Sql in master detail form

Question

I am interested in the sql used by masterdetail oracle forms.
Suppose you don't have any crietriea then we can do just
masterblock=select * from master
detailblock=select * from detail
if there are crietrieas then
how does it uses the sql in detail query
like below or not
masterblock=select * from master where ..=..
detailblock=select detail.* from master,detail where master.fld=detail.fld and master..=..

Answer 1

If you look at the Copy Value from Item property of the items or items in the detail block that are specified in the join condition of the relation, you'll see that the value is copied from the master block. This creates the where condition in the query.
If you look at :system.last_query (you can programatically message it out or display it in a text item), you'll see something like:
SELECT ROWID,ORDER_ID,LINE_ITEM_ID,PRODUCT_ID,UNIT_PRICE,QUANTITY FROM order_items WHERE (ORDER_ID=2354) order by line_item_id
In this particular case, the "(ORDER_ID=2354)" came from the Copy Value from Item property for the ORDER_ID item in the ORDER_ITEMS (detail) block, and the "order by line_item_id" came from the ORDER BY Clause property for the ORDER_ITEMS block.