1、查看greenplum分布键

select d.nspname||'.'||a.relname as table_name,string_agg(b.attname,',') as column_name
from
pg_catalog.pg_class a
inner join
pg_catalog.pg_attribute b
on a.oid=b.attrelid
inner join
pg_catalog.gp_distribution_policy c
on a.oid=c.localoid
inner join pg_catalog.pg_namespace d
on a.relnamespace=d.oid
where a.relkind='r' and b.attnum=any(c.attrnums)
and a.relname not like '%prt%'
group by table_name
order by table_name desc;