85 lines
3.0 KiB
PHP
85 lines
3.0 KiB
PHP
<?php
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/**
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* @file
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* Install, update and uninstall functions for the mysql module.
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*/
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use Drupal\Core\Database\Database;
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use Drupal\Core\Render\Markup;
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/**
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* Implements hook_requirements().
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*/
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function mysql_requirements($phase) {
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$requirements = [];
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if ($phase === 'runtime') {
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// Test with MySql databases.
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if (Database::isActiveConnection()) {
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$connection = Database::getConnection();
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// Only show requirements when MySQL is the default database connection.
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if (!($connection->driver() === 'mysql' && $connection->getProvider() === 'mysql')) {
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return [];
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}
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$query = 'SELECT @@SESSION.tx_isolation';
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// The database variable "tx_isolation" has been removed in MySQL v8.0.3 and
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// has been replaced by "transaction_isolation".
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// @see https://dev.mysql.com/doc/refman/5.7/en/server-system-variables.html#sysvar_tx_isolation
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// @see https://dev.mysql.com/doc/refman/8.0/en/added-deprecated-removed.html
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if (!$connection->isMariaDb() && version_compare($connection->version(), '8.0.2-AnyName', '>')) {
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$query = 'SELECT @@SESSION.transaction_isolation';
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}
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$isolation_level = $connection->query($query)->fetchField();
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$tables_missing_primary_key = [];
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$tables = $connection->schema()->findTables('%');
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foreach ($tables as $table) {
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$primary_key_column = Database::getConnection()->query("SHOW KEYS FROM {" . $table . "} WHERE Key_name = 'PRIMARY'")->fetchAllAssoc('Column_name');
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if (empty($primary_key_column)) {
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$tables_missing_primary_key[] = $table;
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}
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}
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$description = [];
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if ($isolation_level == 'READ-COMMITTED') {
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if (empty($tables_missing_primary_key)) {
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$severity_level = REQUIREMENT_OK;
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}
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else {
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$severity_level = REQUIREMENT_ERROR;
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}
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}
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else {
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if ($isolation_level == 'REPEATABLE-READ') {
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$severity_level = REQUIREMENT_WARNING;
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}
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else {
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$severity_level = REQUIREMENT_ERROR;
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$description[] = t('This is not supported by Drupal.');
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}
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$description[] = t('The recommended level for Drupal is "READ COMMITTED".');
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}
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if (!empty($tables_missing_primary_key)) {
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$description[] = t('For this to work correctly, all tables must have a primary key. The following table(s) do not have a primary key: @tables.', ['@tables' => implode(', ', $tables_missing_primary_key)]);
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}
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$description[] = t('See the <a href=":performance_doc">setting MySQL transaction isolation level</a> page for more information.', [
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':performance_doc' => 'https://www.drupal.org/docs/system-requirements/setting-the-mysql-transaction-isolation-level',
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]);
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$requirements['mysql_transaction_level'] = [
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'title' => t('Transaction isolation level'),
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'severity' => $severity_level,
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'value' => $isolation_level,
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'description' => Markup::create(implode(' ', $description)),
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];
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}
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}
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return $requirements;
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}
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