QryLogFeatureUseCountV provides use counts based on the current data in DBC.DBQLogTbl.
The QryLogFeatureUseCountV view is populated if the WITH FEATUREINFO option for BEGIN/REPLACE QUERY LOGGING and this view (QryLogFeatureUseCountV) is included in a request. QryLogFeatureUseCountV provides a view into the FeatureUsage column of DBQLogTbl and the QryLogFeatureListV view.
Specific and Generic Feature Names
The feature list includes specific feature names and, in certain cases, generic feature names. The generic feature name is logged when any of the corresponding specific feature names is logged. Not all specific features have a corresponding generic feature group. The following table is a partial list of specific feature names with corresponding generic feature names.
The list below is provided as an example of specific and generic feature grouping, but is not a complete list of features. The features list and the grouping of features is subject to change.
| Specific Feature Name | Generic Feature Name |
|---|---|
| 24 Teradata Columnar | 109 Column Partitioning |
| 27 Multi Level Partitioning | 26 Row Partitioning |
| 28 8 Byte Partitioning | |
| 29 2 Byte Partitioning | |
| 30 Column Partitioning and Row Partitioning | 26 Row Partitioning, 109 Column Partitioning |
| 31 Column-Partitioned and a NoPI | 109 Column Partitioning |
| 32 Column-Partitioned and a PI | |
| 33 Column-Partitioned and a PA | |
| 42 XML Data Type | 41 User Defined Type |
| 43 JSON Data Type | |
| 44 Distinct Data Type | |
| 45 Structure Data Type | |
| 46 Geospatial | |
| 47 3D Geospatial | |
| 48 Period Data Type | |
| 49 Array Data Type | |
| 50 Number Data Type | |
| 104 Aggregation Push for Union All | 110 Union All Pushdown |
| 105 Binary Join Push for Union All |
Example: Using QryLogFeatureUseCountV
The example generates a report on feature usage.
SELECT cast(featurename as CHAR(50)) as FEATURENAME, FEATUREUSECOUNT FROM DBC.QryLogFeatureUseCountV order by 2 desc;
Result:
FEATURENAME FEATUREUSECOUNT -------------------------------- --------------- Block Level Compression 8371 Primary Index 8371 Hashed Table 8371 SET Table 7366 Non Unique Hashed Index 6018 Fallback 3298 Unique Hashed Index 3016 Parameterized Query 1911 Partition Level Locking 1659 Secondary Index 1230 Teradata Stored Procedure 1174 [...] Autoreparse 15 User Defined Function 11 Join Index 8 Bit Manipulation Function 5 Fast Path Function 5 MloadX 0 [...]