ABAP Select data from SAP table ESUC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESUC
*  INTO TABLE @DATA(IT_ESUC2).
*--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_ESUC INDEX 1 INTO DATA(WA_ESUC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESUC>-MANDT = 1.
<ESUC>-PACKNO = 1.
<ESUC>-INTROW = 1.
<ESUC>-DEL = 1.
<ESUC>-EBELN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESUC-EBELP, sy-vline,
  WA_ESUC-LIMIT, sy-vline,
  WA_ESUC-NOLIMIT, sy-vline,
  WA_ESUC-ACTVALUE, sy-vline,
  WA_ESUC-KTEXT1, sy-vline,
  WA_ESUC-SUB_PACKNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESUC 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_ESUC 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_ESUC INTO WA_ESUC.


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

*Conversion exit ALPHA, internal->external for field SRM_CONTRACT_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESUC-SRM_CONTRACT_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESUC-SRM_CONTRACT_ID.
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_ESUC_STR, 
MANDT TYPE STRING,
PACKNO TYPE STRING,
INTROW TYPE STRING,
DEL TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
LIMIT TYPE STRING,
NOLIMIT TYPE STRING,
ACTVALUE TYPE STRING,
KTEXT1 TYPE STRING,
SUB_PACKNO TYPE STRING,
PRS_CHG TYPE STRING,
SRM_CONTRACT_ID TYPE STRING,
SRM_CONTRACT_ITM TYPE STRING,
_DATAAGING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESUC_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_ESUC_STR-MANDT sy-vline 
WA_ESUC_STR-PACKNO sy-vline 
WA_ESUC_STR-INTROW sy-vline 
WA_ESUC_STR-DEL sy-vline 
WA_ESUC_STR-EBELN sy-vline 
WA_ESUC_STR-EBELP sy-vline 
WA_ESUC_STR-LIMIT sy-vline 
WA_ESUC_STR-NOLIMIT sy-vline 
WA_ESUC_STR-ACTVALUE sy-vline 
WA_ESUC_STR-KTEXT1 sy-vline 
WA_ESUC_STR-SUB_PACKNO sy-vline 
WA_ESUC_STR-PRS_CHG sy-vline 
WA_ESUC_STR-SRM_CONTRACT_ID sy-vline 
WA_ESUC_STR-SRM_CONTRACT_ITM sy-vline 
WA_ESUC_STR-_DATAAGING sy-vline      INTO ld_text SEPARATED BY SPACE.

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