ABAP Select data from SAP table ATP_RESB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ATP_RESB
*  INTO TABLE @DATA(IT_ATP_RESB2).
*--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_ATP_RESB INDEX 1 INTO DATA(WA_ATP_RESB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ATP_RESB>-MANDT = 1.
<ATP_RESB>-RSNUM = 1.
<ATP_RESB>-RSPOS = 1.
<ATP_RESB>-RSART = 1.
<ATP_RESB>-XLOEK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ATP_RESB-KZEAR, sy-vline,
  WA_ATP_RESB-MATNR, sy-vline,
  WA_ATP_RESB-WERKS, sy-vline,
  WA_ATP_RESB-LGORT, sy-vline,
  WA_ATP_RESB-CHARG, sy-vline,
  WA_ATP_RESB-SOBKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ATP_RESB 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_ATP_RESB 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_ATP_RESB INTO WA_ATP_RESB.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ATP_RESB-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATP_RESB-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ATP_RESB-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATP_RESB-MEINS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSP, internal->external for field PSPEL
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_ATP_RESB-PSPEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATP_RESB-PSPEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field BAUGR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ATP_RESB-BAUGR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATP_RESB-BAUGR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ATP_RESB-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATP_RESB-EBELN.
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_ATP_RESB_STR, 
MANDT TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
XLOEK TYPE STRING,
KZEAR TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
BDTER TYPE STRING,
SBTER TYPE STRING,
BDART TYPE STRING,
SHKZG TYPE STRING,
XWAOK TYPE STRING,
AUFNR TYPE STRING,
BDMNG TYPE STRING,
VMENG TYPE STRING,
ENMNG TYPE STRING,
MEINS TYPE STRING,
UMWRK TYPE STRING,
UMLGO TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PSPEL TYPE STRING,
TXTPS TYPE STRING,
DUMPS TYPE STRING,
SCHGT TYPE STRING,
DBSKZ TYPE STRING,
NDISP TYPE STRING,
VORAB TYPE STRING,
BAUGR TYPE STRING,
LIFNR TYPE STRING,
UMSOK TYPE STRING,
SGT_SCAT TYPE STRING,
SGT_RCAT TYPE STRING,
POSTP TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
EBELE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ATP_RESB_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_ATP_RESB_STR-MANDT sy-vline 
WA_ATP_RESB_STR-RSNUM sy-vline 
WA_ATP_RESB_STR-RSPOS sy-vline 
WA_ATP_RESB_STR-RSART sy-vline 
WA_ATP_RESB_STR-XLOEK sy-vline 
WA_ATP_RESB_STR-KZEAR sy-vline 
WA_ATP_RESB_STR-MATNR sy-vline 
WA_ATP_RESB_STR-WERKS sy-vline 
WA_ATP_RESB_STR-LGORT sy-vline 
WA_ATP_RESB_STR-CHARG sy-vline 
WA_ATP_RESB_STR-SOBKZ sy-vline 
WA_ATP_RESB_STR-BDTER sy-vline 
WA_ATP_RESB_STR-SBTER sy-vline 
WA_ATP_RESB_STR-BDART sy-vline 
WA_ATP_RESB_STR-SHKZG sy-vline 
WA_ATP_RESB_STR-XWAOK sy-vline 
WA_ATP_RESB_STR-AUFNR sy-vline 
WA_ATP_RESB_STR-BDMNG sy-vline 
WA_ATP_RESB_STR-VMENG sy-vline 
WA_ATP_RESB_STR-ENMNG sy-vline 
WA_ATP_RESB_STR-MEINS sy-vline 
WA_ATP_RESB_STR-UMWRK sy-vline 
WA_ATP_RESB_STR-UMLGO sy-vline 
WA_ATP_RESB_STR-KDAUF sy-vline 
WA_ATP_RESB_STR-KDPOS sy-vline 
WA_ATP_RESB_STR-PSPEL sy-vline 
WA_ATP_RESB_STR-TXTPS sy-vline 
WA_ATP_RESB_STR-DUMPS sy-vline 
WA_ATP_RESB_STR-SCHGT sy-vline 
WA_ATP_RESB_STR-DBSKZ sy-vline 
WA_ATP_RESB_STR-NDISP sy-vline 
WA_ATP_RESB_STR-VORAB sy-vline 
WA_ATP_RESB_STR-BAUGR sy-vline 
WA_ATP_RESB_STR-LIFNR sy-vline 
WA_ATP_RESB_STR-UMSOK sy-vline 
WA_ATP_RESB_STR-SGT_SCAT sy-vline 
WA_ATP_RESB_STR-SGT_RCAT sy-vline 
WA_ATP_RESB_STR-POSTP sy-vline 
WA_ATP_RESB_STR-EBELN sy-vline 
WA_ATP_RESB_STR-EBELP sy-vline 
WA_ATP_RESB_STR-EBELE sy-vline      INTO ld_text SEPARATED BY SPACE.

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