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308 lines
12 KiB
PHP
308 lines
12 KiB
PHP
<?php
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// +----------------------------------------------------------------------+
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// | PHP versions 4 and 5 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
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// | Stig. S. Bakken, Lukas Smith |
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// | All rights reserved. |
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// +----------------------------------------------------------------------+
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// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
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// | API as well as database abstraction for PHP applications. |
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// | This LICENSE is in the BSD license style. |
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// | |
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// | Redistribution and use in source and binary forms, with or without |
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// | modification, are permitted provided that the following conditions |
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// | are met: |
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// | |
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// | Redistributions of source code must retain the above copyright |
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// | notice, this list of conditions and the following disclaimer. |
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// | |
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// | Redistributions in binary form must reproduce the above copyright |
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// | notice, this list of conditions and the following disclaimer in the |
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// | documentation and/or other materials provided with the distribution. |
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// | |
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// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
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// | Lukas Smith nor the names of his contributors may be used to endorse |
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// | or promote products derived from this software without specific prior|
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// | written permission. |
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// | |
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// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
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// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
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// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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// | POSSIBILITY OF SUCH DAMAGE. |
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// +----------------------------------------------------------------------+
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// | Author: Lukas Smith <smith@backendmedia.com> |
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// +----------------------------------------------------------------------+
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//
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// $Id$
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//
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require_once 'MDB2/Driver/Reverse/Common.php';
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/**
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* MDB2 SQlite driver for the schema reverse engineering module
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*
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* @package MDB2
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* @category Database
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* @author Lukas Smith <smith@backendmedia.com>
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*/
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class MDB2_Driver_Reverse_sqlite extends MDB2_Driver_Reverse_Common
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{
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function _getTableColumns($query)
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{
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$start_pos = strpos($query, '(');
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$end_pos = strrpos($query, ')');
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$column_def = substr($query, $start_pos+1, $end_pos-$start_pos-1);
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$column_sql = split(',', $column_def);
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$columns = array();
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$count = count($column_sql);
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if ($count == 0) {
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return $db->raiseError('unexpected empty table column definition list');
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}
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$regexp = '/^([^ ]+) (CHAR|VARCHAR|VARCHAR2|TEXT|INT|INTEGER|BIGINT|DOUBLE|FLOAT|DATETIME|DATE|TIME|LONGTEXT|LONGBLOB)( PRIMARY)?( \(([1-9][0-9]*)(,([1-9][0-9]*))?\))?( DEFAULT (\'[^\']*\'|[^ ]+))?( NOT NULL)?$/i';
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for ($i=0, $j=0; $i<$count; ++$i) {
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if (!preg_match($regexp, $column_sql[$i], $matches)) {
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return $db->raiseError('unexpected table column SQL definition');
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}
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$columns[$j]['name'] = $matches[1];
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$columns[$j]['type'] = strtolower($matches[2]);
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if (isset($matches[5]) && strlen($matches[5])) {
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$columns[$j]['length'] = $matches[5];
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}
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if (isset($matches[7]) && strlen($matches[7])) {
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$columns[$j]['decimal'] = $matches[7];
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}
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if (isset($matches[9]) && strlen($matches[9])) {
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$default = $matches[9];
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if (strlen($default) && $default[0]=="'") {
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$default = str_replace("''", "'", substr($default, 1, strlen($default)-2));
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}
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$columns[$j]['default'] = $default;
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}
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if (isset($matches[10]) && strlen($matches[10])) {
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$columns[$j]['notnull'] = true;
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}
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++$j;
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}
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return $columns;
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}
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// {{{ getTableFieldDefinition()
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/**
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* get the stucture of a field into an array
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*
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* @param string $table name of table that should be used in method
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* @param string $field_name name of field that should be used in method
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function getTableFieldDefinition($table, $field_name)
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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$result = $db->loadModule('Datatype');
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if (PEAR::isError($result)) {
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return $result;
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}
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$query = "SELECT sql FROM sqlite_master WHERE type='table' AND name='$table'";
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$query = $db->queryOne($query);
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if (PEAR::isError($query)) {
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return $query;
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}
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if (PEAR::isError($columns = $this->_getTableColumns($query))) {
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return $columns;
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}
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foreach ($columns as $column) {
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if ($db->options['portability'] & MDB2_PORTABILITY_LOWERCASE) {
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$column['name'] = strtolower($column['name']);
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} else {
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$column = array_change_key_case($column, CASE_LOWER);
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}
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if ($field_name == $column['name']) {
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list($types, $length) = $db->datatype->mapNativeDatatype($column);
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unset($notnull);
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if (isset($column['null']) && $column['null'] != 'YES') {
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$notnull = true;
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}
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unset($default);
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if (isset($column['default'])) {
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$default = $column['default'];
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}
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$definition = array();
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foreach ($types as $key => $type) {
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$definition[0][$key] = array('type' => $type);
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if (isset($notnull)) {
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$definition[0][$key]['notnull'] = true;
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}
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if (isset($default)) {
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$definition[0][$key]['default'] = $default;
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}
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if (isset($length)) {
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$definition[0][$key]['length'] = $length;
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}
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}
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// todo .. handle auto_inrement and primary keys
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return $definition;
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}
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}
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return $db->raiseError(MDB2_ERROR, null, null,
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'getTableFieldDefinition: it was not specified an existing table column');
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}
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// }}}
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// {{{ getTableIndexDefinition()
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/**
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* get the stucture of an index into an array
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*
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* @param string $table name of table that should be used in method
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* @param string $index_name name of index that should be used in method
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function getTableIndexDefinition($table, $index_name)
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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if ($index_name == 'PRIMARY') {
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return $db->raiseError(MDB2_ERROR, null, null,
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'getTableIndexDefinition: PRIMARY is an hidden index');
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}
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$query = "SELECT sql FROM sqlite_master WHERE type='index' AND name='$index_name' AND tbl_name='$table' AND sql NOT NULL ORDER BY name";
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$result = $db->query($query);
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if (PEAR::isError($result)) {
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return $result;
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}
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$columns = $result->getColumnNames();
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$column = 'sql';
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if (!isset($columns[$column])) {
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$result->free();
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return $db->raiseError('getTableIndexDefinition: show index does not return the table creation sql');
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}
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$query = strtolower($result->fetchOne());
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$unique = strstr($query, ' unique ');
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$key_name = $index_name;
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$start_pos = strpos($query, '(');
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$end_pos = strrpos($query, ')');
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$column_names = substr($query, $start_pos+1, $end_pos-$start_pos-1);
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$column_names = split(',', $column_names);
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$definition = array();
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if ($unique) {
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$definition['unique'] = true;
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}
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$count = count($column_names);
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for ($i=0; $i<$count; ++$i) {
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$column_name = strtok($column_names[$i]," ");
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$collation = strtok(" ");
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$definition['fields'][$column_name] = array();
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if (!empty($collation)) {
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$definition['fields'][$column_name]['sorting'] = ($collation=='ASC' ? 'ascending' : 'descending');
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}
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}
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$result->free();
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if (!isset($definition['fields'])) {
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return $db->raiseError(MDB2_ERROR, null, null,
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'getTableIndexDefinition: it was not specified an existing table index');
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}
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return $definition;
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}
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// }}}
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// {{{ tableInfo()
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/**
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* Returns information about a table
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*
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* @param string $result a string containing the name of a table
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* @param int $mode a valid tableInfo mode
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*
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* @return array an associative array with the information requested.
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* A MDB2_Error object on failure.
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*
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* @see MDB2_common::tableInfo()
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* @since Method available since Release 1.7.0
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*/
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function tableInfo($result, $mode = null)
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{
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$db =& $GLOBALS['_MDB2_databases'][$this->db_index];
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if (is_string($result)) {
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/*
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* Probably received a table name.
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* Create a result resource identifier.
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*/
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$id = $db->queryAll("PRAGMA table_info('$result');", null, MDB2_FETCHMODE_ASSOC);
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$got_string = true;
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} else {
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return $db->raiseError(MDB2_ERROR_NOT_CAPABLE, null, null,
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'This DBMS can not obtain tableInfo' .
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' from result sets');
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}
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if ($db->options['portability'] & MDB2_PORTABILITY_LOWERCASE) {
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$case_func = 'strtolower';
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} else {
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$case_func = 'strval';
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}
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$count = count($id);
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$res = array();
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if ($mode) {
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$res['num_fields'] = $count;
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}
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for ($i = 0; $i < $count; $i++) {
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if (strpos($id[$i]['type'], '(') !== false) {
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$bits = explode('(', $id[$i]['type']);
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$type = $bits[0];
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$len = rtrim($bits[1],')');
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} else {
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$type = $id[$i]['type'];
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$len = 0;
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}
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$flags = '';
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if ($id[$i]['pk']) {
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$flags .= 'primary_key ';
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}
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if ($id[$i]['notnull']) {
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$flags .= 'not_null ';
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}
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if ($id[$i]['dflt_value'] !== null) {
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$flags .= 'default_' . rawurlencode($id[$i]['dflt_value']);
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}
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$flags = trim($flags);
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$res[$i] = array(
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'table' => $case_func($result),
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'name' => $case_func($id[$i]['name']),
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'type' => $type,
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'len' => $len,
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'flags' => $flags,
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);
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if ($mode & MDB2_TABLEINFO_ORDER) {
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$res['order'][$res[$i]['name']] = $i;
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}
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if ($mode & MDB2_TABLEINFO_ORDERTABLE) {
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$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
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}
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}
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return $res;
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}
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}
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?>
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