SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 2) ExpressionList (children 1) Function uniqMerge (children 1) ExpressionList (children 1) Identifier state TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Subquery (children 1) SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 3) ExpressionList (children 1) Function initializeAggregation (alias state) (children 1) ExpressionList (children 2) Literal \'uniqState\' Function modulo (children 1) ExpressionList (children 2) Identifier number Literal UInt64_3 TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) TableIdentifier system.numbers Literal UInt64_10000