src/Db/Pgsql/PgConnection.php
private function addColumns($columns)
    {
        $this->columns     = $columns;
        $this->columnNames = array_map(function ($column) {
            return $column->name;
        }, $this->columns);
    }
private function addColumns($columns)
    {
        $this->columns     = $columns;
        $this->columnNames = array_map(function ($column) {
            return $column->name;
        }, $this->columns);
    }
Add Column information (from T)

@param $columns