The Hunt for a Red Spider: Conjunctive Query Determinacy Is Undecidable

The Hunt for a Red Spider: Conjunctive Query Determinacy Is Undecidable
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DOI:
10.1109/lics.2015.35
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发表时间:
2015-01
期刊:
2015 30th Annual ACM/IEEE Symposium on Logic in Computer Science
影响因子:
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通讯作者:
Tomasz Gogacz;J. Marcinkowski
Tomasz Gogacz;J. Marcinkowski
中科院分区:
其他
文献类型:
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作者:
Tomasz Gogacz;J. Marcinkowski

文献摘要

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我们在关系数据库理论中解决了一个众所周知的长期开放问题,表明连接性查询确定性问题(在其“无限制”版本中)是不可确定的。
We solve a well known, long-standing open problem in relational databases theory, showing that the conjunctive query determinacy problem (in its "unrestricted" version) is undecidable.