+
+;;; Backend methods
+
+(defmethod database-disconnect ((database generic-odbc-database))
+ (funcall (disconnect-fn database) (odbc-conn database))
+ (setf (odbc-conn database) nil)
+ t)
+
+(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)
+ #+ignore
+ (error ()
+ (error 'sql-database-data-error
+ :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))
+ #+ignore
+ (sql-error (e)
+ (error e))
+ #+ignore
+ (error ()
+ (error 'sql-database-data-error
+ :database database
+ :expression sql-expression
+ :message "Execute command failed"))))
+
+
+(defstruct odbc-result-set
+ (query nil)
+ (types nil)
+ (full-set nil :type boolean))
+
+
+
+
+(defmethod database-query-result-set ((query-expression string)
+ (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
+ ))
+ (error ()
+ (error 'sql-database-data-error
+ :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)
+ (let ((row (funcall (fetch-row-fn database)
+ (odbc-result-set-query result-set) nil 'eof)))
+ (if (eq row 'eof)
+ nil
+ (progn
+ (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))
+ (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 "TABLE" (nth 3 row)))
+ collect (nth 2 row))))
+
+
+(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))))
+
+
+(defmethod database-list-attributes ((table string) (database generic-odbc-database)
+ &key (owner nil))
+ (declare (ignore owner))
+ (multiple-value-bind (rows col-names)
+ (funcall (list-all-table-columns-fn database) table
+ :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))))
+
+(defmethod database-attribute-type ((attribute string) (table string) (database generic-odbc-database)
+ &key (owner nil))
+ (declare (ignore owner))
+ (multiple-value-bind (rows col-names)
+ (funcall (list-all-table-columns-fn database) table
+ :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
+ ;; PRECISION/COLUMN_SIZE is the seventh 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))))))))