unionarg
Name
unionarg — A composite type used as input into the ST_Union function defining the bands to be processed and behavior of the UNION operation.
Description
A composite type used as input into the ST_Union function defining the bands to be processed and behavior of the UNION operation.
- 
     
      
       
nbandinteger - 
     
1-based value indicating the band of each input raster to be processed.
 - 
     
      
       
uniontypetext - 
     
Type of UNION operation. One of defined types as described in ST_Union .