2026-03-12 20:23:15

tpt/aot/demo3.sql

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+-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
+-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
+
+--------------------------------------------------------------------------------
+--
+-- File name:   demo3.sql
+--
+-- Purpose:     Advanced Oracle Troubleshooting Seminar demo script
+--              Causes a session hang by reading from external table
+--              which in turn reads from a Unix named pipe. Before 11.1.0.7
+--              this wait was uninstrumented.
+--
+-- Author:      Tanel Poder ( http://www.tanelpoder.com )
+-- Copyright:   (c) Tanel Poder
+--
+-- Notes:       Meant to be executed from an Unix/Linux Oracle DB server
+--
+--------------------------------------------------------------------------------
+
+prompt Running demo3...
+
+set feedback off termout off
+
+CREATE OR REPLACE DIRECTORY mydir AS '/tmp';
+
+host rm -f /tmp/myfile
+
+host mknod /tmp/myfile p
+
+DROP TABLE mytab;
+
+CREATE TABLE mytab (
+	a int
+)
+ORGANIZATION EXTERNAL (
+	TYPE oracle_loader
+	DEFAULT DIRECTORY mydir
+	ACCESS PARAMETERS (
+		RECORDS DELIMITED BY NEWLINE
+		FIELDS TERMINATED BY ','
+	(a)
+	)
+	LOCATION ('myfile')
+)
+/
+
+select * from mytab;
+
+set feedback on termout on
+
+drop table mytab;
+