Format

SDO_GEOR.hasBitmapMask(
     georaster    IN SDO_GEORASTER, 
     layerNumber  IN NUMBER 
     ) RETURN VARCHAR2;

Description

Checks if a GeoRaster object or layer has an associated bitmap mask.

Parameters

georaster

GeoRaster object.

layerNumber

Number of the layer to check. A value of 0 (zero) indicates the object layer.

Usage Notes

This function returns the string TRUE if the GeoRaster object or layer has an associated bitmap mask, or FALSE if it does not have an associated bitmap mask.

For an explanation of bitmap masks, see Bitmap Masks.

Examples

The following example checks if layers 0 through 4 of a specified GeoRaster object have associated bitmap masks.

SELECT substr(sdo_geor.hasBitmapMask(georaster,0),1,12) BM0,
       substr(sdo_geor.hasBitmapMask(georaster,1),1,12) BM1,
       substr(sdo_geor.hasBitmapMask(georaster,2),1,12) BM2,
       substr(sdo_geor.hasBitmapMask(georaster,3),1,12) BM3
  FROM georaster_table WHERE georid=0;