SelectWithUnionQuery (children 2) ExpressionList (children 1) SelectQuery (children 2) ExpressionList (children 1) Function greatCircleAngle (children 1) ExpressionList (children 4) Literal UInt64_0 Literal Int64_-9223372036854775808 Identifier number Identifier number TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Function numbers (children 1) ExpressionList (children 1) Literal UInt64_3 Identifier Null