Wiki editor request

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От Damian Lęcznar
Тема Wiki editor request
Дата
Msg-id CABcGmtEWCHEsTo0i4e23Z+97jNvcMDbcmQHWeG=EHJKTbMvWWA@mail.gmail.com
обсуждение исходный текст
Ответы Re: Wiki editor request  (Alvaro Herrera <alvherre@2ndquadrant.com>)
Список pgsql-www
Hey,

On page https://wiki.postgresql.org/wiki/Index_Maintenance, query for 

Index size/usage statistics

Should be:
SELECT
    t.tablename,
    indexname,
    c.reltuples AS num_rows,
    pg_size_pretty(pg_relation_size(quote_ident(t.tablename)::text)) AS table_size,
    pg_size_pretty(pg_relation_size(quote_ident(indexrelname)::text)) AS index_size,
    CASE WHEN indisunique THEN 'Y'
       ELSE 'N'
    END AS UNIQUE,
    idx_scan AS number_of_scans,
    idx_tup_read AS tuples_read,
    idx_tup_fetch AS tuples_fetched
FROM pg_tables t
LEFT OUTER JOIN pg_class c ON t.tablename=c.relname
LEFT OUTER JOIN
    ( SELECT c.relname AS ctablename, ipg.relname AS indexname, x.indnatts AS number_of_columns, idx_scan, idx_tup_read, idx_tup_fetch, indexrelname, indisunique FROM pg_index x
           JOIN pg_class c ON c.oid = x.indrelid
           JOIN pg_class ipg ON ipg.oid = x.indexrelid
           JOIN pg_stat_all_indexes psai ON x.indexrelid = psai.indexrelid AND psai.schemaname = 'public')
    AS foo
    ON t.tablename = foo.ctablename
WHERE t.schemaname='public'
ORDER BY 1,2;

Because if you're using as example pg_logical, and you have in your database similar table, it will give you an error on output:
ERROR:  relation "subscription_sub_name_key" does not exist

I'm using this page a lot, and I want to stop changing this query :)
Pg logical is popular right now, so if I may ask - could someone plz change it.


​Best Regards,
Damian Lęcznar

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