1 files changed, 30 insertions, 0 deletions
diff --git a/lib/public/DB/QueryBuilder/IFunctionBuilder.php b/lib/public/DB/QueryBuilder/IFunctionBuilder.php
index 861a576914a..d82d3ada8cf 100644
--- a/lib/public/DB/QueryBuilder/IFunctionBuilder.php
+++ b/lib/public/DB/QueryBuilder/IFunctionBuilder.php
@@ -109,6 +109,8 @@ interface IFunctionBuilder {
 	/**
 	 * Takes the maximum of all rows in a column
 	 *
+	 * If you want to get the maximum value of multiple columns in the same row, use `greatest` instead
+	 *
 	 * @param mixed $field the column to maximum
 	 *
 	 * @return IQueryFunction
@@ -119,10 +121,38 @@ interface IFunctionBuilder {
 	/**
 	 * Takes the minimum of all rows in a column
 	 *
+	 * If you want to get the minimum value of multiple columns in the same row, use `least` instead
+	 *
 	 * @param mixed $field the column to minimum
 	 *
 	 * @return IQueryFunction
 	 * @since 18.0.0
 	 */
 	public function min($field);
+
+	/**
+	 * Takes the maximum of multiple values
+	 *
+	 * If you want to get the maximum value of all rows in a column, use `max` instead
+	 *
+	 * @param mixed $x the first input field or number
+	 * @param mixed $y the first input field or number
+	 *
+	 * @return IQueryFunction
+	 * @since 18.0.0
+	 */
+	public function greatest($x, $y);
+
+	/**
+	 * Takes the minimum of multiple values
+	 *
+	 * If you want to get the minimum value of all rows in a column, use `min` instead
+	 *
+	 * @param mixed $x the first input field or number
+	 * @param mixed $y the first input field or number
+	 *
+	 * @return IQueryFunction
+	 * @since 18.0.0
+	 */
+	public function least($x, $y);
 }