#:*default-odbc-external-format*
#:*null-value*
)
- (:documentation "This is the mid-level interface ODBC.")))
+ (:documentation "This is the mid-level interface ODBC."))
(in-package #:odbc-dbi)
(defun disconnect (conn)
(warn "Not implemented."))
-(defun query (expr &key db result-types row-count column-names)
- (warn "Not implemented."))
-
-(defun execute (expr conn)
+(defun sql (expr &key db result-types row-count column-names)
(warn "Not implemented."))
(defun close-query (result-set)
(defun fetch-row (result-set error-eof eof-value)
(warn "Not implemented."))
+
+
+(defclass odbc-query (query)
+ ((hstmt :initform nil :initarg :hstmt :accessor hstmt) ; = cursor??
+ (column-count :initform nil :accessor column-count)
+ (column-names :initform (make-array 0 :element-type 'string :adjustable t :fill-pointer t)
+ :accessor column-names)
+ (column-c-types :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
+ :accessor column-c-types)
+ (column-sql-types :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
+ :accessor column-sql-types)
+ (column-data-ptrs :initform (make-array 0 :adjustable t :fill-pointer t)
+ :accessor data-ptrs)
+ (column-out-len-ptrs :initform (make-array 0 :adjustable t :fill-pointer t)
+ :accessor column-out-len-ptrs)
+ (column-precisions :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
+ :accessor column-precisions)
+ (column-scales :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
+ :accessor column-scales)
+ (column-nullables-p :initform (make-array 0 :element-type 'fixnum :adjustable t :fill-pointer t)
+ :accessor column-nullables-p)
+ ;;(parameter-count :initform 0 :accessor parameter-count)
+ (parameter-data-ptrs :initform (make-array 0 :adjustable t :fill-pointer t)
+ :accessor parameter-ptrs)))
+
+(defclass odbc-database (database)
+ (;; any reason to have more than one henv?
+ (henv :initform nil :allocation :class :initarg :henv :accessor henv)
+ (hdbc :initform nil :initarg :hdbc :accessor hdbc)
+ ;; info returned from SQLGetInfo
+ (info :initform (make-hash-table) :reader db-info))
+ #+cormanlisp (:metaclass cl::class-slot-class))
+
+;; use this method if the db object does not exist yet
+
+;; cstacy
+(defparameter *odbc-driver-connect-p* nil)
+
+;; cstacy
+(defmethod db-connect ((db-type (eql :odbc)) db-name user-id password autocommit)
+ (if *odbc-driver-connect-p*
+ (driver-connect db-type :db-name db-name :user-id user-id :password password)
+ ;; Else just use SQLConnect (old way).
+ (let ((db (make-instance 'odbc-database :db-type :odbc
+ :db-name db-name
+ :user-id user-id
+ :password password)))
+ (unless (henv db) ;; has class allocation!
+ (setf (henv db) (%new-environment-handle)))
+ (setf (hdbc db) (%new-db-connection-handle (henv db)))
+ ;; if connection cannot be established, we drop out here.
+ (db-connect db db-name user-id password autocommit))))
+
+;; cstacy
+(defmethod db-connect ((db odbc-database) db-name user-id password autocommit)
+ (if *odbc-driver-connect-p*
+ (driver-connect db :db-name db-name :user-id user-id :password password)
+ ;; Else just use SQLConnect (old way).
+ (%sql-connect (hdbc db) db-name user-id password))
+ ;; If we got this far without erring out, the database was successfully connected.
+ (setf (odbc::db-connected-p db) t)
+ (let ((server-name (get-odbc-info db odbc::$SQL_SERVER_NAME))
+ (dbms-name (get-odbc-info db odbc::$SQL_DBMS_NAME))
+ (txn-capable-p (/= (get-odbc-info db odbc::$SQL_TXN_CAPABLE) odbc::$SQL_TC_NONE)))
+ ;; need SERVER-NAME and DBMS-NAME because many drivers mix this up
+ (flet ((db-type-p (db-name)
+ (or (search db-name server-name :test #'char-equal)
+ (search db-name dbms-name :test #'char-equal))))
+ (cond ((db-type-p "oracle") (change-class db 'oracle-database))
+ ((db-type-p "access") (change-class db 'access-database))
+ ((db-type-p "mysql") (change-class db 'mysql-database))
+ (t nil)))
+ (when txn-capable-p ; has transaction support
+ (if autocommit
+ (enable-autocommit (hdbc db))
+ (disable-autocommit (hdbc db)))))
+ db)
+
+;; cstacy
+(defgeneric driver-connect (db-type &key hwnd connection-string
+ completion-mode
+ db-name user-id password
+ &allow-other-keys))
+
+;; cstacy
+(defmethod driver-connect ((db-type (eql :odbc)) &key hwnd connection-string
+ (completion-mode :complete)
+ db-name user-id password)
+ (multiple-value-bind (connection-string db-name user-id password)
+ (odbc-connection-string connection-string db-name user-id password)
+ (let ((db (make-instance 'odbc-database
+ :db-type :odbc
+ :db-name db-name
+ :user-id user-id
+ :password password)))
+ (unless (henv db) ;; has class allocation!
+ (setf (henv db) (%new-environment-handle))) ;SQLAllocEnv
+ (setf (hdbc db) (%new-db-connection-handle (henv db))) ;SQLAllocConnect
+ (cond ((null hwnd)
+ (setq hwnd (%null-ptr)))
+ #+(and :lispworks (not :unix))
+ ((eq hwnd t)
+ (setq hwnd (capi-library::representation-handle
+ (capi:representation
+ (ww::find-topmost-window nil nil)))))
+ #+(and :lispworks (not :unix))
+ ((eq hwnd :podium)
+ (setq hwnd (capi-win32-lib::r-top-level-interface-hwnd win32::*main-representation*)))
+ ((not (integerp hwnd))
+ (error "HWND is not NIL, T, :PODIUM, or an integer")))
+ ;; if connection cannot be established, we drop out here.
+ (driver-connect db
+ :hwnd hwnd
+ :connection-string connection-string
+ :completion-mode completion-mode))))
+
+;; cstacy
+(defmethod driver-connect ((db odbc-database) &key hwnd connection-string completion-mode
+ &allow-other-keys)
+ (let ((completion (%sql-driver-connect
+ (henv db) (hdbc db) hwnd connection-string completion-mode)))
+ (multiple-value-bind (dsn uid pwd)
+ (odbc-parse-connection-string completion)
+ (flet ((non-string-null (x) (and x (not (string= x "")) x)))
+ (setf (odbc::db-name db) (or (non-string-null (odbc::db-name db)) dsn))
+ (setf (odbc::db-user-id db) (or (non-string-null (odbc::db-user-id db)) uid))
+ (setf (odbc::db-password db) (or (non-string-null (odbc::db-password db)) pwd)))))
+ db)
+
+(defmethod db-disconnect ((database odbc-database))
+ (with-slots (hdbc queries odbc::connected-p) database
+ (when odbc::connected-p
+ (dolist (query queries)
+ (if (query-active-p query)
+ (with-slots (hstmt) query
+ (when hstmt
+ (%free-statement hstmt :drop)
+ (setf hstmt nil)))))
+ (%disconnect hdbc)
+ #+kmr-nil
+ (let ((reset-default-db-p (eq *default-database* database)))
+ (setf *connected-databases* (delete database *connected-databases*)
+ odbc::connected-p nil)
+ (when reset-default-db-p
+ (setf *default-database* (car *connected-databases*)))))))
+
+(defmethod db-commit ((database odbc-database))
+ (%commit (henv database) (hdbc database)))
+
+(defmethod db-rollback ((database odbc-database))
+ (%rollback (henv database) (hdbc database)))
+
+(defmethod db-cancel-query ((query odbc-query))
+ (with-slots (hstmt) query
+ (%sql-cancel hstmt)
+ (setf (query-active-p query) nil)))
+
+#+simple-version
+(defmacro with-transaction (&body body)
+ `(%with-transaction
+ (:henv (henv ,*default-database*) :hdbc (hdbc ,*default-database*))
+ ,@body))
+
+(defmethod initialize-instance :after ((query odbc-query)
+ &key sql henv hdbc &allow-other-keys)
+ (when sql
+ (let ((hstmt (%new-statement-handle hdbc)))
+ (%sql-exec-direct sql hstmt henv hdbc)
+ (with-slots (column-count
+ column-names column-c-types column-sql-types column-data-ptrs
+ column-out-len-ptrs column-precisions column-scales
+ column-nullables-p active-p) query
+ (setf (hstmt query) hstmt)
+ (%initialize-query query)
+ (setf active-p t)))))
+
+;; one for odbc-database is missing
+(defmethod terminate ((query odbc-query))
+ ;;(format tb::*local-output* "~%*** terminated: ~s" query)
+ (with-slots (hstmt) query
+ (when hstmt
+ ;(%free-statement hstmt :drop)
+ (uffi:free-foreign-object hstmt)) ;; ??
+ (%dispose-column-ptrs query)))
+
+(defmethod %dispose-column-ptrs ((query odbc-query))
+ (with-slots (column-data-ptrs column-out-len-ptrs hstmt) query
+ (loop for data-ptr across column-data-ptrs
+ when data-ptr do (uffi:free-foreign-object data-ptr))
+ (loop for out-len-ptr across column-out-len-ptrs
+ when out-len-ptr do (uffi:free-foreign-object out-len-ptr))))
+
+(defmethod db-open-query ((database odbc-database) query-expression
+ &key arglen col-positions
+ &allow-other-keys)
+ (db-open-query (get-free-query database) query-expression
+ :arglen arglen :col-positions col-positions))
+
+(defmethod db-open-query ((query odbc-query) query-expression
+ &key arglen col-positions &allow-other-keys)
+ (%db-execute query query-expression)
+ (%initialize-query query arglen col-positions))
+
+(defmethod db-fetch-query-results ((database odbc-database) &optional count flatp)
+ (db-fetch-query-results (odbc::db-query-object database) count flatp))
+
+(defmethod db-fetch-query-results ((query odbc-query) &optional count flatp)
+ (when (query-active-p query)
+ (let (#+ignore(no-data nil))
+ (with-slots (column-count column-data-ptrs column-c-types column-sql-types
+ column-out-len-ptrs column-precisions hstmt)
+ query
+ (values
+ (cond (flatp
+ (when (> column-count 1)
+ (error "If more than one column is to be fetched, flatp has to be nil."))
+ (let ((data-ptr (aref column-data-ptrs 0))
+ (c-type (aref column-c-types 0))
+ (sql-type (aref column-sql-types 0))
+ (out-len-ptr (aref column-out-len-ptrs 0))
+ (precision (aref column-precisions 0)))
+ (loop for i from 0
+ until (or (and count (= i count))
+ ;;(setf no-data ;; not used???
+ (= (%sql-fetch hstmt) odbc::$SQL_NO_DATA_FOUND))
+ collect
+ (cond ((< 0 precision +max-precision+)
+ (read-data data-ptr c-type sql-type out-len-ptr nil))
+ ((zerop (get-cast-long out-len-ptr))
+ nil)
+ (t
+ (read-data-in-chunks hstmt 0 data-ptr c-type sql-type
+ out-len-ptr nil)))
+ #+ignore
+ (if (< 0 precision +max-precision+) ;(and precision (< precision +max-precision+))
+ (read-data data-ptr c-type sql-type out-len-ptr nil)
+ (read-data-in-chunks hstmt 0 data-ptr c-type sql-type
+ out-len-ptr nil)))))
+ (t
+ (loop for i from 0
+ until (or (and count (= i count))
+ (= (%sql-fetch hstmt) odbc::$SQL_NO_DATA_FOUND))
+ collect
+ (loop for data-ptr across column-data-ptrs
+ for c-type across column-c-types
+ for sql-type across column-sql-types
+ for out-len-ptr across column-out-len-ptrs
+ for precision across column-precisions
+ for j from 0 ; column count is zero based in lisp
+ collect
+ (cond ((< 0 precision +max-precision+)
+ (read-data data-ptr c-type sql-type out-len-ptr nil))
+ ((zerop (get-cast-long out-len-ptr))
+ nil)
+ (t
+ (read-data-in-chunks hstmt j data-ptr c-type sql-type
+ out-len-ptr nil)))))))
+ query)))))
+
+#+lispworks
+(defmacro without-interrupts (&body body)
+ `(mp:without-preemption ,@body))
+
+#+allegro
+(defmacro without-interrupts (&body body)
+ `(mp:without-scheduling ,@body))
+
+#+cormanlisp
+(defmacro without-interrupts (&body body)
+ `(progn ,@body))
+
+#+pcl
+(defmacro without-interrupts (&body body)
+ `(pcl::without-interrupts ,@body))
+
+(defmethod db-query ((database odbc-database) query-expression &optional flatp)
+ (let ((free-query
+ ;; make it thread safe
+ (get-free-query database)))
+ ;;(format tb::*local-output* "~%new query: ~s" free-query)
+ (setf (sql-expression free-query) query-expression)
+ (unwind-protect
+ (progn
+ (%db-execute free-query query-expression)
+ (%initialize-query free-query)
+ (values
+ (db-fetch-query-results free-query nil flatp)
+ ;; LMH return the column names as well
+ (column-names free-query)))
+ (db-close-query free-query)
+ ;;(format tb::*local-output* "~%query closed: ~s" free-query)
+ )))
+
+(defmethod %db-execute ((database odbc-database) sql-expression &key &allow-other-keys)
+ (%db-execute (get-free-query database) sql-expression))
+
+;; C. Stacy's idea
+(defmethod %db-execute ((query odbc-query) sql-expression &key &allow-other-keys)
+ ;; cstacy
+ (when *trace-sql*
+ (format (if (streamp *trace-sql*) *trace-sql* *trace-output*)
+ "~&~A;~%" sql-expression))
+ (with-slots (henv hdbc) (odbc::query-database query)
+ (with-slots (hstmt) query
+ (unless hstmt (setf hstmt (%new-statement-handle hdbc)))
+ ;;(print (list :new hstmt) tb::*local-output*)
+ (setf (sql-expression query) sql-expression)
+ (%sql-exec-direct sql-expression hstmt henv hdbc)
+ query)))
+
+;; reuse inactive queries
+(defmethod get-free-query ((database odbc-database))
+ "get-free-query finds or makes a nonactive query object, and then sets it to active.
+This makes the functions db-execute-command and db-query thread safe."
+ (with-slots (queries) database
+ (or (without-interrupts ;; not context switch allowed here
+ (let ((inactive-query (find-if (lambda (query)
+ (not (query-active-p query)))
+ queries)))
+ (when inactive-query
+ (with-slots (column-count column-names column-c-types
+ column-sql-types column-data-ptrs
+ column-out-len-ptrs column-precisions
+ column-scales column-nullables-p)
+ inactive-query
+ ;;(print column-data-ptrs tb::*local-output*)
+ ;;(%dispose-column-ptrs inactive-query)
+ (setf column-count 0
+ (fill-pointer column-names) 0
+ (fill-pointer column-c-types) 0
+ (fill-pointer column-sql-types) 0
+ (fill-pointer column-data-ptrs) 0
+ (fill-pointer column-out-len-ptrs) 0
+ (fill-pointer column-precisions) 0
+ (fill-pointer column-scales) 0
+ (fill-pointer column-nullables-p) 0))
+ (setf (query-active-p inactive-query) t))
+ inactive-query))
+ (let ((new-query (make-instance 'odbc-query
+ :database database
+ ;;(clone-database database)
+ :active-p t)))
+ (push new-query queries)
+ new-query))))
+
+(defmethod db-execute-command ((database odbc-database) sql-string)
+ (db-execute-command (get-free-query database) sql-string))
+
+(defmethod db-execute-command ((query odbc-query) sql-string)
+ ;; cstacy
+ (when *trace-sql*
+ (format (if (streamp *trace-sql*) *trace-sql* *trace-output*)
+ "~&~A;~%" sql-string))
+ (with-slots (hstmt database) query
+ (with-slots (henv hdbc) database
+ (unless hstmt (setf hstmt (%new-statement-handle hdbc)))
+ (unwind-protect
+ (%sql-exec-direct sql-string hstmt henv hdbc)
+ (db-close-query query)))))
+
+(defmethod %initialize-query ((database odbc-database) &optional arglen col-positions)
+ (%initialize-query (db-query-object database) arglen col-positions))
+
+(defmethod %initialize-query ((query odbc-query) &optional arglen col-positions)
+ (with-slots (hstmt
+ column-count column-names column-c-types column-sql-types
+ column-data-ptrs column-out-len-ptrs column-precisions
+ column-scales column-nullables-p)
+ query
+ (setf column-count (if arglen
+ (min arglen (result-columns-count hstmt))
+ (result-columns-count hstmt)))
+ ;;(format tb::*local-output* "~%column-count: ~d, col-positions: ~d" column-count col-positions)
+ (labels ((initialize-column (col-nr)
+ (multiple-value-bind (name sql-type precision scale nullable-p)
+ (%describe-column hstmt (1+ col-nr))
+ ;; allocate space to bind result rows to
+ (multiple-value-bind (c-type data-ptr out-len-ptr size long-p)
+ (%allocate-bindings sql-type precision)
+ (unless long-p ;; if long-p we fetch in chunks with %sql-get-data
+ (%bind-column hstmt col-nr c-type data-ptr (1+ size) out-len-ptr))
+ (vector-push-extend name column-names)
+ (vector-push-extend sql-type column-sql-types)
+ (vector-push-extend (sql-to-c-type sql-type) column-c-types)
+ (vector-push-extend precision column-precisions)
+ (vector-push-extend scale column-scales)
+ (vector-push-extend nullable-p column-nullables-p)
+ (vector-push-extend data-ptr column-data-ptrs)
+ (vector-push-extend out-len-ptr column-out-len-ptrs)))))
+ (if col-positions
+ (dolist (col-nr col-positions)
+ (initialize-column col-nr))
+ (dotimes (col-nr column-count)
+ ;; get column information
+ (initialize-column col-nr)))))
+ query)
+
+(defmethod db-close-query ((query odbc-query) &key drop-p)
+ (with-slots (hstmt column-count column-names column-c-types column-sql-types
+ column-data-ptrs column-out-len-ptrs column-precisions
+ column-scales column-nullables-p) query
+ (let ((count (fill-pointer column-data-ptrs)))
+ (when (not (zerop count))
+ (dotimes (col-nr count)
+ (let ((data-ptr (aref column-data-ptrs col-nr))
+ (out-len-ptr (aref column-out-len-ptrs col-nr)))
+ (when data-ptr (uffi:free-foreign-object data-ptr)) ; we *did* allocate them
+ (when out-len-ptr (uffi:free-foreign-object out-len-ptr)))))
+ (cond ((null hstmt)
+ nil)
+ (drop-p
+ (%free-statement hstmt :drop)
+ (setf hstmt nil))
+ (t
+ (%free-statement hstmt :unbind)
+ (%free-statement hstmt :reset)
+ (%free-statement hstmt :close)))
+ (setf (query-active-p query) nil)))
+ query)
+
+(defmethod %read-query-data ((database odbc-database) ignore-columns)
+ (%read-query-data (db-query-object database) ignore-columns))
+
+(defmethod %read-query-data ((query odbc-query) ignore-columns)
+ (with-slots (hstmt column-count column-c-types column-sql-types
+ column-data-ptrs column-out-len-ptrs column-precisions)
+ query
+ (unless (= (SQLFetch hstmt) odbc::$SQL_NO_DATA_FOUND)
+ (values
+ (loop for col-nr from 0 to (- column-count
+ (if (eq ignore-columns :last) 2 1))
+ collect
+ (let ((precision (aref column-precisions col-nr))
+ (sql-type (aref column-sql-types col-nr)))
+ (cond ((or (< 0 precision +max-precision+)
+ (and (zerop precision) (not (find sql-type '($SQL_C_CHAR)))))
+ (read-data (aref column-data-ptrs col-nr)
+ (aref column-c-types col-nr)
+ sql-type
+ (aref column-out-len-ptrs col-nr)
+ nil))
+ ((zerop (get-cast-long (aref column-out-len-ptrs col-nr)))
+ *null*)
+ (t
+ (read-data-in-chunks hstmt col-nr
+ (aref column-data-ptrs col-nr)
+ (aref column-c-types col-nr)
+ (aref column-sql-types col-nr)
+ (aref column-out-len-ptrs col-nr)
+ nil)))))
+ t))))
+
+(defmethod db-map-query ((database odbc-database) type function query-exp)
+ (db-map-query (get-free-query database) type function query-exp))
+
+(defmethod db-map-query ((query odbc-query) type function query-exp)
+ (declare (ignore type)) ; preliminary. Do a type coersion here
+ (%db-execute query (odbc::sql-string query-exp))
+ (unwind-protect
+ (progn
+ (%initialize-query query)
+ ;; the main loop
+ (loop for data = (%read-query-data query nil)
+ while data
+ do (apply function data)))
+ ;; dispose of memory and set query inactive or get rid of it
+ (db-close-query query)))
+
+(defmethod db-map-bind-query ((query odbc-query) type function
+ &rest parameters)
+ (declare (ignore type)) ; preliminary. Do a type coersion here
+ (unwind-protect
+ (progn
+ (apply #'%db-bind-execute query parameters)
+ ;; the main loop
+ (loop with data
+ while (setf data (%read-query-data query nil))
+ do (apply function data)))
+ ;; dispose of memory and set query inactive or get rid of it
+ (%db-reset-query query)))
+
+;; does not always return exactly a lisp type...
+(defun sql-to-lisp-type (sql-type)
+ (ecase sql-type
+ ((#.odbc::$SQL_CHAR #.odbc::$SQL_VARCHAR #.odbc::$SQL_LONGVARCHAR) :string)
+ ((#.odbc::$SQL_NUMERIC #.odbc::$SQL_DECIMAL #.odbc::$SQL_BIGINT) :string) ; ??
+ (#.odbc::$SQL_INTEGER :long)
+ (#.odbc::$SQL_SMALLINT :short)
+ ((#.odbc::$SQL_FLOAT #.odbc::$SQL_DOUBLE) :long)
+ (#.odbc::$SQL_REAL :long)
+ (#.odbc::$SQL_DATE 'sql-c-date)
+ (#.odbc::$SQL_TIME 'sql-c-time)
+ (#.odbc::$SQL_TIMESTAMP 'sql-c-timestamp)
+ ;;((#.odbc::$SQL_BINARY #.odbc::$SQL_VARBINARY #.odbc::$SQL_LONGVARBINARY) odbc::$SQL_C_BINARY) ; ??
+ (#.odbc::$SQL_TINYINT :short)
+ ;;(#.odbc::$SQL_BIT odbc::$SQL_C_BIT) ; ??
+ ((#.odbc::$SQL_VARBINARY #.odbc::$SQL_LONGVARBINARY) :binary)
+ ))
+
+;; prepared queries
+
+(defmethod db-prepare-statement ((database odbc-database) sql
+ &key parameter-table parameter-columns)
+ (with-slots (hdbc) database
+ (let ((query (get-free-query database)))
+ (with-slots (hstmt) query
+ (unless hstmt (setf hstmt (%new-statement-handle hdbc))))
+ (db-prepare-statement query sql parameter-table parameter-columns))))
+
+(defmethod db-prepare-statement ((query odbc-query) (sql string)
+ &key parameter-table parameter-columns)
+ ;; this is a workaround to get hold of the column types when the driver does not
+ ;; support SQLDescribeParam. To do: put code in here for drivers that do
+ ;; support it.
+ (unless (string-equal sql "insert" :end1 6)
+ (error "Only insert expressions are supported in literal ODBC: '~a'." sql))
+ (%db-execute query (format nil "select ~{~a~^,~} from ~a where 0 = 1"
+ (or parameter-columns '("*")) parameter-table))
+ (%initialize-query query)
+ (with-slots (hstmt) query
+ (%free-statement hstmt :unbind)
+ (%free-statement hstmt :reset)
+ (setf (sql-expression query) sql)
+ (%sql-prepare hstmt sql))
+ query)
+
+
+(defmethod %db-bind-execute ((query odbc-query) &rest parameters)
+ (with-slots (hstmt parameter-data-ptrs) query
+ (loop for parameter in parameters
+ with data-ptr and size and parameter-string
+ do
+ (setf parameter-string
+ (if (stringp parameter)
+ parameter
+ (write-to-string parameter))
+ size (length parameter-string)
+ data-ptr
+ (uffi:allocate-foreign-string (1+ size)))
+ (vector-push-extend data-ptr parameter-data-ptrs)
+ (%sql-bind-parameter
+ hstmt (1- (fill-pointer parameter-data-ptrs)) odbc::$SQL_PARAM_INPUT
+ odbc::$SQL_C_CHAR ; (aref column-c-types parameter-count)
+ odbc::$SQL_CHAR ; sql-type
+ +max-precision+ ;precision ; this should be the actual precision!
+ ;; scale
+ 0 ;; should be calculated for odbc::$SQL_DECIMAL,
+ ;;$SQL_NUMERIC and odbc::$SQL_TIMESTAMP
+ data-ptr ;; = rgbValue
+ 0
+ ;; *pcbValue;
+ ;; change this for output and binary input! (see 3-32)
+ (%null-ptr))
+ (%put-str data-ptr parameter-string size))
+ (%sql-execute hstmt)))
+
+
+(defmethod %db-reset-query ((query odbc-query))
+ (with-slots (hstmt parameter-data-ptrs) query
+ (prog1
+ (db-fetch-query-results query nil ; flatp
+ nil)
+ (%free-statement hstmt :reset) ;; but _not_ :unbind !
+ (%free-statement hstmt :close)
+ (dotimes (param-nr (fill-pointer parameter-data-ptrs))
+ (let ((data-ptr (aref parameter-data-ptrs param-nr)))
+ (when data-ptr (uffi:free-foreign-object data-ptr))))
+ (setf (fill-pointer parameter-data-ptrs) 0))))
+
+(defun data-parameter-ptr (hstmt)
+ (uffi:with-foreign-object (param-ptr (* :pointer-void))
+ (let ((return-code (%sql-param-data hstmt param-ptr)))
+ ;;(format t "~%return-code from %sql-param-data: ~a~%" return-code)
+ (when (= return-code odbc::$SQL_NEED_DATA)
+ ;;(ffc::%pointer-to-address (%get-ptr param-ptr))
+ (uffi:deref-pointer param-ptr :pointer-void)))))
+
+;; database inquiery functions
+
+(defmethod db-describe-columns ((database odbc-database)
+ table-qualifier table-owner table-name column-name)
+ (with-slots (hdbc) database
+ (%describe-columns hdbc table-qualifier table-owner table-name column-name)))
+
+;; should translate info-type integers to keywords in order to make this
+;; more readable?
+(defmethod get-odbc-info ((database odbc-database) info-type)
+ (with-slots (hdbc info) database
+ (or (gethash info-type info)
+ (setf (gethash info-type info)
+ (%sql-get-info hdbc info-type)))))
+
+(defmethod get-odbc-info ((query odbc-query) info-type)
+ (get-odbc-info (odbc::query-database query) info-type))
+
+;; driver inquiery
+(defmethod db-data-sources ((db-type (eql :odbc)))
+ "Returns a list of (data-source description) - pairs"
+ (let ((henv (%new-environment-handle)))
+ (unwind-protect
+ (loop with direction = :first
+ for data-source+description
+ = (multiple-value-list (%sql-data-sources henv :direction direction))
+ while (car data-source+description)
+ collect data-source+description
+ do (setf direction :next))
+ (%sql-free-environment henv))))
+
+; EOF
projects / clsql.git / blobdiff