SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 3) ExpressionList (children 1) Identifier _part TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) TableIdentifier test_not_found_column_nothing Function equals (children 1) ExpressionList (children 2) Identifier col001 Literal UInt64_0