[jira] [Created] (SYSTEMML-658) Setting scalar strings not automatically treated as strings by JMLC

[Deron Eriksson (JIRA)]

Deron Eriksson created SYSTEMML-658:
---------------------------------------

             Summary: Setting scalar strings not automatically treated as 
strings by JMLC
                 Key: SYSTEMML-658
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-658
             Project: SystemML
          Issue Type: Bug
            Reporter: Deron Eriksson
            Priority: Minor


When using JMLC to set scalar string values, the values are not automatically 
treated as strings as a result of calling setScalar with a string value.

For example, take the following DML:
{code}
inScalar1 = read("./tmp/doesntexist1", data_type="scalar", value_type="string");
inScalar2 = read("./tmp/doesntexist2", data_type="scalar", value_type="string");
print(inScalar1 + inScalar2);
{code}

The above will be treated correctly. However, the following won't be treated 
correctly:

{code}
inScalar1 = read("./tmp/doesntexist1", data_type="scalar");
inScalar2 = read("./tmp/doesntexist2", data_type="scalar");
print(inScalar1 + inScalar2);
{code}

(this will output "0.0")

Calling PreparedScript's setScalar with a String should automatically resolve 
to a String.
{code}
Connection conn = new Connection();
String str = conn.readScript("scalar-input-string.dml");
PreparedScript script = conn.prepareScript(str, new String[] { "inScalar1", 
"inScalar2" }, new String[] {},
                false);
String inScalar1 = "hello";
String inScalar2 = "goodbye";
script.setScalar("inScalar1", inScalar1);
script.setScalar("inScalar2", inScalar2);
script.executeScript();
{code}

This should produce "hellogoodbye" rather than "0.0" with both DML examples.



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