ABAP Select data from SAP table V_P01E2_MELD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_P01E2_MELD 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 V_P01E2_MELD. 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 V_P01E2_MELD 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_V_P01E2_MELD TYPE STANDARD TABLE OF V_P01E2_MELD,
      WA_V_P01E2_MELD TYPE V_P01E2_MELD,
      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: <V_P01E2_MELD> TYPE V_P01E2_MELD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_P01E2_MELD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_P01E2_MELD
  INTO TABLE IT_V_P01E2_MELD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_P01E2_MELD
*  INTO TABLE @DATA(IT_V_P01E2_MELD2).
*--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_V_P01E2_MELD INDEX 1 INTO DATA(WA_V_P01E2_MELD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_P01E2_MELD ASSIGNING <V_P01E2_MELD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_P01E2_MELD>-MANDT = 1.
<V_P01E2_MELD>-GUID = 1.
<V_P01E2_MELD>-SEQNO = 1.
<V_P01E2_MELD>-STATUS = 1.
<V_P01E2_MELD>-REPORT = 1.

ENDLOOP.

LOOP AT IT_V_P01E2_MELD INTO WA_V_P01E2_MELD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_P01E2_MELD-GDATE, sy-vline,
  WA_V_P01E2_MELD-GTIME, sy-vline,
  WA_V_P01E2_MELD-UNAME, sy-vline,
  WA_V_P01E2_MELD-PERNR, sy-vline,
  WA_V_P01E2_MELD-IDNR, sy-vline,
  WA_V_P01E2_MELD-GUID_CNECT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_P01E2_MELD 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_V_P01E2_MELD 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_V_P01E2_MELD INTO WA_V_P01E2_MELD.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_V_P01E2_MELD_STR, 
MANDT TYPE STRING,
GUID TYPE STRING,
SEQNO TYPE STRING,
STATUS TYPE STRING,
REPORT TYPE STRING,
GDATE TYPE STRING,
GTIME TYPE STRING,
UNAME TYPE STRING,
PERNR TYPE STRING,
IDNR TYPE STRING,
GUID_CNECT TYPE STRING,
MSGTY TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
CTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_P01E2_MELD_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_V_P01E2_MELD_STR-MANDT sy-vline 
WA_V_P01E2_MELD_STR-GUID sy-vline 
WA_V_P01E2_MELD_STR-SEQNO sy-vline 
WA_V_P01E2_MELD_STR-STATUS sy-vline 
WA_V_P01E2_MELD_STR-REPORT sy-vline 
WA_V_P01E2_MELD_STR-GDATE sy-vline 
WA_V_P01E2_MELD_STR-GTIME sy-vline 
WA_V_P01E2_MELD_STR-UNAME sy-vline 
WA_V_P01E2_MELD_STR-PERNR sy-vline 
WA_V_P01E2_MELD_STR-IDNR sy-vline 
WA_V_P01E2_MELD_STR-GUID_CNECT sy-vline 
WA_V_P01E2_MELD_STR-MSGTY sy-vline 
WA_V_P01E2_MELD_STR-MSGID sy-vline 
WA_V_P01E2_MELD_STR-MSGNO sy-vline 
WA_V_P01E2_MELD_STR-MSGV1 sy-vline 
WA_V_P01E2_MELD_STR-MSGV2 sy-vline 
WA_V_P01E2_MELD_STR-MSGV3 sy-vline 
WA_V_P01E2_MELD_STR-MSGV4 sy-vline 
WA_V_P01E2_MELD_STR-CTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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