2 files changed, 28 insertions, 0 deletions
diff --git a/lib/private/DB/QueryBuilder/FunctionBuilder/FunctionBuilder.php b/lib/private/DB/QueryBuilder/FunctionBuilder/FunctionBuilder.php
index a9d2f6f9a35..3b67661c8b0 100644
--- a/lib/private/DB/QueryBuilder/FunctionBuilder/FunctionBuilder.php
+++ b/lib/private/DB/QueryBuilder/FunctionBuilder/FunctionBuilder.php
@@ -76,4 +76,12 @@ class FunctionBuilder implements IFunctionBuilder {
 		$alias = $alias ? (' AS ' . $this->helper->quoteColumnName($alias)) : '';
 		return new QueryFunction('COUNT(' . $this->helper->quoteColumnName($count) . ')' . $alias);
 	}
+
+	public function max($field) {
+		return new QueryFunction('MAX(' . $this->helper->quoteColumnName($field) . ')');
+	}
+
+	public function min($field) {
+		return new QueryFunction('MIN(' . $this->helper->quoteColumnName($field) . ')');
+	}
 }
diff --git a/lib/public/DB/QueryBuilder/IFunctionBuilder.php b/lib/public/DB/QueryBuilder/IFunctionBuilder.php
index 1e17290f145..066be470150 100644
--- a/lib/public/DB/QueryBuilder/IFunctionBuilder.php
+++ b/lib/public/DB/QueryBuilder/IFunctionBuilder.php
@@ -105,4 +105,24 @@ interface IFunctionBuilder {
 	 * @since 14.0.0
 	 */
 	public function count($count, $alias = '');
+
+	/**
+	 * Takes the maximum of all rows in a column
+	 *
+	 * @param mixed $field the column to maximum
+	 *
+	 * @return IQueryFunction
+	 * @since 18.0.0
+	 */
+	public function max($field);
+
+	/**
+	 * Takes the minimum of all rows in a column
+	 *
+	 * @param mixed $field the column to minimum
+	 *
+	 * @return IQueryFunction
+	 * @since 18.0.0
+	 */
+	public function min($field);
 }