;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
;;;; *************************************************************************
;;;;
-;;;; $Id$
-;;;;
;;;; Generic ODBC layer, used by db-odbc and db-aodbc backends
;;;;
;;;; This file is part of CLSQL.
(defmethod initialize-instance :after ((db generic-odbc-database)
&rest all-keys)
+ (declare (ignore all-keys))
(unless (slot-boundp db 'dbi-package)
(error "dbi-package not specified."))
(let ((pkg (slot-value db 'dbi-package)))
(unless pkg
(error "dbi-package is nil."))
(setf (slot-value db 'disconnect-fn)
- (intern (symbol-name '#:disconnect) pkg)
- (slot-value db 'sql-fn)
- (intern (symbol-name '#:sql) pkg)
- (slot-value db 'close-query-fn)
- (intern (symbol-name '#:close-query) pkg)
- (slot-value db 'fetch-row)
- (intern (symbol-name '#:fetch-row) pkg)
- (slot-value db 'list-all-database-tables-fn)
- (intern (symbol-name '#:list-all-database-tables) pkg)
- (slot-value db 'list-all-table-columns-fn)
- (intern (symbol-name '#:list-all-table-columns) pkg))))
+ (intern (symbol-name '#:disconnect) pkg)
+ (slot-value db 'sql-fn)
+ (intern (symbol-name '#:sql) pkg)
+ (slot-value db 'close-query-fn)
+ (intern (symbol-name '#:close-query) pkg)
+ (slot-value db 'fetch-row)
+ (intern (symbol-name '#:fetch-row) pkg)
+ (slot-value db 'list-all-database-tables-fn)
+ (intern (symbol-name '#:list-all-database-tables) pkg)
+ (slot-value db 'list-all-table-columns-fn)
+ (intern (symbol-name '#:list-all-table-columns) pkg))))
;;; Object methods
(defmethod read-sql-value (val (type (eql 'boolean))
- (database generic-odbc-database)
- (db-type (eql :postgresql)))
+ (database generic-odbc-database)
+ (db-type (eql :postgresql)))
+ (if (string= "0" val) nil t))
+
+(defmethod read-sql-value (val (type (eql 'generalized-boolean))
+ (database generic-odbc-database)
+ (db-type (eql :postgresql)))
(if (string= "0" val) nil t))
-
+(defmethod read-sql-value (val (type (eql 'boolean)) database
+ (db-type (eql :mssql)))
+ (declare (ignore database))
+ (etypecase val
+ (string (if (string= "0" val) nil t))
+ (integer (if (zerop val) nil t))))
+
+(defmethod read-sql-value (val (type (eql 'generalized-boolean)) database
+ (db-type (eql :mssql)))
+ (declare (ignore database))
+ (etypecase val
+ (string (if (string= "0" val) nil t))
+ (integer (if (zerop val) nil t))))
+
+;;; Type methods
+
+(defmethod database-get-type-specifier ((type symbol) args database
+ (db-type (eql :mssql)))
+ "Special database types for MSSQL backends"
+ (declare (ignore database db-type args))
+ (case type
+ (wall-time "DATETIME")
+ (date "SMALLDATETIME")
+ ((generalized-boolean boolean) "BIT")
+ ((longchar text) "ntext")
+ ((varchar string)
+ (if args
+ (format nil "NVARCHAR(~A)" (car args))
+ (format nil "NVARCHAR(~D)" *default-string-length*)))
+ (t (call-next-method))))
+
+;;; Generation of SQL strings from lisp expressions
+
+(defmethod database-output-sql ((tee (eql t)) (database generic-odbc-database))
+ (case (database-underlying-type database)
+ (:mssql "1")
+ (t "'Y'")))
+
+;;; Database backend capabilities
+
+(defmethod db-type-use-fully-qualified-column-on-drop-index? ((db-type (eql :mssql)))
+ t)
+
+(defmethod db-type-has-boolean-where? ((db-type (eql :mssql)))
+ nil)
+
+(defmethod db-type-has-intersect? ((db-type (eql :mssql)))
+ nil)
+
+(defmethod db-type-has-except? ((db-type (eql :mssql)))
+ nil)
+
;;; Backend methods
(defmethod database-disconnect ((database generic-odbc-database))
(setf (odbc-conn database) nil)
t)
-(defmethod database-query (query-expression (database generic-odbc-database)
- result-types field-names)
+(defmethod database-query (query-expression (database generic-odbc-database)
+ result-types field-names)
(handler-case
(funcall (sql-fn database)
- query-expression :db (odbc-conn database)
- :result-types result-types
- :column-names field-names)
+ query-expression :db (odbc-conn database)
+ :result-types result-types
+ :column-names field-names)
#+ignore
(error ()
(error 'sql-database-data-error
- :database database
- :expression query-expression
- :message "Query failed"))))
+ :database database
+ :expression query-expression
+ :message "Query failed"))))
(defmethod database-execute-command (sql-expression (database generic-odbc-database))
(handler-case
(funcall (sql-fn database)
- sql-expression :db (odbc-conn database))
+ sql-expression :db (odbc-conn database))
#+ignore
(sql-error (e)
(error e))
#+ignore
(error ()
(error 'sql-database-data-error
- :database database
- :expression sql-expression
- :message "Execute command failed"))))
+ :database database
+ :expression sql-expression
+ :message "Execute command failed"))))
(defstruct odbc-result-set
(defmethod database-query-result-set ((query-expression string)
- (database generic-odbc-database)
- &key full-set result-types)
- (handler-case
+ (database generic-odbc-database)
+ &key full-set result-types)
+ (handler-case
(multiple-value-bind (query column-names)
- (funcall (sql-fn database)
- query-expression
- :db (odbc-conn database)
- :row-count nil
- :column-names t
- :query t
- :result-types result-types)
- (values
- (make-odbc-result-set :query query :full-set full-set
- :types result-types)
- (length column-names)
- nil ;; not able to return number of rows with odbc
- ))
+ (funcall (sql-fn database)
+ query-expression
+ :db (odbc-conn database)
+ :row-count nil
+ :column-names t
+ :query t
+ :result-types result-types)
+ (values
+ (make-odbc-result-set :query query :full-set full-set
+ :types result-types)
+ (length column-names)
+ nil ;; not able to return number of rows with odbc
+ ))
(error ()
(error 'sql-database-data-error
- :database database
- :expression query-expression
- :message "Query result set failed"))))
+ :database database
+ :expression query-expression
+ :message "Query result set failed"))))
(defmethod database-dump-result-set (result-set (database generic-odbc-database))
(funcall (close-query-fn database) (odbc-result-set-query result-set))
t)
(defmethod database-store-next-row (result-set
- (database generic-odbc-database)
- list)
+ (database generic-odbc-database)
+ list)
(let ((row (funcall (fetch-row-fn database)
- (odbc-result-set-query result-set) nil 'eof)))
+ (odbc-result-set-query result-set) nil 'eof)))
(if (eq row 'eof)
- nil
+ nil
(progn
- (loop for elem in row
- for rest on list
- do
- (setf (car rest) elem))
- list))))
+ (loop for elem in row
+ for rest on list
+ do
+ (setf (car rest) elem))
+ list))))
-(defmethod database-list-tables ((database generic-odbc-database)
- &key (owner nil))
- (declare (ignore owner))
+
+(defun %database-list-* (database type owner)
+ "Internal function used by database-list-tables and
+database-list-views"
(multiple-value-bind (rows col-names)
(funcall (list-all-database-tables-fn database) :db (odbc-conn database))
(declare (ignore col-names))
+ ;; http://msdn.microsoft.com/en-us/library/ms711831%28VS.85%29.aspx
;; TABLE_SCHEM is hard-coded in second column by ODBC Driver Manager
;; TABLE_NAME in third column, TABLE_TYPE in fourth column
- (loop for row in rows
- when (and (not (string-equal "information_schema" (nth 1 row)))
- (string-equal "TABLE" (nth 3 row)))
- collect (nth 2 row))))
+ (loop for (category schema name ttype . rest) in rows
+ when (and (string-equal type ttype)
+ (or (null owner) (string-equal owner schema))
+ ;; unless requesting by name, skip system schema
+ (not (and (null owner)
+ (member schema '("information_schema" "sys")
+ :test #'string-equal)))
+ ;; skip system specific tables in mssql2000
+ (not (and (eql :mssql (database-underlying-type database))
+ (member name '("dtproperties" "sysconstraints"
+ "syssegments")
+ :test #'string-equal))))
+ collect name)))
+
+(defmethod database-list-tables ((database generic-odbc-database)
+ &key (owner nil))
+ "Since ODBC doesn't expose the owner we use that parameter to filter
+on schema since that's what tends to be exposed. Some DBs like mssql
+2000 conflate the two so at least there it works nicely."
+ (%database-list-* database "TABLE" owner))
(defmethod database-list-views ((database generic-odbc-database)
- &key (owner nil))
- (declare (ignore owner))
- (multiple-value-bind (rows col-names)
- (funcall (list-all-database-tables-fn database) :db (odbc-conn database))
- (declare (ignore col-names))
- ;; TABLE_SCHEM is hard-coded in second column by ODBC Driver Manager
- ;; TABLE_NAME in third column, TABLE_TYPE in fourth column
- (loop for row in rows
- when (and (not (string-equal "information_schema" (nth 1 row)))
- (string-equal "VIEW" (nth 3 row)))
- collect (nth 2 row))))
+ &key (owner nil))
+ "Since ODBC doesn't expose the owner we use that parameter to filter
+on schema since that's what tends to be exposed. Some DBs like mssql
+2000 conflate the two so at least there it works nicely."
+ (%database-list-* database "VIEW" owner))
-(defmethod database-list-attributes ((table string) (database generic-odbc-database)
- &key (owner nil))
+(defmethod database-list-attributes ((table %database-identifier) (database generic-odbc-database)
+ &key (owner nil)
+ &aux (table (unescaped-database-identifier table)))
(declare (ignore owner))
(multiple-value-bind (rows col-names)
(funcall (list-all-table-columns-fn database) table
- :db (odbc-conn database))
+ :db (odbc-conn database))
(declare (ignore col-names))
;; COLUMN_NAME is hard-coded by odbc spec as fourth position
(loop for row in rows
- collect (fourth row))))
+ collect (fourth row))))
-(defmethod database-attribute-type ((attribute string) (table string) (database generic-odbc-database)
- &key (owner nil))
+(defmethod database-attribute-type ((attribute %database-identifier) (table %database-identifier)
+ (database generic-odbc-database)
+ &key (owner nil)
+ &aux (table (unescaped-database-identifier table))
+ (attribute (unescaped-database-identifier attribute)))
(declare (ignore owner))
(multiple-value-bind (rows col-names)
(funcall (list-all-table-columns-fn database) table
- :db (odbc-conn database))
+ :db (odbc-conn database))
(declare (ignore col-names))
;; COLUMN_NAME is hard-coded by odbc spec as fourth position
;; TYPE_NAME is the sixth column
;; SCALE/DECIMAL_DIGITS is the ninth column
;; NULLABLE is the eleventh column
(loop for row in rows
- when (string-equal attribute (fourth row))
- do
- (let ((size (seventh row))
- (precision (ninth row))
- (scale (nth 10 row)))
- (return (values (ensure-keyword (sixth row))
- (when size (parse-integer size))
- (when precision (parse-integer precision))
- (when scale (parse-integer scale))))))))
+ when (string-equal attribute (fourth row))
+ do
+ (let ((size (seventh row))
+ (precision (ninth row))
+ (scale (nth 10 row)))
+ (return (values (ensure-keyword (sixth row))
+ (when size (parse-integer size))
+ (when precision (parse-integer precision))
+ (when scale (parse-integer scale))))))))
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