PL/SQL External Procedures (ExtProc)
---------------------------------------------------------------------------------------------------
LISTENER MODES
The Listener can be configured in one of three modes (as configured in listener.ora)
Database
Provides network access to an Oracle database instance
PLSExtProc
Method for PL/SQL packages to access operating system executables
Executable
Provides network access to operating system executables
The "Database" mode is the most widely used mode and is the standard mode used by every database for connectivity. "PLSExtProc" allows PL/SQL database packages to access external programs and is configured by default for many instances. "Executable" mode allows an external program to be defined and accessed through a TNS connection. There is little documentation on this mode and is almost exclusively used by Oracle products, such as the Oracle E-Business Suite and Oracle Collaboration Suite.
EX> listener.ora
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = testdb1)(PORT = 1521))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
)
)
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /apps/oracle/product/10.2.0)
(PROGRAM = extproc)
)
)
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