Natural for DB2 supports the writing and executing of Natural stored procedures and Natural user-defined functions (Natural UDFs).
Natural stored procedures are user-written programs that are invoked
by the SQL statement CALL and executed by DB2 in the SPAS (Stored
Procedure Address Space). SPAS is a separate address space reserved for stored
procedures.
A function is an operation denoted by a function name followed by zero or more operands that are enclosed in parentheses. A function represents a relationship between a set of input values and a set of result values. If a function has been implemented by a user-written program, DB2 refers to it as a user-defined function (UDF).
The following topics are covered below:
There are two types of Natural used defined functions (UDF):
The scalar UDF accepts several input arguments and returns one output value. It can be invoked by any SQL statement like a DB2 built-in-function.
The table UDF accepts several input arguments and returns a set of output values comprising one table row during each invocation.
You invoke a table UDF with a Natural SQL
SELECT statement
by specifying the table-function name in the
FROM
Clause. A table UDF performs as a DB2 table and is invoked
for each FETCH operation for the table-function specified in the
SELECT
statement.
The PARAMETER STYLE identifies the linkage convention
used to pass parameters to a DB2 stored procedure or a DB2 user defined
functions (UDFs).
This section describes the PARAMETER STYLEs and the
STCB Natural for DB2 uses for processing Natural for DB2 stored procedures or
Natural UDFs.
Note:PARAMETER STYLE GENERAL (or GENERAL WITH
NULL) and STCB
Layout only apply to Natural stored procedures.
Note:
Only applies to Natural stored procedures.
A Natural stored procedure defined with PARAMETER STYLE
GENERAL only receives the user parameters specified.
A Natural stored procedure defined with PARAMETER STYLE
GENERAL WITH NULL receives the user parameters specified and,
additionally, a NULL indicator array that contains one
NULL indicator for each user parameter.
Natural stored procedures defined with PARAMETER STYLE
GENERAL/PARAMETER STYLE GENERAL WITH NULL require that the
definition of the stored procedure within the DB2 catalog includes one
additional parameter of the type VARCHAR in front of the
user parameters of the stored procedure.
This parameter in front of the parameters is the Stored Procedure Control Block (STCB); see also STCB Layout.
Below is information on:
The Stored Procedure Control Block (STCB) contains information the Natural for DB2 server stub uses to execute Natural stored procedures, such as the library and the subprogram to be invoked. It also contains the format descriptions of the parameters passed to the stored procedure.
The STCB is invisible to the Natural stored procedure called. The STCB is evaluated by the Natural for DB2 server stub and stripped off the parameter list that is passed to the Natural stored procedure.
If the caller of a Natural stored procedure defined with
PARAMETER STYLE GENERAL/PARAMETER STYLE GENERAL WITH
NULL is a Natural program, the program must use a Natural SQL
CALLDBPROC
statement with the keyword
CALLMODE=NATURAL.
If the caller of the Natural stored procedure is not a
Natural program, the caller has to set up the STCB for the DB2
CALL statement and pass the STCB as the first parameter.
If an error occurs during the execution of a Natural stored
procedure defined with PARAMETER STYLE GENERAL/PARAMETER
STYLE GENERAL WITH NULL, the error message text is returned to the
STCB.
If the caller is a Natural program that uses
CALLDBPROC and CALLMODE=NATURAL, the Natural for DB2
runtime will wrap up the error text in the NAT3286 error message.
In the Natural stored procedure, define the parameters as shown in the example program below:
DEFINE DATA PARAMETER 01 P1 ... 01 P2 ... ... ... 01 Pn ... LOCAL ... ... END-DEFINE
In the Natural stored procedure, define the parameters as shown in the example program below:
DEFINE DATA PARAMETER 01 P1 ... 01 P2 ... ... ... 01 Pn ... 01 NULL-INDICATOR-ARRAY (I2/1:n) LOCAL ... ... END-DEFINE
Note:
Only applies to Natural stored procedures.
The following table describes the first parameter passed between
the caller and the Natural stored procedure if
CALLMODE=NATURAL
is specified in a Natural SQL CALLDBPROC statement.
| Name | Format | Processing Mode Server |
|---|---|---|
STCBL |
I2 | Input (size of following information) |
| Procedure Information | ||
STCBLENG |
A4 | Input (printable STCBL) |
STCBID |
A4 | Input (STCB) |
STCBVERS |
A4 | Input (version of STCB 310) |
STCBUSER |
A8 | Input (user ID) |
STCBLIB |
A8 | Input (library) |
STCBPROG |
A8 | Input (calling program) |
STCBPSW |
A8 | Unused (password) |
STCBSTNR |
A4 | Input (CALLDBPROC statement
number)
|
STCBSTPC |
A8 | Input (procedure called) |
STCBPANR |
A4 | Input (number of parameters) |
| Error Information | ||
STCBERNR |
A5 | Output (Natural error number) |
STCBSTAT |
A1 | Unused (Natural error status) |
STCBLIB |
A8 | Unused (Natural error library) |
STCBPRG |
A8 | Unused (Natural error program) |
STCBLVL |
A1 | Unused (Natural error level) |
STCBOTP |
A1 | Unused (error object type) |
STCBEDYL |
A2 | Output (error text length) |
STCBEDYT |
A88 | Output (error text) |
| A100 | Reserved for future use | |
| Parameter Information | ||
STCBPADE |
A variable | Input. See also PARAMETER DESCRIPTION (STCBPADE) below. |
PARAMETER DESCRIPTION contains a description for each parameter
passed to the Natural stored procedure consisting of parameter type, format
specification and length. Parameter type is the
AD
attribute of the Natural CALLNAT statement as described
in the Statements documentation.
Each parameter has the following format description element in the STCBPADE string
atl,p[,d1]....
where
a is an attribute
mark which specifies the parameter type:
| Mark | Type |
Equivalent |
Equivalent |
|---|---|---|---|
M |
modifiable | AD=M |
INOUT |
O |
non-modifiable | AD=O |
IN |
A |
input only | AD=A |
OUT |
t is one of the
following Natural format tokens:
l is an integer
denoting the length/scale of the field. For numeric and packed numeric fields,
l denotes the total number of digits of
the field that is, the sum of the digits left and right of the decimal point.
The Natural format N7.3 is, for example, represented by N10.3. See also the
table above.
p is an integer
denoting the precision of the field. It is usually 0, except for numeric and
packed fields where it denotes the number of digits right of the decimal point.
See also the table above.
d1 is also an
integer denoting the occurrences of the alphanumeric array (alphanumeric only).
See also the table above.
This descriptive/control parameter is invisible to the calling
Natural program and to the called Natural stored procedure, but it has to be
defined in the parameter definition of the stored procedure row with the
CREATE PROCEDURE statement and the DB2 PARAMETER STYLE
GENERAL/PARAMETER STYLE GENERAL WITH NULL.
The following table shows the number of parameters which have to
be defined with the CREATE PROCEDURE statement for a Natural
stored procedure defined with PARAMETER STYLE GENERAL depending on
the number of user parameters and whether the client (that is, the caller of a
stored procedure for DB2) and the server (that is, the stored procedure for
DB2) is written in Natural or in another standard programming host language.
n denotes the number of user
parameters.
| Client\Server | Natural | not Natural |
|---|---|---|
| Natural | n +
1
|
n (CALLMODE=NONE)
|
| non-Natural | n +
1
|
n
|
Note:PARAMETER DB2SQL applies to Natural stored
procedures and Natural UDFs.
A Natural stored procedure or Natural user defined function (UDF)
with PARAMETER STYLE DB2SQL first receives the user parameters
specified and then the parameters listed below, under Additional
Parameters Passed. For a Natural UDF, the input parameters are passed
before the output parameters.
A NULL indicator for each user parameter of the
CALL statement,
the SQLSTATE to be returned to DB2,
the qualified name of the Natural stored procedure or UDF,
the specific name of the Natural stored procedure or UDF,
the SQL DIAGNOSE field with a diagnostic string to be returned to DB2.
The SQLSTATE, the qualified name, the specific name and the
DIAGNOSE field are defined in the Natural parameter data area
(PDA) DB2SQL_P which is supplied in the Natural system library
SYSDB2.
If the optional feature SCRATCHPAD
nnn is specified additionally in the
CREATE FUNCTION statement for the Natural UDF, the
SCRATCHPAD storage parameter is passed to the Natural UDF.
Use the following definitions:
01 SCRATCHPAD A(4+nnn) 01 REDEFINE SCRATCHPAD 02 SCRATCHPAD_LENGTH(I4) 02 ...
Redefine the SCRATCHPAD in the Natural UDF according
to your requirements.
The first four bytes of the SCRATCHPAD area contain
an integer length field. Before initially invoking the Natural UDF with an SQL
statement, DB2 resets the SCRATCHPAD area to x'00'
and sets the size nnn specified for the
SCRATCHPAD into the first four bytes as an integer value.
Thereafter, DB2 does not reinitialize the SCRATCHPAD
between the invocations of the Natural UDF for the invoking SQL statement.
Instead, after returning from the Natural UDF, the contents of the
SCRATCHPAD is preserved and restored at the next invocation of the
Natural UDF.
Below is information on:
Note:
This parameter is optional and only applies to Natural
UDFs.
The CALL TYPE parameter is passed if the
FINAL CALL option is specified for a Natural scalar UDF, or if the
Natural UDF is a table UDF. The CALL TYPE parameter is an integer
indicating the type of call DB2 performs on the Natural UDF. See the
DB2 SQL GUIDE for details on the parameter values provided
in the CALL_TYPE parameter.
This parameter is optional.
If the option DBINFO is used, the
DBINFO structure is passed to the Natural stored procedure or UDF.
The DBINFO structure is described in the Natural PDA
DBINFO_P supplied in the Natural system library
SYSDB2.
The Natural for DB2 server stub determines the subprogram and the library from the qualified and specific name of the Natural stored procedure or UDF. The SCHEMA name is used as library name, and the procedure or function name is used as subprogram name.
The ROUTINEN subprogram is supplied in the Natural
system library SYSDB2. This subprogram is used to access the DB2
catalog to determine the formats of the user parameters defined for the Natural
stored procedure or UDF. After the formats have been determined, they are
stored in the Natural buffer pool. During subsequent invocations of the Natural
stored procedure, the formats are then retrieved from the Natural buffer pool.
This requires that at least READS SQL DATA is specified for
Natural stored procedures or UDFs with PARAMETER STYLE DB2SQL.
The ROUTINEN subprogram is generated statically.
The DBRM of ROUTINEN is bound as package in the COLLECTION
SAGNDBROUTINENPACK. Before starting to access the DB2 catalog, the
subprogram will save the CURRENT PACKAGESET and set
SAGNDBROUTINENPACK to CURRENT PACKAGESET. After
processing, the ROUTINEN subprogram will restore the CURRENT
PACKAGESET saved.
If the caller of the Natural stored procedure with
PARAMETER STYLE DB2SQL is a Natural program, the caller must use
the Natural SQL CALLDBPROC statement with
the specification CALLMODE=NATURAL,
which is the default.
If a Natural runtime error occurs during the execution of a
Natural stored procedure or UDF with PARAMETER STYLE DB2SQL,
SQLSTATE is set to 38N99 and the diagnostic string contains the
text of the Natural error message.
If an error occurs in the Natural for DB2 server stub during the
execution of the Natural stored procedure or UDF with PARAMETER STYLE
DB2SQL, the SQLSTATE is set to 38S99 and the diagnostic
string contains the text of the error message.
If the application wants to raise an error condition during the
execution of a Natural stored procedure or UDF, the SQLSTATE parameter must be
set to a value other than '00000'. See the DB2 SQL
Guide for specifications of user errors in the SQLSTATE
parameter.
Additionally, a text describing the errors can be placed in the
DIAGNOSE parameter.
If a Natural table UDF wants to signal to DB2 that it has found
no row to return, '02000' must be returned in the SQLSTATE
parameter.
For a Natural UDF that contains the attributes DISALLOW
PARALLEL and FINAL CALL, the Natural for DB2 server stub
retains the Natural session allocated earlier. This Natural session will then
be reused by all subsequent UDF invocations until Natural encounters the final
call.
In a Natural stored procedure, define the parameters as shown in the example program below:
DEFINE DATA PARAMETER 01 P1 ... 01 P2 ... ... ... 01 PN ... 01 N1 (I2) 01 N2 (I2) ... ... 01 N n (I2) PARAMETER USING DB2SQL_P [ PARAMETER USING DBINFO_P ] /* only if DBINFO is defined LOCAL ... ... END-DEFINE
In a Natural UDF, define the parameters as shown in the example program below:
DEFINE DATA PARAMETER 01 PI1 ... /* first input parameter 01 PI2 ... ... ... 01 PIn ... /* last input parameter 01 RS1... /* first result parameter ... ... 01 RSn ... /* last result parameter 01 N_PI1 (I2) /* first NULL indicator 01 N_PI2 (I2) ... ... 01 N_Pin (I2) 01 N_RS1 (I2) ... ... 01 N_RSn (I2) /* last NULL indicator PARAMETER USING DB2SQL_P /* function, specific, sqlstate, diagnose PARAMETER 01 SCRATCHPAD A(4+nnn) /* only if SCRATCHPAD nnn is specified 01 REDEFINES SCRATCHPAD 02 SCRATCHPAD_LENGTH (I4) 02 ... 01 CALL_TYPE (I4) /* --- only if FINAL CALL is specified or table UDF PARAMETER USING DBINFO_P /* ---- only if DBINFO is specified LOCAL ... ... END-DEFINE
This section provides a general guideline of how to write a Natural Stored Procedure and what to consider when writing it.
To write a Natural stored procedure
Determine the format and attributes of the parameters that are passed between the caller and the stored procedure. Consider creating a Natural parameter data area (PDA). Stored procedures do not support data groups and redefinition within their parameters.
Determine the PARAMETER STYLE of the stored
procedure: GENERAL, GENERAL WITH NULL or
DB2SQL.
If you use GENERAL WITH NULL, append the
parameters to the Natural stored procedure by defining a NULL
indicator array that contains a NULL indicator (I2) for each other
parameter.
If you use DB2SQL, append the parameters of
the Natural stored procedure by defining NULL indicators (one for
each parameter), include the PDA DB2SQL_P and the PDA
DBINFO_P (only with DBINFO specified), if desired.
See also the relevant DB2 literature by IBM.
Decide which and how many result sets the stored procedure will return to the caller.
Code your stored procedure as a Natural subprogram.
Returning result sets
To return result sets, code a Natural SQL
SELECT statement
with the WITH RETURN option.
To return the whole result set, code an
ESCAPE
BOTTOM statement immediately after the SELECT
statement.
To return part of the result set code, an IF
*COUNTER = 1 ESCAPE TOP END-IF immediately following the
SELECT statement. This ensures that you do not process the first
empty row that is returned by the SELECT WITH RETURN statement. To
stop row processing, execute an ESCAPE BOTTOM statement.
If you do not leave the processing loop initiated by the
SELECT WITH RETURN via ESCAPE BOTTOM, the result set
created is closed and nothing is returned to the caller.
Attention when accessing other databases
You can access other databases (for instance Adabas)
within a Natural stored procedure. However, keep in mind that your access to
other databases is synchronized neither with the updates done by the caller of
the stored procedure, nor with the updates done against DB2 within the stored
procedure.
Natural for DB2 handling of COMMIT and ROLLBACK
statements
DB2 does not allow a stored procedure to issue Natural
SQL COMMIT or
ROLLBACK
statements (the execution of those statements puts the caller into a
must-rollback state). Therefore, the Natural for DB2 runtime handles those
statements as follows when they are issued from a stored procedure:
COMMIT against DB2 will be skipped. This
allows the stored procedure to commit Adabas updates without getting a
must-rollback state from DB2.
ROLLBACK against DB2 will be skipped if it
is created by Natural itself.
ROLLBACK against DB2 will be executed if it
is user-programmed. Thus, after a Natural error, the caller receives the
Natural error information and not the unqualified must-rollback state.
Additionally, this function ensures that, if the user program backs out the
transaction, every database transaction of the stored procedure is backed
out.
For DB2 UDB: Issue a
CREATE PROCEDURE statement that defines your stored procedure, for
example:
CREATE PROCEDURE <PROCEDURE> (INOUT STCB VARCHAR(274+13*N), INOUT <PARM1> <FORMAT>, INOUT <PARM2> <FORMAT>, INOUT <PARM3> <FORMAT> . ) DYNAMIC RESULT SET <RESULT_SETS> EXTERNAL NAME <LOADMOD> LANGUAGE ASSEMBLE PROGRAM TYPE <PGM_TYPE> PARAMETER STYLE GENERAL <WITH NULLS depending on LINKAGE>;
The data specified in angle brackets (< >) correspond
to the data listed in the
table
above, PARM1 - PARM3 and FORMAT depend
on the call parameter list of the stored procedure. See also
Example Stored Procedure
NDBPURGN, Member CR6PURGN.
Code your Natural program invoking the stored procedure via
the Natural SQL CALLDBPROC statement.
Code the parameters in the CALLDBPROC statement
in the same sequence as they are specified in the stored procedure. Define the
parameters in the calling program in a format that is compatible with the
format defined in the stored procedure.
If you use result sets, specify a
RESULT
SETS clause in the CALLDBPROC statement
followed by a number of result set locator variables of FORMAT
(I4). The number of result set locator variables should be the same as
the number or result sets created by the stored procedure. If you specify fewer
than are created, some result sets are lost. If you specify more than are
created, the remaining result set locator variables are lost. The sequence of
locator variables corresponds to the sequence in which the result sets are
created by the stored procedure.
Keep in mind that the fields into which the result set rows
are read have to correspond to the fields used in the SELECT WITH
RETURN statement that created the result set.
This section provides a general guideline of how to write a Natural user defined function (UDF) and what to consider when writing it.
See also the section Writing a Natural Stored Procedure.
To write a Natural UDF
Determine the format and attributes of the parameters, which are passed between the caller and the stored procedure.
Create a Natural parameter data area (PDA).
Append the parameter definitions of the Natural UDF by
defining NULL indicators (one for each parameter) and include the
PDA DB2SQL_P.
If required, code a SCRATCHPAD area in the
parameter list.
If required, code a call-type parameter. If you have specified
DBINFO, include the PDA DBINFO_P. See also the
relevant DB2 literature by IBM.
Code your UDF as a Natural subprogram and consider the following:
Attention when accessing other databases
You can access other databases (for example, Adabas)
within a Natural UDF. However, keep in mind that your access to other databases
is synchronized neither with the updates done by the caller of the stored
procedure, nor with the updates done against DB2 within the stored
procedure.
Natural for DB2 handling of COMMIT and ROLLBACK
statements
DB2 does not allow a stored procedure to issue
COMMIT or
ROLLBACK
statements; the execution of these statements results in a must-rollback state.
If a Natural stored procedure issues a COMMIT or
ROLLBACK, the Natural for DB2 runtime processes these statements
as follows:
COMMIT against DB2 is skipped. This allows
the stored procedure to commit Adabas updates without entering a must-rollback
state by DB2.
ROLLBACK against DB2 is skipped if it is
implicitly issued by the Natural runtime.
ROLLBACK against DB2 is executed if it is
user-programmed. Thus, after a Natural error, the caller receives a
corresponding Natural error message text, but does not enter an unqualified
must-rollback state. Additionally, this reaction ensures that every database
transaction the stored procedure performs is backed out if the user program
backs out the transaction.
Issue a CREATE FUNCTION statement that defines
your UDF, for example:
CREATE FUNCTION <FUNCTION> ([PARM1] <FORMAT>, [PARM2] <FORMAT>, [PARM3] <FORMAT> ) RETURNS <FORMAT> EXTERNAL NAME <LOADMOD> LANGUAGE ASSEMBLE PROGRAM TYPE <PGM TYPE> PARAMETER STYLE DB2SQL . . .;
In the example above, the variable data are enclosed in angle brackets (< >) and refer to the keywords preceding the brackets. Specify a valid value, for example:
LOADMOD denotes the Natural for DB2 server stub
module, for example, NDBvrSRV, where
vr stands for the Natural version number.
PARM1 - PARM3 and FORMAT relate to the
call parameter list of the UDF. See also the
Example Natural User
Defined Function.
Code a Natural program containing SQL statements that invoke the UDF.
Specify the parameters of the Natural UDF invocation in the same sequence as specified in the Natural UDF definition. The format of the parameters in the calling program must be compatible with the format defined in the Natural UDF.
This section describes the example stored procedure
NDBPURGN, a Natural subprogram which purges Natural objects from
the buffer pool used by the Natural stored procedures server.
The following topics are covered below:
The example stored procedure NDBPURGN comprises the
following text objects (members) which are stored in the Natural system library
SYSDB2:
| Object | Explanation |
|---|---|
CR6PURGN |
Input member (text object) for Contains SQL statements used to declare
|
NDBPURGP |
The client (Natural) program which
Ensure that the DB2 special register |
NDBPURGN |
The stored procedure which purges objects from the buffer pool.
Therefore, |
To define the example stored procedure NDBPURGN
Define the stored procedure in the DB2 catalog by using the
SQL statements provided as text objects CR5PURGN (for DB2 Version
5) and CR6PURGN (for DB2 Version 6).
Specify the name of the Natural stored procedure stub (here:
NDBvrSRV, where
vr stands for the Natural version number) as
LOADMOD (V5) or EXTERNAL NAME (V6). The Natural
stored procedure stub is generated during the installation by assembling the
NDBSTUB macro.
As the first parameter, pass the internal Natural parameter
STCB to the stored procedure. The
STCB parameter is a VARCHAR field which
contains information required to invoke the stored procedure in Natural:
The program name of the stored procedure and the library where it resides,
The description of the parameters passed to the stored procedure and
The error message created by Natural if the stored procedure fails during the execution.
The STCB parameter is generated
automatically by the
CALLMODE=NATURAL
clause of the Natural SQL CALLDBPROC statement and
is removed from the parameters passed to the Natural stored procedure by the
server stub. Thus, STCB is invisible to the caller and
the stored procedure. However, if a non-Natural client intends to call a
Natural stored procedure, the client has to pass the
STCB parameter explicitly. See also Stored
Procedure Control Block below.
Below is the Stored Procedure Control Block (STBC) generated by
the CALLMODE=NATURAL
clause as generated by the stored procedure NDBPURGN
before and after execution. Changed values are emphasized in
boldface:
004C82 0132F0F3 F0F6E2E3 C3C2F3F1 F040C8C7 *..0306STCB310 HG* 11097D42 004C92 D2404040 4040C8C7 D2404040 4040D5C4 *K SAG ND* 11097D52 004CA2 C2D7E4D9 C7D74040 40404040 4040F0F5 *BPURGP 05* 11097D62 004CB2 F7F0D5C4 C2D7E4D9 C7D5F0F0 F0F6F0F9 *70NDBPURGN000609* 11097D72 004CC2 F9F9F940 40404040 40404040 40404040 *999 * 11097D82 004CD2 40404040 40404040 40404040 40404040 * * 11097D92 004CE2 40404040 40404040 40404040 40404040 * * 11097DA2 004CF2 40404040 40404040 40404040 40404040 * * 11097DB2 004D02 40404040 40404040 40404040 40404040 * * 11097DC2 004D12 40404040 40404040 40404040 40404040 * * 11097DD2 004D22 40404040 40404040 40404040 40404040 * * 11097DE2 004D32 40404040 40404040 40404040 40404040 * * 11097DF2 004D42 40404040 40404040 40404040 40404040 * * 11097E02 004D52 40404040 40404040 40404040 40404040 * * 11097E12 004D62 40404040 40404040 40404040 40404040 * * 11097E22 004D72 40404040 40404040 40404040 40404040 * * 11097E32 004D82 40404040 40404040 40404040 40404040 * * 11097E42 004D92 40404040 D4C1F86B F0D4C1F4 F06BF0D4 * MA8,0MA40,0M* 11097E52 004DA2 C2F26BF0 D4C2F26B F0D4C9F2 6BF0D4C9 *I2,0MI2,0MI2,0MI* 11097E62 004DB2 F26BF04B *2,0. * 11097E72
004C82 0132F0F3 F0F6E2E3 C3C2F3F1 F040C8C7 *..0306STCB310 HG* 11097D42 004C92 D2404040 4040C8C7 D2404040 4040D5C4 *K SAG ND* 11097D52 004CA2 C2D7E4D9 C7D74040 40404040 4040F0F5 *BPURGP 05* 11097D62 004CB2 F7F0D5C4 C2D7E4D9 C7D5F0F0 F0F6F0F0 *70NDBPURGN000600* 11097D72 004CC2 F0F0F040 40404040 40404040 40404040 *000 * 11097D82 004CD2 40404040 40404040 40404040 40404040 * * 11097D92 004CE2 40404040 40404040 40404040 40404040 * * 11097DA2 004CF2 40404040 40404040 40404040 40404040 * * 11097DB2 004D02 40404040 40404040 40404040 40404040 * * 11097DC2 004D12 40404040 40404040 40404040 40404040 * * 11097DD2 004D22 40404040 40404040 40404040 40404040 * * 11097DE2 004D32 40404040 40404040 40404040 40404040 * * 11097DF2 004D42 40404040 40404040 40404040 40404040 * * 11097E02 004D52 40404040 40404040 40404040 40404040 * * 11097E12 004D62 40404040 40404040 40404040 40404040 * * 11097E22 004D72 40404040 40404040 40404040 40404040 * * 11097E32 004D82 40404040 40404040 40404040 40404040 * * 11097E42 004D92 40404040 D4C1F86B F0D4C1F4 F06BF0D4 * MA8,0MA40,0M* 11097E52 004DA2 C2F26BF0 D4C2F26B F0D4C9F2 6BF0D4C9 *I2,0MI2,0MI2,0MI* 11097E62 004DB2 F26BF04B *2,0. * 11097E72
This section describes the example user-defined function (UDF)
NAT.DEM2UDFN, a Natural subprogram used to calculate the product
of two numbers.
The example UDF NAT.DEM2UDF comprises the following
objects that are supplied in the Natural system library
SYSDB2:
| Object | Explanation |
|---|---|
DEM2CUDF |
Contains SQL statements used to create
DEM2UDFN (see below).
|
DEM2UDFP |
The client (Natural) program that
|
DEM2UDFN |
The UDF that builds the product of two numbers.
DEM2UDFN has to be copied to the Natural library NAT
on the Natural system file FUSER in the executing
environment.
|