SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 3) ExpressionList (children 3) Identifier col1 Identifier col2 Identifier col3 TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) TableIdentifier table_with_defaults_on_aliases Function equals (children 1) ExpressionList (children 2) Identifier col1 Literal UInt64_1