Update clause should support data coming from the decode operation

[Alex Dumitru]

The following query fails due to the type check:

UPDATE MyCoverage SET MyCoverage[0:1199,0:1199] ASSIGN shift(decode($1), [0,0]) WHERE oid(MyCoverage) = 513

As decode cannot provide the type of its contents before evaluation, checkType will fail.

[Dimitar Misev]

Are you sure, seems to work fine:

$ rasql -q "update mr2 as a set a[*:*, *:*] assign shift(decode(\$1), [0,0]) where oid(a) = 3585" -f ./manuals_and_examples/examples/images/mr_1.tif
rasql: rasdaman query tool v1.0, rasdaman v9.1.0 -- generated on 10.07.2015 16:50:44.
opening database RASBASE at localhost:7001...ok
fetching type information for GreyString from database, using readonly transaction...ok
reading file ./manuals_and_examples/examples/images/mr_1.tif...ok
  constant 1: GMarray
  Oid...................: 
  Type Structure........: 
  Type Schema...........: marray< char >
  Domain................: [0:33759]
  Base Type Schema......: char
  Base Type Length......: 1
  Data format.......... : Array
  Data size (bytes).... : 33760
Executing update query...ok
rasql done.