| 1 |
<?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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require_once __DIR__ . '/../DatabaseCollationHelper.php'; |
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|
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/** |
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* Permanent-DDL discovery, execution, and materialization verification for |
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* plugin tables. |
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* |
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* Owns discovering the permanent (non-Temp) CREATE-TABLE DDL files on disk |
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* (discoverPermanentDDLFiles), running them with charset/collation rewriting |
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* applied (runInitialCreateTables / createMissingPermanentTables / |
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* applyPluginTableCharsetCollate), and verifying each CREATE actually |
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* materialized the table on disk (verifyTableMaterialized). |
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* |
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* Extracted from the table-bootstrap orchestrator (DatabaseUpgradeBootstrap) |
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* for the same reason as the lowercase-rename collaborator: DDL execution is |
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* a distinct concern from bootstrap orchestration, with its own file-glob |
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* discovery and per-table materialization verification. |
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* |
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* Seeding the DATA a newly added column needs is deliberately NOT here: that |
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* is {@see ABJ_404_Solution_DatabaseUpgradeAddedColumnBackfill}, reached from |
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* the schema-diff component that knows a column was actually added. |
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* |
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* Collaborator of ABJ_404_Solution_DatabaseUpgradeBootstrap, which constructs |
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* it fresh on every call (never cached) with the upgrade coordinator and the |
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* current DB core / logger, so it always observes whichever dependencies are |
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* current at call time (dbCore / logger can be swapped at runtime via |
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* replaceDatabaseUpgradeDependencies() on the owning component). |
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*/ |
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class ABJ_404_Solution_DatabaseTableDdlExecutor { |
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|
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/** @var ABJ_404_Solution_DatabaseUpgradeCoordinator */ |
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private $coordinator; |
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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_Logging */ |
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private $logger; |
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|
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/** |
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* @param ABJ_404_Solution_DatabaseUpgradeCoordinator $coordinator |
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* @param ABJ_404_Solution_DatabaseCore $dbCore Deliberately untyped at the |
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* PHP level (matching ABJ_404_Solution_DatabaseUpgradeComponent::$dbCore): |
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* this collaborator needs methods from both DatabaseCoreInterface |
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* (tableNameResolver) and DatabaseQueryInterface (queryAndGetResults, |
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* doTableNameReplacements), and PHP 7.4 (the plugin's floor version) has |
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* no intersection types. Test doubles (e.g. Abj404NullDatabaseCore) |
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* implement those interfaces without extending the concrete class, so a |
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* native type hint here would break them. |
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* @param ABJ_404_Solution_Logging $logger |
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*/ |
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public function __construct(ABJ_404_Solution_DatabaseUpgradeCoordinator $coordinator, |
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$dbCore, ABJ_404_Solution_Logging $logger) { |
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$this->coordinator = $coordinator; |
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$this->dbCore = $dbCore; |
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$this->logger = $logger; |
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} |
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|
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/** |
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* Discover all permanent (non-Temp) DDL files and extract table metadata. |
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* |
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* @return array<int, array{placeholder: string, bareTableName: string, ddlContent: string}> |
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*/ |
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public function discoverPermanentDDLFiles(): array { |
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$sqlDir = __DIR__ . '/../../sql'; |
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$files = glob($sqlDir . '/create*Table.sql'); |
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if (!is_array($files)) { |
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$files = []; |
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} |
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sort($files); |
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|
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$result = []; |
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foreach ($files as $file) { |
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if (stripos(basename($file), 'Temp') !== false) { |
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continue; |
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} |
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$ddlContent = ABJ_404_Solution_FileSystemService::readFileContents($file); |
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if (!is_string($ddlContent) || trim($ddlContent) === '') { |
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// Tie the diagnostic to this specific file: the zero-entries |
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// guard in runInitialCreateTables() only fires when EVERY |
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// file fails, so a lone empty/unreadable file among otherwise |
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// healthy ones would otherwise leave its table missing with |
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// no trail explaining why. |
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$this->logger->errorMessage( |
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'discoverPermanentDDLFiles() found ' . basename($file) . ' empty or ' |
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. 'unreadable. The table this file defines will not be created or ' |
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. 'repaired until the file is restored. Likely cause: a corrupted or ' |
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. 'incomplete plugin installation.' |
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); |
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continue; |
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} |
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if (!preg_match('/\{(wp_(abj404_\w+))\}/', $ddlContent, $m)) { |
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$this->logger->errorMessage( |
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'discoverPermanentDDLFiles() found ' . basename($file) . ' malformed: ' |
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. 'no {wp_abj404_*} table-name placeholder found. The table this file ' |
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. 'defines will not be created or repaired until the file is restored. ' |
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. 'Likely cause: a corrupted or incomplete plugin installation.' |
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); |
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continue; |
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} |
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// Transient staged-build tables (view_build, view_done, view_deleteme) |
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// are owned by the staged view-build collaborators. |
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// stageCreateBuildTable() creates view_build on demand, stageRenameSwap() |
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// renames it to view_done, and view_deleteme is the ephemeral previous- |
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// generation served table that gets dropped right after the swap. None |
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// of them should participate in the permanent-DDL bootstrap, repair, or |
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// missing-table check loops. Their absence between builds is normal, |
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// not a corruption signal. |
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if (in_array($m[2], array('abj404_view_build', 'abj404_view_done', 'abj404_view_deleteme'), true)) { |
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continue; |
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} |
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$result[] = [ |
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'placeholder' => '{' . $m[1] . '}', |
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'bareTableName' => $m[2], |
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'ddlContent' => $ddlContent, |
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]; |
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} |
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// Extension point: add-ons can register extra permanent abj404_* tables |
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// (same entry shape as above) to join the create/verify loops; malformed |
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// entries from a misbehaving callback are dropped. |
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$filtered = apply_filters('abj404_permanent_ddl_files', $result); |
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if (!is_array($filtered)) { |
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return $result; |
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} |
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$validated = array(); |
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foreach ($filtered as $entry) { |
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if (is_array($entry) |
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&& isset($entry['placeholder'], $entry['bareTableName'], $entry['ddlContent']) |
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&& is_string($entry['placeholder']) && trim($entry['placeholder']) !== '' |
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&& is_string($entry['bareTableName']) && trim($entry['bareTableName']) !== '' |
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&& is_string($entry['ddlContent']) && trim($entry['ddlContent']) !== '') { |
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$validated[] = array('placeholder' => $entry['placeholder'], |
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'bareTableName' => $entry['bareTableName'], 'ddlContent' => $entry['ddlContent']); |
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} |
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} |
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return $validated; |
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} |
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|
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/** @return void */ |
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public function runInitialCreateTables() { |
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// Re-add a stripped `id` PRIMARY KEY (via ALTER) BEFORE any CREATE TABLE |
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// IF NOT EXISTS runs. Without this step, an existing-but-broken table |
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// (missing the file's `id` PRIMARY KEY) would survive the IF NOT EXISTS |
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// check and verifyColumns would only ALTER ADD the missing non-PK |
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// columns, leaving the table without its primary key. Lives here (not |
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// just in correctIssuesBefore) so cron callers of createDatabaseTables() |
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// (which don't pass the $updatingToNewVersion flag) also repair |
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// stripped tables instead of propagating the broken state. |
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$this->coordinator->tableRepairUpgrade()->repairStrippedViewCacheTable(); |
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|
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$ngramTable = $this->dbCore->tableNameResolver()->getPrefixedTableName('abj404_ngram_cache'); |
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$ngramEpochMigrationSafe = $this->coordinator->nGramUpgrade()->ensureLastUpdatedEpochColumn($ngramTable); |
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|
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$ddlEntries = $this->discoverPermanentDDLFiles(); |
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if (empty($ddlEntries)) { |
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// Zero DDL files discovered means no plugin table can be created |
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// or repaired this run -- the plugin cannot function. Per the |
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// defensive-coding standard ("Can the plugin still do its job |
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// after this failure?"), this is a real error, not a warning: |
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// silently doing nothing here would leave a fresh install with |
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// no tables and no diagnostic trail explaining why. |
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$this->logger->errorMessage( |
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'discoverPermanentDDLFiles() found zero permanent CREATE-TABLE ' |
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. 'files (glob: includes/sql/create*Table.sql). No plugin tables ' |
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. 'can be created or repaired until this is resolved. Likely ' |
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. 'causes: a corrupted/incomplete plugin installation, the ' |
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. 'includes/sql/ directory missing or unreadable, or glob() ' |
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. 'disabled via php.ini disable_functions.' |
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); |
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} |
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foreach ($ddlEntries as $ddlEntry) { |
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if (!is_array($ddlEntry)) { |
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continue; |
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} |
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$placeholder = isset($ddlEntry['placeholder']) && is_string($ddlEntry['placeholder']) |
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? $ddlEntry['placeholder'] : ''; |
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$bareTableName = isset($ddlEntry['bareTableName']) && is_string($ddlEntry['bareTableName']) |
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? $ddlEntry['bareTableName'] : ''; |
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$ddlContent = isset($ddlEntry['ddlContent']) && is_string($ddlEntry['ddlContent']) |
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? $ddlEntry['ddlContent'] : ''; |
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|
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$query = $this->applyPluginTableCharsetCollate($ddlContent); |
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$this->dbCore->queryAndGetResults($query); |
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|
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$tableName = $this->dbCore->doTableNameReplacements($placeholder); |
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|
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// Per-table post-CREATE verification: confirm the table actually |
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// exists on disk. queryAndGetResults logs SQL errors generically, |
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// but a silently-failing CREATE (concurrent DROP, swallowed parse |
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// error, prefix drift, or insufficient privileges) is invisible |
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// without an explicit existence check. Log per-table so the debug |
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// log identifies which DDL didn't materialize and why downstream |
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// auto-repair attempts will keep failing. |
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if (!$this->verifyTableMaterialized(array('tableName' => $tableName, 'placeholder' => $placeholder))) { |
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// Don't abort the loop. Other tables can still get created. |
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continue; |
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} |
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|
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// Targeted online-DDL column add(s) before the generic verifyColumns() |
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// flow runs a bare ALTER. On large logsv2 tables (multi-GB on |
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// busy sites) bare ADD COLUMN can block the table for tens of |
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// seconds; the targeted helper uses ALGORITHM=INPLACE, LOCK=NONE |
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// so InnoDB 5.6 or newer picks the lockless online-DDL path. If the |
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// engine doesn't support it the helper falls back silently and |
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// verifyColumns() picks up the column add as a safety net. |
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if ($bareTableName === 'abj404_logsv2') { |
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$this->coordinator->canonicalUrlBackfillUpgrade()->ensureLogsv2CanonicalUrlColumn($tableName); |
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} |
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// Same logic for the redirects side. canonical_url is required by |
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// setupRedirect() and was added in 4.1.11; on a small fraction of |
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// sites dbDelta silently fails to add it, so every captured 404 |
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// emits "Unknown column 'canonical_url' in 'field list'" until |
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// verifyColumns eventually retries. Eagerly running the targeted |
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// add closes that window. |
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if ($bareTableName === 'abj404_redirects') { |
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$this->coordinator->canonicalUrlBackfillUpgrade()->ensureRedirectsCanonicalUrlColumn($tableName); |
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// Denorm Step 3a (i459): same eager online-DDL add for the four |
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// derived columns (logshits, last_used, dest_for_view, |
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// published_status) so they exist before verifyColumns() and |
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// before the chunked backfill reads them. Idempotent: each |
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// column is SHOW COLUMNS-guarded, so this is a no-op once added. |
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$this->coordinator->redirectsDenormBackfillUpgrade()->ensureRedirectsDenormColumns($tableName); |
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} |
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if ($bareTableName === 'abj404_ngram_cache' && !$ngramEpochMigrationSafe) { |
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continue; |
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} |
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|
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$this->coordinator->schemaDiffUpgrade()->verifyColumns($tableName, $query); |
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} |
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|
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// Table-specific post-creation steps. |
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$logsTable = $this->dbCore->doTableNameReplacements("{wp_abj404_logsv2}"); |
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$this->coordinator->indexesUpgrade()->ensureLogsCompositeIndex($logsTable); |
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} |
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|
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/** |
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* Materialize ONLY the permanent plugin tables that are currently missing, |
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* and nothing else. |
| 244 |
* |
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* This is the bounded counterpart to runInitialCreateTables(), for the |
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* per-query missing-table auto-repair path |
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* (DatabaseRepairPolicy::attemptMissingTableRepairAndRetry). That path runs |
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* inline inside whatever request happened to issue the failing query -- |
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* frontend 404 dispatch, admin AJAX, REST -- so it must do the minimum work |
| 250 |
* that makes the caller's retry succeed and no more. |
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* |
| 252 |
* The work here is bounded by construction: |
| 253 |
* - one SHOW TABLES probe per permanent DDL file (metadata only), |
| 254 |
* - one CREATE TABLE IF NOT EXISTS per table that is actually missing, |
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* - one post-CREATE materialization probe for each of those. |
| 256 |
* Every create*Table.sql file carries its full column list AND its full |
| 257 |
* index list, so a table created here is complete: it needs no follow-up |
| 258 |
* ALTER, no verifyColumns() diff (there is nothing to diff against a table |
| 259 |
* built from the current DDL), and no index pass. |
| 260 |
* |
| 261 |
* Deliberately absent, versus runInitialCreateTables() / |
| 262 |
* reallyCreateDatabaseTables(): the schema-wide collation sweep, the |
| 263 |
* MyISAM-to-InnoDB engine conversion, createIndexes(), the canonical_url |
| 264 |
* and denorm backfills, the lowercase-rename / orphan-adoption scan, the |
| 265 |
* permalink-cache rebuild, and the relative-path URL migration. Those are |
| 266 |
* drift correction and data backfill across tables that are NOT missing; |
| 267 |
* they are the daily maintenance cron's job (runSelfHealPrologue), never a |
| 268 |
* user-facing request's. Running them inline is what turned a single |
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* missing table on a large site into a multi-minute admin-AJAX stall. |
| 270 |
* |
| 271 |
* @return array<int, string> Fully-qualified names of the tables that were |
| 272 |
* missing on entry and that this pass materialized. Empty when nothing |
| 273 |
* was missing, or when every CREATE failed to materialize. |
| 274 |
*/ |
| 275 |
public function createMissingPermanentTables(): array { |
| 276 |
$created = array(); |
| 277 |
foreach ($this->discoverPermanentDDLFiles() as $ddlEntry) { |
| 278 |
if (!is_array($ddlEntry)) { |
| 279 |
continue; |
| 280 |
} |
| 281 |
$placeholder = isset($ddlEntry['placeholder']) && is_string($ddlEntry['placeholder']) |
| 282 |
? $ddlEntry['placeholder'] : ''; |
| 283 |
$ddlContent = isset($ddlEntry['ddlContent']) && is_string($ddlEntry['ddlContent']) |
| 284 |
? $ddlEntry['ddlContent'] : ''; |
| 285 |
if ($placeholder === '' || $ddlContent === '') { |
| 286 |
continue; |
| 287 |
} |
| 288 |
$tableName = $this->dbCore->doTableNameReplacements($placeholder); |
| 289 |
if (!is_string($tableName) || $tableName === '') { |
| 290 |
continue; |
| 291 |
} |
| 292 |
// Skip tables that already exist: the repair exists to close the |
| 293 |
// gap for the one table the failing query named, not to re-run DDL |
| 294 |
// for the whole schema on every recovered query. |
| 295 |
if ($this->tableExistsOnDisk($tableName)) { |
| 296 |
continue; |
| 297 |
} |
| 298 |
|
| 299 |
$this->dbCore->queryAndGetResults($this->applyPluginTableCharsetCollate($ddlContent)); |
| 300 |
|
| 301 |
if ($this->verifyTableMaterialized(array('tableName' => $tableName, 'placeholder' => $placeholder))) { |
| 302 |
$created[] = $tableName; |
| 303 |
} |
| 304 |
} |
| 305 |
return $created; |
| 306 |
} |
| 307 |
|
| 308 |
/** |
| 309 |
* Metadata-only existence probe for a fully-qualified plugin table. |
| 310 |
* |
| 311 |
* Routed through queryAndGetResults() (not a raw $wpdb->get_var()) so it |
| 312 |
* carries the DAO's query-timeout wrapper: a concurrent CREATE/ALTER/DROP |
| 313 |
* can hold a metadata lock that SHOW TABLES waits on, and an unbounded wait |
| 314 |
* inside a user-facing request is exactly what this repair path exists to |
| 315 |
* avoid. |
| 316 |
* |
| 317 |
* @param string $tableName Fully-qualified table name (with prefix). |
| 318 |
* @return bool |
| 319 |
*/ |
| 320 |
private function tableExistsOnDisk(string $tableName): bool { |
| 321 |
if ($tableName === '') { |
| 322 |
return false; |
| 323 |
} |
| 324 |
// @utf8-audit: opt-out - $tableName is a fully-qualified plugin table |
| 325 |
// name from doTableNameReplacements / $wpdb->prefix; never user input. |
| 326 |
$result = $this->dbCore->queryAndGetResults( |
| 327 |
"SHOW TABLES LIKE '" . esc_sql($tableName) . "'" |
| 328 |
); |
| 329 |
if (!isset($result['rows']) || !is_array($result['rows']) || !isset($result['rows'][0])) { |
| 330 |
return false; |
| 331 |
} |
| 332 |
$row = $result['rows'][0]; |
| 333 |
$found = is_array($row) ? reset($row) : $row; |
| 334 |
return $found === $tableName; |
| 335 |
} |
| 336 |
|
| 337 |
/** |
| 338 |
* Verify that a CREATE TABLE actually materialized the named table on disk. |
| 339 |
* Returns true if the table exists, false (and logs a per-table error) if not. |
| 340 |
* |
| 341 |
* Distinguishes silently-failing CREATEs from generic SQL errors so the |
| 342 |
* debug log identifies which specific DDL didn't materialize. Common causes: |
| 343 |
* concurrent DROP from a parallel cron, SQL parse error swallowed by |
| 344 |
* queryAndGetResults, prefix drift between request and table_prefix in |
| 345 |
* wp-config, or missing CREATE TABLE privileges on the DB user. |
| 346 |
* |
| 347 |
* Takes a single associative array (rather than two positional strings) |
| 348 |
* so the fully-qualified table name and the original placeholder -- |
| 349 |
* both plain strings -- cannot be silently transposed at the call site. |
| 350 |
* |
| 351 |
* @param array{tableName: string, placeholder: string} $context |
| 352 |
* tableName: Fully-qualified table name (with prefix). |
| 353 |
* placeholder: Original placeholder (e.g. "{wp_abj404_redirects}") for diagnostic context. |
| 354 |
* @return bool True if table exists post-CREATE, false otherwise. |
| 355 |
*/ |
| 356 |
private function verifyTableMaterialized(array $context): bool { |
| 357 |
$tableName = isset($context['tableName']) && is_string($context['tableName']) ? $context['tableName'] : ''; |
| 358 |
$placeholder = isset($context['placeholder']) && is_string($context['placeholder']) ? $context['placeholder'] : ''; |
| 359 |
if ($tableName === '') { |
| 360 |
return false; |
| 361 |
} |
| 362 |
// Shares tableExistsOnDisk()'s queryAndGetResults() probe (same pattern |
| 363 |
// as DatabaseUpgradeCollationDrift::correctCollations()) rather than a |
| 364 |
// raw $wpdb->get_var(), so this metadata probe carries the DAO's |
| 365 |
// query-timeout wrapper: a concurrent CREATE/ALTER/DROP racing this |
| 366 |
// freshly-run CREATE TABLE can hold a metadata lock that SHOW TABLES |
| 367 |
// waits on, and an unbounded wait here would block schema bootstrap |
| 368 |
// indefinitely instead of surfacing as a logged, recoverable error. |
| 369 |
if ($this->tableExistsOnDisk($tableName)) { |
| 370 |
return true; |
| 371 |
} |
| 372 |
$this->logger->errorMessage( |
| 373 |
"CREATE TABLE did not materialize '" . $tableName . "' " |
| 374 |
. "(placeholder " . $placeholder . "). " |
| 375 |
. "Table is still missing on disk after CREATE TABLE IF NOT EXISTS ran. " |
| 376 |
. "Likely causes: concurrent DROP from a parallel request, " |
| 377 |
. "SQL parse error suppressed by queryAndGetResults, " |
| 378 |
. "prefix mismatch between request and wp-config table_prefix, " |
| 379 |
. "or insufficient CREATE TABLE privileges on the DB user." |
| 380 |
); |
| 381 |
return false; |
| 382 |
} |
| 383 |
|
| 384 |
/** |
| 385 |
* @param string $createTableSql |
| 386 |
* @return string |
| 387 |
*/ |
| 388 |
public function applyPluginTableCharsetCollate($createTableSql) { |
| 389 |
global $wpdb; |
| 390 |
if (!is_string($createTableSql) || $createTableSql === '') { |
| 391 |
return $createTableSql; |
| 392 |
} |
| 393 |
|
| 394 |
// Always prefer utf8mb4 for plugin tables, regardless of site defaults. |
| 395 |
// The collation is normalized into the utf8mb4 family by the same |
| 396 |
// derivation every other producer uses, so the charset written below and |
| 397 |
// the collation written beside it can never name different families. |
| 398 |
$rawCollate = isset($wpdb->collate) && is_scalar($wpdb->collate) ? (string)$wpdb->collate : ''; |
| 399 |
$collate = ABJ_404_Solution_DatabaseCollationHelper::utf8mb4CollationOrFallback($rawCollate); |
| 400 |
|
| 401 |
$createTableSql = str_replace( |
| 402 |
array('{CHARSET}', '{COLLATION}'), |
| 403 |
array('utf8mb4', $collate), |
| 404 |
$createTableSql |
| 405 |
); |
| 406 |
// Already specified AS A TABLE OPTION? Then don't override. |
| 407 |
if (ABJ_404_Solution_CreateTableOptionsParser::declaresTableCharsetOrCollation($createTableSql)) { |
| 408 |
return $createTableSql; |
| 409 |
} |
| 410 |
|
| 411 |
return rtrim($createTableSql) . " DEFAULT CHARACTER SET utf8mb4 COLLATE {$collate}"; |
| 412 |
} |
| 413 |
} |
| 414 |
|
