ABAP Select data from SAP table EWAALYCCON into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWAALYCCON
*  INTO TABLE @DATA(IT_EWAALYCCON2).
*--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_EWAALYCCON INDEX 1 INTO DATA(WA_EWAALYCCON2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWAALYCCON>-MANDT = 1.
<EWAALYCCON>-SALESDOCUMENT = 1.
<EWAALYCCON>-CREATIONDATE = 1.
<EWAALYCCON>-TIME = 1.
<EWAALYCCON>-VALIDFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWAALYCCON-VALIDTO, sy-vline,
  WA_EWAALYCCON-DOCUEMNTDATE, sy-vline,
  WA_EWAALYCCON-DOCUMENTTYPE, sy-vline,
  WA_EWAALYCCON-NETVALUE, sy-vline,
  WA_EWAALYCCON-CURRENCY, sy-vline,
  WA_EWAALYCCON-DESCRIPTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWAALYCCON 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_EWAALYCCON 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_EWAALYCCON INTO WA_EWAALYCCON.


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

*Conversion exit ALPHA, internal->external for field PARTNERNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAALYCCON-PARTNERNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAALYCCON-PARTNERNUMBER.
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_EWAALYCCON_STR, 
MANDT TYPE STRING,
SALESDOCUMENT TYPE STRING,
CREATIONDATE TYPE STRING,
TIME TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
DOCUEMNTDATE TYPE STRING,
DOCUMENTTYPE TYPE STRING,
NETVALUE TYPE STRING,
CURRENCY TYPE STRING,
DESCRIPTION TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CONTRACTCOUNT TYPE STRING,
PARTNERNUMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWAALYCCON_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_EWAALYCCON_STR-MANDT sy-vline 
WA_EWAALYCCON_STR-SALESDOCUMENT sy-vline 
WA_EWAALYCCON_STR-CREATIONDATE sy-vline 
WA_EWAALYCCON_STR-TIME sy-vline 
WA_EWAALYCCON_STR-VALIDFROM sy-vline 
WA_EWAALYCCON_STR-VALIDTO sy-vline 
WA_EWAALYCCON_STR-DOCUEMNTDATE sy-vline 
WA_EWAALYCCON_STR-DOCUMENTTYPE sy-vline 
WA_EWAALYCCON_STR-NETVALUE sy-vline 
WA_EWAALYCCON_STR-CURRENCY sy-vline 
WA_EWAALYCCON_STR-DESCRIPTION sy-vline 
WA_EWAALYCCON_STR-BUSINESSPARTNER sy-vline 
WA_EWAALYCCON_STR-CONTRACTCOUNT sy-vline 
WA_EWAALYCCON_STR-PARTNERNUMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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