Concepts → Incorta Analyzer Table Column
An Incorta Analyzer table column has configurable and static properties. The following are the properties of an Incorta Analyzer table column:
|Show in Analyzer||checkbox||Select to show as a selectable column in the Data Panel|
|Name||read only||The column’s name; used in the fully qualified name of the column|
|Label||read only||A user friendly name. The label for an Incorta Analyzer table column is defined in the column properties of the Analyzer.|
|Type||read only||The data type of the column. The data type of a column in an Incorta Analyzer table is determined by the source column.|
|Function||drop down list||Select the Incorta Function of the column|
|Encrypt||drop down list||Select if the column is encrypted in shared storage|
As a referenced column, the type property of an Incorta Analyzer table column is an immutable property. If the type property of a physical schema table column is changed, it will affect the referenced column in the Incorta Analyzer table. If the type property is changed to a type that can not be properly type casted, you may need to recreate the Incorta Analyzer table.
The function property of an Incorta Analyzer table column not only determines how the Loader Service stores data for the column, but also influences how tools such as the Analyzer assign a specific behavior to the column. An Incorta Analyzer table column can only function as a measure or a dimension. If you use a column from your physical schema table that functions as a key, the Incorta Analyzer table will convert the function of the column. The conversion is based on how you assign the column in the Analyzer when building the Incorta Analyzer table.
When you create the Incorta Analyzer table, the function of the column is determined by the Analyzer tray you have added the column to (grouping dimension or measure).
If you edit the Incorta Analyzer table and change the column function in the Analyzer, you will need to manually update the column function in the Table Editor.
A dimension categorizes, describes, or groups data. Examples of a dimension column are State, Year, or City. Dimension columns do not require unique values.
A dimension column has an associated behavior in the Analyzer. When a user double-clicks a dimension column in the Data panel, the Analyzer automatically adds the column to the Grouping Dimension tray in the Insight panel.
A measure is a measurement of data. Examples of a measure column are Revenue, Quantity, and Cost.
A measure column has an associated behavior in the Analyzer. When a user double-clicks a measure column in the Data panel, the Analyzer automatically adds the column to the Measure tray in the Insight panel.
Using the Table Editor, you can explicitly specify a column to be encrypted.
For the given table, the Loader Service extracts the unencrypted values from the data source and writes the encrypted values in shared storage in Apache Parquet file format. When reading the Apache Parquet files for the given table, the Analytics Service decrypts the encrypted column values.
The encryption property for an Incorta Analytics table column should be set to false, as there is no corresponding Apache Parquet file associated with the table.
When creating an Incorta Analyzer table, you are able to access the business schema as a data source for an Incorta Analyzer table. There are several cases you should be aware of when utilizing entities in the business schema view as a data source.
An Incorta Analyzer table is one of the last tables loaded during a schema load. As a result, if the Incorta Analyzer table is referencing a business schema view column that references an entity that loads at the same time or later than the Incorta Analyzer table, it will cause the load to fail or the Incorta Analyzer table to error when attempting to display values. As an example, an Incorta SQL table is also loaded at the end of a schema load. If the Incorta Analyzer table references a business schema view that references a Incorta SQL table the load will fail. The same issue will occur if the business schema view is referencing another Incorta Analyzer table.
A business schema view column can reference an Incorta Analyzer table. The same Incorta Analyzer table can reference the same business schema view column. These types of cyclical dependencies will cause errors and should be avoided.
The value of a session variable is calculated at runtime. If an Incorta Analyzer table references a business schema view column that is referencing a session variable, the value of the session variable in the Incorta Analyzer table will be calculated at load time. Avoid making this reference as the session variable’s value may change between a physical schema load.