Export_to_Excel_pkg - How to exclude some fields in the export?

Question

While it does generate an excel spreadsheet, it includes all the columns of my report even though I have conditions on most of them. I allow the user to select the columns he/she wants in the report. So I want the Excel spreadsheet to have the same fields as the report. How can this be accomplished?
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I use APEX 3.0.1 not APEX 3.1 and I don't use a report server.
<br>
<br>
Please help!
<br>
Regards,
Robert

Answer 1

I was able to create an Excel spreadsheet excluding some fields based on the column's condition. I accomplished this by modifying the Export_to_Excel_pkg package. I added a new procedure and modified an existing one (print_report_header). I bolded the area where I changed or added code.<br><br>
FOR c IN (SELECT   column_alias, NVL (heading, column_alias) heading,
                   format_mask
,condition_type,condition_expression1,condition_expression2
              FROM apex_application_page_rpt_cols
             WHERE page_id = p_page_id
               AND application_id = p_app_id
               AND region_id = TO_NUMBER (LTRIM (p_region, 'R'))
  -- AND include_in_export = 'Yes'
AND (column_link_text is null or
(column_link_text is not null and
UPPER(column_link_text)=UPPER(column_alias))
)            -- and column_is_hidden = 'No'
          ORDER BY display_sequence)
     LOOP
if upper(c.condition_type) = 'PLSQL_EXPRESSION' then
export_excel_pkg.get_include_in_report(p_page_id
,p_app_id
,p_region
,c.column_alias
,c.condition_expression1
,v_include_in_report);
if v_include_in_report <> 'YES' then
goto next_field;
else
null;
end if;
else
null;
        end if;
        v_number_of_cols := v_number_of_cols + 1;
        v_column_header_list :=
                v_column_header_list || ';' || REPLACE (c.heading, ';', ' ');
        v_column_alias_list := v_column_alias_list || ';' || c.column_alias;
        -- apply column formatting
        IF c.format_mask IS NOT NULL
        THEN
           v_column_select_list :=
                 v_column_select_list
              || ',to_char('
              || c.column_alias
              || ','''
              || c.format_mask
              || ''') '
              || c.column_alias;
        ELSE
           v_column_select_list :=
                               v_column_select_list || ',' || c.column_alias;
        END IF;
<<next_field>>
null;     END LOOP;
The new procedure:<br>
PROCEDURE get_include_in_report (
p_page_id IN number,
p_app_id IN number,
p_region IN VARCHAR2,
p_column_alias IN VARCHAR2,
p_condition_expression1 IN VARCHAR2,
p_include_in_report OUT VARCHAR2)
AS
v_condition varchar2(20) := 'PLSQL_EXPRESSION';
v_query varchar2(32767);
v_include varchar2(3) := 'NO';
v_cur_hdl INT;
v_rows_processed INT;
begin
v_query :=
'SELECT ''YES'' '
|| 'FROM apex_application_page_rpt_cols '
|| 'WHERE page_id = :g_page_id '
|| 'AND application_id = :g_app_id '
|| 'AND region_id = TO_NUMBER (LTRIM (:g_region, ''R'')) '
|| 'AND condition_type = :g_condition '
|| 'AND column_alias = :g_alias '
|| 'AND ' || p_condition_expression1 ;
-- open cursor
v_cur_hdl := DBMS_SQL.OPEN_CURSOR;
-- parse the query
DBMS_SQL.PARSE(v_cur_hdl,v_query,DBMS_SQL.NATIVE);
-- Supply binds (bind by name)
DBMS_SQL.BIND_VARIABLE(v_cur_hdl, 'g_page_id',p_page_id);
DBMS_SQL.BIND_VARIABLE(v_cur_hdl, 'g_app_id', p_app_id);
DBMS_SQL.BIND_VARIABLE(v_cur_hdl, 'g_region', p_region);
DBMS_SQL.BIND_VARIABLE(v_cur_hdl, 'g_condition',v_condition);
DBMS_SQL.BIND_VARIABLE(v_cur_hdl, 'g_alias',p_column_alias);
-- Describe defines
DBMS_SQL.DEFINE_COLUMN(v_cur_hdl, 1, v_include, 3);
-- Execute
v_rows_processed := DBMS_SQL.EXECUTE(v_cur_hdl);
-- Fetch a row
IF DBMS_SQL.FETCH_ROWS(v_cur_hdl) > 0 THEN
-- Fetch columns from the row
DBMS_SQL.COLUMN_VALUE(v_cur_hdl, 1, v_include);
-- Process
ELSE
null;
END IF;
DBMS_SQL.CLOSE_CURSOR(v_cur_hdl); -- close cursor
p_include_in_report := v_include;
end;
<br>
<br>
I hope this helps others as well.
<br>
<br>
Regards,<br>
Robert