Обсуждение: Example for unnest(anyarray, anyarray) fails
The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/9.6/functions-array.html Description: ~ $ psql psql (11.2, server 9.6.14) Type "help" for help. ghowe=# select version(); version --------------------------------------------------------------------------------------------------------------- PostgreSQL 9.6.14 on x86_64-apple-darwin14.5.0, compiled by Apple LLVM version 7.0.0 (clang-700.1.76), 64-bit (1 row) ghowe=# select unnest(ARRAY[1,2],ARRAY['foo','bar','baz']); ERROR: function unnest(integer[], text[]) does not exist LINE 1: select unnest(ARRAY[1,2],ARRAY['foo','bar','baz']) ^ HINT: No function matches the given name and argument types. You might need to add explicit type casts.
On Wed, Dec 11, 2019 at 3:21 PM PG Doc comments form <noreply@postgresql.org> wrote:
The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/9.6/functions-array.html
Description:
[...]
ghowe=# select unnest(ARRAY[1,2],ARRAY['foo','bar','baz']);
ERROR: function unnest(integer[], text[]) does not exist
LINE 1: select unnest(ARRAY[1,2],ARRAY['foo','bar','baz'])
^
HINT: No function matches the given name and argument types. You might need
to add explicit type casts.
As your query doesn't place the unnest function in the FROM clause as the documentation says is required it is to be expected that your query fails. The subsequent part of that sentence links you over to the section of the documentation that provides a full example. The one in the table is intended as a quick-reference.
David J.