SetSQL Method

Applies To

Description

This method sets the SQL statement that will be used the next time the dynaset or sqlstmt is refreshed.

Usage

oresult SetSQL(const char *sqls)

Arguments

sqls

The new SQL statement.

Remarks

OBinder: This method sets the SQL statement to be used the next time RefreshQuery is called.

ODynaset: This method sets the SQL statement to be used on the next Refresh. The ODynaset copies the SQL statement, so the calling routine does not have to retain it. (See GetSQL for more discussion.)

The result set of a dynaset is determined by the SQL statement that is executed to fetch the records. This method enables you to reset the SQL statement of the dynaset. Resetting the SQL statement does not immediately change the dynaset's result set.

The dynaset's result set can be changed to correspond to the new SQL statement by calling ODynaset::Refresh or OBinder::RefreshQuery.

Setting the SQL statement invalidates any pointers to previously returned SQL statements (from GetSQL).

OSqlStmt: This method sets the SQL statement to use on the next Refresh. The OSqlStmt copies the SQL statement, so the calling routine does not have to retain it. (See GetSQL for more discussion.)

You can change the sqlstmt object's result set to correspond to the new SQL statement by calling OSqlStmt::Refresh.

Setting the SQL statement invalidates any pointers to previously returned SQL statements (from GetSQL).

Return Value

An oresult indicating whether the operation succeeded (OSUCCESS) or not (OFAILURE).

Example

Change the SQL statement of a dynaset:

// open an ODatabase object

ODatabase odb("ExampleDB", "scott", "tiger");

// open an ODynaset

ODynaset odyn(odb, "select * from emp order by ename");

// ... do some processing ...

// now get the records again, but in a different order

odyn.SetSQL("select * from emp order by empno");

odyn.Refresh();