Allow NULL values for min and max

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@49203 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/temporal/raster3d_metadata_table.sql

@@ -21,8 +21,8 @@ CREATE TABLE  raster3d_metadata (
   nsres DOUBLE PRECISION NOT NULL,
   ewres DOUBLE PRECISION NOT NULL,
   tbres DOUBLE PRECISION NOT NULL,
-  min DOUBLE PRECISION NOT NULL,
-  max DOUBLE PRECISION NOT NULL,
+  min DOUBLE PRECISION,
+  max DOUBLE PRECISION,
   PRIMARY KEY (id),
   FOREIGN KEY (id) REFERENCES  raster3d_base (id) ON DELETE CASCADE
 );

lib/temporal/raster_metadata_table.sql

@@ -19,8 +19,8 @@ CREATE TABLE  raster_metadata (
   number_of_cells INTEGER NOT NULL,
   nsres DOUBLE PRECISION NOT NULL,
   ewres DOUBLE PRECISION NOT NULL,
-  min DOUBLE PRECISION NOT NULL,
-  max DOUBLE PRECISION NOT NULL,
+  min DOUBLE PRECISION,
+  max DOUBLE PRECISION,
   PRIMARY KEY (id),
   FOREIGN KEY (id) REFERENCES  raster_base (id) ON DELETE CASCADE
 );