/AWS1/CL_NEDSTATISTICS¶
Contains statistics information. The DFE engine uses information about the data in your Neptune graph to make effective trade-offs when planning query execution. This information takes the form of statistics that include so-called characteristic sets and predicate statistics that can guide query planning. See Managing statistics for the Neptune DFE to use.
CONSTRUCTOR¶
IMPORTING¶
Optional arguments:¶
iv_autocompute TYPE /AWS1/NEDBOOLEAN /AWS1/NEDBOOLEAN¶
Indicates whether or not automatic statistics generation is enabled.
iv_active TYPE /AWS1/NEDBOOLEAN /AWS1/NEDBOOLEAN¶
Indicates whether or not DFE statistics generation is enabled at all.
iv_statisticsid TYPE /AWS1/NEDSTRING /AWS1/NEDSTRING¶
Reports the ID of the current statistics generation run. A value of -1 indicates that no statistics have been generated.
iv_date TYPE /AWS1/NEDTIMESTAMP /AWS1/NEDTIMESTAMP¶
The UTC time at which DFE statistics have most recently been generated.
iv_note TYPE /AWS1/NEDSTRING /AWS1/NEDSTRING¶
A note about problems in the case where statistics are invalid.
io_signatureinfo TYPE REF TO /AWS1/CL_NEDSTATISTICSSUMMARY /AWS1/CL_NEDSTATISTICSSUMMARY¶
A StatisticsSummary structure that contains:
signatureCount- The total number of signatures across all characteristic sets.
instanceCount- The total number of characteristic-set instances.
predicateCount- The total number of unique predicates.
Queryable Attributes¶
autoCompute¶
Indicates whether or not automatic statistics generation is enabled.
Accessible with the following methods¶
| Method | Description |
|---|---|
GET_AUTOCOMPUTE() |
Getter for AUTOCOMPUTE, with configurable default |
ASK_AUTOCOMPUTE() |
Getter for AUTOCOMPUTE w/ exceptions if field has no value |
HAS_AUTOCOMPUTE() |
Determine if AUTOCOMPUTE has a value |
active¶
Indicates whether or not DFE statistics generation is enabled at all.
Accessible with the following methods¶
| Method | Description |
|---|---|
GET_ACTIVE() |
Getter for ACTIVE, with configurable default |
ASK_ACTIVE() |
Getter for ACTIVE w/ exceptions if field has no value |
HAS_ACTIVE() |
Determine if ACTIVE has a value |
statisticsId¶
Reports the ID of the current statistics generation run. A value of -1 indicates that no statistics have been generated.
Accessible with the following methods¶
| Method | Description |
|---|---|
GET_STATISTICSID() |
Getter for STATISTICSID, with configurable default |
ASK_STATISTICSID() |
Getter for STATISTICSID w/ exceptions if field has no value |
HAS_STATISTICSID() |
Determine if STATISTICSID has a value |
date¶
The UTC time at which DFE statistics have most recently been generated.
Accessible with the following methods¶
| Method | Description |
|---|---|
GET_DATE() |
Getter for DATE, with configurable default |
ASK_DATE() |
Getter for DATE w/ exceptions if field has no value |
HAS_DATE() |
Determine if DATE has a value |
note¶
A note about problems in the case where statistics are invalid.
Accessible with the following methods¶
| Method | Description |
|---|---|
GET_NOTE() |
Getter for NOTE, with configurable default |
ASK_NOTE() |
Getter for NOTE w/ exceptions if field has no value |
HAS_NOTE() |
Determine if NOTE has a value |
signatureInfo¶
A StatisticsSummary structure that contains:
signatureCount- The total number of signatures across all characteristic sets.
instanceCount- The total number of characteristic-set instances.
predicateCount- The total number of unique predicates.
Accessible with the following methods¶
| Method | Description |
|---|---|
GET_SIGNATUREINFO() |
Getter for SIGNATUREINFO |