Sqlplus invoking ksh shell code

Question

I have the following code:
sqlplus -s / <<EOT
SET PAGESIZE 0
SET FEEDBACK OFF
SET VERIFY OFF
spool grant.sql
SELECT 'GRANT SELECT ON ' || u.owner || '.' || u.object_name ||' TO xxx_role;'
FROM dba_objects u WHERE u.object_type IN ('TABLE','VIEW','SEQUENCE')
and owner = 'YYY';
spool off
EOT
Is there a way in the SQL block above I can test to see if my spool file contains data instead of invoking sqlplus again to run the spool file?
I would like to do something like this in the first block if possible or something very similiar.
As this will be run in a loop and will be passed values I want to make it go as quick as possible
and therefore limit the number of times I need to startup SQLPLUS
if [ -s spool.sql ]
then
@@spool.sql
fi

Answer 1

Assuming you are calling the first script fromm a shell script, then something like:
/export/home/oracle> cat t.sh
sqlplus -s / <<EOT
SET PAGESIZE 0
SET FEEDBACK OFF
SET VERIFY OFF
spool grant.sql
SELECT 'GRANT SELECT ON ' || u.owner || '.' || u.object_name ||' TO xxx_role;'
FROM dba_objects u WHERE u.object_type IN ('TABLE','VIEW','SEQUENCE')
and owner = 'YYY';
spool off
EOT
if [ -s grant.sql ]; then
  echo 'Run grants.sql'
else
  echo 'no grants'
fiWhen you run it it gives:
/export/home/oracle> ./t.sh
no grantsJust substitute another here document for the echo run grants.sql line. If you are passing parameters to the shell script, then substitute thos for the hard coded bits.
John