This document discusses query processing and outlines several models including query plan, iterator model, materialization model, and vectorization model which are approaches used to process queries in a database.
The document discusses concurrency control techniques for indexes including locks versus latches, latch modes, latch crabbing/coupling, examples of using latches for DELETE and INSERT operations, and a better latching algorithm.
This document discusses query processing and outlines several models including query plan, iterator model, materialization model, and vectorization model which are approaches used to process queries in a database.
The document discusses concurrency control techniques for indexes including locks versus latches, latch modes, latch crabbing/coupling, examples of using latches for DELETE and INSERT operations, and a better latching algorithm.
Breadth first search is a technique for exploring all neighboring nodes of a graph before moving to nodes farther away. It begins by exploring all nodes connected to the starting node by a single edge, then all nodes that are two edges away, and so on layer by layer until no new nodes can be added. The numbers in the document represent a graph being explored using breadth first search, with nodes being visited in order of their distance from the starting point.
Breadth first search is a technique for exploring all neighboring nodes of a graph before moving to nodes farther away. It begins by exploring all nodes connected to the starting node by a single edge, then all nodes that are two edges away, and so on layer by layer until no new nodes can be added. The numbers in the document represent a graph being explored using breadth first search, with nodes being visited in order of their distance from the starting point.