- (expression-length query-expression)))
- (let ((res-ptr (mysql-use-result mysql-ptr)))
- (if res-ptr
- (unwind-protect
- (let ((num-fields (mysql-num-fields res-ptr)))
- (declare (fixnum num-fields))
- (setq result-types (canonicalize-types
- result-types res-ptr))
- (values
- (loop for row = (mysql-fetch-row res-ptr)
- for lengths = (mysql-fetch-lengths res-ptr)
- until (uffi:null-pointer-p row)
- collect
- (do* ((rlist (make-list num-fields))
- (i 0 (1+ i))
- (pos rlist (cdr pos)))
- ((= i num-fields) rlist)
- (declare (fixnum i))
- (setf (car pos)
- (convert-raw-field
- (uffi:deref-array row '(:array
- (* :unsigned-char))
- i)
- result-types i
- (uffi:deref-array lengths '(:array :unsigned-long)
- i)))))
- (when field-names
- (result-field-names res-ptr))))
- (mysql-free-result res-ptr))
- (error 'sql-database-data-error
- :database database
- :expression query-expression
- :error-id (mysql-errno mysql-ptr)
- :message (mysql-error-string mysql-ptr))))
- (error 'sql-database-data-error
- :database database
- :expression query-expression
- :error-id (mysql-errno mysql-ptr)
- :message (mysql-error-string mysql-ptr))))))
+ (expression-length query-expression)))
+ (let ((res-ptr (mysql-use-result mysql-ptr)))
+ (if (and res-ptr (not (uffi:null-pointer-p res-ptr)))
+ (unwind-protect
+ (let ((num-fields (mysql-num-fields res-ptr)))
+ (declare (fixnum num-fields))
+ (setq result-types (canonicalize-types
+ result-types res-ptr))
+ (values
+ (loop for row = (mysql-fetch-row res-ptr)
+ for lengths = (mysql-fetch-lengths res-ptr)
+ until (uffi:null-pointer-p row)
+ collect
+ (do* ((rlist (make-list num-fields))
+ (i 0 (1+ i))
+ (pos rlist (cdr pos)))
+ ((= i num-fields) rlist)
+ (declare (fixnum i))
+ (setf (car pos)
+ (convert-raw-field
+ (uffi:deref-array row '(:array
+ (* :unsigned-char))
+ i)
+ result-types i
+ (uffi:deref-array lengths '(:array :unsigned-long)
+ i)))))
+ (when field-names
+ (result-field-names res-ptr))))
+ (mysql-free-result res-ptr))
+ (unless (zerop (mysql-errno mysql-ptr))
+ ;;from http://dev.mysql.com/doc/refman/5.0/en/mysql-field-count.html
+ ;; if mysql_use_result or mysql_store_result return a null ptr,
+ ;; we use a mysql_errno check to see if it had a problem or just
+ ;; was a query without a result. If no error, just return nil.
+ (error 'sql-database-data-error
+ :database database
+ :expression query-expression
+ :error-id (mysql-errno mysql-ptr)
+ :message (mysql-error-string mysql-ptr)))))
+ (error 'sql-database-data-error
+ :database database
+ :expression query-expression
+ :error-id (mysql-errno mysql-ptr)
+ :message (mysql-error-string mysql-ptr))))))