SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 4) ExpressionList (children 1) Function count (children 1) ExpressionList TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) TableIdentifier tbl Function equals (children 1) ExpressionList (children 2) Function tupleElement (children 1) ExpressionList (children 2) Identifier _partition_value Literal UInt64_3 Literal UInt64_4 Set