Fix typo in README

[craigpastro]

👋 Hello! This PR fixes a couple of small typos I found when trying out some of the examples. I am not sure that adding the ::text type cast to the urlencode of the json_build_object is the best way, but it is the only way I found it would work.

Thanks!

[pramsey]

Nope, this isn't right... when URL encoding an associative array one wants the keys and values encoded independently, just like the example output shows

[craigpastro]

Ah, I see. Okay, let me revert that. Although, the command still doesn't work with no type cast and also when I try with ::jsonb. It returns ERROR: function urlencode(jsonb) does not exist. I took a look at the code, but C confuses me.

[pramsey]

Perhaps you have an older version installed.

[craigpastro]

Hmm, interesting!

postgres=# select version();
                                                           version
-----------------------------------------------------------------------------------------------------------------------------
 PostgreSQL 14.5 (Debian 14.5-1.pgdg110+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 10.2.1-6) 10.2.1 20210110, 64-bit
(1 row)

postgres=# SELECT *
FROM pg_extension;
  oid  | extname | extowner | extnamespace | extrelocatable | extversion | extconfig | extcondition
-------+---------+----------+--------------+----------------+------------+-----------+--------------
 13743 | plpgsql |       10 |           11 | f              | 1.0        |           |
 16384 | pg_trgm |       10 |         2200 | t              | 1.6        |           |
 16465 | http    |       10 |         2200 | t              | 1.3        |           |
 16510 | plv8    |       10 |           11 | f              | 3.0alpha   |           |
(4 rows)

postgres=# SELECT urlencode(jsonb_build_object('name','Colin & James','rate','50%'));
ERROR:  function urlencode(jsonb) does not exist
LINE 1: SELECT urlencode(jsonb_build_object('name','Colin & James','...
               ^
HINT:  No function matches the given name and argument types. You might need to add explicit type casts.

Anything look strange? I am using the Supabase Postgres Docker image so maybe something is wrong there.

Anyway, thanks for taking a look!

[craigpastro]

Ah, 1.4 adds the url encoding of jsonb. heh heh.

[pramsey]

Works 100% for me:

http=# SELECT urlencode(jsonb_build_object('name','Colin & James','rate','50%'));
            urlencode            
---------------------------------
 name=Colin+%26+James&rate=50%25
(1 row)