Sap Se

Boyeong Jeon

Sanghee Lee

Sung Gun Lee

Hyung Jo Yoon

JunGyoung Seong

Jaeyeon Won

Chanho Jeong

Kiyoung Kim

A method for intelligent query plan cache size management can be implemented. During execution of a plurality of incoming queries in a database management system, the method can measure actual compilation times of generating query execution plans for the plurality of incoming queries. The database management system can have a query execution plan cache which has a size that can store at least some of the query execution plans. The method can monitor differences between the actual compilation times and ideal compilation times of generating query execution plans for the plurality of incoming queries. The ideal compilation times can be estimated by assuming no query execution plan is evicted from the query execution plan cache. The method can adjust the size of the query execution plan cache based on the monitored differences.

Intelligent query plan cache size management

A computer-implemented method can measure query locality during execution of a plurality of incoming queries in a database management system. The database management system includes a query execution plan cache which has a size that can store at least some of query execution plans generated for the plurality of incoming queries. Based on the measured query locality, the method can adjust the size of the query execution plan cache.

According to some embodiments, a system to manage a query plan cache for a Database Management System ('DBMS') includes a DBMS query plan cache data store. The DBMS query plan cache data store may contain, for example, electronic records representing a plurality of query plans each associated with a set of instructions created in response to a query previously submitted by a user. A DBMS query plan cache management platform may then calculate a utility score for each query plan in the DBMS query plan cache data store. At least one query plan may be evicted from the DBMS query plan cache data store based on the calculated utility score, wherein the evicting is not based on a size of the DBMS query plan cache.

Database management system query plan cache management

In one embodiment, the present disclosure pertains to automated data type determination of variables that are written in a programming language. In one embodiment, a programming language statement is received. The programming language statement includes a variable, an expression to which the variable is set, and a request to determine a data type of the variable. The expression is processed to deduce a data type of the expression. In certain embodiments, the data type of the expression is then assigned as the data type of the variable such that the data type can be used when the programming language statement is compiled into machine executable code.

Growing community of inventors

Seoul, South Korea

Boyeong Jeon