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REPEAT statement
Applies to ❌ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
WHILE's lesser known little sibling is REPEAT, which works the same way as Java's do statement. It is mostly not as useful as WHILE, but can be, occasionally, when a loop must be iterated at least once.
An example:
-- MySQL syntax REPEAT INSERT INTO t (col) VALUES (i); SET i = i + 1; UNTIL i > 10 END REPEAT;
// All dialects
Variable<Integer> i = var("i", INTEGER);
repeat(
insertInto(T).columns(T.COL).values(i),
i.set(i.plus(1))
).until(i.gt(10))
Dialect support
This example using jOOQ:
repeat(deleteFrom(BOOK).where(BOOK.ID.eq(i)), i.set(i.plus(1))).until(i.gt(10))
Translates to the following dialect specific expressions:
Aurora Postgres
<<alias_2>> LOOP DELETE FROM BOOK WHERE BOOK.ID = i; SET i = (i + 1); EXIT alias_2 WHEN i > 10; END LOOP
BigQuery, DB2, HSQLDB, MariaDB, MySQL
REPEAT DELETE FROM BOOK WHERE BOOK.ID = i; SET i = (i + 1); UNTIL i > 10 END REPEAT
Exasol
REPEAT DELETE FROM BOOK WHERE BOOK.ID = i; i := (i + 1); UNTIL i > 10 END REPEAT
Firebird
alias_2:
WHILE (1 = 1) DO BEGIN
DELETE FROM BOOK
WHERE BOOK.ID = :i;
:i = (:i + 1);
IF (:i > 10) THEN
LEAVE alias_2;
END
H2
do {
try (PreparedStatement s = c.prepareStatement(
"DELETE FROM BOOK\n" +
"WHERE BOOK.ID = ?"
)) {
s.setObject(1, i);
s.execute();
}
i = (i + 1);
}
while (!(i > 10))
Hana
WHILE 1 = 1 DO
DELETE FROM BOOK
WHERE BOOK.ID = i;
i = (i + 1);
IF i > 10 THEN
BREAK;
END IF;
END WHILE
Informix
<<alias_2>> LOOP DELETE FROM BOOK WHERE BOOK.ID = i; LET i = (i + 1); EXIT alias_2 WHEN i > 10; END LOOP
Oracle, Postgres, YugabyteDB
<<alias_2>> LOOP DELETE FROM BOOK WHERE BOOK.ID = i; i := (i + 1); EXIT alias_2 WHEN i > 10; END LOOP
ASE, Access, Aurora MySQL, ClickHouse, CockroachDB, Derby, DuckDB, MemSQL, Redshift, SQLDataWarehouse, SQLServer, SQLite, Snowflake, Sybase, Teradata, Trino, Vertica
/* UNSUPPORTED */
Generated with jOOQ 3.20. Translate your own SQL on our website
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