Oracle Coherence for C++ API
Release 3.7.1.0
E22845-01
#include <coherence/util/QueryRecord.hpp>
Inherits Object.
A QueryPlan.Step carries the recorded cost of evaluating a filter as part of a query operation.
This cost may be the estimated or actual execution cost depending on the type of the recorder in use when the step was created.
Public Types |
|
| typedef spec::Handle | Handle |
| Step Handle definition. | |
| typedef spec::View | View |
| Step View definition. | |
| typedef spec::Holder | Holder |
| Step Holder definition. | |
Public Member Functions |
|
| virtual String::View | getFilterDescription () const =0 |
| Get a description of the filter that was associated with this step during its creation. | |
| virtual Set::View | getIndexLookupRecords () const =0 |
| Get the recorded information about the index lookups performed during filter evaluation as part of a query record. | |
| virtual size32_t | getEfficiency () const =0 |
| Get the calculated cost of applying the filter as defined by calculateEffectiveness. | |
| virtual size32_t | getPreFilterKeySetSize () const =0 |
| Get the size of the key set prior to evaluating the filter or applying an index. | |
| virtual size32_t | getPostFilterKeySetSize () const =0 |
| Get the size of the key set remaining after evaluating the filter or applying an index. | |
| virtual int64_t | getDuration () const =0 |
| Get the amount of time (in ms) spent evaluating the filter or applying an index for this query plan step. | |
| virtual List::View | getSteps () const =0 |
| Return inner nested steps, may be null if not nested. | |
| virtual String::View getFilterDescription | ( | ) | const [pure virtual] |
| virtual Set::View getIndexLookupRecords | ( | ) | const [pure virtual] |
Get the recorded information about the index lookups performed during filter evaluation as part of a query record.
| virtual size32_t getEfficiency | ( | ) | const [pure virtual] |
Get the calculated cost of applying the filter as defined by calculateEffectiveness.
| virtual size32_t getPreFilterKeySetSize | ( | ) | const [pure virtual] |
Get the size of the key set prior to evaluating the filter or applying an index.
This value can be used together with getPostFilterKeySetSize() to calculate an actual effectiveness (reduction of the key set) for this filter step.
| virtual size32_t getPostFilterKeySetSize | ( | ) | const [pure virtual] |
Get the size of the key set remaining after evaluating the filter or applying an index.
This value can be used together with getPreFilterKeySetSize() to calculate an actual effectiveness (reduction of the key set) for this filter step.
| virtual int64_t getDuration | ( | ) | const [pure virtual] |
| virtual List::View getSteps | ( | ) | const [pure virtual] |
Return inner nested steps, may be null if not nested.
The documentation for this class was generated from the following file: