ABAP Select data from SAP table EGPL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EGPL
*  INTO TABLE @DATA(IT_EGPL2).
*--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_EGPL INDEX 1 INTO DATA(WA_EGPL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EGPL>-MANDT = 1.
<EGPL>-DEVLOC = 1.
<EGPL>-SPRAS = 1.
<EGPL>-PLTXT = 1.
<EGPL>-KZLTX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EGPL-TPLKZ, sy-vline,
  WA_EGPL-FLTYP, sy-vline,
  WA_EGPL-HAUS, sy-vline,
  WA_EGPL-DATAB, sy-vline,
  WA_EGPL-BEGRU, sy-vline,
  WA_EGPL-EINZLI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EGPL 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_EGPL 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_EGPL INTO WA_EGPL.


*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 TPLNR, internal->external for field DEVLOC
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_EGPL-DEVLOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EGPL-DEVLOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_EGPL-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EGPL-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field HAUS
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_EGPL-HAUS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EGPL-HAUS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field ADRNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EGPL-ADRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EGPL-ADRNR.
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_EGPL_STR, 
MANDT TYPE STRING,
DEVLOC TYPE STRING,
SPRAS TYPE STRING,
PLTXT TYPE STRING,
KZLTX TYPE STRING,
TPLKZ TYPE STRING,
FLTYP TYPE STRING,
HAUS TYPE STRING,
DATAB TYPE STRING,
BEGRU TYPE STRING,
EINZLI TYPE STRING,
IWERK TYPE STRING,
IWERKI TYPE STRING,
POSNR TYPE STRING,
ISTYP TYPE STRING,
VSTELLE TYPE STRING,
SWERK TYPE STRING,
SWERKI TYPE STRING,
BUKRS TYPE STRING,
BUKRSI TYPE STRING,
ADRNR TYPE STRING,
ADRNRI TYPE STRING,
STORT TYPE STRING,
STORTI TYPE STRING,
STORTZUS TYPE STRING,
ILOAN TYPE STRING,
OBJNR TYPE STRING,
IEQUI TYPE STRING,
IEQUII TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
STRNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EGPL_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_EGPL_STR-MANDT sy-vline 
WA_EGPL_STR-DEVLOC sy-vline 
WA_EGPL_STR-SPRAS sy-vline 
WA_EGPL_STR-PLTXT sy-vline 
WA_EGPL_STR-KZLTX sy-vline 
WA_EGPL_STR-TPLKZ sy-vline 
WA_EGPL_STR-FLTYP sy-vline 
WA_EGPL_STR-HAUS sy-vline 
WA_EGPL_STR-DATAB sy-vline 
WA_EGPL_STR-BEGRU sy-vline 
WA_EGPL_STR-EINZLI sy-vline 
WA_EGPL_STR-IWERK sy-vline 
WA_EGPL_STR-IWERKI sy-vline 
WA_EGPL_STR-POSNR sy-vline 
WA_EGPL_STR-ISTYP sy-vline 
WA_EGPL_STR-VSTELLE sy-vline 
WA_EGPL_STR-SWERK sy-vline 
WA_EGPL_STR-SWERKI sy-vline 
WA_EGPL_STR-BUKRS sy-vline 
WA_EGPL_STR-BUKRSI sy-vline 
WA_EGPL_STR-ADRNR sy-vline 
WA_EGPL_STR-ADRNRI sy-vline 
WA_EGPL_STR-STORT sy-vline 
WA_EGPL_STR-STORTI sy-vline 
WA_EGPL_STR-STORTZUS sy-vline 
WA_EGPL_STR-ILOAN sy-vline 
WA_EGPL_STR-OBJNR sy-vline 
WA_EGPL_STR-IEQUI sy-vline 
WA_EGPL_STR-IEQUII sy-vline 
WA_EGPL_STR-ERDAT sy-vline 
WA_EGPL_STR-ERNAM sy-vline 
WA_EGPL_STR-AEDAT sy-vline 
WA_EGPL_STR-AENAM sy-vline 
WA_EGPL_STR-STRNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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