688 lines
24 KiB
PHP
688 lines
24 KiB
PHP
<?php
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/**
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* Tracking changes on databases, tables and views
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*/
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declare(strict_types=1);
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namespace PhpMyAdmin\Tracking;
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use PhpMyAdmin\Cache;
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use PhpMyAdmin\ConfigStorage\Features\TrackingFeature;
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use PhpMyAdmin\ConfigStorage\Relation;
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use PhpMyAdmin\DatabaseInterface;
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use PhpMyAdmin\Dbal\Connection;
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use PhpMyAdmin\Plugins;
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use PhpMyAdmin\Plugins\Export\ExportSql;
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use PhpMyAdmin\SqlParser\Parser;
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use PhpMyAdmin\SqlParser\Statements\AlterStatement;
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use PhpMyAdmin\SqlParser\Statements\CreateStatement;
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use PhpMyAdmin\SqlParser\Statements\DeleteStatement;
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use PhpMyAdmin\SqlParser\Statements\DropStatement;
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use PhpMyAdmin\SqlParser\Statements\InsertStatement;
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use PhpMyAdmin\SqlParser\Statements\RenameStatement;
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use PhpMyAdmin\SqlParser\Statements\TruncateStatement;
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use PhpMyAdmin\SqlParser\Statements\UpdateStatement;
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use PhpMyAdmin\Util;
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use function array_values;
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use function count;
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use function intval;
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use function mb_strstr;
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use function preg_quote;
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use function preg_replace;
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use function serialize;
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use function sprintf;
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use function substr;
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use function trim;
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/**
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* This class tracks changes on databases, tables and views.
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*
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* @todo use stristr instead of strstr
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*/
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class Tracker
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{
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public const TRACKER_ENABLED_CACHE_KEY = 'phpmyadmin.tracker.enabled';
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/**
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* Cache to avoid quering tracking status multiple times.
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*
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* @var mixed[]
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*/
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protected static array $trackingCache = [];
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/**
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* Actually enables tracking. This needs to be done after all
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* underlaying code is initialized.
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*/
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public static function enable(): void
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{
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Cache::set(self::TRACKER_ENABLED_CACHE_KEY, true);
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}
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/**
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* Gets the on/off value of the Tracker module, starts initialization.
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*/
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public static function isActive(): bool
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{
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$trackingEnabled = Cache::get(self::TRACKER_ENABLED_CACHE_KEY, false);
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if (! $trackingEnabled) {
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return false;
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}
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/**
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* We need to avoid attempt to track any queries from {@link Relation::getRelationParameters()}
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*/
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Cache::set(self::TRACKER_ENABLED_CACHE_KEY, false);
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$relation = new Relation($GLOBALS['dbi']);
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$relationParameters = $relation->getRelationParameters();
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/* Restore original state */
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Cache::set(self::TRACKER_ENABLED_CACHE_KEY, true);
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return $relationParameters->trackingFeature !== null;
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}
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/**
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* Gets the tracking status of a table, is it active or disabled ?
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*
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* @param string $dbName name of database
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* @param string $tableName name of table
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*/
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public static function isTracked(string $dbName, string $tableName): bool
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{
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$trackingEnabled = Cache::get(self::TRACKER_ENABLED_CACHE_KEY, false);
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if (! $trackingEnabled) {
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return false;
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}
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if (isset(self::$trackingCache[$dbName][$tableName])) {
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return self::$trackingCache[$dbName][$tableName];
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}
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/**
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* We need to avoid attempt to track any queries from {@link Relation::getRelationParameters()}
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*/
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Cache::set(self::TRACKER_ENABLED_CACHE_KEY, false);
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$relation = new Relation($GLOBALS['dbi']);
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$trackingFeature = $relation->getRelationParameters()->trackingFeature;
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/* Restore original state */
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Cache::set(self::TRACKER_ENABLED_CACHE_KEY, true);
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if ($trackingFeature === null) {
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return false;
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}
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$sqlQuery = sprintf(
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'SELECT tracking_active FROM %s.%s WHERE db_name = %s AND table_name = %s'
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. ' ORDER BY version DESC LIMIT 1',
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Util::backquote($trackingFeature->database),
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Util::backquote($trackingFeature->tracking),
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$GLOBALS['dbi']->quoteString($dbName, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($tableName, Connection::TYPE_CONTROL),
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);
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$result = $GLOBALS['dbi']->fetchValue($sqlQuery, 0, Connection::TYPE_CONTROL) == 1;
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self::$trackingCache[$dbName][$tableName] = $result;
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return $result;
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}
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/**
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* Returns the comment line for the log.
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*
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* @return string Comment, contains date and username
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*/
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public static function getLogComment(): string
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{
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$date = Util::date('Y-m-d H:i:s');
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$user = preg_replace('/\s+/', ' ', $GLOBALS['cfg']['Server']['user']);
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return '# log ' . $date . ' ' . $user . "\n";
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}
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/**
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* Creates tracking version of a table / view
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* (in other words: create a job to track future changes on the table).
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*
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* @param string $dbName name of database
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* @param string $tableName name of table
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* @param string $version version
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* @param string $trackingSet set of tracking statements
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* @param bool $isView if table is a view
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*/
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public static function createVersion(
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string $dbName,
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string $tableName,
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string $version,
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string $trackingSet = '',
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bool $isView = false,
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): bool {
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$GLOBALS['export_type'] ??= null;
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$relation = new Relation($GLOBALS['dbi']);
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if ($trackingSet == '') {
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$trackingSet = $GLOBALS['cfg']['Server']['tracking_default_statements'];
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}
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$exportSqlPlugin = Plugins::getPlugin('export', 'sql', [
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'export_type' => (string) $GLOBALS['export_type'],
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'single_table' => false,
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]);
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if (! $exportSqlPlugin instanceof ExportSql) {
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return false;
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}
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$exportSqlPlugin->useSqlBackquotes(true);
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$date = Util::date('Y-m-d H:i:s');
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// Get data definition snapshot of table
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$columns = $GLOBALS['dbi']->getColumns($dbName, $tableName, true);
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// int indices to reduce size
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$columns = array_values($columns);
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// remove Privileges to reduce size
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/** @infection-ignore-all */
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for ($i = 0, $nb = count($columns); $i < $nb; $i++) {
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unset($columns[$i]['Privileges']);
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}
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$indexes = $GLOBALS['dbi']->getTableIndexes($dbName, $tableName);
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$snapshot = ['COLUMNS' => $columns, 'INDEXES' => $indexes];
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$snapshot = serialize($snapshot);
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// Get DROP TABLE / DROP VIEW and CREATE TABLE SQL statements
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$createSql = '';
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if ($GLOBALS['cfg']['Server']['tracking_add_drop_table'] == true && ! $isView) {
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$createSql .= self::getLogComment()
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. 'DROP TABLE IF EXISTS ' . Util::backquote($tableName) . ";\n";
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}
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if ($GLOBALS['cfg']['Server']['tracking_add_drop_view'] == true && $isView) {
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$createSql .= self::getLogComment()
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. 'DROP VIEW IF EXISTS ' . Util::backquote($tableName) . ";\n";
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}
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$createSql .= self::getLogComment() . $exportSqlPlugin->getTableDef($dbName, $tableName);
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// Save version
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$trackingFeature = $relation->getRelationParameters()->trackingFeature;
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if ($trackingFeature === null) {
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return false;
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}
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$sqlQuery = sprintf(
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'/*NOTRACK*/' . "\n" . 'INSERT INTO %s.%s (db_name, table_name, version,'
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. ' date_created, date_updated, schema_snapshot, schema_sql, data_sql, tracking)'
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. ' values (%s, %s, %s, %s, %s, %s, %s, %s, %s)',
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Util::backquote($trackingFeature->database),
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Util::backquote($trackingFeature->tracking),
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$GLOBALS['dbi']->quoteString($dbName, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($tableName, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($version, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($date, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($date, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($snapshot, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($createSql, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString("\n", Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($trackingSet, Connection::TYPE_CONTROL),
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);
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$GLOBALS['dbi']->queryAsControlUser($sqlQuery);
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// Deactivate previous version
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return self::deactivateTracking($dbName, $tableName, (string) ((int) $version - 1));
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}
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/**
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* Creates tracking version of a database
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* (in other words: create a job to track future changes on the database).
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*
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* @param string $dbName name of database
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* @param string $version version
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* @param string $query query
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* @param string $trackingSet set of tracking statements
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*/
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public static function createDatabaseVersion(
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string $dbName,
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string $version,
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string $query,
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string $trackingSet = 'CREATE DATABASE,ALTER DATABASE,DROP DATABASE',
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): bool {
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$relation = new Relation($GLOBALS['dbi']);
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$date = Util::date('Y-m-d H:i:s');
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if ($trackingSet == '') {
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$trackingSet = $GLOBALS['cfg']['Server']['tracking_default_statements'];
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}
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$createSql = '';
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if ($GLOBALS['cfg']['Server']['tracking_add_drop_database'] == true) {
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$createSql .= self::getLogComment() . 'DROP DATABASE IF EXISTS ' . Util::backquote($dbName) . ";\n";
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}
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$createSql .= self::getLogComment() . $query;
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$trackingFeature = $relation->getRelationParameters()->trackingFeature;
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if ($trackingFeature === null) {
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return false;
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}
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// Save version
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$sqlQuery = sprintf(
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'/*NOTRACK*/' . "\n" . 'INSERT INTO %s.%s (db_name, table_name, version,'
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. ' date_created, date_updated, schema_snapshot, schema_sql, data_sql, tracking)'
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. ' values (%s, %s, %s, %s, %s, %s, %s, %s, %s)',
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Util::backquote($trackingFeature->database),
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Util::backquote($trackingFeature->tracking),
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$GLOBALS['dbi']->quoteString($dbName, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString('', Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($version, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($date, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($date, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString('', Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($createSql, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString("\n", Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($trackingSet, Connection::TYPE_CONTROL),
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);
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return (bool) $GLOBALS['dbi']->queryAsControlUser($sqlQuery);
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}
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/**
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* Changes tracking of a table.
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*
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* @param string $dbName name of database
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* @param string $tableName name of table
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* @param string $version version
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* @param int $newState the new state of tracking
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*/
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private static function changeTracking(
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string $dbName,
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string $tableName,
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string $version,
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int $newState,
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): bool {
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$relation = new Relation($GLOBALS['dbi']);
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$trackingFeature = $relation->getRelationParameters()->trackingFeature;
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if ($trackingFeature === null) {
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return false;
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}
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$sqlQuery = sprintf(
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'UPDATE %s.%s SET `tracking_active` = %d'
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. ' WHERE `db_name` = %s AND `table_name` = %s AND `version` = %s',
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Util::backquote($trackingFeature->database),
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Util::backquote($trackingFeature->tracking),
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$newState,
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$GLOBALS['dbi']->quoteString($dbName, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($tableName, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($version, Connection::TYPE_CONTROL),
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);
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return (bool) $GLOBALS['dbi']->queryAsControlUser($sqlQuery);
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}
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/**
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* Activates tracking of a table.
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*
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* @param string $dbname name of database
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* @param string $tablename name of table
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* @param string $version version
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*/
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public static function activateTracking(string $dbname, string $tablename, string $version): bool
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{
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return self::changeTracking($dbname, $tablename, $version, 1);
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}
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/**
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* Deactivates tracking of a table.
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*
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* @param string $dbname name of database
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* @param string $tablename name of table
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* @param string $version version
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*/
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public static function deactivateTracking(string $dbname, string $tablename, string $version): bool
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{
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return self::changeTracking($dbname, $tablename, $version, 0);
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}
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/**
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* Gets the newest version of a tracking job
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* (in other words: gets the HEAD version).
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*
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* @param string $dbname name of database
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* @param string $tablename name of table
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* @param string $statement tracked statement
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*
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* @return int (-1 if no version exists | > 0 if a version exists)
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*/
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private static function getVersion(string $dbname, string $tablename, string|null $statement = null): int
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{
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$relation = new Relation($GLOBALS['dbi']);
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$trackingFeature = $relation->getRelationParameters()->trackingFeature;
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if ($trackingFeature === null) {
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return -1;
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}
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$sqlQuery = sprintf(
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'SELECT MAX(version) FROM %s.%s WHERE `db_name` = %s AND `table_name` = %s',
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Util::backquote($trackingFeature->database),
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Util::backquote($trackingFeature->tracking),
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$GLOBALS['dbi']->quoteString($dbname, Connection::TYPE_CONTROL),
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$GLOBALS['dbi']->quoteString($tablename, Connection::TYPE_CONTROL),
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);
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if ($statement != '') {
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$sqlQuery .= " AND FIND_IN_SET('" . $statement . "',tracking) > 0";
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}
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$result = $GLOBALS['dbi']->tryQueryAsControlUser($sqlQuery);
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if ($result === false) {
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return -1;
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}
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$row = $result->fetchRow();
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return intval($row[0] ?? -1);
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}
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/**
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* Parses a query. Gets
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* - statement identifier (UPDATE, ALTER TABLE, ...)
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* - type of statement, is it part of DDL or DML ?
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* - tablename
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*
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* @param string $query query
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*
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* @return mixed[] containing identifier, type and tablename.
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*
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* @todo: using PMA SQL Parser when possible
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* @todo: support multi-table/view drops
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*/
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public static function parseQuery(string $query): array
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{
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// Usage of PMA_SQP does not work here
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//
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// require_once("libraries/sqlparser.lib.php");
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// $parsed_sql = PMA_SQP_parse($query);
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// $sql_info = PMA_SQP_analyze($parsed_sql);
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$parser = new Parser($query);
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$tokens = $parser->list->tokens;
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// Parse USE statement, need it for SQL dump imports
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if ($tokens[0]->value === 'USE') {
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$GLOBALS['db'] = $tokens[2]->value;
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}
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$result = [];
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if ($parser->statements !== []) {
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$statement = $parser->statements[0];
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$options = $statement->options?->options;
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// DDL statements
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$result['type'] = 'DDL';
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// Parse CREATE statement
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if ($statement instanceof CreateStatement) {
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if ($options === null || $options === [] || ! isset($options[6])) {
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return $result;
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}
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if ($options[6] === 'VIEW' || $options[6] === 'TABLE') {
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$result['identifier'] = 'CREATE ' . $options[6];
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$result['tablename'] = $statement->name?->table;
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} elseif ($options[6] === 'DATABASE') {
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$result['identifier'] = 'CREATE DATABASE';
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$result['tablename'] = '';
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// In case of CREATE DATABASE, database field of the CreateStatement is the name of the database
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$GLOBALS['db'] = $statement->name?->database;
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} elseif (
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$options[6] === 'INDEX'
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|| $options[6] === 'UNIQUE INDEX'
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|| $options[6] === 'FULLTEXT INDEX'
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|| $options[6] === 'SPATIAL INDEX'
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) {
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$result['identifier'] = 'CREATE INDEX';
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// In case of CREATE INDEX, we have to get the table name from body of the statement
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$result['tablename'] = $statement->body[3]->value === '.' ? $statement->body[4]->value
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: $statement->body[2]->value;
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}
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} elseif ($statement instanceof AlterStatement) { // Parse ALTER statement
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if ($options === null || $options === [] || ! isset($options[3])) {
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return $result;
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}
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if ($options[3] === 'VIEW' || $options[3] === 'TABLE') {
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$result['identifier'] = 'ALTER ' . $options[3];
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$result['tablename'] = $statement->table->table;
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} elseif ($options[3] === 'DATABASE') {
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$result['identifier'] = 'ALTER DATABASE';
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$result['tablename'] = '';
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$GLOBALS['db'] = $statement->table->table;
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}
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} elseif ($statement instanceof DropStatement) { // Parse DROP statement
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if ($options === null || $options === [] || ! isset($options[1])) {
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return $result;
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}
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if ($options[1] === 'VIEW' || $options[1] === 'TABLE') {
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$result['identifier'] = 'DROP ' . $options[1];
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$result['tablename'] = $statement->fields[0]->table;
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} elseif ($options[1] === 'DATABASE') {
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$result['identifier'] = 'DROP DATABASE';
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$result['tablename'] = '';
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$GLOBALS['db'] = $statement->fields[0]->table;
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} elseif ($options[1] === 'INDEX') {
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$result['identifier'] = 'DROP INDEX';
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$result['tablename'] = $statement->table->table;
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}
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} elseif ($statement instanceof RenameStatement) { // Parse RENAME statement
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$result['identifier'] = 'RENAME TABLE';
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$result['tablename'] = $statement->renames[0]->old->table;
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$result['tablename_after_rename'] = $statement->renames[0]->new->table;
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}
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|
|
|
if (isset($result['identifier'])) {
|
|
return $result;
|
|
}
|
|
|
|
// DML statements
|
|
$result['type'] = 'DML';
|
|
|
|
// Parse UPDATE statement
|
|
if ($statement instanceof UpdateStatement) {
|
|
$result['identifier'] = 'UPDATE';
|
|
$result['tablename'] = $statement->tables[0]->table;
|
|
}
|
|
|
|
// Parse INSERT INTO statement
|
|
if ($statement instanceof InsertStatement) {
|
|
$result['identifier'] = 'INSERT';
|
|
$result['tablename'] = $statement->into->dest->table;
|
|
}
|
|
|
|
// Parse DELETE statement
|
|
if ($statement instanceof DeleteStatement) {
|
|
$result['identifier'] = 'DELETE';
|
|
$result['tablename'] = $statement->from[0]->table;
|
|
}
|
|
|
|
// Parse TRUNCATE statement
|
|
if ($statement instanceof TruncateStatement) {
|
|
$result['identifier'] = 'TRUNCATE';
|
|
$result['tablename'] = $statement->table->table;
|
|
}
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Analyzes a given SQL statement and saves tracking data.
|
|
*
|
|
* @param string $query a SQL query
|
|
*/
|
|
public static function handleQuery(string $query): void
|
|
{
|
|
// If query is marked as untouchable, leave
|
|
if (mb_strstr($query, '/*NOTRACK*/')) {
|
|
return;
|
|
}
|
|
|
|
if (substr($query, -1) !== ';') {
|
|
$query .= ";\n";
|
|
}
|
|
|
|
// Get database name
|
|
$dbname = trim($GLOBALS['db'] ?? '', '`');
|
|
// $dbname can be empty, for example when coming from Synchronize
|
|
// and this is a query for the remote server
|
|
if ($dbname === '') {
|
|
return;
|
|
}
|
|
|
|
$relation = new Relation($GLOBALS['dbi']);
|
|
$trackingFeature = $relation->getRelationParameters()->trackingFeature;
|
|
if ($trackingFeature === null) {
|
|
return;
|
|
}
|
|
|
|
if (! self::isAnyTrackingInProgress($GLOBALS['dbi'], $trackingFeature, $dbname)) {
|
|
return;
|
|
}
|
|
|
|
// Get some information about query
|
|
$result = self::parseQuery($query);
|
|
|
|
// If we found a valid statement
|
|
if (! isset($result['identifier'])) {
|
|
return;
|
|
}
|
|
|
|
// The table name was not found, see issue: #16837 as an example
|
|
// Also checks if the value is not null
|
|
if (! isset($result['tablename'])) {
|
|
return;
|
|
}
|
|
|
|
$version = self::getVersion($dbname, $result['tablename'], $result['identifier']);
|
|
|
|
// If version not exists and auto-creation is enabled
|
|
if ($GLOBALS['cfg']['Server']['tracking_version_auto_create'] == true && $version == -1) {
|
|
// Create the version
|
|
|
|
switch ($result['identifier']) {
|
|
case 'CREATE TABLE':
|
|
self::createVersion($dbname, $result['tablename'], '1');
|
|
break;
|
|
case 'CREATE VIEW':
|
|
self::createVersion($dbname, $result['tablename'], '1', '', true);
|
|
break;
|
|
case 'CREATE DATABASE':
|
|
self::createDatabaseVersion($dbname, '1', $query);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// If version exists
|
|
if ($version == -1) {
|
|
return;
|
|
}
|
|
|
|
if (! self::isTracked($dbname, $result['tablename'])) {
|
|
return;
|
|
}
|
|
|
|
if ($result['type'] === 'DDL') {
|
|
$saveTo = 'schema_sql';
|
|
} elseif ($result['type'] === 'DML') {
|
|
$saveTo = 'data_sql';
|
|
} else {
|
|
$saveTo = '';
|
|
}
|
|
|
|
$date = Util::date('Y-m-d H:i:s');
|
|
|
|
// Cut off `dbname`. from query
|
|
$query = preg_replace(
|
|
'/`' . preg_quote($dbname, '/') . '`\s?\./',
|
|
'',
|
|
$query,
|
|
);
|
|
|
|
// Add log information
|
|
$query = self::getLogComment() . $query;
|
|
|
|
$relation = new Relation($GLOBALS['dbi']);
|
|
$trackingFeature = $relation->getRelationParameters()->trackingFeature;
|
|
if ($trackingFeature === null) {
|
|
return;
|
|
}
|
|
|
|
// Mark it as untouchable
|
|
$sqlQuery = sprintf(
|
|
'/*NOTRACK*/' . "\n" . 'UPDATE %s.%s SET %s = CONCAT(%s, %s), `date_updated` = %s',
|
|
Util::backquote($trackingFeature->database),
|
|
Util::backquote($trackingFeature->tracking),
|
|
Util::backquote($saveTo),
|
|
Util::backquote($saveTo),
|
|
$GLOBALS['dbi']->quoteString("\n" . $query, Connection::TYPE_CONTROL),
|
|
$GLOBALS['dbi']->quoteString($date, Connection::TYPE_CONTROL),
|
|
);
|
|
|
|
// If table was renamed we have to change
|
|
// the tablename attribute in pma_tracking too
|
|
if ($result['identifier'] === 'RENAME TABLE') {
|
|
$sqlQuery .= ', `table_name` = '
|
|
. $GLOBALS['dbi']->quoteString($result['tablename_after_rename'], Connection::TYPE_CONTROL)
|
|
. ' ';
|
|
}
|
|
|
|
// Save the tracking information only for
|
|
// 1. the database
|
|
// 2. the table / view
|
|
// 3. the statements
|
|
// we want to track
|
|
$sqlQuery .= sprintf(
|
|
" WHERE FIND_IN_SET('" . $result['identifier'] . "',tracking) > 0" .
|
|
' AND `db_name` = %s ' .
|
|
' AND `table_name` = %s ' .
|
|
' AND `version` = %s ',
|
|
$GLOBALS['dbi']->quoteString($dbname, Connection::TYPE_CONTROL),
|
|
$GLOBALS['dbi']->quoteString($result['tablename'], Connection::TYPE_CONTROL),
|
|
$GLOBALS['dbi']->quoteString((string) $version, Connection::TYPE_CONTROL),
|
|
);
|
|
|
|
$GLOBALS['dbi']->queryAsControlUser($sqlQuery);
|
|
}
|
|
|
|
private static function isAnyTrackingInProgress(
|
|
DatabaseInterface $dbi,
|
|
TrackingFeature $trackingFeature,
|
|
string $dbname,
|
|
): bool {
|
|
$sqlQuery = sprintf(
|
|
'/*NOTRACK*/ SELECT 1 FROM %s.%s WHERE tracking_active = 1 AND db_name = %s LIMIT 1',
|
|
Util::backquote($trackingFeature->database),
|
|
Util::backquote($trackingFeature->tracking),
|
|
$dbi->quoteString($dbname, Connection::TYPE_CONTROL),
|
|
);
|
|
|
|
return $dbi->queryAsControlUser($sqlQuery)->fetchValue() !== false;
|
|
}
|
|
}
|
