java - How to do addAll from multiple sql result in hibernate? -


i'm running sql seperately, because hibernate doesn't support "union". how addall results.

public list<product> findlist(string pid) {      list <product> result1 ;       list <product> result2;       object[] obj = {pid};        result1.add(findallbyquery(product_division1,obj));       result1.add(findallbyquery(product_division2,obj));       return result1.addall(result1);   }  product_division1 = "query"; product_division2 = "query";

please advise.

return result1.addall(result1); doesn't make sense me, it's adding content of itself. 'add' method supposed used add 1 element only. list uninitialized.

what you're trying achieve sounds straight forward, need query each collection , combine it

list <product> result = findallbyquery(product_division1,obj); result.addall(findallbyquery(product_division2,obj) return result;

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