Create a viable copy of a table schema for moving redshift table data between DB's -- doesn't copy secondary index details (would be nice to get it improved to do that though) Edit the "source_table_name" string at the bottom to the table you want the structure for. This script DOES NOT create the table - merely creates the SQL statement necessa…

create_table_query_from_redshift_table.sql

select pk.pkey, tm.schemaname||'.'||tm.tablename, 'create table '||tm.schemaname||'.'||tm.tablename
||' ('
||cp.coldef
-- primary key
||decode(pk.pkey,null,'',pk.pkey)
-- diststyle and dist key
||decode(d.distkey,null,')\n diststyle '||dist_style||' ',d.distkey)
--sort key
|| (select decode(skey,null,'',skey) from  (select
' sortkey(' ||substr(array_to_string(
                 array( select ','||cast(column_name as varchar(100))  as str from
                       (select column_name from information_schema.columns col where  col.table_schema= tm.schemaname and col.table_name=tm.tablename) c2
                        join
                        (-- gives sort cols
                          select attrelid as tableid, attname as colname, attsortkeyord as sort_col_order from pg_attribute pa where
                          pa.attnum > 0  AND NOT pa.attisdropped AND pa.attsortkeyord > 0
                        ) st on tm.tableid=st.tableid and c2.column_name=st.colname   order by sort_col_order
                      )
                ,'')
              ,2,10000) || ')' as skey
))
||';'
-- additional alter table queries here to set owner
|| '\nalter table '||tm.schemaname||'.'||tm.tablename||' owner to "'||tm.owner||'";'
from
-- t  master table list
(
SELECT substring(n.nspname,1,100) as schemaname, substring(c.relname,1,100) as tablename, c.oid as tableid ,use2.usename as owner, decode(c.reldiststyle,0,'EVEN',1,'KEY',8,'ALL') as dist_style
FROM pg_namespace n, pg_class c,  pg_user use2
WHERE n.oid = c.relnamespace
AND nspname NOT IN ('pg_catalog', 'pg_toast', 'information_schema')
AND c.relname <> 'temp_staging_tables_1'
and c.relowner = use2.usesysid
) tm
-- cp  creates the col params for the create string
join
(select
substr(str,(charindex('QQQ',str)+3),(charindex('ZZZ',str))-(charindex('QQQ',str)+3)) as tableid
,substr(replace(replace(str,'ZZZ',''),'QQQ'||substr(str,(charindex('QQQ',str)+3),(charindex('ZZZ',str))-(charindex('QQQ',str)+3)),''),2,10000) as coldef
from
( select array_to_string(array(
SELECT  'QQQ'||cast(t.tableid as varchar(10))||'ZZZ'|| ',\n    "'||column_name||'" '|| decode(udt_name,'bpchar','char',udt_name) || decode(character_maximum_length,null,'', '('||cast(character_maximum_length as varchar(9))||')'   )
-- default
|| decode(substr(column_default,2,8),'identity','',null,'',' default '||column_default||' ')
-- nullable
|| decode(is_nullable,'YES',' NULL ','NO',' NOT NULL ')
-- identity
|| decode(substr(column_default,2,8),'identity',' identity('||substr(column_default,(charindex('''',column_default)+1), (length(column_default)-charindex('''',reverse(column_default))-charindex('''',column_default)   ) )  ||')\n ', '')
-- encoding
|| decode(enc,'none','',' encode '||enc)
 as str
from
-- ci  all the col info
(
select cast(t.tableid as int), cast(table_schema as varchar(100)), cast(table_name as varchar(100)), cast(column_name as varchar(100)),
cast(ordinal_position as int), cast(column_default as varchar(100)), cast(is_nullable as varchar(20)) , cast(udt_name as varchar(50))  ,cast(character_maximum_length as int),
 sort_col_order  , decode(d.colname,null,0,1) dist_key , e.enc
from
(select * from information_schema.columns c where  c.table_schema= t.schemaname and c.table_name=t.tablename) c
left join
(-- gives sort cols
select attrelid as tableid, attname as colname, attsortkeyord as sort_col_order from pg_attribute a where
 a.attnum > 0  AND NOT a.attisdropped AND a.attsortkeyord > 0
) s on t.tableid=s.tableid and c.column_name=s.colname
left join
(-- gives encoding
select attrelid as tableid, attname as colname, format_encoding(a.attencodingtype::integer) AS enc from pg_attribute a where
 a.attnum > 0  AND NOT a.attisdropped
) e on t.tableid=e.tableid and c.column_name=e.colname
left join
-- gives dist col
(select attrelid as tableid, attname as colname from pg_attribute a where
 a.attnum > 0 AND NOT a.attisdropped  AND a.attisdistkey = 't'
) d on t.tableid=d.tableid and c.column_name=d.colname
order by ordinal_position
) ci
-- for the working array funct
), '') as str
from
(-- need tableid
 SELECT substring(n.nspname,1,100) as schemaname, substring(c.relname,1,100) as tablename, c.oid as tableid
 FROM pg_namespace n, pg_class c
 WHERE n.oid = c.relnamespace
 AND nspname NOT IN ('pg_catalog', 'pg_toast', 'information_schema')
 ) t
)) cp on tm.tableid=cp.tableid
-- primary key query here
left join
(select c.oid as tableid, ',\n    primary key '|| substring(pg_get_indexdef(indexrelid),charindex('(',pg_get_indexdef(indexrelid))-1 ,60) as pkey
 from pg_index i , pg_namespace n, pg_class c
 where i.indisprimary=true
 and i.indrelid =c.oid
 and n.oid = c.relnamespace
)  pk on tm.tableid=pk.tableid
-- dist key
left join
(  select
-- close off the col defs after the primary key
')\n' ||
'distkey('|| cast(column_name as varchar(100)) ||')'  as distkey, t.tableid
from information_schema.columns c
join
(-- need tableid
SELECT substring(n.nspname,1,100) as schemaname, substring(c.relname,1,100) as tablename, c.oid as tableid
FROM pg_namespace n, pg_class c
WHERE n.oid = c.relnamespace
AND nspname NOT IN ('pg_catalog', 'pg_toast', 'information_schema')
) t on c.table_schema= t.schemaname and c.table_name=t.tablename
join
-- gives dist col
(select attrelid as tableid, attname as colname from pg_attribute a where
a.attnum > 0 AND NOT a.attisdropped  AND a.attisdistkey = 't'
) d on t.tableid=d.tableid and c.column_name=d.colname

) d on tm.tableid=d.tableid
where tm.schemaname||'.'||tm.tablename='public.source_table_name'