Explain EXPLAIN SYNTAX (children 1) SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 3) ExpressionList (children 1) Asterisk TablesInSelectQuery (children 2) TablesInSelectQueryElement (children 1) TableExpression (children 1) Subquery (children 1) SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 1) ExpressionList (children 2) Literal UInt64_1 (alias id) Literal UInt64_2 (alias value) TablesInSelectQueryElement (children 2) TableExpression (children 1) Subquery (children 1) SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 1) ExpressionList (children 2) Literal UInt64_1 (alias id) Literal UInt64_3 (alias value_1) TableJoin (children 1) ExpressionList (children 1) Identifier id Function equals (children 1) ExpressionList (children 2) Function arrayMap (children 1) ExpressionList (children 2) Function lambda (children 1) ExpressionList (children 2) Function tuple (children 1) ExpressionList (children 1) Identifier x Function plus (children 1) ExpressionList (children 2) Function plus (children 1) ExpressionList (children 2) Identifier x Identifier value Identifier value_1 Literal Array_[UInt64_1] Literal Array_[UInt64_6]