sqlite-integration/schema.php

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<?php
/**
* This file defines the make_db_sqlite() function.
*
* @package SQLite Integration
* @author Kojima Toshiyasu
*/
if (!defined('ABSPATH')) {
echo 'Thank you, but you are not allowed to access this file.';
die();
}
/**
* Function to create tables according to the schemas of WordPress.
*
* This is executed only once while installation.
* @return boolean
*/
function make_db_sqlite() {
include_once PDODIR . 'query_create.class.php';
include_once ABSPATH . 'wp-admin/includes/schema.php';
$index_array = array();
// ob_end_clean();
$table_schemas = wp_get_db_schema();
$queries = explode (";", $table_schemas);
$query_parser = new CreateQuery();
try {
$pdo = new PDO('sqlite:'.FQDB, null, null, array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));
} catch (PDOException $err) {
$err_data = $err->errorInfo;
$message = 'Database connection error!<br />';
$message .= sprintf("Error message is: %s", $err_data[2]);
echo $message;
return false;
}
try {
$pdo->beginTransaction();
foreach ($queries as $query) {
$query = trim($query);
if (empty($query))
continue;
$rewritten_query = $query_parser->rewrite_query($query);
if (is_array($rewritten_query)) {
$table_query = array_shift($rewritten_query);
$index_queries = $rewritten_query;
$table_query = trim($table_query);
$pdo->exec($table_query);
// foreach($rewritten_query as $single_query) {
// $single_query = trim($single_query);
// $pdo->exec($single_query);
// }
} else {
$rewritten_query = trim($rewritten_query);
$pdo->exec($rewritten_query);
}
}
$pdo->commit();
if ($index_queries) {
// $query_parser rewrites KEY to INDEX, so we don't need KEY pattern
$pattern = '/CREATE\\s*(UNIQUE\\s*INDEX|INDEX)\\s*IF\\s*NOT\\s*EXISTS\\s*(\\w+)?\\s*.*/im';
$pdo->beginTransaction();
foreach ($index_queries as $index_query) {
preg_match($pattern, $index_query, $match);
$index_name = trim($match[2]);
if (in_array($index_name, $index_array)) {
$r = rand(0, 50);
$replacement = $index_name . "_$r";
$index_query = str_ireplace('EXISTS '.$index_name, 'EXISTS '.$replacement, $index_query);
} else {
$index_array[] = $index_name;
}
$pdo->exec($index_query);
}
$pdo->commit();
}
} catch (PDOException $err) {
$err_data = $err->errorInfo;
$err_code = $err_data[1];
if (5 == $err_code || 6 == $err_code) {
// if the database is locked, commit again
$pdo->commit();
} else {
$pdo->rollBack();
$message = sprintf("Error occured while creating tables or indexes...<br />Query was: %s<br />", var_export($rewritten_query, true));
$message .= sprintf("Error message is: %s", $err_data[2]);
echo $message;
return false;
}
}
$query_parser = null;
$pdo = null;
return true;
}
?>