公开(公告)号：US20240176781A1

公开(公告)日：2024-05-30

申请号：US18070751

申请日：2022-11-29

申请人： Oracle International Corporation

发明人： GIACOMO FABRIS ,  ALEKSEI KASHUBA ,  ALEXANDER ULRICH ,  JOSEF HAIDER ,  CHRISTIAN WIRTH

IPC分类号： G06F16/2453 ,  G06F11/34

CPC分类号： G06F16/24542 ,  G06F11/349 ,  G06F16/24537

摘要： Techniques are described to improve the performance of regular expression (regex) evaluation in a database management system (DBMS) by a speculative execution of a regex engine. In an embodiment, the DBMS determines properties of strings and generates descriptors for the string input data. Based on the descriptors, the regex engine validates an existing assertion for the execution logic to, at least in part, evaluate the regex pattern on the strings. Based on validating the existing assertion for selecting the execution logic, evaluating the regex pattern on the strings.