ABAP Select data from SAP table MEV_S_AD_ROOT_WORK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MEV_S_AD_ROOT_WORK
*  INTO TABLE @DATA(IT_MEV_S_AD_ROOT_WORK2).
*--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_MEV_S_AD_ROOT_WORK INDEX 1 INTO DATA(WA_MEV_S_AD_ROOT_WORK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MEV_S_AD_ROOT_WORK>-GUID_ROOT = 1.
<MEV_S_AD_ROOT_WORK>-DOCNR = 1.
<MEV_S_AD_ROOT_WORK>-GJAHR = 1.
<MEV_S_AD_ROOT_WORK>-DOCUMENT_CATEGORY = 1.
<MEV_S_AD_ROOT_WORK>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MEV_S_AD_ROOT_WORK-POPER, sy-vline,
  WA_MEV_S_AD_ROOT_WORK-APPLI, sy-vline,
  WA_MEV_S_AD_ROOT_WORK-ACCRUAL_AMOUNT, sy-vline,
  WA_MEV_S_AD_ROOT_WORK-WAERS, sy-vline,
  WA_MEV_S_AD_ROOT_WORK-BUDAT, sy-vline,
  WA_MEV_S_AD_ROOT_WORK-BUDAT_RESET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MEV_S_AD_ROOT_WORK 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_MEV_S_AD_ROOT_WORK 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_MEV_S_AD_ROOT_WORK INTO WA_MEV_S_AD_ROOT_WORK.


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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MEV_S_AD_ROOT_WORK-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEV_S_AD_ROOT_WORK-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field GJAHR_REV
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MEV_S_AD_ROOT_WORK-GJAHR_REV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEV_S_AD_ROOT_WORK-GJAHR_REV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTMP, internal->external for field APPROVAL_TIMESTAMP
CALL FUNCTION 'CONVERSION_EXIT_TSTMP_OUTPUT'
  EXPORTING
    input =                      WA_MEV_S_AD_ROOT_WORK-APPROVAL_TIMESTAMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEV_S_AD_ROOT_WORK-APPROVAL_TIMESTAMP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MEV_S_AD_ROOT_WORK-KURSF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEV_S_AD_ROOT_WORK-KURSF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTMP, internal->external for field CRTSP
CALL FUNCTION 'CONVERSION_EXIT_TSTMP_OUTPUT'
  EXPORTING
    input =                      WA_MEV_S_AD_ROOT_WORK-CRTSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEV_S_AD_ROOT_WORK-CRTSP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTMP, internal->external for field CHTSP
CALL FUNCTION 'CONVERSION_EXIT_TSTMP_OUTPUT'
  EXPORTING
    input =                      WA_MEV_S_AD_ROOT_WORK-CHTSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEV_S_AD_ROOT_WORK-CHTSP.
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_MEV_S_AD_ROOT_WORK_STR, 
GUID_ROOT TYPE STRING,
DOCNR TYPE STRING,
GJAHR TYPE STRING,
DOCUMENT_CATEGORY TYPE STRING,
BUKRS TYPE STRING,
POPER TYPE STRING,
APPLI TYPE STRING,
ACCRUAL_AMOUNT TYPE STRING,
WAERS TYPE STRING,
BUDAT TYPE STRING,
BUDAT_RESET TYPE STRING,
RELEASE_DATE TYPE STRING,
BKTXT TYPE STRING,
LOGSYS TYPE STRING,
REV_DOC_IND TYPE STRING,
DOCNR_REV TYPE STRING,
GJAHR_REV TYPE STRING,
APPROVER_NAME TYPE STRING,
APPROVAL_TIMESTAMP TYPE STRING,
HWAER TYPE STRING,
KURSF TYPE STRING,
APPR_REL_STATUS TYPE STRING,
APPROVAL_STATUS TYPE STRING,
POSTING_STATUS TYPE STRING,
LIFECYCLE_STATUS TYPE STRING,
ERNAM TYPE STRING,
CRTSP TYPE STRING,
AENAM TYPE STRING,
CHTSP TYPE STRING,
EXTERNAL_USER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MEV_S_AD_ROOT_WORK_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_MEV_S_AD_ROOT_WORK_STR-GUID_ROOT sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-DOCNR sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-GJAHR sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-DOCUMENT_CATEGORY sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-BUKRS sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-POPER sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-APPLI sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-ACCRUAL_AMOUNT sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-WAERS sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-BUDAT sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-BUDAT_RESET sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-RELEASE_DATE sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-BKTXT sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-LOGSYS sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-REV_DOC_IND sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-DOCNR_REV sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-GJAHR_REV sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-APPROVER_NAME sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-APPROVAL_TIMESTAMP sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-HWAER sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-KURSF sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-APPR_REL_STATUS sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-APPROVAL_STATUS sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-POSTING_STATUS sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-LIFECYCLE_STATUS sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-ERNAM sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-CRTSP sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-AENAM sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-CHTSP sy-vline 
WA_MEV_S_AD_ROOT_WORK_STR-EXTERNAL_USER sy-vline      INTO ld_text SEPARATED BY SPACE.

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