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whenever SQLERROR exit SQL.SQLCODE
set feeback off
...
exit SQL.SQLCODE

*SQLPlus often formats white space in output using tab characters, not
+ spaces... "set tab off" prevents this

$result=`sqlplus -s user/pass \@myfile`;
if($result=~/(?:SP2|ORA)/){
  print "SQL ERROR: $result\n";
}