ABAP Select data from SAP table E2GLSIF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E2GLSIF 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 E2GLSIF. 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 E2GLSIF 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_E2GLSIF TYPE STANDARD TABLE OF E2GLSIF,
      WA_E2GLSIF TYPE E2GLSIF,
      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: <E2GLSIF> TYPE E2GLSIF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E2GLSIF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E2GLSIF
  INTO TABLE IT_E2GLSIF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E2GLSIF
*  INTO TABLE @DATA(IT_E2GLSIF2).
*--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_E2GLSIF INDEX 1 INTO DATA(WA_E2GLSIF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E2GLSIF ASSIGNING <E2GLSIF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E2GLSIF>-DOCCT = 1.
<E2GLSIF>-DOCNR = 1.
<E2GLSIF>-DOCLN = 1.
<E2GLSIF>-CPUDT = 1.
<E2GLSIF>-CPUTM = 1.

ENDLOOP.

LOOP AT IT_E2GLSIF INTO WA_E2GLSIF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E2GLSIF-USNAM, sy-vline,
  WA_E2GLSIF-POPER, sy-vline,
  WA_E2GLSIF-SGTXT, sy-vline,
  WA_E2GLSIF-DOCTY, sy-vline,
  WA_E2GLSIF-ACTIV, sy-vline,
  WA_E2GLSIF-BUDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E2GLSIF 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_E2GLSIF 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_E2GLSIF INTO WA_E2GLSIF.


*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 ALPHA, internal->external for field DOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2GLSIF-DOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2GLSIF-DOCNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFDOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2GLSIF-REFDOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2GLSIF-REFDOCNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2GLSIF-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2GLSIF-LOGSYS.
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_E2GLSIF_STR, 
DOCCT TYPE STRING,
DOCNR TYPE STRING,
DOCLN TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
USNAM TYPE STRING,
POPER TYPE STRING,
SGTXT TYPE STRING,
DOCTY TYPE STRING,
ACTIV TYPE STRING,
BUDAT TYPE STRING,
WSDAT TYPE STRING,
REFDOCNR TYPE STRING,
REFRYEAR TYPE STRING,
REFDOCLN TYPE STRING,
REFDOCCT TYPE STRING,
REFACTIV TYPE STRING,
AWTYP TYPE STRING,
AWORG TYPE STRING,
LOGSYS TYPE STRING,
GLSIP TYPE STRING,
POST TYPE STRING,
V2POST TYPE STRING,
RPMAX TYPE STRING,
OFFSET TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E2GLSIF_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_E2GLSIF_STR-DOCCT sy-vline 
WA_E2GLSIF_STR-DOCNR sy-vline 
WA_E2GLSIF_STR-DOCLN sy-vline 
WA_E2GLSIF_STR-CPUDT sy-vline 
WA_E2GLSIF_STR-CPUTM sy-vline 
WA_E2GLSIF_STR-USNAM sy-vline 
WA_E2GLSIF_STR-POPER sy-vline 
WA_E2GLSIF_STR-SGTXT sy-vline 
WA_E2GLSIF_STR-DOCTY sy-vline 
WA_E2GLSIF_STR-ACTIV sy-vline 
WA_E2GLSIF_STR-BUDAT sy-vline 
WA_E2GLSIF_STR-WSDAT sy-vline 
WA_E2GLSIF_STR-REFDOCNR sy-vline 
WA_E2GLSIF_STR-REFRYEAR sy-vline 
WA_E2GLSIF_STR-REFDOCLN sy-vline 
WA_E2GLSIF_STR-REFDOCCT sy-vline 
WA_E2GLSIF_STR-REFACTIV sy-vline 
WA_E2GLSIF_STR-AWTYP sy-vline 
WA_E2GLSIF_STR-AWORG sy-vline 
WA_E2GLSIF_STR-LOGSYS sy-vline 
WA_E2GLSIF_STR-GLSIP sy-vline 
WA_E2GLSIF_STR-POST sy-vline 
WA_E2GLSIF_STR-V2POST sy-vline 
WA_E2GLSIF_STR-RPMAX sy-vline 
WA_E2GLSIF_STR-OFFSET sy-vline      INTO ld_text SEPARATED BY SPACE.

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