[postgis-users] ST_MapAlgebraExpr nodata value

[Jose Carlos Martinez]

Hi list,
I understand that the nodataval in ST_MapAlgebraExpr burns the pixels 
which have nodata from the input raster with a new value but my question is:

The expected behaviour is that ST_MapAlgebraExpr keeps the nodataval 
from the input raster even though I change the nodataval parameter?
Im using ST_SetNodataValue after ST_MapAlgebraExp but I dont know if 
this is the right procedure.

Best,
Jose