ABAP Select data from SAP table DIEAPL into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DIEAPL 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 DIEAPL. 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 DIEAPL 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_DIEAPL TYPE STANDARD TABLE OF DIEAPL,
      WA_DIEAPL TYPE DIEAPL,
      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: <DIEAPL> TYPE DIEAPL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DIEAPL
*  INTO TABLE @DATA(IT_DIEAPL2).
*--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_DIEAPL INDEX 1 INTO DATA(WA_DIEAPL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DIEAPL>-MANDT = 1.
<DIEAPL>-EQUNR = 1.
<DIEAPL>-PLNTY = 1.
<DIEAPL>-PLNNR = 1.
<DIEAPL>-PLNAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DIEAPL-ZKRIZ, sy-vline,
  WA_DIEAPL-ZAEHL, sy-vline,
  WA_DIEAPL-DATUV, sy-vline,
  WA_DIEAPL-TECHV, sy-vline,
  WA_DIEAPL-LOEKZ, sy-vline,
  WA_DIEAPL-PARKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DIEAPL 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_DIEAPL 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_DIEAPL INTO WA_DIEAPL.


*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 EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIEAPL-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIEAPL-EQUNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_DIEAPL-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIEAPL-TPLNR.
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_DIEAPL_STR, 
MANDT TYPE STRING,
EQUNR TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
ZKRIZ TYPE STRING,
ZAEHL TYPE STRING,
DATUV TYPE STRING,
TECHV TYPE STRING,
LOEKZ TYPE STRING,
PARKZ TYPE STRING,
AENNR TYPE STRING,
SWERK TYPE STRING,
IWERK TYPE STRING,
PLNVW TYPE STRING,
ANDAT TYPE STRING,
ANNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
EQKTX TYPE STRING,
TPLNR TYPE STRING,
PLTXT TYPE STRING,
STRNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DIEAPL_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_DIEAPL_STR-MANDT sy-vline 
WA_DIEAPL_STR-EQUNR sy-vline 
WA_DIEAPL_STR-PLNTY sy-vline 
WA_DIEAPL_STR-PLNNR sy-vline 
WA_DIEAPL_STR-PLNAL sy-vline 
WA_DIEAPL_STR-ZKRIZ sy-vline 
WA_DIEAPL_STR-ZAEHL sy-vline 
WA_DIEAPL_STR-DATUV sy-vline 
WA_DIEAPL_STR-TECHV sy-vline 
WA_DIEAPL_STR-LOEKZ sy-vline 
WA_DIEAPL_STR-PARKZ sy-vline 
WA_DIEAPL_STR-AENNR sy-vline 
WA_DIEAPL_STR-SWERK sy-vline 
WA_DIEAPL_STR-IWERK sy-vline 
WA_DIEAPL_STR-PLNVW sy-vline 
WA_DIEAPL_STR-ANDAT sy-vline 
WA_DIEAPL_STR-ANNAM sy-vline 
WA_DIEAPL_STR-AEDAT sy-vline 
WA_DIEAPL_STR-AENAM sy-vline 
WA_DIEAPL_STR-EQKTX sy-vline 
WA_DIEAPL_STR-TPLNR sy-vline 
WA_DIEAPL_STR-PLTXT sy-vline 
WA_DIEAPL_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.