SAP KNA1_SINGLE_READER Function Module for Check Existence of a Customer Master Record by Customer Number

Search SAP Function Modules

KNA1_SINGLE_READER is a standard kna1 single reader SAP function module available within SAP R/3 or S/4 Hana systems, depending on your version and release level. It is used for Check Existence of a Customer Master Record by Customer Number processing and below is the pattern details for this FM, showing its interface including any import and export parameters, exceptions etc. there is also a full "cut and paste" ABAP pattern code example, along with implementation ABAP coding, documentation and contribution comments specific to this or related objects.

See here to view full function module documentation and code listing for kna1 single reader FM, simply by entering the name KNA1_SINGLE_READER into the relevant SAP transaction such as SE37 or SE38.

Function Group: VS01
Program Name: SAPLVS01
Main Program: SAPLVS01
Appliation area:
Release date: N/A
Mode(Normal, Remote etc): Normal Function Module
Update:

Function KNA1_SINGLE_READER pattern details

In-order to call this FM within your sap programs, simply using the below ABAP pattern details to trigger the function call...or see the full ABAP code listing at the end of this article. You can simply cut and paste this code into your ABAP progrom as it is, including variable declarations.

CALL FUNCTION 'KNA1_SINGLE_READER'"Check Existence of a Customer Master Record by Customer Number
  EXPORTING
   I_KUNNR =  "Customer Number
*  I_READ_CAM =  "Return CAS Address
*  I_RESET_BUFFER =  "Clear Buffer (Yes = X)
*  I_BYPASSING_BUFFER =  "Process Buffer (No = X)

 IMPORTING
   O_KNA1 =  "Results row
   O_ADDRESS_VALUE =  "CAS Address

EXCEPTIONS
   NOT_FOUND = 1    PARAMETER_ERROR = 2    INTERNAL_ERROR = 3 

.

IMPORTING Parameters details for KNA1_SINGLE_READER

I_KUNNR - Customer Number

Data type: KNA1-KUNNR
Optional: No
Call by Reference: No ( called with pass by value option)

I_READ_CAM - Return CAS Address

Data type:
Optional: Yes
Call by Reference: No ( called with pass by value option)

I_RESET_BUFFER - Clear Buffer (Yes = X)

Data type:
Optional: Yes
Call by Reference: No ( called with pass by value option)

I_BYPASSING_BUFFER - Process Buffer (No = X)

Data type:
Optional: Yes
Call by Reference: No ( called with pass by value option)

EXPORTING Parameters details for KNA1_SINGLE_READER

O_KNA1 - Results row

Data type: KNA1
Optional: No
Call by Reference: No ( called with pass by value option)

O_ADDRESS_VALUE - CAS Address

Data type: ADDR1_VAL
Optional: No
Call by Reference: Yes

EXCEPTIONS details

NOT_FOUND - No Entry Found

Data type:
Optional: No
Call by Reference: No ( called with pass by value option)

PARAMETER_ERROR - Error in parameters

Data type:
Optional: No
Call by Reference: No ( called with pass by value option)

INTERNAL_ERROR - Internal error

Data type:
Optional: No
Call by Reference: No ( called with pass by value option)

Copy and paste ABAP code example for KNA1_SINGLE_READER Function Module

The ABAP code below is a full code listing to execute function module POPUP_TO_CONFIRM including all data declarations. The code uses the original data declarations rather than the latest in-line data DECLARATION SYNTAX but I have included an ABAP code snippet at the end to show how declarations would look using the newer method of declaring data variables on the fly. This will allow you to compare and fully understand the new inline method. Please note some of the newer syntax such as the @DATA is not available until a later 4.70 service pack (SP8), which i why i have stuck to the origianl for this example.

ABAP code using 7.40 inline data declarations to call FM KNA1_SINGLE_READER

The below ABAP code uses the newer in-line data declarations. This allows you to see the coding differences/benefits of the later inline syntax. Please note some of the newer syntax below, such as the @DATA is not available until 4.70 EHP 8.

Search for further information about these or an SAP related objects