Database Connection
Source Geodatabase
Select the sde Geodatabase source file.
Constraints
Tables
After specifying the database connection, click the Browse button (...) to select tables for import. A connection window appears while the system retrieves the tables from the database.
Once the Select Tables dialog appears, you can select one or more tables. Click OK to dismiss the window and add the selected table name(s) to the Tables parameter.
WHERE Clause
An SQL WHERE clause can be applied to the selected tables, to constrain the the row selection in tables chosen in the table list (for example, NUMLANES=2).
Schema Attributes
Additional Attributes to Expose
Use this parameter to expose Format Attributes in Workbench when you create a workspace:
- In a dynamic scenario, it means these attributes can be passed to the output dataset at runtime.
- In a non-dynamic scenario, this parameter allows you to expose additional attributes on multiple feature types. Click the browse button to view the available format attributes (which are different for each format) for the reader.
Alias Mode
This parameter controls how Geodatabase aliases are used.
- None: Aliases are ignored.
- Replace Attribute Names with Aliases: (Only applicable when adding a Reader.) Attributes on feature types will be named for their aliases rather than their official names. A geodb_feature_class_alias attribute will be included on each feature. Use this mode when the target format should create feature types using the aliases as attribute names.
- Expose Aliases as Metadata Attributes: For each attribute read, a second <name>_alias attribute will be added that stores the alias for the attribute in question. A geodb_feature_class_alias attribute will also be included on each feature. Use this mode when the target format is Geodatabase and the aliases should be preserved during feature class and table creation.
Use Search Envelope
Using the minimum and maximum x and y parameters, define a bounding box that will be used to filter the input features. Only features that intersect with the bounding box are returned.
If all four coordinates of the search envelope are specified as 0, the search envelope will be disabled.
Clip to Search Envelope
When selected, this parameter removes any portions of imported features being read that are outside the Search Envelope.
The example below illustrates the results of the Search Envelope when Clip to Search Envelope is not selected (set to No) and when it is selected (set to Yes).
- No: Any features that cross the search envelope boundary will be read, including the portion that lies outside of the boundary.
- Yes: Any features that cross the search envelope boundary will be clipped at the boundary, and only the portion that lies inside the boundary will be read. The underlying function for the Clip to Search Envelope function is an intersection; however, when Clip to Search Envelope is selected, a clipping operation is also performed in addition to the intersection.
Advanced
Nodata Handling for Managed Rasters
Managed rasters, rasters stored within the Geodatabase, represent nodata as a bit mask on each band. This parameter specifies how to handle these nodata bit masks.
- None – Nodata bit masks will be ignored
- Single Alpha Band (default) – Nodata bit masks for each band are merged into a single additional alpha band named geodb_nodata.
If merged into a single alpha band, then the alpha band will contain a value of 0 (nodata) at a given cell if and only if the corresponding cell of all the other bands is nodata.
This parameter only affects managed rasters. Unmanaged rasters, rasters stored in files outside the Geodatabase, have nodata represented as a nodata value per band and do not have nodata bitmasks.