ABAP Select data from SAP table P01A1_DXMM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P01A1_DXMM 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 P01A1_DXMM. 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 P01A1_DXMM 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_P01A1_DXMM TYPE STANDARD TABLE OF P01A1_DXMM,
      WA_P01A1_DXMM TYPE P01A1_DXMM,
      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: <P01A1_DXMM> TYPE P01A1_DXMM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P01A1_DXMM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P01A1_DXMM
  INTO TABLE IT_P01A1_DXMM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P01A1_DXMM
*  INTO TABLE @DATA(IT_P01A1_DXMM2).
*--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_P01A1_DXMM INDEX 1 INTO DATA(WA_P01A1_DXMM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P01A1_DXMM ASSIGNING <P01A1_DXMM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P01A1_DXMM>-MANDT = 1.
<P01A1_DXMM>-GUID = 1.
<P01A1_DXMM>-VERNR = 1.
<P01A1_DXMM>-BBNRAB = 1.
<P01A1_DXMM>-BBNREP = 1.

ENDLOOP.

LOOP AT IT_P01A1_DXMM INTO WA_P01A1_DXMM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P01A1_DXMM-ED, sy-vline,
  WA_P01A1_DXMM-DSID, sy-vline,
  WA_P01A1_DXMM-KENNZST, sy-vline,
  WA_P01A1_DXMM-DSID_URSPRUNG, sy-vline,
  WA_P01A1_DXMM-VORGID, sy-vline,
  WA_P01A1_DXMM-PRODID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P01A1_DXMM 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_P01A1_DXMM 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_P01A1_DXMM INTO WA_P01A1_DXMM.


*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_P01A1_DXMM_STR, 
MANDT TYPE STRING,
GUID TYPE STRING,
VERNR TYPE STRING,
BBNRAB TYPE STRING,
BBNREP TYPE STRING,
ED TYPE STRING,
DSID TYPE STRING,
KENNZST TYPE STRING,
DSID_URSPRUNG TYPE STRING,
VORGID TYPE STRING,
PRODID TYPE STRING,
MODID TYPE STRING,
AZVU TYPE STRING,
GESCHLECHT TYPE STRING,
VORNAME TYPE STRING,
FAMILIENNAME TYPE STRING,
VORSATZ TYPE STRING,
ZUSATZ TYPE STRING,
TITEL TYPE STRING,
VSNR TYPE STRING,
GEBNAME TYPE STRING,
GEBDATUM TYPE STRING,
GEBORT TYPE STRING,
GEBLAND TYPE STRING,
SASC TYPE STRING,
KV_ART TYPE STRING,
BBNR_EZS TYPE STRING,
NAME_EINZST TYPE STRING,
MITNR_BV TYPE STRING,
ENTS_BEGDA TYPE STRING,
ENTS_ENDDA TYPE STRING,
WEITERE_TAETIGKEIT TYPE STRING,
TAETIGKEIT_IN_DE TYPE STRING,
KZ_FESTE_EINSATZSTELLE_DE TYPE STRING,
KZ_ANGABEN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P01A1_DXMM_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_P01A1_DXMM_STR-MANDT sy-vline 
WA_P01A1_DXMM_STR-GUID sy-vline 
WA_P01A1_DXMM_STR-VERNR sy-vline 
WA_P01A1_DXMM_STR-BBNRAB sy-vline 
WA_P01A1_DXMM_STR-BBNREP sy-vline 
WA_P01A1_DXMM_STR-ED sy-vline 
WA_P01A1_DXMM_STR-DSID sy-vline 
WA_P01A1_DXMM_STR-KENNZST sy-vline 
WA_P01A1_DXMM_STR-DSID_URSPRUNG sy-vline 
WA_P01A1_DXMM_STR-VORGID sy-vline 
WA_P01A1_DXMM_STR-PRODID sy-vline 
WA_P01A1_DXMM_STR-MODID sy-vline 
WA_P01A1_DXMM_STR-AZVU sy-vline 
WA_P01A1_DXMM_STR-GESCHLECHT sy-vline 
WA_P01A1_DXMM_STR-VORNAME sy-vline 
WA_P01A1_DXMM_STR-FAMILIENNAME sy-vline 
WA_P01A1_DXMM_STR-VORSATZ sy-vline 
WA_P01A1_DXMM_STR-ZUSATZ sy-vline 
WA_P01A1_DXMM_STR-TITEL sy-vline 
WA_P01A1_DXMM_STR-VSNR sy-vline 
WA_P01A1_DXMM_STR-GEBNAME sy-vline 
WA_P01A1_DXMM_STR-GEBDATUM sy-vline 
WA_P01A1_DXMM_STR-GEBORT sy-vline 
WA_P01A1_DXMM_STR-GEBLAND sy-vline 
WA_P01A1_DXMM_STR-SASC sy-vline 
WA_P01A1_DXMM_STR-KV_ART sy-vline 
WA_P01A1_DXMM_STR-BBNR_EZS sy-vline 
WA_P01A1_DXMM_STR-NAME_EINZST sy-vline 
WA_P01A1_DXMM_STR-MITNR_BV sy-vline 
WA_P01A1_DXMM_STR-ENTS_BEGDA sy-vline 
WA_P01A1_DXMM_STR-ENTS_ENDDA sy-vline 
WA_P01A1_DXMM_STR-WEITERE_TAETIGKEIT sy-vline 
WA_P01A1_DXMM_STR-TAETIGKEIT_IN_DE sy-vline 
WA_P01A1_DXMM_STR-KZ_FESTE_EINSATZSTELLE_DE sy-vline 
WA_P01A1_DXMM_STR-KZ_ANGABEN sy-vline      INTO ld_text SEPARATED BY SPACE.

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