Merge pull request #17833 from nextcloud/propagator-no-negative-sizes

dont set folder size to negative values during propagation

3 files changed, 22 insertions, 2 deletions

diff --git a/lib/private/DB/QueryBuilder/FunctionBuilder/FunctionBuilder.php b/lib/private/DB/QueryBuilder/FunctionBuilder/FunctionBuilder.php
index 46bb536dfd2..ffa758e4da7 100644
--- a/lib/private/DB/QueryBuilder/FunctionBuilder/FunctionBuilder.php
+++ b/lib/private/DB/QueryBuilder/FunctionBuilder/FunctionBuilder.php
@@ -85,4 +85,12 @@ class FunctionBuilder implements IFunctionBuilder {
 	public function min($field) {
 		return new QueryFunction('MIN(' . $this->helper->quoteColumnName($field) . ')');
 	}
+
+	public function greatest($x, $y) {
+		return new QueryFunction('GREATEST(' . $this->helper->quoteColumnName($x) . ', ' . $this->helper->quoteColumnName($y) . ')');
+	}
+
+	public function least($x, $y) {
+		return new QueryFunction('LEAST(' . $this->helper->quoteColumnName($x) . ', ' . $this->helper->quoteColumnName($y) . ')');
+	}
 }
diff --git a/lib/private/DB/QueryBuilder/FunctionBuilder/SqliteFunctionBuilder.php b/lib/private/DB/QueryBuilder/FunctionBuilder/SqliteFunctionBuilder.php
index 21898cf3f93..f37ac20ecab 100644
--- a/lib/private/DB/QueryBuilder/FunctionBuilder/SqliteFunctionBuilder.php
+++ b/lib/private/DB/QueryBuilder/FunctionBuilder/SqliteFunctionBuilder.php
@@ -30,4 +30,13 @@ class SqliteFunctionBuilder extends FunctionBuilder {
 	public function concat($x, $y) {
 		return new QueryFunction('(' . $this->helper->quoteColumnName($x) . ' || ' . $this->helper->quoteColumnName($y) . ')');
 	}
+
+	public function greatest($x, $y) {
+		return new QueryFunction('MAX(' . $this->helper->quoteColumnName($x) . ', ' . $this->helper->quoteColumnName($y) . ')');
+	}
+
+	public function least($x, $y) {
+		return new QueryFunction('MIN(' . $this->helper->quoteColumnName($x) . ', ' . $this->helper->quoteColumnName($y) . ')');
+	}
+
 }
diff --git a/lib/private/Files/Cache/Propagator.php b/lib/private/Files/Cache/Propagator.php
index 989a4d0c7d5..41b4c2bb070 100644
--- a/lib/private/Files/Cache/Propagator.php
+++ b/lib/private/Files/Cache/Propagator.php
@@ -91,7 +91,7 @@ class Propagator implements IPropagator {
 		}, $parentHashes);
 
 		$builder->update('filecache')
-			->set('mtime', $builder->createFunction('GREATEST(' . $builder->getColumnName('mtime') . ', ' . $builder->createNamedParameter((int)$time, IQueryBuilder::PARAM_INT) . ')'))
+			->set('mtime', $builder->func()->greatest('mtime', $builder->createNamedParameter((int)$time, IQueryBuilder::PARAM_INT)))
 			->set('etag', $builder->createNamedParameter($etag, IQueryBuilder::PARAM_STR))
 			->where($builder->expr()->eq('storage', $builder->createNamedParameter($storageId, IQueryBuilder::PARAM_INT)))
 			->andWhere($builder->expr()->in('path_hash', $hashParams));
@@ -102,7 +102,10 @@ class Propagator implements IPropagator {
 			// we need to do size separably so we can ignore entries with uncalculated size
 			$builder = $this->connection->getQueryBuilder();
 			$builder->update('filecache')
-				->set('size', $builder->func()->add('size', $builder->createNamedParameter($sizeDifference)))
+				->set('size', $builder->func()->greatest(
+					$builder->createNamedParameter(-1, IQueryBuilder::PARAM_INT),
+					$builder->func()->add('size', $builder->createNamedParameter($sizeDifference)))
+				)
 				->where($builder->expr()->eq('storage', $builder->createNamedParameter($storageId, IQueryBuilder::PARAM_INT)))
 				->andWhere($builder->expr()->in('path_hash', $hashParams))
 				->andWhere($builder->expr()->gt('size', $builder->expr()->literal(-1, IQueryBuilder::PARAM_INT)));