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Java Class Reference
256
Throws
DhSQLException
Notes • Before invoking getValue, you must test for the NULL condition by calling the
SQLCursor.wasNULL method. If the value returned is NULL, you must explicitly set the
target variable in the stored procedure to NULL.
• The getValue method returns a value from the result set identified by the number you
specify in the fieldNum parameter. getValue returns the value as an object of the data type
you specify in the fieldType parameter. Since getValue returns the result as an instance
of class Object, you must explicitly cast your return value to the correct data type.
• If the returned value is of data type CHARACTER, then getValue returns a Java String
Object. You must declare a procedure variable of type String and explicitly cast the value
returned by getValue to type String.
Example This example illustrates testing for NULL and invoking the Java getValue method:
Integer pvar_int = new Integer(0);
String pvar_str = new String();
SQLCursor select_t1 = new SQLCursor
("select int_col, char_col from T1");
Select_t1.open();
Select_t1.fetch();
while(select_t1.found())
{
// Assign values from the current row of the SQL result set
// to the procedure variables. First check whether
// the values fetched are null. If null then explicitly
// set the procedure variables to null.
}
SQLCursor.makeNULL
Sets the value of an SQL statement’s input parameter to NULL. This method is common to the
SQLCursor, SQLIStatement, and SQLPStatement classes. This method is redundant with using
the setParam method to set an SQL statement’s input parameter to NULL.
Format
Returns
if ((select_t1.wasNULL(1)) == true)
pvar_int = null;
else
pvar_int = (Integer)select_t1.getValue(1, INTEGER);
if ((select_t1.wasNULL(2)) == true)
pvar_str = null;
else
pvar_str = (String)select_t1.getValue(1, CHAR);
public void makeNULL(int f)
None