924 lines
29 KiB
PHP
924 lines
29 KiB
PHP
<?php
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/**
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* @package SQLite Integration
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* @author Kojima Toshiyasu, Justin Adie
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*
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*/
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/**
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* This class does the real work
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* accepts a request from wpdb class, initialize PDO instance,
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* execute SQL statement, and returns the results to wpdb class.
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*/
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class PDOEngine extends PDO {
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public $is_error = false;
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public $found_rows_result;
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private $rewritten_query;
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private $query_type;
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private $results = null;
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private $_results = null;
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private $pdo;
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private $prepared_query;
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private $extracted_variables = array();
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private $error_messages = array();
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private $errors;
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public $queries = array();
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private $last_insert_id;
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private $affected_rows;
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private $column_names;
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private $num_rows;
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private $return_value;
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private $can_insert_multiple_rows = false;
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private $param_num;
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protected $has_active_transaction = false;
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/**
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* Constructor
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* @param array $DatabaseParams
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*/
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function __construct() {
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$this->init();
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}
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function __destruct() {
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$this->pdo = null;
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return true;
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}
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/**
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* Function to initialize database
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* checks if there's a database directory and database file, creates the tables,
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* and binds the user defined function to the pdo object
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* @return boolean
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*/
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private function init() {
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$dsn = 'sqlite:' . FQDB;
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$result = $this->prepare_directory();
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if (!$result) return false;
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if (is_file(FQDB)) {
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$locked = false;
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do {
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try {
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if ($locked) $locked = false;
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$this->pdo = new PDO(
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$dsn, // data source name
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null, // user name
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null, // user password
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array( // PDO options
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PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
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));
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$statement = $this->pdo->query("SELECT COUNT(*) FROM sqlite_master WHERE type='table'");
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$number_of_tables = $statement->fetchColumn(0);
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$statement = null;
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if ($number_of_tables == 0) {
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$this->make_sqlite_tables();
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}
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} catch (PDOException $err) {
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$status = $err->getCode();
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// code 5 => The database file is locked
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// code 6 => A table in the database is locked
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if ($status == 5 || $status == 6) {
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$locked = true;
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} else {
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$message = __("Database connection error!<br />", 'sqlite-integration');
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$message .= sprintf(__("Error message is: %s", 'sqlite-integration'), $err->getMessage());
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$this->set_error(__LINE__, __FUNCTION__, $message);
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return false;
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}
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}
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} while ($locked);
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require_once UDF_FILE;
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new PDOSQLiteUDFS($this->pdo);
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if (version_compare($this->get_sqlite_version(), '3.7.11', '>=')) {
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$this->can_insert_multiple_rows = true;
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}
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} else { // database file is not found, so we make it and create tables...
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try {
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$this->pdo = new PDO($dsn, null, null, array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));
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} catch (PDOException $err) {
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$message = __("Database connection error!<br />", 'sqlite-integration');
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$message .= sprintf(__("Error message is: %s", 'sqlite-integration'), $err->getMessage());
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$this->set_error(__LINE__, __FUNCTION__, $message);
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return false;
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}
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$this->make_sqlite_tables();
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}
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}
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/**
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* Make database direcotry and .htaccess file
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* executed once while installation process
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*/
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private function prepare_directory() {
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global $wpdb;
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$u = umask(0000);
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if (!is_dir(FQDBDIR)) {
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if (!@mkdir(FQDBDIR, 0777, true)) {
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umask($u);
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$message = 'Unable to create the required directory! Please check your server settings.';
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echo $message;
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return false;
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}
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}
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if (!is_writable(FQDBDIR)) {
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umask($u);
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$message = 'Unable to create a file in the directory! Please check your server settings.';
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echo $message;
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return false;
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}
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if (!is_file(FQDBDIR . '.htaccess')) {
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$fh = fopen(FQDBDIR . '.htaccess', "w");
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if (!$fh) {
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umask($u);
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$message = 'Unable to create a file in the directory! Please check your server settings.';
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echo $message;
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return false;
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}
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fwrite($fh, "DENY FROM ALL");
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fclose($fh);
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}
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umask($u);
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return true;
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}
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/**
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* Make database file itself and WordPress tables
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* executed once while installation process
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*/
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private function make_sqlite_tables() {
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require_once PDODIR . "install.php";
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}
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public function query($query) {
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$this->flush();
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$this->queries[] = "Raw query:\t$query";
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$res = $this->determine_query_type($query);
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if (!$res) {
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$bailoutString = sprintf(__("<h1>Unknown query type</h1><p>Sorry, we cannot determine the type of query that is requested.</p><p>The query is %s</p>", 'sqlite-integration'), $query);
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$this->set_error(__LINE__, __FUNCTION__, $bailoutString);
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}
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switch (strtolower($this->query_type)) {
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case 'foundrows':
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$this->results = $this->found_rows_result;
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$this->num_rows = count($this->results);
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$this->found_rows_result = null;
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break;
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case 'insert':
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if ($this->can_insert_multiple_rows) {
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$this->execute_insert_query_new($query);
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} else {
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$this->execute_insert_query($query);
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}
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break;
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case 'create':
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$result = $this->execute_create_query($query);
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$this->return_value = $result;
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break;
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case 'alter':
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$result = $this->execute_alter_query($query);
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$this->return_value = $result;
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break;
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case 'show_variables':
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$result = $this->show_variables_workaround($query);
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break;
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case 'drop_index':
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$pattern = '/^\\s*(DROP\\s*INDEX\\s*.*?)\\s*ON\\s*(.*)/im';
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if (preg_match($pattern, $query, $match)) {
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$drop_query = 'ALTER TABLE ' . trim($match[2]) . ' ' . trim($match[1]);
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$this->query_type = 'alter';
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$result = $this->execute_alter_query($drop_query);
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$this->return_value = $result;
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} else {
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$this->return_value = false;
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}
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break;
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default:
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$engine = $this->prepare_engine($this->query_type);
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$this->rewritten_query = $engine->rewrite_query($query, $this->query_type);
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$this->queries[] = "Rewritten: $this->rewritten_query";
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$this->extract_variables();
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$statement = $this->prepare_query();
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$this->execute_query($statement);
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if (!$this->is_error) {
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$this->process_results($engine);
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} else {// Error
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;
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}
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break;
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}
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if (defined('PDO_DEBUG') && PDO_DEBUG === true) {
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file_put_contents(FQDBDIR . 'debug.txt', $this->get_debug_info(), FLIE_APPEND);
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}
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return $this->return_value;
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}
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public function get_insert_id() {
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return $this->last_insert_id;
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}
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public function get_affected_rows() {
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return $this->affected_rows;
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}
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public function get_columns() {
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return $this->column_names;
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}
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public function get_query_results() {
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return $this->results;
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}
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public function get_num_rows() {
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return $this->num_rows;
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}
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public function get_return_value() {
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return $this->return_value;
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}
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public function get_error_message(){
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if (count($this->error_messages) === 0){
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$this->is_error = false;
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$this->error_messages = array();
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return '';
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}
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$output = '<div style="clear:both"> </div>';
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if ($this->is_error === false){
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// return $output;
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return '';
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}
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$output .= "<div class=\"queries\" style=\"clear:both; margin_bottom:2px; border: red dotted thin;\">Queries made or created this session were<br/>\r\n\t<ol>\r\n";
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foreach ($this->queries as $q){
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$output .= "\t\t<li>".$q."</li>\r\n";
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}
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$output .= "\t</ol>\r\n</div>";
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foreach ($this->error_messages as $num=>$m){
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$output .= "<div style=\"clear:both; margin_bottom:2px; border: red dotted thin;\" class=\"error_message\" style=\"border-bottom:dotted blue thin;\">Error occurred at line {$this->errors[$num]['line']} in Function {$this->errors[$num]['function']}. <br/> Error message was: $m </div>";
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}
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ob_start();
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debug_print_backtrace();
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$output .= "<pre>" . ob_get_contents() . "</pre>";
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ob_end_clean();
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return $output;
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}
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private function get_debug_info(){
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$output = '';
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foreach ($this->queries as $q){
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$output .= $q ."\r\n";
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}
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return $output;
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}
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private function flush(){
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$this->rewritten_query = '';
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$this->query_type = '';
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$this->results = null;
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$this->_results = null;
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$this->last_insert_id = null;
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$this->affected_rows = null;
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$this->column_names = array();
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$this->num_rows = null;
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$this->return_value = null;
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$this->extracted_variables = array();
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$this->error_messages = array();
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$this->is_error = false;
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$this->queries = array();
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$this->param_num = 0;
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}
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private function prepare_engine($query_type = null) {
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if (stripos($query_type, 'create') !== false) {
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require_once PDODIR . 'query_create.class.php';
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$engine = new CreateQuery();
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} elseif (stripos($query_type, 'alter') !== false) {
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require_once PDODIR . 'query_alter.class.php';
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$engine = new AlterQuery();
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} else {
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require_once PDODIR . 'query.class.php';
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$engine = new PDOSQLiteDriver();
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}
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return $engine;
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}
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private function prepare_query(){
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$this->queries[] = "Prepare:\t". $this->prepared_query;
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$reason = 0;
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$message = '';
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$statement = null;
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do {
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try {
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$statement = $this->pdo->prepare($this->prepared_query);
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} catch (PDOException $err) {
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$reason = $err->getCode();
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$message = $err->getMessage();
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}
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} while (5 == $reason || 6 == $reason);
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if ($reason > 0){
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$err_message = sprintf(__("Problem preparing the PDO SQL Statement. Error was: %s", 'sqlite-integration'), $message);
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$this->set_error(__LINE__, __FUNCTION__, $err_message);
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}
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return $statement;
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}
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private function execute_query($statement) {
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$reason = 0;
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$message = '';
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if (!is_object($statement))
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return;
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if (count($this->extracted_variables) > 0) {
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$this->queries[] = "Executing: ". var_export($this->extracted_variables, true);
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do {
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if ($this->query_type == 'update' || $this->query_type == 'replace') {
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try {
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$this->beginTransaction();
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$statement->execute($this->extracted_variables);
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$this->commit();
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} catch (PDOException $err) {
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$reason = $err->getCode();
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$message = $err->getMessage();
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$this->rollBack();
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}
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} else {
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try {
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$statement->execute($this->extracted_variables);
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} catch (PDOException $err) {
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$reason = $err->getCode();
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$message = $err->getMessage();
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}
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}
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} while (5 == $reason || 6 == $reason);
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} else {
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$this->queries[] = "Executing: (no parameters)\t ";
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do{
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if ($this->query_type == 'update' || $this->query_type == 'replace') {
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try {
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$this->beginTransaction();
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$statement->execute();
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$this->commit();
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} catch (PDOException $err) {
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$reason = $err->getCode();
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$message = $err->getMessage();
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$this->rollBack();
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}
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} else {
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try {
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$statement->execute();
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} catch (PDOException $err) {
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$reason = $err->getCode();
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$message = $err->getMessage();
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}
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}
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} while (5 == $reason || 6 == $reason);
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}
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if ($reason > 0) {
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$err_message = sprintf(__("Error while executing query! Error message was: %s", 'sqlite-integration'), $message);
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$this->set_error(__LINE__, __FUNCTION__, $err_message);
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return false;
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} else {
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$this->_results = $statement->fetchAll(PDO::FETCH_OBJ);
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}
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//generate the results that $wpdb will want to see
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switch ($this->query_type) {
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case "insert":
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case "update":
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case "replace":
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$this->last_insert_id = $this->pdo->lastInsertId();
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$this->affected_rows = $statement->rowCount();
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$this->return_value = $this->affected_rows;
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break;
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case "select":
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case "show":
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case "showcolumns":
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case "showindex":
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case "describe":
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case "desc":
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// case "foundrows":
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$this->num_rows = count($this->_results);
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$this->return_value = $this->num_rows;
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break;
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case "delete":
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$this->affected_rows = $statement->rowCount();
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$this->return_value = $this->affected_rows;
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break;
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case "alter":
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case "drop":
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case "create":
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case "optimize":
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case "truncate":
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if ($this->is_error) {
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$this->return_value = false;
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} else {
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$this->return_value = true;
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}
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break;
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}
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}
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private function extract_variables() {
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if ($this->query_type == 'create') {
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$this->prepared_query = $this->rewritten_query;
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return;
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}
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//long queries can really kill this
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$pattern = '/(?<!\\\\)([\'"])(.*?)(?<!\\\\)\\1/imsx';
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$_limit = $limit = ini_get('pcre.backtrack_limit');
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do {
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if ($limit > 10000000) {
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$message = __("The query is too big to parse properly", 'sqlite-integration');
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$this->set_error(__LINE__, __FUNCTION__, $message);
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break; //no point in continuing execution, would get into a loop
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} else {
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ini_set('pcre.backtrack_limit', $limit);
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$query = preg_replace_callback($pattern, array($this,'replace_variables_with_placeholders'), $this->rewritten_query);
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}
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$limit = $limit * 10;
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} while (empty($query));
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//reset the pcre.backtrack_limist
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ini_set('pcre.backtrack_limit', $_limit);
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$this->queries[]= "With Placeholders: $query ";
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$this->prepared_query = $query;
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}
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private function replace_variables_with_placeholders($matches) {
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//remove the wordpress escaping mechanism
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$param = stripslashes($matches[0]);
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//remove trailing spaces
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$param = trim($param);
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//remove the quotes at the end and the beginning
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if (in_array($param{strlen($param)-1}, array("'",'"'))) {
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$param = substr($param,0,-1) ;//end
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}
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if (in_array($param{0}, array("'",'"'))) {
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$param = substr($param, 1); //start
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}
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//$this->extracted_variables[] = $param;
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$key = ':param_'.$this->param_num++;
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$this->extracted_variables[] = $param;
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//return the placeholder
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//return ' ? ';
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return ' '.$key.' ';
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}
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/**
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* takes the query string ,determines the type and returns the type string
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* if the query is the type PDO for Wordpress can't executes, returns false
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* @param string $query
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* @return boolean|string
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*/
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private function determine_query_type($query) {
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$result = preg_match('/^\\s*(EXPLAIN|PRAGMA|SELECT\\s*FOUND_ROWS|SELECT|INSERT|UPDATE|REPLACE|DELETE|ALTER|CREATE|DROP\\s*INDEX|DROP|SHOW\\s*\\w+\\s*\\w+\\s*|DESCRIBE|DESC|TRUNCATE|OPTIMIZE)/i', $query, $match);
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if (!$result) {
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return false;
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}
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$this->query_type = strtolower($match[1]);
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if (stripos($this->query_type, 'found') !== false) {
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$this->query_type = 'foundrows';
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}
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if (stripos($this->query_type, 'show') !== false) {
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if (stripos($this->query_type, 'show tables') !== false) {
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$this->query_type = 'show';
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} elseif (stripos($this->query_type, 'show columns') !== false || stripos($this->query_type, 'show fields') !== false) {
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$this->query_type = 'showcolumns';
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} elseif (stripos($this->query_type, 'show index') !== false || stripos($this->query_type, 'show indexes') !== false || stripos($this->query_type, 'show keys') !== false) {
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$this->query_type = 'showindex';
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} elseif (stripos($this->query_type, 'show variables') !== false || stripos($this->query_type, 'show global variables') !== false || stripos($this->query_type, 'show session variables') !== false) {
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$this->query_type = 'show_variables';
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} else {
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return false;
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}
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}
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if (stripos($this->query_type, 'drop index') !== false) {
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$this->query_type = 'drop_index';
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}
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return true;
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}
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/**
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* SQLite version 3.7.11 began support multiple rows insert with values
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* clause. This is for that version or later.
|
|
* @param string $query
|
|
*/
|
|
private function execute_insert_query_new($query) {
|
|
$engine = $this->prepare_engine($this->query_type);
|
|
$this->rewritten_query = $engine->rewrite_query($query, $this->query_type);
|
|
$this->queries[] = "Rewritten: $this->rewritten_query";
|
|
$this->extract_variables();
|
|
$statement = $this->prepare_query();
|
|
$this->execute_query($statement);
|
|
}
|
|
/**
|
|
* executes the INSERT query for SQLite version 3.7.10 or lesser
|
|
* @param string $query
|
|
*/
|
|
private function execute_insert_query($query) {
|
|
global $wpdb;
|
|
$multi_insert = false;
|
|
$statement = null;
|
|
$engine = $this->prepare_engine($this->query_type);
|
|
if (preg_match('/(INSERT.*?VALUES\\s*)(\(.*\))/imsx', $query, $matched)) {
|
|
$query_prefix = $matched[1];
|
|
$values_data = $matched[2];
|
|
if (stripos($values_data, 'ON DUPLICATE KEY') !== false) {
|
|
$exploded_parts = $values_data;
|
|
} elseif (stripos($query_prefix, "INSERT INTO $wpdb->comments") !== false) {
|
|
$exploded_parts = $values_data;
|
|
} else {
|
|
$exploded_parts = $this->parse_multiple_inserts($values_data);
|
|
}
|
|
$count = count($exploded_parts);
|
|
if ($count > 1) {
|
|
$multi_insert = true;
|
|
}
|
|
}
|
|
if ($multi_insert) {
|
|
$first = true;
|
|
foreach ($exploded_parts as $value) {
|
|
if (substr($value, -1, 1) === ')') {
|
|
$suffix = '';
|
|
} else {
|
|
$suffix = ')';
|
|
}
|
|
$query_string = $query_prefix . ' ' . $value . $suffix;
|
|
$this->rewritten_query = $engine->rewrite_query($query_string, $this->query_type);
|
|
$this->queries[] = "Rewritten: $this->rewritten_query";
|
|
$this->extracted_variables = array();
|
|
$this->extract_variables();
|
|
if ($first) {
|
|
$statement = $this->prepare_query();
|
|
$this->execute_query($statement);
|
|
$first = false;
|
|
} else {
|
|
$this->execute_query($statement);
|
|
}
|
|
}
|
|
} else {
|
|
$this->rewritten_query = $engine->rewrite_query($query, $this->query_type);
|
|
$this->queries[] = "Rewritten: $this->rewritten_query";
|
|
$this->extract_variables();
|
|
$statement = $this->prepare_query();
|
|
$this->execute_query($statement);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* helper function for execute_insert_query()
|
|
* @param string $values
|
|
* @return array
|
|
*/
|
|
private function parse_multiple_inserts($values) {
|
|
$tokens = preg_split("/(''|(?<!\\\\)'|(?<!\()\),(?=\s*\())/s", $values, -1, PREG_SPLIT_DELIM_CAPTURE);
|
|
$exploded_parts = array();
|
|
$part = '';
|
|
$literal = false;
|
|
foreach ($tokens as $token) {
|
|
switch ($token) {
|
|
case "),":
|
|
if (!$literal) {
|
|
$exploded_parts[] = $part;
|
|
$part = '';
|
|
} else {
|
|
$part .= $token;
|
|
}
|
|
break;
|
|
case "'":
|
|
if ($literal) {
|
|
$literal = false;
|
|
} else {
|
|
$literal = true;
|
|
}
|
|
$part .= $token;
|
|
break;
|
|
default:
|
|
$part .= $token;
|
|
break;
|
|
}
|
|
}
|
|
if (!empty($part)) {
|
|
$exploded_parts[] = $part;
|
|
}
|
|
return $exploded_parts;
|
|
}
|
|
|
|
/**
|
|
* function to execute CREATE query
|
|
* @param string
|
|
* @return boolean
|
|
*/
|
|
private function execute_create_query($query) {
|
|
$engine = $this->prepare_engine($this->query_type);
|
|
$rewritten_query = $engine->rewrite_query($query);
|
|
$reason = 0;
|
|
$message = '';
|
|
// $queries = explode(";", $this->rewritten_query);
|
|
try {
|
|
$this->beginTransaction();
|
|
foreach ($rewritten_query as $single_query) {
|
|
$this->queries[] = "Executing:\t" . $single_query;
|
|
$single_query = trim($single_query);
|
|
if (empty($single_query)) continue;
|
|
$this->pdo->exec($single_query);
|
|
}
|
|
$this->commit();
|
|
} catch (PDOException $err) {
|
|
$reason = $err->getCode();
|
|
$message = $err->getMessage();
|
|
if (5 == $reason || 6 == $reason) {
|
|
$this->commit();
|
|
} else {
|
|
$this->rollBack();
|
|
}
|
|
}
|
|
if ($reason > 0) {
|
|
$err_message = sprintf(__("Problem in creating table or index. Error was: %s", 'sqlite-integration'), $message);
|
|
$this->set_error(__LINE__, __FUNCTION__, $err_message);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* function to execute ALTER TABLE query
|
|
* @param string
|
|
* @return boolean
|
|
*/
|
|
private function execute_alter_query($query) {
|
|
$engine = $this->prepare_engine($this->query_type);
|
|
$reason = 0;
|
|
$message = '';
|
|
$rewritten_query = $engine->rewrite_query($query, $this->query_type);
|
|
try {
|
|
$this->beginTransaction();
|
|
if (is_array($rewritten_query)) {
|
|
foreach ($rewritten_query as $single_query) {
|
|
$this->queries[] = "Executing:\t" . $single_query;
|
|
$single_query = trim($single_query);
|
|
if (empty($single_query)) continue;
|
|
$this->pdo->exec($single_query);
|
|
}
|
|
} else {
|
|
$this->queries[] = "Executing:\t" . $rewritten_query;
|
|
$rewritten_query = trim($rewritten_query);
|
|
$this->pdo->exec($rewritten_query);
|
|
}
|
|
$this->commit();
|
|
} catch (PDOException $err) {
|
|
$reason = $err->getCode();
|
|
$message = $err->getMessage();
|
|
if (5 == $reason || 6 == $reason) {
|
|
$this->commit();
|
|
usleep(10000);
|
|
} else {
|
|
$this->rollBack();
|
|
}
|
|
}
|
|
if ($reason > 0) {
|
|
$err_message = sprintf(__("Problem in executing alter query. Error was: %s", 'sqlite-integration'), $message);
|
|
$this->set_error(__LINE__, __FUNCTION__, $err_message);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* function to execute SHOW VARIABLES query
|
|
*
|
|
* This query is meaningless for SQLite. This function returns null data and
|
|
* avoid the error message.
|
|
*
|
|
* @param string
|
|
* @return ObjectArray
|
|
*/
|
|
private function show_variables_workaround($query) {
|
|
$dummy_data = array('Variable_name' => '', 'Value' => null);
|
|
$pattern = '/SHOW\\s*VARIABLES\\s*LIKE\\s*(.*)?$/im';
|
|
if (preg_match($pattern, $query, $match)) {
|
|
$value = str_replace("'", '', $match[1]);
|
|
$dummy_data['Variable_name'] = trim($value);
|
|
// this is set for Wordfence Security Plugin
|
|
if ($value == 'max_allowed_packet') $dummy_data['Value'] = 1047552;
|
|
}
|
|
$_results[] = new ObjectArray($dummy_data);
|
|
$this->results = $_results;
|
|
$this->num_rows = count($this->results);
|
|
$this->return_value = $this->num_rows;
|
|
return true;
|
|
}
|
|
|
|
private function process_results($engine) {
|
|
if (in_array($this->query_type, array('describe', 'desc', 'showcolumns'))) {
|
|
$this->convert_to_columns_object();
|
|
} elseif ('showindex' === $this->query_type){
|
|
$this->convert_to_index_object();
|
|
} else {
|
|
$this->results = $this->_results;
|
|
}
|
|
}
|
|
|
|
private function set_error ($line, $function, $message){
|
|
global $wpdb;
|
|
$this->errors[] = array("line"=>$line, "function"=>$function);
|
|
$this->error_messages[] = $message;
|
|
$this->is_error = true;
|
|
if ($wpdb->suppress_errors) return false;
|
|
if (!$wpdb->show_errors) return false;
|
|
file_put_contents (FQDBDIR .'debug.txt', "Line $line, Function: $function, Message: $message \n", FILE_APPEND);
|
|
}
|
|
|
|
/**
|
|
* method that takes the associative array of query results and creates a numeric array of anonymous objects
|
|
*/
|
|
private function convert_to_object(){
|
|
$_results = array();
|
|
if (count ($this->results) === 0){
|
|
echo $this->get_error_message();
|
|
} else {
|
|
foreach($this->results as $row){
|
|
$_results[] = new ObjectArray($row);
|
|
}
|
|
}
|
|
$this->results = $_results;
|
|
}
|
|
|
|
/**
|
|
* method to rewrite pragma results to mysql compatible array
|
|
* when query_type is describe, we use sqlite pragma function.
|
|
* see pdo_sqlite_driver.php
|
|
*/
|
|
private function convert_to_columns_object() {
|
|
$_results = array();
|
|
$_columns = array( //Field names MySQL SHOW COLUMNS returns
|
|
'Field' => "",
|
|
'Type' => "",
|
|
'Null' => "",
|
|
'Key' => "",
|
|
'Default' => "",
|
|
'Extra' => ""
|
|
);
|
|
if (count($this->_results) === 0) {
|
|
echo $this->get_error_message();
|
|
} else {
|
|
foreach ($this->_results as $row) {
|
|
$_columns['Field'] = $row->name;
|
|
$_columns['Type'] = $row->type;
|
|
$_columns['Null'] = $row->notnull ? "NO" : "YES";
|
|
$_columns['Key'] = $row->pk ? "PRI" : "";
|
|
$_columns['Default'] = $row->dflt_value;
|
|
$_results[] = new ObjectArray($_columns);
|
|
}
|
|
}
|
|
$this->results = $_results;
|
|
}
|
|
/**
|
|
* rewrites the result of SHOW INDEX to the Object compatible with MySQL
|
|
* added the WHERE clause manipulation (ver 1.3.1)
|
|
*/
|
|
private function convert_to_index_object() {
|
|
$_results = array();
|
|
$_columns = array(
|
|
'Table' => "",
|
|
'Non_unique' => "",// unique -> 0, not unique -> 1
|
|
'Key_name' => "",// the name of the index
|
|
'Seq_in_index' => "",// column sequence number in the index. begins at 1
|
|
'Column_name' => "",
|
|
'Collation' => "",//A(scend) or NULL
|
|
'Cardinality' => "",
|
|
'Sub_part' => "",// set to NULL
|
|
'Packed' => "",// How to pack key or else NULL
|
|
'Null' => "",// If column contains null, YES. If not, NO.
|
|
'Index_type' => "",// BTREE, FULLTEXT, HASH, RTREE
|
|
'Comment' => ""
|
|
);
|
|
if (count($this->_results) == 0) {
|
|
echo $this->get_error_message();
|
|
} else {
|
|
foreach ($this->_results as $row) {
|
|
if ($row->type == 'table' && !stripos($row->sql, 'primary'))
|
|
continue;
|
|
if ($row->type == 'index' && stripos($row->name, 'sqlite_autoindex') !== false)
|
|
continue;
|
|
switch ($row->type) {
|
|
case 'table':
|
|
$pattern1 = '/^\\s*PRIMARY.*\((.*)\)/im';
|
|
$pattern2 = '/^\\s*(\\w+)?\\s*.*PRIMARY.*(?!\()/im';
|
|
if (preg_match($pattern1, $row->sql, $match)) {
|
|
$col_name = trim($match[1]);
|
|
$_columns['Key_name'] = 'PRIMARY';
|
|
$_columns['Non_unique'] = 0;
|
|
$_columns['Column_name'] = $col_name;
|
|
} elseif (preg_match($pattern2, $row->sql, $match)) {
|
|
$col_name = trim($match[1]);
|
|
$_columns['Key_name'] = 'PRIMARY';
|
|
$_columns['Non_unique'] = 0;
|
|
$_columns['Column_name'] = $col_name;
|
|
}
|
|
break;
|
|
case 'index':
|
|
if (stripos($row->sql, 'unique') !== false) {
|
|
$_columns['Non_unique'] = 0;
|
|
} else {
|
|
$_columns['Non_unique'] = 1;
|
|
}
|
|
if (preg_match('/^.*\((.*)\)/i', $row->sql, $match)) {
|
|
$col_name = str_replace("'", '', $match[1]);
|
|
$_columns['Column_name'] = trim($col_name);
|
|
}
|
|
$_columns['Key_name'] = $row->name;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
$_columns['Table'] = $row->tbl_name;
|
|
$_columns['Collation'] = NULL;
|
|
$_columns['Cardinality'] = 0;
|
|
$_columns['Sub_part'] = NULL;
|
|
$_columns['Packed'] = NULL;
|
|
$_columns['Null'] = 'NO';
|
|
$_columns['Index_type'] = 'BTREE';
|
|
$_columns['Comment'] = '';
|
|
$_results[] = new ObjectArray($_columns);
|
|
}
|
|
if (stripos($this->queries[0], 'WHERE') !== false) {
|
|
preg_match('/WHERE\\s*(.*)$/im', $this->queries[0], $match);
|
|
list($key, $value) = explode('=', $match[1]);
|
|
$key = trim($key);
|
|
$value = preg_replace("/[\';]/", '', $value);
|
|
$value = trim($value);
|
|
foreach ($_results as $result) {
|
|
if (stripos($value, $result->$key) !== false) {
|
|
unset($_results);
|
|
$_results[] = $result;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
$this->results = $_results;
|
|
}
|
|
|
|
/**
|
|
* function to get SQLite library version
|
|
* this is used for checking if SQLite can execute multiple rows insert
|
|
* @return version number string or 0
|
|
*/
|
|
private function get_sqlite_version() {
|
|
try {
|
|
$statement = $this->pdo->prepare('SELECT sqlite_version()');
|
|
$statement->execute();
|
|
$result = $statement->fetch(PDO::FETCH_NUM);
|
|
return $result[0];
|
|
} catch (PDOException $err) {
|
|
return '0';
|
|
}
|
|
}
|
|
/**
|
|
* function call to PDO::beginTransaction()
|
|
* @see PDO::beginTransaction()
|
|
*/
|
|
public function beginTransaction() {
|
|
if ($this->has_active_transaction) {
|
|
return false;
|
|
} else {
|
|
$this->has_active_transaction = $this->pdo->beginTransaction();
|
|
return $this->has_active_transaction;
|
|
}
|
|
}
|
|
/**
|
|
* function call to PDO::commit()
|
|
* @see PDO::commit()
|
|
*/
|
|
public function commit() {
|
|
$this->pdo->commit();
|
|
$this->has_active_transaction = false;
|
|
}
|
|
/**
|
|
* function call to PDO::rollBack()
|
|
* @see PDO::rollBack()
|
|
*/
|
|
public function rollBack() {
|
|
$this->pdo->rollBack();
|
|
$this->has_active_transaction = false;
|
|
}
|
|
}
|
|
|
|
class ObjectArray {
|
|
function __construct($data = null,&$node= null) {
|
|
foreach ($data as $key => $value) {
|
|
if ( is_array($value) ) {
|
|
if (!$node) {
|
|
$node =& $this;
|
|
}
|
|
$node->$key = new stdClass();
|
|
self::__construct($value,$node->$key);
|
|
} else {
|
|
if (!$node) {
|
|
$node =& $this;
|
|
}
|
|
$node->$key = $value;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
?>
|