ABAP Select data from SAP table RFVISADDEMAND2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFVISADDEMAND2 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 RFVISADDEMAND2. 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 RFVISADDEMAND2 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_RFVISADDEMAND2 TYPE STANDARD TABLE OF RFVISADDEMAND2,
      WA_RFVISADDEMAND2 TYPE RFVISADDEMAND2,
      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: <RFVISADDEMAND2> TYPE RFVISADDEMAND2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFVISADDEMAND2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFVISADDEMAND2
  INTO TABLE IT_RFVISADDEMAND2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFVISADDEMAND2
*  INTO TABLE @DATA(IT_RFVISADDEMAND22).
*--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_RFVISADDEMAND2 INDEX 1 INTO DATA(WA_RFVISADDEMAND22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFVISADDEMAND2 ASSIGNING <RFVISADDEMAND2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFVISADDEMAND2>-JDELETE = 1.
<RFVISADDEMAND2>-INTRENO = 1.
<RFVISADDEMAND2>-AUTHGRP = 1.
<RFVISADDEMAND2>-PROCESSMARK = 1.
<RFVISADDEMAND2>-PRESELECTION = 1.

ENDLOOP.

LOOP AT IT_RFVISADDEMAND2 INTO WA_RFVISADDEMAND2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFVISADDEMAND2-PROCESSSTAT, sy-vline,
  WA_RFVISADDEMAND2-PARTFROM, sy-vline,
  WA_RFVISADDEMAND2-PARTWHY, sy-vline,
  WA_RFVISADDEMAND2-PARTWAY, sy-vline,
  WA_RFVISADDEMAND2-DAPPLY, sy-vline,
  WA_RFVISADDEMAND2-SCRDSTNDG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFVISADDEMAND2 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_RFVISADDEMAND2 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_RFVISADDEMAND2 INTO WA_RFVISADDEMAND2.


*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 WBSAREAKEY
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RFVISADDEMAND2-WBSAREAKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVISADDEMAND2-WBSAREAKEY.
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_RFVISADDEMAND2_STR, 
JDELETE TYPE STRING,
INTRENO TYPE STRING,
AUTHGRP TYPE STRING,
PROCESSMARK TYPE STRING,
PRESELECTION TYPE STRING,
PROCESSSTAT TYPE STRING,
PARTFROM TYPE STRING,
PARTWHY TYPE STRING,
PARTWAY TYPE STRING,
DAPPLY TYPE STRING,
SCRDSTNDG TYPE STRING,
XCRDSTNDG TYPE STRING,
NNUMPERS TYPE STRING,
XPASSPORT TYPE STRING,
DPASSSUB TYPE STRING,
JWBS TYPE STRING,
DWBS TYPE STRING,
DWBSVALID TYPE STRING,
DWBSREFUSE TYPE STRING,
WBSPRIORITY TYPE STRING,
WBSPERSON TYPE STRING,
WBSAPPEND TYPE STRING,
WBSNROOMFULL TYPE STRING,
WBSNROOMHALF TYPE STRING,
WBSAREAKEY TYPE STRING,
WBSPSIZE TYPE STRING,
WBSREFERENCE TYPE STRING,
WBSMEMO TYPE STRING,
INCOME_CUR TYPE STRING,
NET_INCOME TYPE STRING,
NATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFVISADDEMAND2_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_RFVISADDEMAND2_STR-JDELETE sy-vline 
WA_RFVISADDEMAND2_STR-INTRENO sy-vline 
WA_RFVISADDEMAND2_STR-AUTHGRP sy-vline 
WA_RFVISADDEMAND2_STR-PROCESSMARK sy-vline 
WA_RFVISADDEMAND2_STR-PRESELECTION sy-vline 
WA_RFVISADDEMAND2_STR-PROCESSSTAT sy-vline 
WA_RFVISADDEMAND2_STR-PARTFROM sy-vline 
WA_RFVISADDEMAND2_STR-PARTWHY sy-vline 
WA_RFVISADDEMAND2_STR-PARTWAY sy-vline 
WA_RFVISADDEMAND2_STR-DAPPLY sy-vline 
WA_RFVISADDEMAND2_STR-SCRDSTNDG sy-vline 
WA_RFVISADDEMAND2_STR-XCRDSTNDG sy-vline 
WA_RFVISADDEMAND2_STR-NNUMPERS sy-vline 
WA_RFVISADDEMAND2_STR-XPASSPORT sy-vline 
WA_RFVISADDEMAND2_STR-DPASSSUB sy-vline 
WA_RFVISADDEMAND2_STR-JWBS sy-vline 
WA_RFVISADDEMAND2_STR-DWBS sy-vline 
WA_RFVISADDEMAND2_STR-DWBSVALID sy-vline 
WA_RFVISADDEMAND2_STR-DWBSREFUSE sy-vline 
WA_RFVISADDEMAND2_STR-WBSPRIORITY sy-vline 
WA_RFVISADDEMAND2_STR-WBSPERSON sy-vline 
WA_RFVISADDEMAND2_STR-WBSAPPEND sy-vline 
WA_RFVISADDEMAND2_STR-WBSNROOMFULL sy-vline 
WA_RFVISADDEMAND2_STR-WBSNROOMHALF sy-vline 
WA_RFVISADDEMAND2_STR-WBSAREAKEY sy-vline 
WA_RFVISADDEMAND2_STR-WBSPSIZE sy-vline 
WA_RFVISADDEMAND2_STR-WBSREFERENCE sy-vline 
WA_RFVISADDEMAND2_STR-WBSMEMO sy-vline 
WA_RFVISADDEMAND2_STR-INCOME_CUR sy-vline 
WA_RFVISADDEMAND2_STR-NET_INCOME sy-vline 
WA_RFVISADDEMAND2_STR-NATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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