The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/13/functions-array.html Description:
For whom it may concern, I'd like to propose an extension for `array_length` function description. Currently, it does not cover the case of an empty array: https://www.postgresql.org/docs/13/functions-array.html Table 9.52. Array Functions. Row 5 The description reads as `Returns the length of the requested array dimension.` For me, an expected result for an empty array would be `0`, but it is `NULL`. Tested on `PostgreSQL 13.4` with query `SELECT ARRAY_LENGTH(ARRAY[]::CHARACTER VARYING[],1);` I believe, such case deserves to be mentioned in the description and/or in examples. With best regards, Oleg Rekin
