having having :order-by order-by
- :inner-join inner-join :on on))))))
+ (destructuring-bind (&key flatp refresh &allow-other-keys) arglist
+ (make-instance 'sql-object-query :objects selections
+ :flatp flatp :refresh refresh
+ :exp arglist))
+ (destructuring-bind (&key all flatp set-operation distinct from where
+ group-by having order-by
+ offset limit inner-join on &allow-other-keys)
+ arglist
+ (if (null selections)
+ (error "No target columns supplied to select statement."))
+ (if (null from)
+ (error "No source tables supplied to select statement."))
+ (make-instance 'sql-query :selections selections
+ :all all :flatp flatp :set-operation set-operation
+ :distinct distinct :from from :where where
+ :limit limit :offset offset
+ :group-by group-by :having having :order-by order-by
+ :inner-join inner-join :on on))))))
(defmethod output-sql ((query sql-query) database)
(with-slots (distinct selections from where group-by having order-by
(write-string "ON " *sql-stream*)
(output-sql distinct database)
(write-char #\Space *sql-stream*)))
- (output-sql (apply #'vector selections) database)
+ (let ((*in-subselect* t))
+ (output-sql (apply #'vector selections) database))
(when from
(write-string " FROM " *sql-stream*)
(flet ((ident-table-equal (a b)
(remove-duplicates from
:test #'ident-table-equal))
database))
- (string (write-string from *sql-stream*))
+ (string (format *sql-stream* "~s" (sql-escape from)))
(t (let ((*in-subselect* t))
(output-sql from database))))))
(when inner-join
(write-string "INSERT INTO " *sql-stream*)
(output-sql
(typecase into
- (string (sql-expression :attribute into))
+ (string (sql-expression :table into))
(t into))
database)
(when attributes
(write-char #\Space *sql-stream*)
(write-string
(if (stringp db-type) db-type ; override definition
- (database-get-type-specifier (car type) (cdr type) database
- (database-underlying-type database)))
+ (database-get-type-specifier (car type) (cdr type) database
+ (database-underlying-type database)))
*sql-stream*)
(let ((constraints (database-constraint-statement
(if (and db-type (symbolp db-type))
(with-slots (name columns modifiers transactions)
stmt
(write-string "CREATE TABLE " *sql-stream*)
- (output-sql name database)
+ (etypecase name
+ (string (format *sql-stream* "~s" (sql-escape name)))
+ (symbol (write-string (sql-escape name) *sql-stream*))
+ (sql-ident (output-sql name database)))
(write-string " (" *sql-stream*)
(do ((column columns (cdr column)))
((null (cdr column))
(write-string (car modifier) *sql-stream*)))
(write-char #\) *sql-stream*)
(when (and (eq :mysql (database-underlying-type database))
- transactions
- (db-type-transaction-capable? :mysql database))
- (write-string " Type=InnoDB" *sql-stream*))))
+ transactions
+ (db-type-transaction-capable? :mysql database))
+ (write-string " Type=InnoDB" *sql-stream*))))
t)
(defmethod database-output-sql ((str string) database)
(declare (optimize (speed 3) (safety 1)
- #+cmu (extensions:inhibit-warnings 3)))
+ #+cmu (extensions:inhibit-warnings 3)))
(let ((len (length str)))
(declare (type fixnum len))
(cond ((zerop len)
(concatenate 'string "'" str "'"))
(t
(let ((buf (make-string (+ (* len 2) 2) :initial-element #\')))
- (declare (simple-string buf))
- (do* ((i 0 (incf i))
+ (declare (simple-string buf))
+ (do* ((i 0 (incf i))
(j 1 (incf j)))
((= i len) (subseq buf 0 (1+ j)))
(declare (type fixnum i j))
(let ((char (aref str i)))
- (declare (character char))
+ (declare (character char))
(cond ((char= char #\')
(setf (aref buf j) #\')
(incf j)
(defmethod database-output-sql ((sym symbol) database)
(if (null sym)
+null-string+
- (convert-to-db-default-case
- (if (equal (symbol-package sym) keyword-package)
- (concatenate 'string "'" (string sym) "'")
- (symbol-name sym))
- database))))
+ (if (equal (symbol-package sym) keyword-package)
+ (concatenate 'string "'" (string sym) "'")
+ (symbol-name sym)))))
(defmethod database-output-sql ((tee (eql t)) database)
+ (if database
+ (let ((val (database-output-sql-as-type 'boolean t database (database-type database))))
+ (when val
+ (typecase val
+ (string (format nil "'~A'" val))
+ (integer (format nil "~A" val)))))
+ "'Y'"))
+
+#+nil(defmethod database-output-sql ((tee (eql t)) database)
(declare (ignore database))
"'Y'")
(defmethod database-output-sql ((arg vector) database)
(format nil "~{~A~^,~}" (map 'list #'(lambda (val)
- (sql-output val database))
- arg)))
+ (sql-output val database))
+ arg)))
(defmethod output-sql-hash-key ((arg vector) database)
(list 'vector (map 'list (lambda (arg)
(defmethod database-output-sql (thing database)
(if (or (null thing)
- (eq 'null thing))
+ (eq 'null thing))
+null-string+
(error 'sql-user-error
:message
- (format nil
- "No type conversion to SQL for ~A is defined for DB ~A."
- (type-of thing) (type-of database)))))
+ (format nil
+ "No type conversion to SQL for ~A is defined for DB ~A."
+ (type-of thing) (type-of database)))))
;;
(if (null output)
(error 'sql-user-error
:message (format nil "unsupported column constraint '~A'"
- constraint))
+ constraint))
(setq string (concatenate 'string string (cdr output))))
(if (< 1 (length constraint))
(setq string (concatenate 'string string " "))))))))
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