| 发明名称 |
Cost-based subquery correlation and decorrelation |
| 摘要 |
Techniques are provided that determine that a query includes at least one subquery that may be correlated or decorrelated. An internal representation of the query that represents the subquery in both correlated and decorrelated form is generated, wherein the internal representation includes at least one virtual table.
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| 申请公布号 |
US2006287979(A1) |
申请公布日期 |
2006.12.21 |
| 申请号 |
US20050156500 |
申请日期 |
2005.06.17 |
| 申请人 |
BEAVIN THOMAS A;CAI MENGCHU;CHEN YAO-CHING S;CHENG HSIUYING Y;LIN FEN-LING;LIU IRENE C;MUKAI JERRY;NI DEMAI;TSUJI YOICHI;XIA LI;ZENG YING |
发明人 |
BEAVIN THOMAS A.;CAI MENGCHU;CHEN YAO-CHING S.;CHENG HSIUYING Y.;LIN FEN-LING;LIU IRENE C.;MUKAI JERRY;NI DEMAI;TSUJI YOICHI;XIA LI;ZENG YING |
| 分类号 |
G06F17/30 |
主分类号 |
G06F17/30 |
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