ABAP Select data from SAP table P2001_AF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2001_AF 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 P2001_AF. 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 P2001_AF 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_P2001_AF TYPE STANDARD TABLE OF P2001_AF,
      WA_P2001_AF TYPE P2001_AF,
      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: <P2001_AF> TYPE P2001_AF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2001_AF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2001_AF
  INTO TABLE IT_P2001_AF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2001_AF
*  INTO TABLE @DATA(IT_P2001_AF2).
*--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_P2001_AF INDEX 1 INTO DATA(WA_P2001_AF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2001_AF ASSIGNING <P2001_AF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2001_AF>-REPTT = 1.
<P2001_AF>-BEGDA = 1.
<P2001_AF>-ENDDA = 1.
<P2001_AF>-PLANNED = 1.
<P2001_AF>-PLANNEDW = 1.

ENDLOOP.

LOOP AT IT_P2001_AF INTO WA_P2001_AF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2001_AF-ABSHRS, sy-vline,
  WA_P2001_AF-PERCENT, sy-vline,
  WA_P2001_AF-PYRHRS, sy-vline,
  WA_P2001_AF-ABSDAY, sy-vline,
  WA_P2001_AF-CALDAY, sy-vline,
  WA_P2001_AF-PYRDAY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2001_AF 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_P2001_AF 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_P2001_AF INTO WA_P2001_AF.


*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 TDTYP, internal->external for field TDTYPE
CALL FUNCTION 'CONVERSION_EXIT_TDTYP_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-TDTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-TDTYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL_CO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-KOSTL_CO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-KOSTL_CO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR_CO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-AUFNR_CO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-AUFNR_CO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field PS_PO_CO
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-PS_PO_CO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-PS_PO_CO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR_CO
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-VORNR_CO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-VORNR_CO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NPLNR_CO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-NPLNR_CO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-NPLNR_CO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIS, internal->external for field FIPOS_CO
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-FIPOS_CO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-FIPOS_CO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL_AR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-KOSTL_AR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-KOSTL_AR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR_AR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-AUFNR_AR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-AUFNR_AR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field PS_PO_AR
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-PS_PO_AR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-PS_PO_AR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CO_PR_AR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-CO_PR_AR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-CO_PR_AR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NPLNR_AR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-NPLNR_AR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-NPLNR_AR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR_AR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-VORNR_AR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-VORNR_AR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL_AS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P2001_AF-KOSTL_AS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2001_AF-KOSTL_AS.
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_P2001_AF_STR, 
REPTT TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
PLANNED TYPE STRING,
PLANNEDW TYPE STRING,
ABSHRS TYPE STRING,
PERCENT TYPE STRING,
PYRHRS TYPE STRING,
ABSDAY TYPE STRING,
CALDAY TYPE STRING,
PYRDAY TYPE STRING,
INDCOS TYPE STRING,
ABSTP TYPE STRING,
TDTYPE TYPE STRING,
BUKRS_CO TYPE STRING,
GSBER_CO TYPE STRING,
KOKRS_CO TYPE STRING,
KOSTL_CO TYPE STRING,
AUFNR_CO TYPE STRING,
PS_PO_CO TYPE STRING,
LSTAR_CO TYPE STRING,
VORNR_CO TYPE STRING,
NPLNR_CO TYPE STRING,
FISTL_CO TYPE STRING,
FIPOS_CO TYPE STRING,
GEBER_CO TYPE STRING,
DART_CO TYPE STRING,
UDART_CO TYPE STRING,
BUKRS_AR TYPE STRING,
KOKRS_AR TYPE STRING,
GSBER_AR TYPE STRING,
KOSTL_AR TYPE STRING,
AUFNR_AR TYPE STRING,
PS_PO_AR TYPE STRING,
CO_PR_AR TYPE STRING,
NPLNR_AR TYPE STRING,
VORNR_AR TYPE STRING,
BUKRS_AS TYPE STRING,
GSBER_AS TYPE STRING,
KOSTL_AS TYPE STRING,
LSTAR_AS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2001_AF_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_P2001_AF_STR-REPTT sy-vline 
WA_P2001_AF_STR-BEGDA sy-vline 
WA_P2001_AF_STR-ENDDA sy-vline 
WA_P2001_AF_STR-PLANNED sy-vline 
WA_P2001_AF_STR-PLANNEDW sy-vline 
WA_P2001_AF_STR-ABSHRS sy-vline 
WA_P2001_AF_STR-PERCENT sy-vline 
WA_P2001_AF_STR-PYRHRS sy-vline 
WA_P2001_AF_STR-ABSDAY sy-vline 
WA_P2001_AF_STR-CALDAY sy-vline 
WA_P2001_AF_STR-PYRDAY sy-vline 
WA_P2001_AF_STR-INDCOS sy-vline 
WA_P2001_AF_STR-ABSTP sy-vline 
WA_P2001_AF_STR-TDTYPE sy-vline 
WA_P2001_AF_STR-BUKRS_CO sy-vline 
WA_P2001_AF_STR-GSBER_CO sy-vline 
WA_P2001_AF_STR-KOKRS_CO sy-vline 
WA_P2001_AF_STR-KOSTL_CO sy-vline 
WA_P2001_AF_STR-AUFNR_CO sy-vline 
WA_P2001_AF_STR-PS_PO_CO sy-vline 
WA_P2001_AF_STR-LSTAR_CO sy-vline 
WA_P2001_AF_STR-VORNR_CO sy-vline 
WA_P2001_AF_STR-NPLNR_CO sy-vline 
WA_P2001_AF_STR-FISTL_CO sy-vline 
WA_P2001_AF_STR-FIPOS_CO sy-vline 
WA_P2001_AF_STR-GEBER_CO sy-vline 
WA_P2001_AF_STR-DART_CO sy-vline 
WA_P2001_AF_STR-UDART_CO sy-vline 
WA_P2001_AF_STR-BUKRS_AR sy-vline 
WA_P2001_AF_STR-KOKRS_AR sy-vline 
WA_P2001_AF_STR-GSBER_AR sy-vline 
WA_P2001_AF_STR-KOSTL_AR sy-vline 
WA_P2001_AF_STR-AUFNR_AR sy-vline 
WA_P2001_AF_STR-PS_PO_AR sy-vline 
WA_P2001_AF_STR-CO_PR_AR sy-vline 
WA_P2001_AF_STR-NPLNR_AR sy-vline 
WA_P2001_AF_STR-VORNR_AR sy-vline 
WA_P2001_AF_STR-BUKRS_AS sy-vline 
WA_P2001_AF_STR-GSBER_AS sy-vline 
WA_P2001_AF_STR-KOSTL_AS sy-vline 
WA_P2001_AF_STR-LSTAR_AS sy-vline      INTO ld_text SEPARATED BY SPACE.

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