公开(公告)号：US20250021531A1

公开(公告)日：2025-01-16

申请号：US18900853

申请日：2024-09-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ji Sun ,  Shifu Li ,  Shujie Zhang ,  Guoliang Li

IPC: G06F16/21 ,  G06N5/022

Abstract: A cardinality estimation method and an apparatus are provided. The method includes: selecting a target model type from a plurality of model types based on a target distribution feature and mapping relationship information, where the mapping relationship information includes a mapping relationship between the plurality of model types and a predicted distribution feature, and the target distribution feature is extracted from sample data collected based on an analysis instruction; and obtaining, based on the target model type, a target model corresponding to the target model type, where the target model is used to perform cardinality estimation on a query instruction of a database.