SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 2) ExpressionList (children 2) Literal \'no_transaction_target\' Function less (children 1) ExpressionList (children 2) Function count (children 1) ExpressionList Literal UInt64_10000 TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) TableIdentifier target