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#include "yql_cost_function.h"
namespace NYql {
bool NDq::operator < (const NDq::TJoinColumn& c1, const NDq::TJoinColumn& c2) {
if (c1.RelName < c2.RelName){
return true;
} else if (c1.RelName == c2.RelName) {
return c1.AttributeName < c2.AttributeName;
}
return false;
}
} // namespace NYql
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