Oracle Forms Developer – Form Builder Reference, Volume 1

SYSTEM.LAST_QUERY system variable
Syntax
SYSTEM.LAST_QUERY
Description
SYSTEM.LAST_QUERY represents the query SELECT statement that Form Builder most recently used
to populate a block during the current Runform session. The value is always a character string.
SYSTEM.LAST_QUERY examples
Example 1
Assume that you want to generate a report in Report Builder that retrieves information identical to a
query you perform in Form Builder. The following examples show how to use
SYSTEM.LAST_QUERY to extract the WHERE/ORDER BY clause from the last query so you can
pass the results to Report Builder using the RUN_PRODUCT built-in.
FUNCTION Last_Where_Clause
RETURN VARCHAR2
IS
tmp_lstqry VARCHAR2(10000) := :System.Last_Query;
tmp_curblk VARCHAR2(40);
tmp_index NUMBER;
tmp_where VARCHAR2(2000);
BEGIN
/*
** See if we can find the word ’WHERE’ in
** the text of the Last Query
*/
tmp_index:= INSTR(tmp_lstqry,’WHERE’);
/*
** If we found it (at a positive index into
** the string), we extract the remainder of
** the text that follows the word ’WHERE’ as
** the Where clause. This might include ORDER BY
** clause, too.
*/
IF tmp_index > 0 THEN
tmp_where := SUBSTR(tmp_lstqry, tmp_index + 6);
END IF;
RETURN (tmp_where);
EXCEPTION
WHEN OTHERS THEN
RETURN NULL;
END;
Example 2
PROCEDURE Run_Report_For_Last_Query
IS
pl ParamList;
wc VARCHAR2(2000); -- The Where Clause to Pass
BEGIN
/*
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