ABAP Select data from SAP table P01T_LST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P01T_LST 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 P01T_LST. 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 P01T_LST 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_P01T_LST TYPE STANDARD TABLE OF P01T_LST,
      WA_P01T_LST TYPE P01T_LST,
      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: <P01T_LST> TYPE P01T_LST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P01T_LST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P01T_LST
  INTO TABLE IT_P01T_LST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P01T_LST
*  INTO TABLE @DATA(IT_P01T_LST2).
*--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_P01T_LST INDEX 1 INTO DATA(WA_P01T_LST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P01T_LST ASSIGNING <P01T_LST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P01T_LST>-MANDT = 1.
<P01T_LST>-PERNR = 1.
<P01T_LST>-LBART = 1.
<P01T_LST>-ENDDA = 1.
<P01T_LST>-LFDNR = 1.

ENDLOOP.

LOOP AT IT_P01T_LST INTO WA_P01T_LST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P01T_LST-LSART, sy-vline,
  WA_P01T_LST-VERSN, sy-vline,
  WA_P01T_LST-BJAHR, sy-vline,
  WA_P01T_LST-BANFA, sy-vline,
  WA_P01T_LST-BENDE, sy-vline,
  WA_P01T_LST-KETIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P01T_LST 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_P01T_LST 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_P01T_LST INTO WA_P01T_LST.


*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_P01T_LST_STR, 
MANDT TYPE STRING,
PERNR TYPE STRING,
LBART TYPE STRING,
ENDDA TYPE STRING,
LFDNR TYPE STRING,
LSART TYPE STRING,
VERSN TYPE STRING,
BJAHR TYPE STRING,
BANFA TYPE STRING,
BENDE TYPE STRING,
KETIN TYPE STRING,
OMMAG TYPE STRING,
GMDNR TYPE STRING,
GMDTX TYPE STRING,
GESCH TYPE STRING,
NACHN TYPE STRING,
VORNA TYPE STRING,
VORSA TYPE STRING,
NAMZU TYPE STRING,
TITEL TYPE STRING,
NAME2 TYPE STRING,
VORS2 TYPE STRING,
NAMZ2 TYPE STRING,
GBDAT TYPE STRING,
STRAS TYPE STRING,
HAUSN TYPE STRING,
HAUSZ TYPE STRING,
ANSZU TYPE STRING,
PSTLZ TYPE STRING,
ORT01 TYPE STRING,
STRKL TYPE STRING,
KDFBT TYPE STRING,
FRBJ1 TYPE STRING,
HINZJ TYPE STRING,
ANZLU TYPE STRING,
STTAB TYPE STRING,
AGNAM TYPE STRING,
AGSNR TYPE STRING,
AGSTR TYPE STRING,
AGHNR TYPE STRING,
AGHNZ TYPE STRING,
AGANZ TYPE STRING,
AGPLZ TYPE STRING,
AGORT TYPE STRING,
FZAMT TYPE STRING,
FZTXT TYPE STRING,
AGFZA TYPE STRING,
AGFZT TYPE STRING,
GRSBS TYPE STRING,
LANDD TYPE STRING,
ALPLZ TYPE STRING,
AGPBX TYPE STRING,
GKPLZ TYPE STRING,
BEGVB TYPE STRING,
VBEZB TYPE STRING,
STRKZ TYPE STRING,
SIDNR TYPE STRING,
BNAME TYPE STRING,
ABNAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P01T_LST_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_P01T_LST_STR-MANDT sy-vline 
WA_P01T_LST_STR-PERNR sy-vline 
WA_P01T_LST_STR-LBART sy-vline 
WA_P01T_LST_STR-ENDDA sy-vline 
WA_P01T_LST_STR-LFDNR sy-vline 
WA_P01T_LST_STR-LSART sy-vline 
WA_P01T_LST_STR-VERSN sy-vline 
WA_P01T_LST_STR-BJAHR sy-vline 
WA_P01T_LST_STR-BANFA sy-vline 
WA_P01T_LST_STR-BENDE sy-vline 
WA_P01T_LST_STR-KETIN sy-vline 
WA_P01T_LST_STR-OMMAG sy-vline 
WA_P01T_LST_STR-GMDNR sy-vline 
WA_P01T_LST_STR-GMDTX sy-vline 
WA_P01T_LST_STR-GESCH sy-vline 
WA_P01T_LST_STR-NACHN sy-vline 
WA_P01T_LST_STR-VORNA sy-vline 
WA_P01T_LST_STR-VORSA sy-vline 
WA_P01T_LST_STR-NAMZU sy-vline 
WA_P01T_LST_STR-TITEL sy-vline 
WA_P01T_LST_STR-NAME2 sy-vline 
WA_P01T_LST_STR-VORS2 sy-vline 
WA_P01T_LST_STR-NAMZ2 sy-vline 
WA_P01T_LST_STR-GBDAT sy-vline 
WA_P01T_LST_STR-STRAS sy-vline 
WA_P01T_LST_STR-HAUSN sy-vline 
WA_P01T_LST_STR-HAUSZ sy-vline 
WA_P01T_LST_STR-ANSZU sy-vline 
WA_P01T_LST_STR-PSTLZ sy-vline 
WA_P01T_LST_STR-ORT01 sy-vline 
WA_P01T_LST_STR-STRKL sy-vline 
WA_P01T_LST_STR-KDFBT sy-vline 
WA_P01T_LST_STR-FRBJ1 sy-vline 
WA_P01T_LST_STR-HINZJ sy-vline 
WA_P01T_LST_STR-ANZLU sy-vline 
WA_P01T_LST_STR-STTAB sy-vline 
WA_P01T_LST_STR-AGNAM sy-vline 
WA_P01T_LST_STR-AGSNR sy-vline 
WA_P01T_LST_STR-AGSTR sy-vline 
WA_P01T_LST_STR-AGHNR sy-vline 
WA_P01T_LST_STR-AGHNZ sy-vline 
WA_P01T_LST_STR-AGANZ sy-vline 
WA_P01T_LST_STR-AGPLZ sy-vline 
WA_P01T_LST_STR-AGORT sy-vline 
WA_P01T_LST_STR-FZAMT sy-vline 
WA_P01T_LST_STR-FZTXT sy-vline 
WA_P01T_LST_STR-AGFZA sy-vline 
WA_P01T_LST_STR-AGFZT sy-vline 
WA_P01T_LST_STR-GRSBS sy-vline 
WA_P01T_LST_STR-LANDD sy-vline 
WA_P01T_LST_STR-ALPLZ sy-vline 
WA_P01T_LST_STR-AGPBX sy-vline 
WA_P01T_LST_STR-GKPLZ sy-vline 
WA_P01T_LST_STR-BEGVB sy-vline 
WA_P01T_LST_STR-VBEZB sy-vline 
WA_P01T_LST_STR-STRKZ sy-vline 
WA_P01T_LST_STR-SIDNR sy-vline 
WA_P01T_LST_STR-BNAME sy-vline 
WA_P01T_LST_STR-ABNAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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