ABAP Select data from SAP table RELX1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RELX1 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 RELX1. 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 RELX1 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_RELX1 TYPE STANDARD TABLE OF RELX1,
      WA_RELX1 TYPE RELX1,
      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: <RELX1> TYPE RELX1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RELX1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RELX1
  INTO TABLE IT_RELX1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RELX1
*  INTO TABLE @DATA(IT_RELX12).
*--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_RELX1 INDEX 1 INTO DATA(WA_RELX12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RELX1 ASSIGNING <RELX1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RELX1>-RAHMEN_GL1 = 1.
<RELX1>-RAHMEN_GL2 = 1.
<RELX1>-RAHMEN1 = 1.
<RELX1>-RAHMEN2 = 1.
<RELX1>-OBJEKTL_T = 1.

ENDLOOP.

LOOP AT IT_RELX1 INTO WA_RELX1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RELX1-FRAME_TITLE1, sy-vline,
  WA_RELX1-FRAME_TITLE2, sy-vline,
  WA_RELX1-ABLESGR_TX, sy-vline,
  WA_RELX1-SPARTE_TX, sy-vline,
  WA_RELX1-BUKRS_TX, sy-vline,
  WA_RELX1-WEITDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RELX1 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_RELX1 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_RELX1 INTO WA_RELX1.


*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_RELX1_STR, 
RAHMEN_GL1 TYPE STRING,
RAHMEN_GL2 TYPE STRING,
RAHMEN1 TYPE STRING,
RAHMEN2 TYPE STRING,
OBJEKTL_T TYPE STRING,
FRAME_TITLE1 TYPE STRING,
FRAME_TITLE2 TYPE STRING,
ABLESGR_TX TYPE STRING,
SPARTE_TX TYPE STRING,
BUKRS_TX TYPE STRING,
WEITDAT TYPE STRING,
ORGOBJ_DY TYPE STRING,
PORTION_DY TYPE STRING,
ABLEINH_T TYPE STRING,
PARTNER_DY TYPE STRING,
VERTRAG_T TYPE STRING,
ANLAGE_T TYPE STRING,
GERAET_T TYPE STRING,
BEGABL TYPE STRING,
BEGABR TYPE STRING,
VERTRAG TYPE STRING,
ANLAGE TYPE STRING,
MARKIERUNG TYPE STRING,
RAHM41021 TYPE STRING,
RAHM41022 TYPE STRING,
RAHM41023 TYPE STRING,
RAHM41024 TYPE STRING,
RAHM41025 TYPE STRING,
AKTIONEN_T TYPE STRING,
KARENZ_TX TYPE STRING,
IGNORE_PREP_TX TYPE STRING,
TERMINSATZ_TX TYPE STRING,
PM_AUFTRAG_TX TYPE STRING,
VSTELLE_T TYPE STRING,
HAUS_T TYPE STRING,
SAMMELKT TYPE STRING,
FUEHRABL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RELX1_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_RELX1_STR-RAHMEN_GL1 sy-vline 
WA_RELX1_STR-RAHMEN_GL2 sy-vline 
WA_RELX1_STR-RAHMEN1 sy-vline 
WA_RELX1_STR-RAHMEN2 sy-vline 
WA_RELX1_STR-OBJEKTL_T sy-vline 
WA_RELX1_STR-FRAME_TITLE1 sy-vline 
WA_RELX1_STR-FRAME_TITLE2 sy-vline 
WA_RELX1_STR-ABLESGR_TX sy-vline 
WA_RELX1_STR-SPARTE_TX sy-vline 
WA_RELX1_STR-BUKRS_TX sy-vline 
WA_RELX1_STR-WEITDAT sy-vline 
WA_RELX1_STR-ORGOBJ_DY sy-vline 
WA_RELX1_STR-PORTION_DY sy-vline 
WA_RELX1_STR-ABLEINH_T sy-vline 
WA_RELX1_STR-PARTNER_DY sy-vline 
WA_RELX1_STR-VERTRAG_T sy-vline 
WA_RELX1_STR-ANLAGE_T sy-vline 
WA_RELX1_STR-GERAET_T sy-vline 
WA_RELX1_STR-BEGABL sy-vline 
WA_RELX1_STR-BEGABR sy-vline 
WA_RELX1_STR-VERTRAG sy-vline 
WA_RELX1_STR-ANLAGE sy-vline 
WA_RELX1_STR-MARKIERUNG sy-vline 
WA_RELX1_STR-RAHM41021 sy-vline 
WA_RELX1_STR-RAHM41022 sy-vline 
WA_RELX1_STR-RAHM41023 sy-vline 
WA_RELX1_STR-RAHM41024 sy-vline 
WA_RELX1_STR-RAHM41025 sy-vline 
WA_RELX1_STR-AKTIONEN_T sy-vline 
WA_RELX1_STR-KARENZ_TX sy-vline 
WA_RELX1_STR-IGNORE_PREP_TX sy-vline 
WA_RELX1_STR-TERMINSATZ_TX sy-vline 
WA_RELX1_STR-PM_AUFTRAG_TX sy-vline 
WA_RELX1_STR-VSTELLE_T sy-vline 
WA_RELX1_STR-HAUS_T sy-vline 
WA_RELX1_STR-SAMMELKT sy-vline 
WA_RELX1_STR-FUEHRABL sy-vline      INTO ld_text SEPARATED BY SPACE.

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