defmodule EctoPSQLExtras.IndexSize do
@behaviour EctoPSQLExtras
def info do
%{
title: "The size of indexes, descending by size",
index: 18,
order_by: [size: :desc],
columns: [
%{name: :schema, type: :string},
%{name: :name, type: :string},
%{name: :size, type: :bytes}
]
}
end
def query(_args \\ []) do
"""
/* ECTO_PSQL_EXTRAS: The size of indexes, descending by size */
SELECT n.nspname AS schema, c.relname AS name, sum(c.relpages::bigint*8192)::bigint AS size
FROM pg_class c
LEFT JOIN pg_namespace n ON (n.oid = c.relnamespace)
WHERE n.nspname NOT IN ('pg_catalog', 'information_schema')
AND n.nspname !~ '^pg_toast'
AND c.relkind='i'
GROUP BY (n.nspname, c.relname)
ORDER BY sum(c.relpages) DESC;
"""
end
end