Query Builder functionality

Question

Has anyone built a Query Builder Page in the apps that is similar to the standard APEX Query Builder?

Answer 1

I haven't done exactly this, but remember doing a tabular form genarator (similar to the tabular form wizard in the builder) choosing tables, columns and field types. But that was using Apex 3.2, now that we have jQuery and dynamic actions in Apex 4.0, it should be much easier.
If you looking for an approach, here's one
<li>create a left side bar region with tables from schema: report or list based
select table_name from user_tables<li>On click of the list entry, show a modal dialog of a report based on the columns of the selected table
SELECT * FROM USER_TAB_COLS WHERE table_name = :<TABLE_NAME ITEM> Show images based on column type ("data_type" in user_tab_cols)
Checkboxes return the column name for each row
<li> Have a dynamic action that runs for each checkbox calling a PLSQL to update a collection adding the clicked column name to the the list.
Refresh a updateable report region which is based on the collection , showing the column, sort order,group by options
and JS code to move rows up or down (
move_up code (pseudo code)
this_row = $(this.triggeringElement).parents('tr:first);
prev_row = this_row.prev();
next_row = this_row.next();
//move up
prev_row.before(this_row);Then the SQL code generation would concatenate the application arrays containing the column names adding columns one row at a time and adding sort and order options. You would need to some custom PLSQL coding, looping throw each row adding predicates.