Fixed return types on aggregation functions

src/Database/Table/GroupedSelection.php

@@ -89,7 +89,10 @@ public function order(string $columns, ...$params)
 	/********************* aggregations ****************d*g**/
 
 
-	public function aggregation(string $function): int
+	/**
+	 * @return mixed
+	 */
+	public function aggregation(string $function)
 	{
 		$aggregation = &$this->getRefTable($refPath)->aggregation[$refPath . $function . $this->sqlBuilder->getSelectQueryHash($this->getPreviousAccessedColumns())];
 

src/Database/Table/Selection.php

@@ -462,8 +462,9 @@ public function alias(string $tableChain, string $alias)
 	/**
 	 * Executes aggregation function.
 	 * @param  string select call in "FUNCTION(column)" format
+	 * @return mixed
 	 */
-	public function aggregation(string $function): int
+	public function aggregation(string $function)
 	{
 		$selection = $this->createSelectionInstance();
 		$selection->getSqlBuilder()->importConditions($this->getSqlBuilder());
@@ -490,26 +491,29 @@ public function count(string $column = NULL): int
 
 	/**
 	 * Returns minimum value from a column.
+	 * @return mixed
 	 */
-	public function min(string $column): int
+	public function min(string $column)
 	{
 		return $this->aggregation("MIN($column)");
 	}
 
 
 	/**
 	 * Returns maximum value from a column.
+	 * @return mixed
 	 */
-	public function max(string $column): int
+	public function max(string $column)
 	{
 		return $this->aggregation("MAX($column)");
 	}
 
 
 	/**
 	 * Returns sum of values in a column.
+	 * @return mixed
 	 */
-	public function sum(string $column): int
+	public function sum(string $column)
 	{
 		return $this->aggregation("SUM($column)");
 	}