callable statement question with sybase

Hello guys:
I have a alter procedure in sqlanywhere as following:

ALTER PROCEDURE "DBA"."spGetAverageList"(
    IN tstStartTime TIMESTAMP,
    IN tstEndTime TIMESTAMP,
    IN intPointCount INT,
    IN strFieldName VARCHAR(100)
  )
RESULT (fldTimeStamp TIMESTAMP, decAverage DECIMAL(8,2))
BEGIN
  DECLARE tstIntervalBegin TIMESTAMP;
  DECLARE tstIntervalEnd TIMESTAMP;
  DECLARE intTimeDiff INT;

DECLARE intStepLength INT;
  DECLARE intCountIndex INT;
  DECLARE decAverageValue DECIMAL(8,2);
  DECLARE intTempValue int;

DECLARE tstAverageTime TIMESTAMP;
  DECLARE intAverageTimeDiff INT;
  DECLARE LOCAL TEMPORARY TABLE tblTempValue(fldTimeStamp TIMESTAMP, fldAverageValue DECIMAL(8,2));

SET intTimeDiff = datediff(second, tstStartTime, tstEndTime);
  SET intStepLength = intTimeDiff / intPointCount;
  SET tstIntervalBegin = tstStartTime;
  SET tstIntervalEnd = DATEADD(second, intStepLength, tstIntervalBegin);
  SET intCountIndex = intPointCount;

WHILE (intCountIndex > 0) LOOP
    SET decAverageValue = 0.0;
    CASE strFieldName
      WHEN 'fldTemperature' THEN
        SELECT CONVERT(DECIMAL(8,2), AVG(fldTemperature)) AS 'Average' INTO decAverageValue
          FROM tblRawData WHERE fldRecordedAt > tstIntervalBegin AND fldRecordedAt <= tstIntervalEnd;
      WHEN 'fldBarometer' THEN
        SELECT CONVERT(DECIMAL(8,2), AVG(fldBarometer)) AS 'Average' INTO decAverageValue
          FROM tblRawData WHERE fldRecordedAt > tstIntervalBegin AND fldRecordedAt <= tstIntervalEnd;
      WHEN 'fldWindDirection' THEN
        SELECT CONVERT(DECIMAL(8,2), AVG(fldWindDirection)) AS 'Average' INTO decAverageValue
          FROM tblRawData WHERE fldRecordedAt > tstIntervalBegin AND fldRecordedAt <= tstIntervalEnd;
      WHEN 'fldSolarRadiation' THEN
        SELECT CONVERT(DECIMAL(8,2), AVG(fldSolarRadiation)) AS 'Average' INTO decAverageValue
          FROM tblRawData WHERE fldRecordedAt > tstIntervalBegin AND fldRecordedAt <= tstIntervalEnd;
      WHEN 'fldHygrometer' THEN
        SELECT CONVERT(DECIMAL(8,2), AVG(fldHygrometer)) AS 'Average' INTO decAverageValue
          FROM tblRawData WHERE fldRecordedAt > tstIntervalBegin AND fldRecordedAt <= tstIntervalEnd;
      WHEN 'fldWindSpeed' THEN
        SELECT CONVERT(DECIMAL(8,2), AVG(fldWindSpeed)) AS 'Average' INTO decAverageValue
          FROM tblRawData WHERE fldRecordedAt > tstIntervalBegin AND fldRecordedAt <= tstIntervalEnd;
      WHEN 'fldWindMaximumPeak' THEN
        SELECT CONVERT(DECIMAL(8,2), AVG(fldWindMaximumPeak)) AS 'Average' INTO decAverageValue
          FROM tblRawData WHERE fldRecordedAt > tstIntervalBegin AND fldRecordedAt <= tstIntervalEnd;
      WHEN 'fldWindAveragePeak' THEN
        SELECT CONVERT(DECIMAL(8,2), AVG(fldWindAveragePeak)) AS 'Average' INTO decAverageValue
          FROM tblRawData WHERE fldRecordedAt > tstIntervalBegin AND fldRecordedAt <= tstIntervalEnd;
      WHEN 'fldWindchillFactor' THEN
        SELECT CONVERT(DECIMAL(8,2), AVG(fldWindchillFactor)) AS 'Average' INTO decAverageValue
          FROM tblRawData WHERE fldRecordedAt > tstIntervalBegin AND fldRecordedAt <= tstIntervalEnd;
      WHEN 'fldPrevalentWindDirection' THEN
        SELECT CONVERT(DECIMAL(8,2), AVG(fldPrevalentWindDirection)) AS 'Average' INTO decAverageValue
          FROM tblRawData WHERE fldRecordedAt > tstIntervalBegin AND fldRecordedAt <= tstIntervalEnd;
      ELSE
        MESSAGE 'The stored procedure "spGetAverageList" has been entered with an unknown field identifier!' TYPE STATUS TO CONSOLE;
        MESSAGE 'The stored procedure "spGetAverageList" has been entered with an unknown field identifier!' TYPE WARNING TO CLIENT;
    END CASE;
    SET intAverageTimeDiff = DATEDIFF(second, tstIntervalBegin, tstIntervalEnd)/2;
    SET tstAverageTime = DATEADD(second, intAverageTimeDiff, tstIntervalBegin);

INSERT INTO tblTempValue (fldTimeStamp, fldAverageValue) VALUES (tstAverageTime, decAverageValue);

SET intCountIndex = intCountIndex - 1;
    SET tstIntervalBegin = tstIntervalEnd;
    SET tstIntervalEnd = DATEADD(second, intStepLength, tstIntervalBegin);
  END LOOP;
  -- According to Sybase Support (2004-06-29) the RESULT clause does not work
  -- with JDBC connections but an alias does create the expected headings.
  SELECT  fldTimeStamp AS "fldTimeStamp", fldAverageValue AS "decAverage" FROM tblTempValue;
END

In general this procedure has four input and two results. I am not sure about this two fields. Are they out parameters or just query result
In my java I do something like that: