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<?php |
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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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/** |
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* Admin view query construction for the redirect/captured lists. |
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* |
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* Builds the SQL for the admin redirect/captured lists: high-impact captured |
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* count, regex redirects, optimized count, and the single-table read/count |
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* against wp_abj404_redirects (Denorm Step 3b). The staged view_done read path |
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* that used to live here was removed when the denorm chain dropped the |
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* wp_abj404_view_done table (Step 3e-D / i467); admin reads now serve straight |
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* off the redirects row. |
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*/ |
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class ABJ_404_Solution_ViewQueryBuilder { |
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|
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/** @var ABJ_404_Solution_DatabaseCore */ |
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private $dbCore; |
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|
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/** @var ABJ_404_Solution_ViewQueryPolicy */ |
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private $policy; |
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|
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/** |
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* @param ABJ_404_Solution_DatabaseCore $dbCore |
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*/ |
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public function __construct(ABJ_404_Solution_DatabaseCore $dbCore) { |
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$this->dbCore = $dbCore; |
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$this->policy = new ABJ_404_Solution_ViewQueryPolicy(); |
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} |
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|
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/** @return string */ |
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public function buildHighImpactCapturedCountQuery(): string { |
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// Plain equality gives the optimizer an indexable requested_url probe; |
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// the BINARY predicate keeps exact-match URL semantics. |
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$logsHitsTable = $this->dbCore->doTableNameReplacements('{wp_abj404_logs_hits}'); |
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$canonicalRedirectUrl = "COALESCE(r.canonical_url, CONCAT('/', TRIM(BOTH '/' FROM r.url)))"; |
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$comparableRedirectUrl = $this->dbCore->collationHelper()->coerceExpressionToColumnCollation( |
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$canonicalRedirectUrl, |
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array('table' => $logsHitsTable, 'column' => 'requested_url') |
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); |
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// allow-unbounded-select: COUNT(*) aggregate; returns a single row |
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$query = "SELECT COUNT(*) AS cnt |
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FROM {wp_abj404_redirects} r |
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INNER JOIN {wp_abj404_logs_hits} h |
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ON h.requested_url = " . $comparableRedirectUrl . " |
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AND BINARY h.requested_url = BINARY |
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COALESCE(r.canonical_url, CONCAT('/', TRIM(BOTH '/' FROM r.url))) |
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WHERE r.status = " . ABJ404_STATUS_CAPTURED . " AND r.disabled = 0 |
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AND h.logshits >= 3"; |
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return $this->dbCore->doTableNameReplacements($query); |
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} |
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|
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/** |
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* @param int|null $limit |
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* @return array<int, array<string, mixed>> |
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*/ |
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public function queryRegexRedirects(?int $limit = null) { |
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return $this->queryRegexRedirectsPage(array( |
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'after_id' => 0, |
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'limit' => $limit, |
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)); |
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} |
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|
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/** |
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* Read one ascending-id page of active regex redirects. |
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* |
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* @param array{after_id: int, limit: int|null} $page |
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* @return array<int, array<string, mixed>> |
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*/ |
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public function queryRegexRedirectsPage(array $page): array { |
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$afterId = max(0, (int)($page['after_id'] ?? 0)); |
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$limit = $page['limit'] ?? null; |
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$query = "select \n {wp_abj404_redirects}.id,\n {wp_abj404_redirects}.url,\n {wp_abj404_redirects}.status,\n" |
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. " {wp_abj404_redirects}.type,\n {wp_abj404_redirects}.final_dest,\n {wp_abj404_redirects}.code,\n" |
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. " {wp_abj404_redirects}.timestamp,\n {wp_posts}.id as wp_post_id\n " |
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. "from {wp_abj404_redirects}\n " |
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. " LEFT OUTER JOIN {wp_posts} \n " |
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. " on {wp_abj404_redirects}.final_dest = {wp_posts}.id \n " |
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. "where status in (" . ABJ404_STATUS_REGEX . ") \n " |
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. " and disabled = 0\n" |
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. " and {wp_abj404_redirects}.id > " . $afterId . "\n" |
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. "order by {wp_abj404_redirects}.id ASC"; |
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if ($limit !== null) { |
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$query .= "\nlimit " . max(1, intval($limit)); |
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} |
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|
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$results = $this->dbCore->queryAndGetResults($query); |
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$rows = is_array($results['rows'] ?? null) ? $results['rows'] : array(); |
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/** @var array<int, array<string, mixed>> $rows */ |
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return $rows; |
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} |
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|
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/** |
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* @param string $sub |
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* @param array<string, mixed> $tableOptions |
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* @return string |
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*/ |
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public function getOptimizedRedirectsForViewCountQuery(string $sub, array $tableOptions): string { |
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$statusTypes = $this->policy->resolveStatusTypeList($sub, $tableOptions); |
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$trashValue = $this->policy->resolveTrashValue($tableOptions); |
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$scoreRangeClause = $this->policy->buildScoreRangeClause($tableOptions, 'wp_abj404_redirects.'); // allow-prefix-literal: SQL alias bound by FROM clause |
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|
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$query = "SELECT COUNT(*) AS count\n" |
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. "FROM {wp_abj404_redirects} wp_abj404_redirects\n" // allow-prefix-literal: second token is the SQL alias name, not a table reference |
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. "WHERE 1 and status IN (" . $statusTypes . ") AND disabled = " . intval($trashValue) . "\n" |
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. $scoreRangeClause; |
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|
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return $this->dbCore->doTableNameReplacements($query); |
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} |
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|
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/** |
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* Execute the single-table redirects read for one page (Denorm Step 3b). |
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* |
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* Serves rows straight off wp_abj404_redirects, where every sortable column |
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* (url, status, type, code, timestamp, score, logshits, last_used, |
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* dest_for_view) is a real column -> a single-table filesort over at most one |
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* page of rows, no temp-table materialize, no join. The four derived columns |
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* are refreshed live per visible row by RedirectsViewLiveResolver after this |
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* read; this method only fetches the ordered/filtered page. |
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* |
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* @param string $sub |
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* @param array<string, mixed> $tableOptions |
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* @param bool $derivedPresent Whether the four denorm columns exist on the |
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* redirects table (schema-drift tolerance: false selects base columns only |
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* and the live resolver fills the derived values). |
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* @return array<int, array<string, mixed>> |
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* @throws ABJ_404_Solution_ViewQueryFailureException When the database adapter reports a failed read. |
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*/ |
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public function readRedirectsSingleTable(string $sub, array $tableOptions, bool $derivedPresent = true): array { |
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$query = $this->buildRedirectsSingleTableReadQuery($sub, $tableOptions, $derivedPresent); |
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$result = $this->dbCore->queryAndGetResults($query, $this->resolveReadTimeoutOptions($tableOptions)); |
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$lastErrorRaw = $result['last_error'] ?? ''; |
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$lastError = is_scalar($lastErrorRaw) ? trim((string)$lastErrorRaw) : ''; |
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if (!empty($result['timed_out']) || $lastError !== '') { |
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$message = !empty($result['timed_out']) |
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? 'Redirect row query timed out.' |
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: 'Redirect row query failed: ' . $lastError; |
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throw new ABJ_404_Solution_ViewQueryFailureException($message); |
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} |
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$rows = is_array($result['rows'] ?? null) ? $result['rows'] : array(); |
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/** @var array<int, array<string, mixed>> $rows */ |
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return $rows; |
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} |
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|
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/** |
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* Build the queryAndGetResults options for the single-table read/count from |
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* the optional per-request timeout, with a level-9-safe numeric guard. |
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* |
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* @param array<string, mixed> $tableOptions |
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* @return array<string, int> |
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*/ |
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private function resolveReadTimeoutOptions(array $tableOptions): array { |
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$raw = $tableOptions['_abj404_query_timeout'] ?? null; |
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if (!is_numeric($raw)) { |
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return array(); |
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} |
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$timeout = (int)$raw; |
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return $timeout > 0 ? array('timeout' => $timeout) : array(); |
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} |
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|
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/** |
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* Execute the single-table filtered count against wp_abj404_redirects. |
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* |
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* @param string $sub |
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* @param array<string, mixed> $tableOptions |
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* @param bool $derivedPresent |
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* @return int |
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* @throws ABJ_404_Solution_ViewQueryFailureException When the aggregate is unavailable or malformed. |
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*/ |
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public function countRedirectsSingleTable(string $sub, array $tableOptions, bool $derivedPresent = true): int { |
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$query = $this->buildRedirectsSingleTableCountQuery($sub, $tableOptions, $derivedPresent); |
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$result = $this->dbCore->queryAndGetResults($query, $this->resolveReadTimeoutOptions($tableOptions)); |
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$lastErrorRaw = $result['last_error'] ?? ''; |
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$lastError = is_scalar($lastErrorRaw) ? trim((string)$lastErrorRaw) : ''; |
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if (!empty($result['timed_out']) || $lastError !== '') { |
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$message = !empty($result['timed_out']) |
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? 'Filtered redirect count query timed out.' |
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: 'Filtered redirect count query failed: ' . $lastError; |
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throw new ABJ_404_Solution_ViewQueryFailureException($message); |
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} |
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$rows = is_array($result['rows'] ?? null) ? $result['rows'] : array(); |
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if (empty($rows) || !is_array($rows[0])) { |
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throw new ABJ_404_Solution_ViewQueryFailureException( |
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'Filtered redirect count query returned no aggregate row.' |
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); |
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} |
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$raw = $rows[0]['cnt'] ?? reset($rows[0]); |
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if (!is_numeric($raw)) { |
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throw new ABJ_404_Solution_ViewQueryFailureException( |
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'Filtered redirect count query returned a nonnumeric aggregate.' |
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); |
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} |
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return intval($raw); |
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} |
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|
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/** |
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* @param string $sub |
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* @param array<string, mixed> $tableOptions |
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* @param bool $derivedPresent |
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* @return string |
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*/ |
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public function buildRedirectsSingleTableReadQuery(string $sub, array $tableOptions, bool $derivedPresent = true): string { |
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$effectiveSort = $this->resolveEffectiveSort($tableOptions, $derivedPresent); |
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$orderBy = $effectiveSort['orderby']; |
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$order = $effectiveSort['order']; |
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|
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$rawPaged = $tableOptions['paged'] ?? 1; |
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$paged = max(1, is_scalar($rawPaged) ? intval($rawPaged) : 1); |
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$rawPerpage = $tableOptions['perpage'] ?? ABJ404_OPTION_DEFAULT_PERPAGE; |
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$perpage = max(1, is_scalar($rawPerpage) ? intval($rawPerpage) : (int)ABJ404_OPTION_DEFAULT_PERPAGE); |
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$limitStart = ($paged - 1) * $perpage; |
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|
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// The derived columns are projected only when they exist, purely so the |
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// live resolver can dedupe its write-back against the stored values; the |
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// rendered values come from the live resolution either way. On a |
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// schema-drifted table without them, the base-column projection still |
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// renders a complete page. |
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$derivedProjection = $derivedPresent |
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? ",\n dest_for_view, published_status, logshits, last_used" : ""; |
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|
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// Tie-break on the PK id in the sort direction (not on url): url is |
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// varchar(2048) and only prefix-indexable, so an `ORDER BY <col>, url` |
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// can never be index-ordered and always filesorts. With `id <dir>` a |
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// single ascending composite index (disabled, <col>, id) serves both |
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// ASC and DESC scans, so the Hits / Last Used sorts stop after one page |
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// instead of sorting the whole active-redirect set. See |
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// RedirectsDerivedSortExplainPlanTest. id is unique, so the ordering is |
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// still fully deterministic for pagination. |
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return "SELECT id, url, status, type, final_dest, code, timestamp, engine, score" |
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. $derivedProjection . "\n" |
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. "FROM {wp_abj404_redirects}\n" |
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. $this->buildSingleTableWhere($sub, $tableOptions, $derivedPresent) |
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. "ORDER BY " . $orderBy . " " . $order . ", id " . $order . "\n" |
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. "LIMIT " . $limitStart . ", " . $perpage; |
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} |
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|
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/** |
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* @param string $sub |
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* @param array<string, mixed> $tableOptions |
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* @param bool $derivedPresent |
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* @return string |
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*/ |
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public function buildRedirectsSingleTableCountQuery(string $sub, array $tableOptions, bool $derivedPresent = true): string { |
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return "SELECT COUNT(*) AS cnt\n" |
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. "FROM {wp_abj404_redirects}\n" |
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. $this->buildSingleTableWhere($sub, $tableOptions, $derivedPresent); |
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} |
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|
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/** |
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* The shared WHERE body for the single-table read and count: status filter, |
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* trash (disabled) filter, score range, and the dest_for_view-aware |
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* filterText search. Identical between read and count so a filtered count |
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* always equals the unpaginated row set (i457 invariant). The filterText |
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* destination-title match drops to url/label matching when the dest_for_view |
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* column is absent (schema-drift tolerance). |
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* |
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* @param string $sub |
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* @param array<string, mixed> $tableOptions |
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* @param bool $derivedPresent |
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* @return string |
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*/ |
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private function buildSingleTableWhere(string $sub, array $tableOptions, bool $derivedPresent = true): string { |
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$statusTypes = $this->policy->resolveStatusTypeList($sub, $tableOptions); |
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$trashClause = 'AND disabled = ' . intval($this->policy->resolveTrashValue($tableOptions)); |
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$scoreRangeClause = $this->policy->buildScoreRangeClause($tableOptions, ''); |
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$filterTextClause = $this->policy->buildFilterTextClause($sub, $tableOptions, true, $derivedPresent); |
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|
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return "WHERE status IN (" . $statusTypes . ")\n" |
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. " " . $trashClause . "\n" |
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. " " . $scoreRangeClause . "\n" |
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. " " . $filterTextClause . "\n"; |
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} |
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|
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/** |
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* Effective (orderby column, direction) for the single-table read ORDER BY. |
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* |
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* On EITHER tab, a URL or Destination sort that cannot be served index-ordered |
| 280 |
* right now (its narrow sort key is not ready: column missing, composite index |
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* missing, or the legacy-row drain not yet converged -- see |
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* RedirectsDenormSchemaReadiness::sortKeyReadyForColumn) would force a filesort over |
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* the wide source column (varchar(2048), prefix-only). On a large table that |
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* scan can exceed a shared host's max_statement_time, the server kills the |
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* query, and the tab is stuck on its loading placeholder every load. Until the |
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* sort key is ready we therefore serve the always-indexed safe default |
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* (timestamp DESC, "newest first") instead. This is display-only: the user's |
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* saved sort preference is left untouched and resumes automatically once the |
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* sort key is ready -- and the column header is rendered non-sortable with a |
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* progress tooltip meanwhile (captured tab: View_CapturedURLsTable; Page |
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* Redirects tab: ABJ_404_Solution_AdminTableColumnHeaders). |
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* |
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* Applied to BOTH tabs (the literal "no wide-column filesort" rule): the |
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* Page Redirects status filter does not make the wide-url filesort safe at |
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* scale, and the readiness predicate self-heals so the real sort resumes the |
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* moment the key is index-ordered. |
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* |
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* @param array<string, mixed> $tableOptions |
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* @param bool $derivedPresent |
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* @return array{orderby: string, order: string} |
| 301 |
*/ |
| 302 |
private function resolveEffectiveSort(array $tableOptions, bool $derivedPresent): array { |
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$rawOrderBy = strtolower(is_string($tableOptions['orderby'] ?? null) ? $tableOptions['orderby'] : ''); |
| 304 |
if ($this->wideColumnSortPendingBackfill($rawOrderBy, $tableOptions)) { |
| 305 |
return array('orderby' => 'timestamp', 'order' => 'DESC'); |
| 306 |
} |
| 307 |
return array( |
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'orderby' => $this->resolveSingleTableOrderByColumn($tableOptions, $derivedPresent), |
| 309 |
'order' => $this->policy->resolveOrderDirection($tableOptions), |
| 310 |
); |
| 311 |
} |
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|
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/** |
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* Whether the requested sort targets a narrow sort-key-backed column |
| 315 |
* (url -> url_sort_key, dest -> dest_sort_key) that cannot be served |
| 316 |
* index-ordered yet. The coordinator sets the matching |
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* _abj404_*_sort_key_present flag true only when the column exists AND its |
| 318 |
* composite indexes exist AND its drain latch is set |
| 319 |
* (RedirectsDenormSchemaReadiness::sortKeyReadyForColumn); a falsey flag means the |
| 320 |
* only available ordering is a wide-column filesort. Sorts on real |
| 321 |
* always-populated columns (logshits, last_used, score, code, type, status, |
| 322 |
* timestamp) are never pending and are not substituted. |
| 323 |
* |
| 324 |
* @param string $rawOrderBy Lowercased requested orderby. |
| 325 |
* @param array<string, mixed> $tableOptions |
| 326 |
* @return bool |
| 327 |
*/ |
| 328 |
private function wideColumnSortPendingBackfill(string $rawOrderBy, array $tableOptions): bool { |
| 329 |
if ($rawOrderBy === 'url') { |
| 330 |
return empty($tableOptions['_abj404_url_sort_key_present']); |
| 331 |
} |
| 332 |
if ($rawOrderBy === 'dest' || $rawOrderBy === 'final_dest') { |
| 333 |
return empty($tableOptions['_abj404_dest_sort_key_present']); |
| 334 |
} |
| 335 |
return false; |
| 336 |
} |
| 337 |
|
| 338 |
/** |
| 339 |
* Resolve the ORDER BY column for the single-table read. |
| 340 |
* |
| 341 |
* A sort on a derived column (logshits / last_used / dest) uses the real |
| 342 |
* column whenever the four denorm columns exist. The only fallback is |
| 343 |
* schema-drift tolerance: when the columns are absent entirely (the column-add |
| 344 |
* ALTER never completed) a derived sort would reference a missing column, so |
| 345 |
* it falls back to the always-present native url column. |
| 346 |
* |
| 347 |
* No backfill-completion flag is consulted. Each derived column degrades |
| 348 |
* gracefully for not-yet-backfilled rows by construction, so ordering on it is |
| 349 |
* always meaningful and self-heals as rows are resolved: |
| 350 |
* - logshits is NOT NULL and defaults to 0, so an un-backfilled row simply |
| 351 |
* sorts as 0 hits and rises into place once the rollup is written; |
| 352 |
* - last_used is NULL for no-hit rows, which sort last; |
| 353 |
* - the dest_for_view ordering groups NULL/empty destinations last via its |
| 354 |
* CASE expression (see ViewQueryPolicy::resolveOrderByColumn). |
| 355 |
* |
| 356 |
* The previous implementation gated these sorts on the obsolete denorm |
| 357 |
* backfill-complete option and fell back to url order until it flipped. That |
| 358 |
* option was flipped only when no row had dest_for_view NULL, a condition a |
| 359 |
* live 404 site never reaches: every newly captured 404 is inserted with |
| 360 |
* dest_for_view NULL, so the option stayed false forever and the Hits / Last |
| 361 |
* Used / Destination columns were permanently sorted by url instead of by |
| 362 |
* their own values (the rendered Hits column looked random). |
| 363 |
* |
| 364 |
* @param array<string, mixed> $tableOptions |
| 365 |
* @param bool $derivedPresent Whether the four denorm columns exist on the |
| 366 |
* table. False (schema drift) is the only case that forces the url fallback. |
| 367 |
* @return string |
| 368 |
*/ |
| 369 |
private function resolveSingleTableOrderByColumn(array $tableOptions, bool $derivedPresent = true): string { |
| 370 |
$rawOrderByValue = $tableOptions['orderby'] ?? ''; |
| 371 |
$rawOrderBy = strtolower(is_string($rawOrderByValue) ? $rawOrderByValue : ''); |
| 372 |
$derivedSorts = array('logshits', 'last_used', 'dest', 'final_dest'); |
| 373 |
if (in_array($rawOrderBy, $derivedSorts, true) && !$derivedPresent) { |
| 374 |
return 'url'; |
| 375 |
} |
| 376 |
// Destination sort: ORDER BY the narrow indexable dest_sort_key |
| 377 |
// (uniform direction -> (disabled, dest_sort_key, id) / |
| 378 |
// (status, disabled, dest_sort_key, id) serve it without a filesort) when |
| 379 |
// the column exists. Blank/NULL destinations then sort naturally (first |
| 380 |
// ascending, last descending) rather than the old always-last CASE, which |
| 381 |
// was the very thing that forced a filesort (computed expression over a |
| 382 |
// varchar(2048) prefix-only column). When the column is absent (an install |
| 383 |
// mid-upgrade), fall back to the CASE-on-dest_for_view filesort so the |
| 384 |
// sort still works -- just unindexed -- until the column-add completes. |
| 385 |
if (($rawOrderBy === 'dest' || $rawOrderBy === 'final_dest') |
| 386 |
&& !empty($tableOptions['_abj404_dest_sort_key_present'])) { |
| 387 |
return 'dest_sort_key'; |
| 388 |
} |
| 389 |
// URL sort (incl. the Page Redirects default): ORDER BY the narrow |
| 390 |
// indexable url_sort_key so (disabled, url_sort_key, id) / |
| 391 |
// (status, disabled, url_sort_key, id) serve it without a filesort. url is |
| 392 |
// varchar(2048), prefix-only, so ORDER BY url itself always filesorts even |
| 393 |
// when every value is short (MySQL will not order by a prefix index). When |
| 394 |
// the column is absent (an install mid-upgrade) fall back to raw url so the |
| 395 |
// sort still works -- unindexed -- until the column-add completes. URLs |
| 396 |
// longer than 191 chars sharing a 191-char prefix tie-break by id. |
| 397 |
if ($rawOrderBy === 'url' && !empty($tableOptions['_abj404_url_sort_key_present'])) { |
| 398 |
return 'url_sort_key'; |
| 399 |
} |
| 400 |
return $this->policy->resolveOrderByColumn($tableOptions); |
| 401 |
} |
| 402 |
|
| 403 |
/** |
| 404 |
* @param string $sub |
| 405 |
* @param array<string, mixed> $tableOptions |
| 406 |
* @return string |
| 407 |
*/ |
| 408 |
public function resolveStatusTypeList(string $sub, array $tableOptions): string { |
| 409 |
return $this->policy->resolveStatusTypeList($sub, $tableOptions); |
| 410 |
} |
| 411 |
|
| 412 |
/** |
| 413 |
* @param array<string, mixed> $tableOptions |
| 414 |
* @return string |
| 415 |
*/ |
| 416 |
public function resolveOrderByColumn(array $tableOptions): string { |
| 417 |
return $this->policy->resolveOrderByColumn($tableOptions); |
| 418 |
} |
| 419 |
|
| 420 |
} |
| 421 |
|
