SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 3) ExpressionList (children 1) Literal UInt64_112 TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) TableIdentifier test54378 Function in (children 1) ExpressionList (children 2) Identifier part_date Literal \'2018-04-19\'