I am creating a table like
create table tablename
as
select * for table2
I am getting the error
ORA-01652 Unable to extend temp segment by in tablespace
When I googled I usually found ORA-01652 error showing some value like
Unable to extend temp segment by 32 in tablespace
I am not getting any such value.I ran this query
select
fs.tablespace_name "Tablespace",
(df.totalspace - fs.freespace) "Used MB",
fs.freespace "Free MB",
df.totalspace "Total MB",
round(100 * (fs.freespace / df.totalspace)) "Pct. Free"
from
(select
tablespace_name,
round(sum(bytes) / 1048576) TotalSpace
from
dba_data_files
group by
tablespace_name
) df,
(select
tablespace_name,
round(sum(bytes) / 1048576) FreeSpace
from
dba_free_space
group by
tablespace_name
) fs
where
df.tablespace_name = fs.tablespace_name;
Taken from: Find out free space on tablespace
and I found that the tablespace I am using currently has around 32Gb of free space. I even tried creating table like
create table tablename tablespace tablespacename
as select * from table2
but I am getting the same error again. Can anyone give me an idea, where the problem is and how to solve it. For your information the select statement would fetch me 40,000,000 records.
I found the solution to this. There is a temporary tablespace called TEMP which is used internally by database for operations like distinct, joins,etc. Since my query(which has 4 joins) fetches almost 50 million records the TEMP tablespace does not have that much space to occupy all data. Hence the query fails even though my tablespace has free space.So, after increasing the size of TEMP tablespace the issue was resolved. Hope this helps someone with the same issue. Thanks :)