[GENERAL] parray_gin and \d errors in PG10

After installing parray_gin extension and pg_upgrading another instance,
\d is failing like so:

[pryzbyj@database ~]$ psql ts -c '\d pg_class'
ERROR:  operator is not unique: "char"[] @> unknown
LINE 6:   (stxkind @> '{d}') AS ndist_enabled,                  ^
HINT:  Could not choose a best candidate operator. You might need to add explicit type casts.

[pryzbyj@database ~]$ psql ts -c '\d pg_class' -E
[...]
********* QUERY **********
SELECT oid, stxrelid::pg_catalog.regclass, stxnamespace::pg_catalog.regnamespace AS nsp, stxname, (SELECT
pg_catalog.string_agg(pg_catalog.quote_ident(attname),',')  FROM pg_catalog.unnest(stxkeys) s(attnum)  JOIN
pg_catalog.pg_attributea ON (stxrelid = a.attrelid AND       a.attnum = s.attnum AND NOT attisdropped)) AS columns,
(stxkind@> '{d}') AS ndist_enabled, (stxkind @> '{f}') AS deps_enabled
 
FROM pg_catalog.pg_statistic_ext stat WHERE stxrelid = '1259'
ORDER BY 1;
**************************

ERROR:  operator is not unique: "char"[] @> unknown
LINE 6:   (stxkind @> '{d}') AS ndist_enabled,                  ^
HINT:  Could not choose a best candidate operator. You might need to add explicit type casts.

Thankfully this is still working:
ts=# \do @>
                                            List of operators  Schema   | Name | Left arg type | Right arg type |
Resulttype |              Description               
 
------------+------+---------------+----------------+-------------+----------------------------------------pg_catalog |
@>  | aclitem[]     | aclitem        | boolean     | containspg_catalog | @>   | anyarray      | anyarray       |
boolean    | containspg_catalog | @>   | anyrange      | anyelement     | boolean     | containspg_catalog | @>   |
anyrange     | anyrange       | boolean     | containspg_catalog | @>   | box           | box            | boolean
|containspg_catalog | @>   | box           | point          | boolean     | containspg_catalog | @>   | circle        |
circle        | boolean     | containspg_catalog | @>   | circle        | point          | boolean     |
containspg_catalog| @>   | jsonb         | jsonb          | boolean     | containspg_catalog | @>   | path          |
point         | boolean     | containspg_catalog | @>   | polygon       | point          | boolean     |
containspg_catalog| @>   | polygon       | polygon        | boolean     | containspg_catalog | @>   | tsquery       |
tsquery       | boolean     | containspublic     | @>   | hstore        | hstore         | boolean     | public     |
@>  | text[]        | text[]         | boolean     | text array contains compared by strict
 
(15 rows)

This query works fine when adding cast to text[]:

ts=# SELECT oid, stxrelid::pg_catalog.regclass, stxnamespace::pg_catalog.regnamespace AS nsp, stxname, (SELECT
pg_catalog.string_agg(pg_catalog.quote_ident(attname),',')  FROM pg_catalog.unnest(stxkeys) s(attnum)  JOIN
pg_catalog.pg_attributea ON (stxrelid = a.attrelid AND       a.attnum = s.attnum AND NOT attisdropped)) AS columns,
(stxkind@> '{d}'::text[]) AS ndist_enabled, (stxkind @> '{f}'::text[]) AS deps_enabled
 
FROM pg_catalog.pg_statistic_ext stat WHERE stxrelid = '1259'
ORDER BY 1;oid | stxrelid | nsp | stxname | columns | ndist_enabled | deps_enabled 
-----+----------+-----+---------+---------+---------------+--------------
(0 rows)

Is this to be considered an issue with parray_gin or with psql ?

I don't think that's an urgent problem to fix, but if someone has a workaround
for \d I would appreciate if you'd pass it along :)

Thanks in advance
Justin


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