unionarg — A composite type used as input into the ST_Union function defining the bands to be processed and behavior of the UNION operation.
A composite type used as input into the ST_Union function defining the bands to be processed and behavior of the UNION operation.
| Field | Type | Description |
|---|---|---|
nband
|
integer | 1-based value indicating the band of each input raster to be processed. |
uniontype
|
text | Type of union operation. One of the types described in ST_Union. |