ABAP Select data from SAP table E1CAWNM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1CAWNM 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 E1CAWNM. 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 E1CAWNM 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_E1CAWNM TYPE STANDARD TABLE OF E1CAWNM,
      WA_E1CAWNM TYPE E1CAWNM,
      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: <E1CAWNM> TYPE E1CAWNM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1CAWNM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1CAWNM
  INTO TABLE IT_E1CAWNM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1CAWNM
*  INTO TABLE @DATA(IT_E1CAWNM2).
*--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_E1CAWNM INDEX 1 INTO DATA(WA_E1CAWNM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1CAWNM ASSIGNING <E1CAWNM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1CAWNM>-MSGFN = 1.
<E1CAWNM>-ATNAM = 1.
<E1CAWNM>-ATZHL = 1.
<E1CAWNM>-ATWRT = 1.
<E1CAWNM>-ATFLV = 1.

ENDLOOP.

LOOP AT IT_E1CAWNM INTO WA_E1CAWNM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1CAWNM-ATFLB, sy-vline,
  WA_E1CAWNM-ATCOD, sy-vline,
  WA_E1CAWNM-ATSTD, sy-vline,
  WA_E1CAWNM-ATAWE, sy-vline,
  WA_E1CAWNM-ATAW1, sy-vline,
  WA_E1CAWNM-ATIDN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1CAWNM 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_E1CAWNM 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_E1CAWNM INTO WA_E1CAWNM.


*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 CUNIT, internal->external for field ATAWE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_E1CAWNM-ATAWE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E1CAWNM-ATAWE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ATAW1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_E1CAWNM-ATAW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E1CAWNM-ATAW1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E1CAWNM-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E1CAWNM-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E1CAWNM-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E1CAWNM-AENNR.
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_E1CAWNM_STR, 
MSGFN TYPE STRING,
ATNAM TYPE STRING,
ATZHL TYPE STRING,
ATWRT TYPE STRING,
ATFLV TYPE STRING,
ATFLB TYPE STRING,
ATCOD TYPE STRING,
ATSTD TYPE STRING,
ATAWE TYPE STRING,
ATAW1 TYPE STRING,
ATIDN TYPE STRING,
DOKNR TYPE STRING,
DOKAR TYPE STRING,
DOKTL TYPE STRING,
DOKVR TYPE STRING,
SPRAS TYPE STRING,
TXTNR TYPE STRING,
DATUV TYPE STRING,
AENNR TYPE STRING,
LKENZ TYPE STRING,
ATZHH TYPE STRING,
ATWHI TYPE STRING,
ATTLV TYPE STRING,
ATTLB TYPE STRING,
ATPRZ TYPE STRING,
ATINC TYPE STRING,
SPRAS_ISO TYPE STRING,
VALUE_HIGH TYPE STRING,
ATWRT_LONG TYPE STRING,
VALUE_HIGH_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1CAWNM_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_E1CAWNM_STR-MSGFN sy-vline 
WA_E1CAWNM_STR-ATNAM sy-vline 
WA_E1CAWNM_STR-ATZHL sy-vline 
WA_E1CAWNM_STR-ATWRT sy-vline 
WA_E1CAWNM_STR-ATFLV sy-vline 
WA_E1CAWNM_STR-ATFLB sy-vline 
WA_E1CAWNM_STR-ATCOD sy-vline 
WA_E1CAWNM_STR-ATSTD sy-vline 
WA_E1CAWNM_STR-ATAWE sy-vline 
WA_E1CAWNM_STR-ATAW1 sy-vline 
WA_E1CAWNM_STR-ATIDN sy-vline 
WA_E1CAWNM_STR-DOKNR sy-vline 
WA_E1CAWNM_STR-DOKAR sy-vline 
WA_E1CAWNM_STR-DOKTL sy-vline 
WA_E1CAWNM_STR-DOKVR sy-vline 
WA_E1CAWNM_STR-SPRAS sy-vline 
WA_E1CAWNM_STR-TXTNR sy-vline 
WA_E1CAWNM_STR-DATUV sy-vline 
WA_E1CAWNM_STR-AENNR sy-vline 
WA_E1CAWNM_STR-LKENZ sy-vline 
WA_E1CAWNM_STR-ATZHH sy-vline 
WA_E1CAWNM_STR-ATWHI sy-vline 
WA_E1CAWNM_STR-ATTLV sy-vline 
WA_E1CAWNM_STR-ATTLB sy-vline 
WA_E1CAWNM_STR-ATPRZ sy-vline 
WA_E1CAWNM_STR-ATINC sy-vline 
WA_E1CAWNM_STR-SPRAS_ISO sy-vline 
WA_E1CAWNM_STR-VALUE_HIGH sy-vline 
WA_E1CAWNM_STR-ATWRT_LONG sy-vline 
WA_E1CAWNM_STR-VALUE_HIGH_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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