query plan造句

Classical query optimization associates each query plan with one scalar cost value.
This yields a set of relevant query plans.
Once a query plan is generated for a query, it is temporarily cached.
In the next step, the declarative query is translated into a logical query plan.
Parametric query optimization assumes that query plan cost depends on parameters whose values are unknown at optimization time.
It's difficult to find query plan in a sentence. 用query plan造句挺难的

There are often other cost metrics in addition to execution time that are relevant to compare query plans.
The consequence of this is that a different query plan is compiled and stored for each different length.
It can be used to visually observe and analyze query plans and optimize the database performance, among others.
A query plan is a directed graph where the nodes are operators and the edges describe the processing flow.
Each operator in the query plan encapsulates the semantic of a specific operation, such as filtering or aggregation.
Therefore, a DSMS needs some plan migration strategies to replace a running query plan with a new one.
Drill's datastore-aware optimizer automatically restructures a query plan to leverage the datastore's internal processing capabilities.
The database translates the query into a " query plan " which may vary between executions, database versions and database software.
Those extended problem variants differ in how they model the cost of single query plans and in terms of their optimization goal.
The goal of optimization is usually to generate all query plans that could be optimal for any of the possible parameter value combinations.

更多例句：下一页