Using SQL Adapters with Ensemble - InterSystems Documentation

7Using SnapshotsThe EnsLib.SQL.Snapshot class represents a static object that you create and populate in various ways.The class provides methods for examining the data; more methods are available for this object thanfor the result set.This chapter describes how to use the EnsLib.SQL.Shapshot class. It discusses the following:• How to create a snapshot• How to get basic information about the snapshot• How to navigate the snapshot, row by row• How to get information about the current row of the snapshot• How to reset a snapshot7.1 Creating a SnapshotWhen you use the SQL inbound adapter, by default, you automatically receive snapshot objects withinyour business service. For each row in your query, the adapter creates a snapshot object and sends itas an argument when it calls the ProcessInput method of the business service. As noted previously,by default, this snapshot contains only a single row.You can create a snapshot and populate it in other ways. Some of these techniques were discussed inprevious chapters, but some are new to this chapter.Using SQL Adapters with Ensemble 53