ABAP Select data from SAP table E1CMDES into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1CMDES 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 E1CMDES. 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 E1CMDES 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_E1CMDES TYPE STANDARD TABLE OF E1CMDES,
      WA_E1CMDES TYPE E1CMDES,
      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: <E1CMDES> TYPE E1CMDES.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1CMDES.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1CMDES
  INTO TABLE IT_E1CMDES.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1CMDES
*  INTO TABLE @DATA(IT_E1CMDES2).
*--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_E1CMDES INDEX 1 INTO DATA(WA_E1CMDES2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1CMDES ASSIGNING <E1CMDES>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1CMDES>-ALEDATE = 1.
<E1CMDES>-ALETIME = 1.
<E1CMDES>-ARCHK = 1.
<E1CMDES>-BUKRS = 1.
<E1CMDES>-BNKKO = 1.

ENDLOOP.

LOOP AT IT_E1CMDES INTO WA_E1CMDES.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1CMDES-GRUPP, sy-vline,
  WA_E1CMDES-EBENE, sy-vline,
  WA_E1CMDES-DISPW, sy-vline,
  WA_E1CMDES-DATUM, sy-vline,
  WA_E1CMDES-IDENR, sy-vline,
  WA_E1CMDES-GSBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1CMDES 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_E1CMDES 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_E1CMDES INTO WA_E1CMDES.


*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_E1CMDES_STR, 
ALEDATE TYPE STRING,
ALETIME TYPE STRING,
ARCHK TYPE STRING,
BUKRS TYPE STRING,
BNKKO TYPE STRING,
GRUPP TYPE STRING,
EBENE TYPE STRING,
DISPW TYPE STRING,
DATUM TYPE STRING,
IDENR TYPE STRING,
GSBER TYPE STRING,
DMSHB TYPE STRING,
WRSHB TYPE STRING,
DSART TYPE STRING,
USRID TYPE STRING,
HZDAT TYPE STRING,
AENUS TYPE STRING,
AENDT TYPE STRING,
AVDAT TYPE STRING,
MERKM TYPE STRING,
ZUONR TYPE STRING,
REFER TYPE STRING,
SGTXT TYPE STRING,
GGRUP TYPE STRING,
GBUKR TYPE STRING,
GVALT TYPE STRING,
AUSNR TYPE STRING,
AUSTG TYPE STRING,
VOART TYPE STRING,
ZINSS TYPE STRING,
KLART TYPE STRING,
STKNZ TYPE STRING,
SDATM TYPE STRING,
HWAER TYPE STRING,
SEGMENT TYPE STRING,
PRCTR TYPE STRING,
GEBER TYPE STRING,
GRANT_NBR TYPE STRING,
RESERVE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1CMDES_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_E1CMDES_STR-ALEDATE sy-vline 
WA_E1CMDES_STR-ALETIME sy-vline 
WA_E1CMDES_STR-ARCHK sy-vline 
WA_E1CMDES_STR-BUKRS sy-vline 
WA_E1CMDES_STR-BNKKO sy-vline 
WA_E1CMDES_STR-GRUPP sy-vline 
WA_E1CMDES_STR-EBENE sy-vline 
WA_E1CMDES_STR-DISPW sy-vline 
WA_E1CMDES_STR-DATUM sy-vline 
WA_E1CMDES_STR-IDENR sy-vline 
WA_E1CMDES_STR-GSBER sy-vline 
WA_E1CMDES_STR-DMSHB sy-vline 
WA_E1CMDES_STR-WRSHB sy-vline 
WA_E1CMDES_STR-DSART sy-vline 
WA_E1CMDES_STR-USRID sy-vline 
WA_E1CMDES_STR-HZDAT sy-vline 
WA_E1CMDES_STR-AENUS sy-vline 
WA_E1CMDES_STR-AENDT sy-vline 
WA_E1CMDES_STR-AVDAT sy-vline 
WA_E1CMDES_STR-MERKM sy-vline 
WA_E1CMDES_STR-ZUONR sy-vline 
WA_E1CMDES_STR-REFER sy-vline 
WA_E1CMDES_STR-SGTXT sy-vline 
WA_E1CMDES_STR-GGRUP sy-vline 
WA_E1CMDES_STR-GBUKR sy-vline 
WA_E1CMDES_STR-GVALT sy-vline 
WA_E1CMDES_STR-AUSNR sy-vline 
WA_E1CMDES_STR-AUSTG sy-vline 
WA_E1CMDES_STR-VOART sy-vline 
WA_E1CMDES_STR-ZINSS sy-vline 
WA_E1CMDES_STR-KLART sy-vline 
WA_E1CMDES_STR-STKNZ sy-vline 
WA_E1CMDES_STR-SDATM sy-vline 
WA_E1CMDES_STR-HWAER sy-vline 
WA_E1CMDES_STR-SEGMENT sy-vline 
WA_E1CMDES_STR-PRCTR sy-vline 
WA_E1CMDES_STR-GEBER sy-vline 
WA_E1CMDES_STR-GRANT_NBR sy-vline 
WA_E1CMDES_STR-RESERVE sy-vline      INTO ld_text SEPARATED BY SPACE.

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