Re: bug regclass::oid

On 2019-06-16 18:03:02 +0200, John Mikel wrote:
> hi again 
> here is my query 
>  select   A.table_name  as "table_name",A.domain_name as "domain",
>  format_type(c.atttypid, c.atttypmod)  AS data_type ,A.column_name as
> "column_name",
>   A.is_nullable as "nullable",A.column_default as "default"
>   from information_schema.columns A inner  join pg_attribute c  on 
> a.table_name::regclass::oid=c.attrelid
>   where  a.table_schema in (select current_schema()) and  a.column_name =
> c.attname ;
>
> if i run this query in any database contain at least one table with space in
> their name , an error occurred

Note that Adrian had the name enclosed in double quotes:

> Le jeu. 13 juin 2019 à 17:33, Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> a
> écrit :
>
>> Try:
>>
>> SELECT '"this is test"'::regnamespace::oid;  not working ;
>>
>> Same for table name. As example:
>>
>> select '"space table"'::regclass;

You don't do that you just try to use a.table_name as is. But
'space table'::regclass doesn't work.

You have to quote the table name:

hjp=> select table_schema, table_name::regclass, column_name from information_schema.columns where table_name like '% %';
ERROR: invalid name syntax
Time: 5.794 ms
hjp=> select table_schema, quote_ident(table_name)::regclass, column_name from information_schema.columns where table_name like '% %';
╔══════════════╤═════════════╤═════════════╗
║ table_schema │ quote_ident │ column_name ║
╟──────────────┼─────────────┼─────────────╢
║ public │ "foo bar" │ id ║
╚══════════════╧═════════════╧═════════════╝
(1 row)

hp

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