Core Concepts > Query Execution
Execution Pipelines
When one of the execute methods (Execute or ExecuteAsync) is invoked on a query expression, an execution pipeline is created that manages the workflow and services used for assembly, execution, and conversion/mapping of data to and from the database. Execution pipelines are built directly on top of ADO.NET.
dbExpression is built directly on top of ADO.NET.
There are several execution pipeline types, a one-to-one with the SQL statement type:
| Execution pipeline type | SQL statement type |
|---|---|
ISelectQueryExpressionExecutionPipeline | SELECT |
IInsertQueryExpressionExecutionPipeline | INSERT |
IUpdateQueryExpressionExecutionPipeline | UPDATE |
IDeleteQueryExpressionExecutionPipeline | DELETE |
IStoredProcedureQueryExpressionExecutionPipeline | well, a stored procedure |