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CHOOSE

Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition

The CHOOSE() function acts as a switch over an integer to return the nth argument. It is an abbreviated CASE expression

SELECT
  choose(1, 'a', 'b'),
  choose(2, 'a', 'b'),
  choose(3, 'a', 'b');

create.select(
  choose(val(1), val("a"), val("b")),
  choose(val(2), val("a"), val("b")),
  choose(val(3), val("a"), val("b"))).fetch();

The result being

+--------+--------+--------+
| choose | choose | choose |
+--------+--------+--------+
| a      | b      | {null} |
+--------+--------+--------+

Dialect support

This example using jOOQ:

choose(val(1), val("a"), val("b"))

Translates to the following dialect specific expressions:

SWITCH(1 = 1, 'a', 1 = 2, 'b')

CASE 1
  WHEN 1 THEN 'a'
  WHEN 2 THEN 'b'
END

elt(1, 'a', 'b')

elt(
  CASE
    WHEN 1 BETWEEN 1 AND 2 THEN 1
  END,
  'a',
  'b'
)

CASE
  WHEN 1 = 1 THEN 'a'
  WHEN 1 = 2 THEN 'b'
END

choose(1, 'a', 'b')

Generated with jOOQ 3.21. Support in older jOOQ versions may differ. Translate your own SQL on our website

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