Online Documentation for SQL Manager for Oracle
Viewing query plan
Using SQL Manager for Oracle, you can view the plan for each of the queries created and executed in the application. The query plan is available within the corresponding Plan tab.
The Plan tab allows you to view the sequence of actions performed by the database server in the process of the query execution, and the amount of system resources used for the query execution.
The Operation panel below displays the operations as a tree list with the following columns: Operation (Operation, Options), Cost (Cost, CPU Cost, IO Cost, Est. Rows, Est. Bytes, Temp Space, bytes), Object (Database Link, Schema, Object Name, Alias, Object Type, Object Ord. Pos.), Other (Optimizer, Distribution, Start Position, Stop Position, Position ID, Search Columns, Access Predicates, Filter Predicates, Projection, Time, QB Lock Name, Data Tag, Data).
If necessary, you can specify that the Plan tab appears automatically upon query execution in Query Data: select the Explain query on execution option available within the Tools | Query Data section of the Environment Options dialog.