REPEAT statement
Repeat the execution of a list of statements until a condition is true.
This statement may only be used within a compound statement.
Syntax
[ label : ] REPEAT
{ stmt ; } [...]
UNTIL cond
END REPEAT [ label ]
Parameters
-
label
An optional label for the loop, which is unique amongst all labels for statements within which the
REPEATstatement is contained. The label can be used to LEAVE or ITERATE the loop. -
cond
Any expression evaluating to a BOOLEAN
-
stmt
A SQL statement
Examples
-- sum up all odd numbers from 1 through 10
> BEGIN
DECLARE sum INT DEFAULT 0;
DECLARE num INT DEFAULT 0;
sumNumbers: REPEAT
SET num = num + 1;
IF num % 2 = 0 THEN
ITERATE sumNumbers;
END IF;
SET sum = sum + num;
UNTIL num = 10
END REPEAT sumNumbers;
VALUES (sum);
END;
25
-- Compare with the much more efficient relational computation:
> SELECT sum(num) FROM range(1, 10) AS t(num) WHERE num % 2 = 1;
25