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Oracle® Call Interface Programmer's Guide
10g Release 1 (10.1)

Part Number B10779-01
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Introduction to External Procedure and Cartridge Services Functions

This chapter first describes the OCI external procedure functions. These functions enable users of external procedures to raise errors, allocate some memory, and get OCI context information.

See Also:

For more information about using these functions in external procedures, see the chapter on external routines in Oracle Database Application Developer's Guide - Fundamentals

Then the cartridge services functions are described.

See Also:

For more information about using these functions, see Oracle Data Cartridge Developer's Guide

The Function Syntax

For each function, the following information is listed:


A brief description of the action performed by the function.


The function declaration.


A description of each of the function's parameters. This includes the parameter's mode. The mode of a parameter has three possible values, as described next:

Table 19-1 Mode of a Parameter  
Mode Description


A parameter that passes data to the OCI


A parameter that receives data from the OCI on this call


A parameter that passes data on the call and receives data on the return from this or a subsequent call.


More detailed information about the function (if available). This may include restrictions on the use of the function, or other information that might be useful when using the function in an application.


A list of possible return values for the function.

Related Functions

A list of related function calls. For cartridge services, see all the other functions in the group being documented.

Return Codes

Success and error return codes are defined for certain external procedure interface functions. If a particular interface function returns OCIEXTPROC_SUCCESS or OCIEXTPROC_ERROR, then applications must use these macros to check for return values.

With_Context Type

The C callable interface to PL/SQL external procedures requires the with_context parameter to be passed. The type of this structure is OCIExtProcContext, which is opaque to the user.

The user can declare the with_context parameter in the application as

OCIExtProcContext *with_context;