ABAP Select data from SAP table ESV_COMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESV_COMP
*  INTO TABLE @DATA(IT_ESV_COMP2).
*--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_ESV_COMP INDEX 1 INTO DATA(WA_ESV_COMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESV_COMP>-MANDTVP = 1.
<ESV_COMP>-RECNVP = 1.
<ESV_COMP>-ACTNVP = 1.
<ESV_COMP>-VALFRVP = 1.
<ESV_COMP>-VALTOVP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESV_COMP-AENNRVP, sy-vline,
  WA_ESV_COMP-DELFLGVP, sy-vline,
  WA_ESV_COMP-RECNTVA, sy-vline,
  WA_ESV_COMP-COMPCAT, sy-vline,
  WA_ESV_COMP-RECNCMP, sy-vline,
  WA_ESV_COMP-PRECL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESV_COMP 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_ESV_COMP 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_ESV_COMP INTO WA_ESV_COMP.


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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field RECNTVH
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESV_COMP-RECNTVH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESV_COMP-RECNTVH.
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_ESV_COMP_STR, 
MANDTVP TYPE STRING,
RECNVP TYPE STRING,
ACTNVP TYPE STRING,
VALFRVP TYPE STRING,
VALTOVP TYPE STRING,
AENNRVP TYPE STRING,
DELFLGVP TYPE STRING,
RECNTVA TYPE STRING,
COMPCAT TYPE STRING,
RECNCMP TYPE STRING,
PRECL TYPE STRING,
COMPLOW TYPE STRING,
PRECU TYPE STRING,
COMPUPP TYPE STRING,
COMPAVG TYPE STRING,
COMPEXP TYPE STRING,
COMPEXCVAL TYPE STRING,
MANDT TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
AENNR TYPE STRING,
DELFLG TYPE STRING,
RECNROOT TYPE STRING,
ESTCAT TYPE STRING,
MANDTVA TYPE STRING,
RECNVA TYPE STRING,
ACTNVA TYPE STRING,
VALFRVA TYPE STRING,
VALTOVA TYPE STRING,
AENNRVA TYPE STRING,
DELFLGVA TYPE STRING,
RECNTVH TYPE STRING,
ORD TYPE STRING,
COMPREL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESV_COMP_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_ESV_COMP_STR-MANDTVP sy-vline 
WA_ESV_COMP_STR-RECNVP sy-vline 
WA_ESV_COMP_STR-ACTNVP sy-vline 
WA_ESV_COMP_STR-VALFRVP sy-vline 
WA_ESV_COMP_STR-VALTOVP sy-vline 
WA_ESV_COMP_STR-AENNRVP sy-vline 
WA_ESV_COMP_STR-DELFLGVP sy-vline 
WA_ESV_COMP_STR-RECNTVA sy-vline 
WA_ESV_COMP_STR-COMPCAT sy-vline 
WA_ESV_COMP_STR-RECNCMP sy-vline 
WA_ESV_COMP_STR-PRECL sy-vline 
WA_ESV_COMP_STR-COMPLOW sy-vline 
WA_ESV_COMP_STR-PRECU sy-vline 
WA_ESV_COMP_STR-COMPUPP sy-vline 
WA_ESV_COMP_STR-COMPAVG sy-vline 
WA_ESV_COMP_STR-COMPEXP sy-vline 
WA_ESV_COMP_STR-COMPEXCVAL sy-vline 
WA_ESV_COMP_STR-MANDT sy-vline 
WA_ESV_COMP_STR-RECN sy-vline 
WA_ESV_COMP_STR-ACTN sy-vline 
WA_ESV_COMP_STR-VALFR sy-vline 
WA_ESV_COMP_STR-VALTO sy-vline 
WA_ESV_COMP_STR-AENNR sy-vline 
WA_ESV_COMP_STR-DELFLG sy-vline 
WA_ESV_COMP_STR-RECNROOT sy-vline 
WA_ESV_COMP_STR-ESTCAT sy-vline 
WA_ESV_COMP_STR-MANDTVA sy-vline 
WA_ESV_COMP_STR-RECNVA sy-vline 
WA_ESV_COMP_STR-ACTNVA sy-vline 
WA_ESV_COMP_STR-VALFRVA sy-vline 
WA_ESV_COMP_STR-VALTOVA sy-vline 
WA_ESV_COMP_STR-AENNRVA sy-vline 
WA_ESV_COMP_STR-DELFLGVA sy-vline 
WA_ESV_COMP_STR-RECNTVH sy-vline 
WA_ESV_COMP_STR-ORD sy-vline 
WA_ESV_COMP_STR-COMPREL sy-vline      INTO ld_text SEPARATED BY SPACE.

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