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Updated on 2025-08-25 GMT+08:00
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Subscript Generating Functions

generate_subscripts(array anyarray, dim int)

Description: Generates a series comprising the given array's subscripts.

Return type: setof int

Example:

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SELECT generate_subscripts('{NULL,1,NULL,2}'::int[], 1) AS s;
 s 
---
 1
 2
 3
 4
(4 rows)

generate_subscripts(array anyarray, dim int, reverse boolean)

Description: Generates a series comprising the given array's subscripts. When reverse is true, the series is returned in reverse order.

Return type: setof int

Example:

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SELECT generate_subscripts('{NULL,1,NULL,2}'::int[], 1,TRUE) AS s;
 s
---
 4
 3
 2
 1
(4 rows)
Parent topic: Set Returning Functions