1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
4 ;;;; Generic ODBC layer, used by db-odbc and db-aodbc backends
6 ;;;; This file is part of CLSQL.
8 ;;;; CLSQL users are granted the rights to distribute and use this software
9 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
10 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
11 ;;;; *************************************************************************
13 (in-package #:clsql-sys)
15 (defclass generic-odbc-database (database)
16 ((dbi-package :initarg :dbi-package :reader dbi-package)
17 (odbc-conn :initarg :odbc-conn :initform nil :accessor odbc-conn)
18 (disconnect-fn :reader disconnect-fn)
19 (sql-fn :reader sql-fn)
20 (close-query-fn :reader close-query-fn)
21 (fetch-row :reader fetch-row-fn)
22 (list-all-database-tables-fn :reader list-all-database-tables-fn)
23 (list-all-table-columns-fn :reader list-all-table-columns-fn))
24 (:documentation "Encapsulate same behavior across odbc and aodbc backends."))
26 (defmethod initialize-instance :after ((db generic-odbc-database)
28 (declare (ignore all-keys))
29 (unless (slot-boundp db 'dbi-package)
30 (error "dbi-package not specified."))
31 (let ((pkg (slot-value db 'dbi-package)))
33 (error "dbi-package is nil."))
34 (setf (slot-value db 'disconnect-fn)
35 (intern (symbol-name '#:disconnect) pkg)
36 (slot-value db 'sql-fn)
37 (intern (symbol-name '#:sql) pkg)
38 (slot-value db 'close-query-fn)
39 (intern (symbol-name '#:close-query) pkg)
40 (slot-value db 'fetch-row)
41 (intern (symbol-name '#:fetch-row) pkg)
42 (slot-value db 'list-all-database-tables-fn)
43 (intern (symbol-name '#:list-all-database-tables) pkg)
44 (slot-value db 'list-all-table-columns-fn)
45 (intern (symbol-name '#:list-all-table-columns) pkg))))
49 (defmethod read-sql-value (val (type (eql 'boolean))
50 (database generic-odbc-database)
51 (db-type (eql :postgresql)))
52 (if (string= "0" val) nil t))
54 (defmethod read-sql-value (val (type (eql 'generalized-boolean))
55 (database generic-odbc-database)
56 (db-type (eql :postgresql)))
57 (if (string= "0" val) nil t))
59 (defmethod read-sql-value (val (type (eql 'boolean)) database
60 (db-type (eql :mssql)))
61 (declare (ignore database))
63 (string (if (string= "0" val) nil t))
64 (integer (if (zerop val) nil t))))
66 (defmethod read-sql-value (val (type (eql 'generalized-boolean)) database
67 (db-type (eql :mssql)))
68 (declare (ignore database))
70 (string (if (string= "0" val) nil t))
71 (integer (if (zerop val) nil t))))
75 (defmethod database-get-type-specifier ((type (eql 'wall-time)) args database
76 (db-type (eql :mssql)))
77 (declare (ignore args database))
79 (defmethod database-get-type-specifier ((type (eql 'date)) args database
80 (db-type (eql :mssql)))
81 (declare (ignore args database))
84 (defmethod database-get-type-specifier ((type (eql 'boolean)) args database
85 (db-type (eql :mssql)))
86 (declare (ignore args database))
89 (defmethod database-get-type-specifier ((type (eql 'generalized-boolean)) args database
90 (db-type (eql :mssql)))
91 (declare (ignore args database))
94 ;;; Generation of SQL strings from lisp expressions
96 (defmethod database-output-sql ((tee (eql t)) (database generic-odbc-database))
97 (case (database-underlying-type database)
101 (defmethod database-output-sql-as-type ((type (eql 'boolean)) val database
102 (db-type (eql :mssql)))
103 (declare (ignore database))
106 (defmethod database-output-sql-as-type ((type (eql 'generalized-boolean)) val database
107 (db-type (eql :mssql)))
108 (declare (ignore database))
111 ;;; Database backend capabilities
113 (defmethod db-type-use-fully-qualified-column-on-drop-index? ((db-type (eql :mssql)))
116 (defmethod db-type-has-boolean-where? ((db-type (eql :mssql)))
119 (defmethod db-type-has-intersect? ((db-type (eql :mssql)))
122 (defmethod db-type-has-except? ((db-type (eql :mssql)))
127 (defmethod database-disconnect ((database generic-odbc-database))
128 (funcall (disconnect-fn database) (odbc-conn database))
129 (setf (odbc-conn database) nil)
132 (defmethod database-query (query-expression (database generic-odbc-database)
133 result-types field-names)
135 (funcall (sql-fn database)
136 query-expression :db (odbc-conn database)
137 :result-types result-types
138 :column-names field-names)
141 (error 'sql-database-data-error
143 :expression query-expression
144 :message "Query failed"))))
147 (defmethod database-execute-command (sql-expression (database generic-odbc-database))
149 (funcall (sql-fn database)
150 sql-expression :db (odbc-conn database))
156 (error 'sql-database-data-error
158 :expression sql-expression
159 :message "Execute command failed"))))
162 (defstruct odbc-result-set
165 (full-set nil :type boolean))
170 (defmethod database-query-result-set ((query-expression string)
171 (database generic-odbc-database)
172 &key full-set result-types)
174 (multiple-value-bind (query column-names)
175 (funcall (sql-fn database)
177 :db (odbc-conn database)
181 :result-types result-types)
183 (make-odbc-result-set :query query :full-set full-set
185 (length column-names)
186 nil ;; not able to return number of rows with odbc
189 (error 'sql-database-data-error
191 :expression query-expression
192 :message "Query result set failed"))))
194 (defmethod database-dump-result-set (result-set (database generic-odbc-database))
195 (funcall (close-query-fn database) (odbc-result-set-query result-set))
198 (defmethod database-store-next-row (result-set
199 (database generic-odbc-database)
201 (let ((row (funcall (fetch-row-fn database)
202 (odbc-result-set-query result-set) nil 'eof)))
206 (loop for elem in row
209 (setf (car rest) elem))
213 (defun %database-list-* (database type owner)
214 "Internal function used by database-list-tables and
216 (multiple-value-bind (rows col-names)
217 (funcall (list-all-database-tables-fn database) :db (odbc-conn database))
218 (declare (ignore col-names))
219 ;; http://msdn.microsoft.com/en-us/library/ms711831%28VS.85%29.aspx
220 ;; TABLE_SCHEM is hard-coded in second column by ODBC Driver Manager
221 ;; TABLE_NAME in third column, TABLE_TYPE in fourth column
222 (loop for (category schema name ttype . rest) in rows
223 when (and (string-equal type ttype)
224 (or (null owner) (string-equal owner schema))
225 ;; unless requesting by name, skip system schema
226 (not (and (null owner)
227 (member schema '("information_schema" "sys")
228 :test #'string-equal)))
229 ;; skip system specific tables in mssql2000
230 (not (and (eql :mssql (database-underlying-type database))
231 (member name '("dtproperties" "sysconstraints"
233 :test #'string-equal))))
236 (defmethod database-list-tables ((database generic-odbc-database)
238 "Since ODBC doesn't expose the owner we use that parameter to filter
239 on schema since that's what tends to be exposed. Some DBs like mssql
240 2000 conflate the two so at least there it works nicely."
241 (%database-list-* database "TABLE" owner))
244 (defmethod database-list-views ((database generic-odbc-database)
246 "Since ODBC doesn't expose the owner we use that parameter to filter
247 on schema since that's what tends to be exposed. Some DBs like mssql
248 2000 conflate the two so at least there it works nicely."
249 (%database-list-* database "VIEW" owner))
252 (defmethod database-list-attributes ((table string) (database generic-odbc-database)
254 (declare (ignore owner))
255 (multiple-value-bind (rows col-names)
256 (funcall (list-all-table-columns-fn database) table
257 :db (odbc-conn database))
258 (declare (ignore col-names))
259 ;; COLUMN_NAME is hard-coded by odbc spec as fourth position
260 (loop for row in rows
261 collect (fourth row))))
263 (defmethod database-attribute-type ((attribute string) (table string) (database generic-odbc-database)
265 (declare (ignore owner))
266 (multiple-value-bind (rows col-names)
267 (funcall (list-all-table-columns-fn database) table
268 :db (odbc-conn database))
269 (declare (ignore col-names))
270 ;; COLUMN_NAME is hard-coded by odbc spec as fourth position
271 ;; TYPE_NAME is the sixth column
272 ;; PRECISION/COLUMN_SIZE is the seventh column
273 ;; SCALE/DECIMAL_DIGITS is the ninth column
274 ;; NULLABLE is the eleventh column
275 (loop for row in rows
276 when (string-equal attribute (fourth row))
278 (let ((size (seventh row))
279 (precision (ninth row))
280 (scale (nth 10 row)))
281 (return (values (ensure-keyword (sixth row))
282 (when size (parse-integer size))
283 (when precision (parse-integer precision))
284 (when scale (parse-integer scale))))))))