ABAP Select data from SAP table RFVISADDEMAND into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFVISADDEMAND table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to RFVISADDEMAND. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the RFVISADDEMAND table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_RFVISADDEMAND TYPE STANDARD TABLE OF RFVISADDEMAND,
      WA_RFVISADDEMAND TYPE RFVISADDEMAND,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <RFVISADDEMAND> TYPE RFVISADDEMAND.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFVISADDEMAND.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFVISADDEMAND
  INTO TABLE IT_RFVISADDEMAND.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFVISADDEMAND
*  INTO TABLE @DATA(IT_RFVISADDEMAND2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_RFVISADDEMAND INDEX 1 INTO DATA(WA_RFVISADDEMAND2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFVISADDEMAND ASSIGNING <RFVISADDEMAND>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFVISADDEMAND>-SIDLDEMAND = 1.
<RFVISADDEMAND>-XMEMOTEXT = 1.
<RFVISADDEMAND>-SOBJGROUP = 1.
<RFVISADDEMAND>-SPARTID = 1.
<RFVISADDEMAND>-DFREEFROM = 1.

ENDLOOP.

LOOP AT IT_RFVISADDEMAND INTO WA_RFVISADDEMAND.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFVISADDEMAND-DFREETILL, sy-vline,
  WA_RFVISADDEMAND-CURRKEY, sy-vline,
  WA_RFVISADDEMAND-AREAKEY, sy-vline,
  WA_RFVISADDEMAND-SAQUISIT, sy-vline,
  WA_RFVISADDEMAND-PRENTEXCL, sy-vline,
  WA_RFVISADDEMAND-PRENTINCL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFVISADDEMAND you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_RFVISADDEMAND TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_RFVISADDEMAND INTO WA_RFVISADDEMAND.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit CUNIT, internal->external for field AREAKEY
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RFVISADDEMAND-AREAKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVISADDEMAND-AREAKEY.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RFVISADDEMAND_STR, 
SIDLDEMAND TYPE STRING,
XMEMOTEXT TYPE STRING,
SOBJGROUP TYPE STRING,
SPARTID TYPE STRING,
DFREEFROM TYPE STRING,
DFREETILL TYPE STRING,
CURRKEY TYPE STRING,
AREAKEY TYPE STRING,
SAQUISIT TYPE STRING,
PRENTEXCL TYPE STRING,
PRENTINCL TYPE STRING,
PRENTAREAEXCL TYPE STRING,
PRENTAREAINCL TYPE STRING,
PSIZEALL TYPE STRING,
PSIZEUSE TYPE STRING,
NROOMFULL TYPE STRING,
NROOMHALF TYPE STRING,
SFLOORCOD TYPE STRING,
JFLOOREXC TYPE STRING,
SLOCALGRP TYPE STRING,
STRAFFROU TYPE STRING,
DBUILDDAT TYPE STRING,
DRSTORDAT TYPE STRING,
SAGEGROUP TYPE STRING,
CFAFCODE TYPE STRING,
SPARKGRP TYPE STRING,
OCCUPOBLIGO TYPE STRING,
OCCUPOBLIGO2 TYPE STRING,
OCCUPOBLIGO3 TYPE STRING,
OCCUPOBLIGO4 TYPE STRING,
SCOUNTRY TYPE STRING,
SREGIO TYPE STRING,
SCOUNC TYPE STRING,
SCITYC TYPE STRING,
ZIPCODE TYPE STRING,
LOCATION TYPE STRING,
SUBLOCAT TYPE STRING,
STREET TYPE STRING,
JISPUBLIC TYPE STRING,
JAUTOINFO TYPE STRING,
ZIPSTRING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFVISADDEMAND_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_RFVISADDEMAND_STR-SIDLDEMAND sy-vline 
WA_RFVISADDEMAND_STR-XMEMOTEXT sy-vline 
WA_RFVISADDEMAND_STR-SOBJGROUP sy-vline 
WA_RFVISADDEMAND_STR-SPARTID sy-vline 
WA_RFVISADDEMAND_STR-DFREEFROM sy-vline 
WA_RFVISADDEMAND_STR-DFREETILL sy-vline 
WA_RFVISADDEMAND_STR-CURRKEY sy-vline 
WA_RFVISADDEMAND_STR-AREAKEY sy-vline 
WA_RFVISADDEMAND_STR-SAQUISIT sy-vline 
WA_RFVISADDEMAND_STR-PRENTEXCL sy-vline 
WA_RFVISADDEMAND_STR-PRENTINCL sy-vline 
WA_RFVISADDEMAND_STR-PRENTAREAEXCL sy-vline 
WA_RFVISADDEMAND_STR-PRENTAREAINCL sy-vline 
WA_RFVISADDEMAND_STR-PSIZEALL sy-vline 
WA_RFVISADDEMAND_STR-PSIZEUSE sy-vline 
WA_RFVISADDEMAND_STR-NROOMFULL sy-vline 
WA_RFVISADDEMAND_STR-NROOMHALF sy-vline 
WA_RFVISADDEMAND_STR-SFLOORCOD sy-vline 
WA_RFVISADDEMAND_STR-JFLOOREXC sy-vline 
WA_RFVISADDEMAND_STR-SLOCALGRP sy-vline 
WA_RFVISADDEMAND_STR-STRAFFROU sy-vline 
WA_RFVISADDEMAND_STR-DBUILDDAT sy-vline 
WA_RFVISADDEMAND_STR-DRSTORDAT sy-vline 
WA_RFVISADDEMAND_STR-SAGEGROUP sy-vline 
WA_RFVISADDEMAND_STR-CFAFCODE sy-vline 
WA_RFVISADDEMAND_STR-SPARKGRP sy-vline 
WA_RFVISADDEMAND_STR-OCCUPOBLIGO sy-vline 
WA_RFVISADDEMAND_STR-OCCUPOBLIGO2 sy-vline 
WA_RFVISADDEMAND_STR-OCCUPOBLIGO3 sy-vline 
WA_RFVISADDEMAND_STR-OCCUPOBLIGO4 sy-vline 
WA_RFVISADDEMAND_STR-SCOUNTRY sy-vline 
WA_RFVISADDEMAND_STR-SREGIO sy-vline 
WA_RFVISADDEMAND_STR-SCOUNC sy-vline 
WA_RFVISADDEMAND_STR-SCITYC sy-vline 
WA_RFVISADDEMAND_STR-ZIPCODE sy-vline 
WA_RFVISADDEMAND_STR-LOCATION sy-vline 
WA_RFVISADDEMAND_STR-SUBLOCAT sy-vline 
WA_RFVISADDEMAND_STR-STREET sy-vline 
WA_RFVISADDEMAND_STR-JISPUBLIC sy-vline 
WA_RFVISADDEMAND_STR-JAUTOINFO sy-vline 
WA_RFVISADDEMAND_STR-ZIPSTRING sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.