Finally , makes good use of distributed database paralleling processing advantage and major recursive forms are single linear recursive forms and single recursive can turn into a union form n chain recursive . it introduces a / v _ chain recursive query algorithms with paralleling processing to show ddb " s insurance 最后,借鑒了分布式數(shù)據(jù)庫并行處理的優(yōu)勢和多數(shù)遞歸形式是單線性遞歸形式的共識以及單線遞歸都可以轉(zhuǎn)化為一種共同形式? n鏈遞歸,介紹了演繹數(shù)據(jù)庫系統(tǒng)遞歸查詢算法?并行處理的n鏈遞歸查詢算法,以示ddb的可靠性。