ABAP Select data from SAP table REEX_CFG_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REEX_CFG_HEADER
*  INTO TABLE @DATA(IT_REEX_CFG_HEADER2).
*--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_REEX_CFG_HEADER INDEX 1 INTO DATA(WA_REEX_CFG_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REEX_CFG_HEADER>-DBERBIS = 1.
<REEX_CFG_HEADER>-SULTBIS = 1.
<REEX_CFG_HEADER>-DBERVON = 1.
<REEX_CFG_HEADER>-SEXCLVON = 1.
<REEX_CFG_HEADER>-SULTVON = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REEX_CFG_HEADER-DEFSZ, sy-vline,
  WA_REEX_CFG_HEADER-DELFZ, sy-vline,
  WA_REEX_CFG_HEADER-DBLFZ, sy-vline,
  WA_REEX_CFG_HEADER-SULTDBLFZ, sy-vline,
  WA_REEX_CFG_HEADER-SINCL, sy-vline,
  WA_REEX_CFG_HEADER-WWHR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REEX_CFG_HEADER 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_REEX_CFG_HEADER 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_REEX_CFG_HEADER INTO WA_REEX_CFG_HEADER.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_REEX_CFG_HEADER_STR, 
DBERBIS TYPE STRING,
SULTBIS TYPE STRING,
DBERVON TYPE STRING,
SEXCLVON TYPE STRING,
SULTVON TYPE STRING,
DEFSZ TYPE STRING,
DELFZ TYPE STRING,
DBLFZ TYPE STRING,
SULTDBLFZ TYPE STRING,
SINCL TYPE STRING,
WWHR TYPE STRING,
REINH TYPE STRING,
RTYPE TYPE STRING,
SFIXING TYPE STRING,
JSOFTILG TYPE STRING,
SIRAPLANSTRATEGY TYPE STRING,
RANTYP TYPE STRING,
TILGART TYPE STRING,
ACCINT TYPE STRING,
SKOGRP TYPE STRING,
BUKRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REEX_CFG_HEADER_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_REEX_CFG_HEADER_STR-DBERBIS sy-vline 
WA_REEX_CFG_HEADER_STR-SULTBIS sy-vline 
WA_REEX_CFG_HEADER_STR-DBERVON sy-vline 
WA_REEX_CFG_HEADER_STR-SEXCLVON sy-vline 
WA_REEX_CFG_HEADER_STR-SULTVON sy-vline 
WA_REEX_CFG_HEADER_STR-DEFSZ sy-vline 
WA_REEX_CFG_HEADER_STR-DELFZ sy-vline 
WA_REEX_CFG_HEADER_STR-DBLFZ sy-vline 
WA_REEX_CFG_HEADER_STR-SULTDBLFZ sy-vline 
WA_REEX_CFG_HEADER_STR-SINCL sy-vline 
WA_REEX_CFG_HEADER_STR-WWHR sy-vline 
WA_REEX_CFG_HEADER_STR-REINH sy-vline 
WA_REEX_CFG_HEADER_STR-RTYPE sy-vline 
WA_REEX_CFG_HEADER_STR-SFIXING sy-vline 
WA_REEX_CFG_HEADER_STR-JSOFTILG sy-vline 
WA_REEX_CFG_HEADER_STR-SIRAPLANSTRATEGY sy-vline 
WA_REEX_CFG_HEADER_STR-RANTYP sy-vline 
WA_REEX_CFG_HEADER_STR-TILGART sy-vline 
WA_REEX_CFG_HEADER_STR-ACCINT sy-vline 
WA_REEX_CFG_HEADER_STR-SKOGRP sy-vline 
WA_REEX_CFG_HEADER_STR-BUKRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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