Ingres 12.0 | REPEAT - ENDREPEAT Example

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REPEAT - ENDREPEAT Example

In the following REPEAT - ENDREPEAT statement example, this database procedure, delete_n_rows, accepts as input a base number and a number of rows. The specified rows are deleted from the table “tab,” starting from the base number. Because this is a repeat loop, one row will always be deleted. If it is possible for no rows to be identified, the pre-testing WHILE – ENDWHILE loop should be used instead. If an error occurs, the loop terminates:

create procedure delete_n_rows

(base integer, n integer) as

declare

limit integer;

err integer;

begin

limit = base + n;

err = 0;

repeat

delete from tab where val = :base;

if iierrornumber > 0 then

err = 1;

endloop;

endif;

base = base + 1;

until (base < limit) endrepeat;

return :err;

end

Last modified date: 08/29/2024