memories/lib/Db/AddMissingIndices.php

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<?php
namespace OCA\Memories\Db;
use OC\DB\SchemaWrapper;
use OCP\Migration\IOutput;
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class AddMissingIndices
{
/**
* Add missing indices to the database schema.
*/
public static function run(IOutput $output): SchemaWrapper
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{
$connection = \OC::$server->get(\OC\DB\Connection::class);
$schema = new SchemaWrapper($connection);
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// Should migrate at end
$ops = [];
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// Speed up CTE lookup for subdirectories
if ($schema->hasTable('filecache')) {
$table = $schema->getTable('filecache');
if (!$table->hasIndex('memories_parent_mimetype')) {
$table->addIndex(['parent', 'mimetype'], 'memories_parent_mimetype');
$ops[] = 'filecache::memories_parent_mimetype';
}
}
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// Add index on systemtag_object_mapping to speed up the query
if ($schema->hasTable('systemtag_object_mapping')) {
$table = $schema->getTable('systemtag_object_mapping');
if (!$table->hasIndex('memories_type_tagid')) {
$table->addIndex(['objecttype', 'systemtagid'], 'memories_type_tagid');
$ops[] = 'systemtag_object_mapping::memories_type_tagid';
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}
}
// Add index on recognize detections for file id to speed up joins
if ($schema->hasTable('recognize_face_detections')) {
$table = $schema->getTable('recognize_face_detections');
// Starting at some version, recognize ships an index on file_id
// In that case, we *remove* the memories index if it exists
$hasOwn = $table->hasIndex('recognize_facedet_file');
$hasOur = $table->hasIndex('memories_file_id');
if (!$hasOwn && !$hasOur) {
// Add our index because none exists
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$table->addIndex(['file_id'], 'memories_file_id');
$ops[] = 'recognize_face_detections::memories_file_id';
} elseif ($hasOwn && $hasOur) {
// Remove our index because recognize has one
$table->dropIndex('memories_file_id');
$ops[] = '-recognize_face_detections::memories_file_id';
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}
}
// Migrate
if (\count($ops) > 0) {
$output->info('Updating external table schema: '.implode(', ', $ops));
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$connection->migrateToSchema($schema->getWrappedSchema());
} else {
$output->info('External table schema seem up to date');
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}
return $schema;
}
}