SQL Language Guide > SQL Language Guide > SQL Statements > REPEAT - ENDREPEAT > 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 NOT NULL;
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: 12/06/2024