ABAP Select data from SAP table SELEX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SELEX
*  INTO TABLE @DATA(IT_SELEX2).
*--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_SELEX INDEX 1 INTO DATA(WA_SELEX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SELEX>-XEIA1 = 1.
<SELEX>-XEIA2 = 1.
<SELEX>-XEIB1 = 1.
<SELEX>-XEID1 = 1.
<SELEX>-XEID2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SELEX-XEID3, sy-vline,
  WA_SELEX-XEIE1, sy-vline,
  WA_SELEX-XEIE2, sy-vline,
  WA_SELEX-XEIK1, sy-vline,
  WA_SELEX-XEIL1, sy-vline,
  WA_SELEX-XEIP1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SELEX 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_SELEX 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_SELEX INTO WA_SELEX.


*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_SELEX_STR, 
XEIA1 TYPE STRING,
XEIA2 TYPE STRING,
XEIB1 TYPE STRING,
XEID1 TYPE STRING,
XEID2 TYPE STRING,
XEID3 TYPE STRING,
XEIE1 TYPE STRING,
XEIE2 TYPE STRING,
XEIK1 TYPE STRING,
XEIL1 TYPE STRING,
XEIP1 TYPE STRING,
XEIS1 TYPE STRING,
XEIV1 TYPE STRING,
XEIV2 TYPE STRING,
XEIV3 TYPE STRING,
XEIV4 TYPE STRING,
XEIF1 TYPE STRING,
XEIQ1 TYPE STRING,
XEIG1 TYPE STRING,
XEIC1 TYPE STRING,
XEIVE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SELEX_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_SELEX_STR-XEIA1 sy-vline 
WA_SELEX_STR-XEIA2 sy-vline 
WA_SELEX_STR-XEIB1 sy-vline 
WA_SELEX_STR-XEID1 sy-vline 
WA_SELEX_STR-XEID2 sy-vline 
WA_SELEX_STR-XEID3 sy-vline 
WA_SELEX_STR-XEIE1 sy-vline 
WA_SELEX_STR-XEIE2 sy-vline 
WA_SELEX_STR-XEIK1 sy-vline 
WA_SELEX_STR-XEIL1 sy-vline 
WA_SELEX_STR-XEIP1 sy-vline 
WA_SELEX_STR-XEIS1 sy-vline 
WA_SELEX_STR-XEIV1 sy-vline 
WA_SELEX_STR-XEIV2 sy-vline 
WA_SELEX_STR-XEIV3 sy-vline 
WA_SELEX_STR-XEIV4 sy-vline 
WA_SELEX_STR-XEIF1 sy-vline 
WA_SELEX_STR-XEIQ1 sy-vline 
WA_SELEX_STR-XEIG1 sy-vline 
WA_SELEX_STR-XEIC1 sy-vline 
WA_SELEX_STR-XEIVE sy-vline      INTO ld_text SEPARATED BY SPACE.

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