ABAP Select data from SAP table CRMST_ERP_ACTUAL_DOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMST_ERP_ACTUAL_DOC
*  INTO TABLE @DATA(IT_CRMST_ERP_ACTUAL_DOC2).
*--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_CRMST_ERP_ACTUAL_DOC INDEX 1 INTO DATA(WA_CRMST_ERP_ACTUAL_DOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMST_ERP_ACTUAL_DOC>-GUID = 1.
<CRMST_ERP_ACTUAL_DOC>-PROCESSMODE = 1.
<CRMST_ERP_ACTUAL_DOC>-VBELN = 1.
<CRMST_ERP_ACTUAL_DOC>-ERROR = 1.
<CRMST_ERP_ACTUAL_DOC>-PRED_GUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMST_ERP_ACTUAL_DOC-AUART, sy-vline,
  WA_CRMST_ERP_ACTUAL_DOC-TRVOG, sy-vline,
  WA_CRMST_ERP_ACTUAL_DOC-ORG_DET_FINISHED, sy-vline,
  WA_CRMST_ERP_ACTUAL_DOC-OBJECT, sy-vline,
  WA_CRMST_ERP_ACTUAL_DOC-HANDLE_ITEM, sy-vline,
  WA_CRMST_ERP_ACTUAL_DOC-HANDLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRMST_ERP_ACTUAL_DOC 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_CRMST_ERP_ACTUAL_DOC 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_CRMST_ERP_ACTUAL_DOC INTO WA_CRMST_ERP_ACTUAL_DOC.


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

*Conversion exit AUART, internal->external for field AUART
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_CRMST_ERP_ACTUAL_DOC-AUART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMST_ERP_ACTUAL_DOC-AUART.
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_CRMST_ERP_ACTUAL_DOC_STR, 
GUID TYPE STRING,
PROCESSMODE TYPE STRING,
VBELN TYPE STRING,
ERROR TYPE STRING,
PRED_GUID TYPE STRING,
AUART TYPE STRING,
TRVOG TYPE STRING,
ORG_DET_FINISHED TYPE STRING,
OBJECT TYPE STRING,
HANDLE_ITEM TYPE STRING,
HANDLE TYPE STRING,
POSNR TYPE STRING,
ETENR TYPE STRING,
PARVW TYPE STRING,
ERRKZ TYPE STRING,
MODNO TYPE STRING,
ERROR_MSGID TYPE STRING,
ERROR_MSGNO TYPE STRING,
ERROR_MSGV1 TYPE STRING,
ERROR_MSGV2 TYPE STRING,
ERROR_MSGV3 TYPE STRING,
ERROR_MSGV4 TYPE STRING,
ERROR_TEXT TYPE STRING,
ERROR_CODE TYPE STRING,
ON_DB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMST_ERP_ACTUAL_DOC_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_CRMST_ERP_ACTUAL_DOC_STR-GUID sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-PROCESSMODE sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-VBELN sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-ERROR sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-PRED_GUID sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-AUART sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-TRVOG sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-ORG_DET_FINISHED sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-OBJECT sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-HANDLE_ITEM sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-HANDLE sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-POSNR sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-ETENR sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-PARVW sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-ERRKZ sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-MODNO sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-ERROR_MSGID sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-ERROR_MSGNO sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-ERROR_MSGV1 sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-ERROR_MSGV2 sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-ERROR_MSGV3 sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-ERROR_MSGV4 sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-ERROR_TEXT sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-ERROR_CODE sy-vline 
WA_CRMST_ERP_ACTUAL_DOC_STR-ON_DB sy-vline      INTO ld_text SEPARATED BY SPACE.

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