SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 2) ExpressionList (children 6) Function sum (children 1) ExpressionList (children 1) Function plus (children 1) ExpressionList (children 2) Identifier a Literal UInt64_1 Function sum (children 1) ExpressionList (children 1) Function plus (children 1) ExpressionList (children 2) Identifier b Literal UInt64_1 Function sum (children 1) ExpressionList (children 1) Function plus (children 1) ExpressionList (children 2) Identifier c Literal UInt64_1 Function sumWithOverflow (children 1) ExpressionList (children 1) Function plus (children 1) ExpressionList (children 2) Identifier a Literal UInt64_1 Function sumWithOverflow (children 1) ExpressionList (children 1) Function plus (children 1) ExpressionList (children 2) Identifier b Literal UInt64_1 Function sumWithOverflow (children 1) ExpressionList (children 1) Function plus (children 1) ExpressionList (children 2) Identifier c Literal UInt64_1 TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) TableIdentifier decimal