[postgis-users] Problem using ST_MapAlgebraExpr

[DavidRA]

Hello, I'm willing to create a PL/pgSQL function in orden to obtain
normalized (0-1) rasters. This is what I have so far:



The thing is that I don't know how to handle the variables inside the
ST_MapAlgebraExpr expression. As it is now, I get an error when running the
function because it takes the minVal and maxVal variables as if they where
columns of some table.

Is there a way to use inside the expression those variables I defined
previously? Thanks a lot!

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