FireDAC.Phys.MongoDBWrapper.TMongoPipeline.TProjection.Exp
Delphi
function Exp(const AField, AExpression: String): TProjection;
C++
TMongoPipeline::TProjection* __fastcall Exp(const System::UnicodeString AField, const System::UnicodeString AExpression);
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| function | public | FireDAC.Phys.MongoDBWrapper.pas FireDAC.Phys.MongoDBWrapper.hpp |
FireDAC.Phys.MongoDBWrapper | TProjection |
Description
Adds the calculated attribute AField to the projection stage, and returns a reference to this projection stage.
Use this method to add the calculated attribute AField to the projection stage. The AField attribute is calculated using the JSON expression AExpression.