--- /dev/null
+;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name: sqlite-sql.lisp
+;;;; Purpose: High-level SQLite3 interface
+;;;; Authors: Aurelio Bignoli
+;;;; Created: Oct 2004
+;;;;
+;;;; $Id$
+;;;;
+;;;; This file, part of CLSQL, is Copyright (c) 2004 by Aurelio Bignoli
+;;;;
+;;;; CLSQL users are granted the rights to distribute and use this software
+;;;; as governed by the terms of the Lisp Lesser GNU Public License
+;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
+;;;; *************************************************************************
+
+(in-package #:clsql-sqlite3)
+
+(defclass sqlite3-database (database)
+ ((sqlite3-db :initarg :sqlite3-db :accessor sqlite3-db)))
+
+(defmethod database-type ((database sqlite3-database))
+ :sqlite3)
+
+(defmethod database-initialize-database-type ((database-type (eql :sqlite3)))
+ t)
+
+(defun check-sqlite3-connection-spec (connection-spec)
+ (check-connection-spec connection-spec :sqlite3 (name &optional init-foreign-func)))
+
+(defmethod database-name-from-spec (connection-spec
+ (database-type (eql :sqlite3)))
+ (check-sqlite3-connection-spec connection-spec)
+ (first connection-spec))
+
+(defmethod database-connect (connection-spec (database-type (eql :sqlite3)))
+ (check-sqlite3-connection-spec connection-spec)
+ (handler-case
+ (let ((db (sqlite3:sqlite3-open (first connection-spec)))
+ (init-foreign-func (second connection-spec)))
+ (declare (type sqlite3:sqlite3-db-type db))
+ (when init-foreign-func
+ (handler-case
+ (funcall init-foreign-func db)
+ (condition (c)
+ (progn
+ (sqlite3:sqlite3-close db)
+ (error c)))))
+ (make-instance 'sqlite3-database
+ :name (database-name-from-spec connection-spec :sqlite3)
+ :database-type :sqlite3
+ :connection-spec connection-spec
+ :sqlite3-db db))
+ (sqlite3:sqlite3-error (err)
+ (error 'sql-connection-error
+ :database-type database-type
+ :connection-spec connection-spec
+ :error-id (sqlite3:sqlite3-error-code err)
+ :message (sqlite3:sqlite3-error-message err)))))
+
+(defmethod database-disconnect ((database sqlite3-database))
+ (sqlite3:sqlite3-close (sqlite3-db database))
+ (setf (sqlite3-db database) nil)
+ t)
+
+(defmethod database-execute-command (sql-expression (database sqlite3-database))
+ (handler-case
+ (let ((stmt (sqlite3:sqlite3-prepare (sqlite3-db database) sql-expression)))
+ (declare (type sqlite3:sqlite3-stmt-type stmt))
+ (when stmt
+ (unwind-protect
+ (sqlite3:sqlite3-step stmt)
+ (sqlite3:sqlite3-finalize stmt))))
+ (sqlite3:sqlite3-error (err)
+ (error 'sql-database-data-error
+ :database database
+ :expression sql-expression
+ :error-id (sqlite3:sqlite3-error-code err)
+ :message (sqlite3:sqlite3-error-message err))))
+ t)
+
+(defstruct sqlite3-result-set
+ (stmt sqlite3:null-stmt
+ :type sqlite3:sqlite3-stmt-type)
+ (n-col 0 :type fixnum)
+ (col-names '())
+ (result-types '()))
+
+(declaim (ftype (function (sqlite3:sqlite3-stmt-type fixnum t) list) get-result-types))
+(defun get-result-types (stmt n-col result-types)
+ (declare (type sqlite3:sqlite3-stmt-type stmt) (type fixnum n-col))
+ (if (eq :auto result-types)
+ (loop for n from 0 below n-col
+ collect (let ((column-type (sqlite3:sqlite3-column-type stmt n)))
+ (cond
+ ((= column-type sqlite3:SQLITE-INTEGER) :int64)
+ ((= column-type sqlite3:SQLITE-FLOAT) :double)
+ ((= column-type sqlite3:SQLITE-TEXT) :string)
+ ((= column-type sqlite3:SQLITE-BLOB) :blob)
+ ((= column-type sqlite3:SQLITE-NULL) :string)
+ (t :string))))
+ (loop for type in result-types
+ collect (case type
+ ((:int :integer :tinyint :long) :int32)
+ (:bigint :int64)
+ ((:float :double) :double)
+ ((:numeric) :number)
+ (otherwise :string)))))
+
+(defmethod database-query-result-set ((query-expression string)
+ (database sqlite3-database)
+ &key result-types full-set)
+ (let ((stmt sqlite3:null-stmt))
+ (declare (type sqlite3:sqlite3-stmt-type stmt))
+ (handler-case
+ (progn
+ (setf stmt (sqlite3:sqlite3-prepare (sqlite3-db database)
+ query-expression))
+ (let* ((n-col (if (sqlite3:sqlite3-step stmt)
+ ;; Non empty result set.
+ (sqlite3:sqlite3-column-count stmt)
+ ;; Empty result set.
+ 0))
+ (result-set (make-sqlite3-result-set
+ :stmt stmt
+ :n-col n-col
+ :col-names (loop for n from 0 below n-col
+ collect (sqlite3:sqlite3-column-name stmt n))
+ :result-types (when (> n-col 0)
+ (get-result-types stmt n-col result-types)))))
+ (if full-set
+ (values result-set n-col nil)
+ (values result-set n-col))))
+ (sqlite3:sqlite3-error (err)
+ (progn
+ (unless (eq stmt sqlite3:null-stmt)
+ (ignore-errors
+ (sqlite3:sqlite3-finalize stmt)))
+ (error 'sql-database-data-error
+ :database database
+ :expression query-expression
+ :error-id (sqlite3:sqlite3-error-code err)
+ :message (sqlite3:sqlite3-error-message err)))))))
+
+(defmethod database-dump-result-set (result-set (database sqlite3-database))
+ (handler-case
+ (sqlite3:sqlite3-finalize (sqlite3-result-set-stmt result-set))
+ (sqlite3:sqlite3-error (err)
+ (error 'sql-database-error
+ :message
+ (format nil "Error finalizing SQLite3 statement: ~A"
+ (sqlite3:sqlite3-error-message err))))))
+
+(defmethod database-store-next-row (result-set (database sqlite3-database) list)
+ (let ((n-col (sqlite3-result-set-n-col result-set)))
+ (if (= n-col 0)
+ ;; empty result set.
+ nil
+ ;; Non-empty set.
+ (let ((stmt (sqlite3-result-set-stmt result-set)))
+ (declare (type sqlite3:sqlite3-stmt-type stmt))
+ ;; Store row in list.
+ (loop for i = 0 then (1+ i)
+ for rest on list
+ for types = (sqlite3-result-set-result-types result-set) then (rest types)
+ do (setf (car rest)
+ (if (eq (first types) :blob)
+ (clsql-uffi:convert-raw-field
+ (sqlite3:sqlite3-column-blob stmt i)
+ types 0
+ (sqlite3:sqlite3-column-bytes stmt i))
+ (clsql-uffi:convert-raw-field
+ (sqlite3:sqlite3-column-text stmt i)
+ types 0))))
+ ;; Advance result set cursor.
+ (handler-case
+ (unless (sqlite3:sqlite3-step stmt)
+ (setf (sqlite3-result-set-n-col result-set) 0))
+ (sqlite3:sqlite3-error (err)
+ (error 'sql-database-error
+ :message "Error in sqlite3-step: ~A"
+ (sqlite3:sqlite3-error-message err))))
+ t))))
+
+
+(defmethod database-query (query-expression (database sqlite3-database) result-types field-names)
+ (declare (optimize (speed 3) (safety 0) (debug 0) (space 0)))
+ (handler-case
+ (let ((stmt (sqlite3:sqlite3-prepare (sqlite3-db database)
+ query-expression))
+ (rows '())
+ (col-names '()))
+ (declare (type sqlite3:sqlite3-stmt-type stmt))
+ (unwind-protect
+ (when (sqlite3:sqlite3-step stmt)
+ (let ((n-col (sqlite3:sqlite3-column-count stmt)))
+ (flet ((extract-row-data ()
+ (loop for i from 0 below n-col
+ for types = (get-result-types stmt n-col result-types) then (rest types)
+ collect (if (eq (first types) :blob)
+ (clsql-uffi:convert-raw-field
+ (sqlite3:sqlite3-column-blob stmt i)
+ types 0
+ (sqlite3:sqlite3-column-bytes stmt i))
+ (clsql-uffi:convert-raw-field
+ (sqlite3:sqlite3-column-text stmt i)
+ types 0)))))
+ (when field-names
+ (setf col-names (loop for n from 0 below n-col
+ collect (sqlite3:sqlite3-column-name stmt n))))
+ (push (extract-row-data) rows)
+ (do* () (nil)
+ (if (sqlite3:sqlite3-step stmt)
+ (push (extract-row-data) rows)
+ (return))))))
+ (sqlite3:sqlite3-finalize stmt))
+ (values (nreverse rows) col-names))
+ (sqlite3:sqlite3-error (err)
+ (error 'sql-database-data-error
+ :database database
+ :expression query-expression
+ :error-id (sqlite3:sqlite3-error-code err)
+ :message (sqlite3:sqlite3-error-message err)))))
+
+;;; Object listing
+
+(defmethod database-list-tables-and-sequences ((database sqlite3-database) &key owner)
+ (declare (ignore owner))
+ ;; Query is copied from .table command of sqlite3 command line utility.
+ (mapcar #'car (database-query
+ "SELECT name FROM sqlite_master WHERE type='table' UNION ALL SELECT name FROM sqlite_temp_master WHERE type='table' ORDER BY name"
+ database nil nil)))
+
+(defmethod database-list-tables ((database sqlite3-database) &key owner)
+ (remove-if #'(lambda (s)
+ (and (>= (length s) 11)
+ (string-equal (subseq s 0 11) "_CLSQL_SEQ_")))
+ (database-list-tables-and-sequences database :owner owner)))
+
+(defmethod database-list-views ((database sqlite3-database)
+ &key (owner nil))
+ (declare (ignore owner))
+ (mapcar #'car (database-query
+ "SELECT name FROM sqlite_master WHERE type='view' UNION ALL SELECT name FROM sqlite_temp_master WHERE type='view' ORDER BY name"
+ database nil nil)))
+
+(defmethod database-list-indexes ((database sqlite3-database)
+ &key (owner nil))
+ (declare (ignore owner))
+ (mapcar #'car (database-query
+ "SELECT name FROM sqlite_master WHERE type='index' UNION ALL SELECT name FROM sqlite_temp_master WHERE type='index' ORDER BY name"
+ database nil nil)))
+
+(defmethod database-list-table-indexes (table (database sqlite3-database)
+ &key (owner nil))
+ (declare (ignore owner))
+ (let ((*print-circle* nil))
+ (mapcar #'car
+ (database-query
+ (format
+ nil
+ "SELECT name FROM sqlite_master WHERE type='index' AND tbl_name='~A' UNION ALL SELECT name FROM sqlite_temp_master WHERE type='index' AND tbl_name='~A' ORDER BY name"
+ table table)
+ database nil nil))))
+
+(declaim (inline sqlite3-table-info))
+(defun sqlite3-table-info (table database)
+ (database-query (format nil "PRAGMA table_info('~A')" table)
+ database nil nil))
+
+(defmethod database-list-attributes (table (database sqlite3-database)
+ &key (owner nil))
+ (declare (ignore owner))
+ (mapcar #'(lambda (table-info) (second table-info))
+ (sqlite3-table-info table database)))
+
+(defmethod database-attribute-type (attribute table
+ (database sqlite3-database)
+ &key (owner nil))
+ (declare (ignore owner))
+ (loop for field-info in (sqlite3-table-info table database)
+ when (string= attribute (second field-info))
+ return
+ (let* ((raw-type (third field-info))
+ (start-length (position #\( raw-type))
+ (type (if start-length
+ (subseq raw-type 0 start-length)
+ raw-type))
+ (length (if start-length
+ (parse-integer (subseq raw-type (1+ start-length))
+ :junk-allowed t)
+ nil)))
+ (values (when type (ensure-keyword type))
+ length
+ nil
+ (if (string-equal (fourth field-info) "0")
+ 1 0)))))
+
+(defmethod database-create (connection-spec (type (eql :sqlite3)))
+ (declare (ignore connection-spec))
+ ;; databases are created automatically by Sqlite3
+ t)
+
+(defmethod database-destroy (connection-spec (type (eql :sqlite3)))
+ (destructuring-bind (name) connection-spec
+ (if (probe-file name)
+ (delete-file name)
+ nil)))
+
+(defmethod database-probe (connection-spec (type (eql :sqlite3)))
+ (destructuring-bind (name) connection-spec
+ ;; TODO: Add a test that this file is a real sqlite3 database
+ (or (string-equal ":memory:" name)
+ (and (probe-file name) t))))
+
+;;; Database capabilities
+
+(defmethod db-type-has-boolean-where? ((db-type (eql :sqlite3)))
+ nil)
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