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<?php |
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/** |
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* Table-name parsing and metadata probes for database error handling. |
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*/ |
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|
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if (!defined('ABSPATH')) { |
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exit; |
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} |
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|
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// allow-no-test-found: covered through DatabaseErrorClassifier facade by tests/MissingTableErrorDoubleReportingTest.php and tests/DataAccessRetrySemanticsTest.php |
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class ABJ_404_Solution_DatabaseErrorTableInspector { |
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|
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/** @var ABJ_404_Solution_Logging */ |
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private $logger; |
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|
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/** |
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* @param ABJ_404_Solution_Logging $logger |
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*/ |
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public function __construct($logger) { |
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$this->logger = $logger; |
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} |
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|
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/** |
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* Extract a table name from a MySQL "table is full" error message. |
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* |
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* @param string $errorText |
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* @return string|null |
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*/ |
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public function extractTableNameFromFullError(string $errorText): ?string { |
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if (preg_match("/table '([^']+)' is full/i", $errorText, $m)) { |
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return $m[1]; |
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} |
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return null; |
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} |
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|
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/** |
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* Extract the table name from a MySQL "doesn't exist" error message. |
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* |
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* @param string $errorText |
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* @return string |
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*/ |
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public function extractMissingTableNameFromError(string $errorText): string { |
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if ($errorText === '') { |
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return ''; |
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} |
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if (!preg_match("/Table '([^']+)' doesn't exist/i", $errorText, $matches)) { |
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return ''; |
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} |
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$fullName = $matches[1]; |
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$dotPos = strrpos($fullName, '.'); |
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return $dotPos !== false ? substr($fullName, $dotPos + 1) : $fullName; |
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} |
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|
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/** |
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* Check if a given table uses the InnoDB storage engine. |
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* |
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* @param string $tableName |
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* @return bool |
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*/ |
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public function isInnoDBTable(string $tableName): bool { |
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global $wpdb; |
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/** @var wpdb $wpdb */ |
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if (!is_object($wpdb) || !method_exists($wpdb, 'get_var') || !method_exists($wpdb, 'prepare')) { |
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return false; |
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} |
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if (defined('DB_NAME')) { |
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$dbName = (string)DB_NAME; |
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} else { |
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static $warnedNoDbName = false; |
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if (!$warnedNoDbName) { |
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$warnedNoDbName = true; |
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$this->logger->warn(__METHOD__ . ': DB_NAME undefined; using empty schema in InnoDB probe'); |
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} |
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$dbName = ''; |
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} |
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// DAO-bypass-approved: read-only information_schema engine probe for classifying table-full DB errors. |
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$engine = $wpdb->get_var( |
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// DAO-bypass-approved: prepare call for read-only information_schema engine probe placeholders. |
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$wpdb->prepare( |
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"SELECT ENGINE FROM information_schema.TABLES WHERE TABLE_SCHEMA = %s AND TABLE_NAME = %s", |
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$dbName, |
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$tableName |
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) |
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); |
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return is_string($engine) && strtolower($engine) === 'innodb'; |
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} |
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} |
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|
