ABAP Select data from SAP table ATP_SCHEDULING_INPUT_DATA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ATP_SCHEDULING_INPUT_DATA 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_SCHEDULING_INPUT_DATA. 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_SCHEDULING_INPUT_DATA 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_SCHEDULING_INPUT_DATA TYPE STANDARD TABLE OF ATP_SCHEDULING_INPUT_DATA,
      WA_ATP_SCHEDULING_INPUT_DATA TYPE ATP_SCHEDULING_INPUT_DATA,
      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_SCHEDULING_INPUT_DATA> TYPE ATP_SCHEDULING_INPUT_DATA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ATP_SCHEDULING_INPUT_DATA
*  INTO TABLE @DATA(IT_ATP_SCHEDULING_INPUT_DATA2).
*--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_SCHEDULING_INPUT_DATA INDEX 1 INTO DATA(WA_ATP_SCHEDULING_INPUT_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ATP_SCHEDULING_INPUT_DATA>-ATPCAT = 1.
<ATP_SCHEDULING_INPUT_DATA>-DELNR = 1.
<ATP_SCHEDULING_INPUT_DATA>-DELPS = 1.
<ATP_SCHEDULING_INPUT_DATA>-SUBITEM = 1.
<ATP_SCHEDULING_INPUT_DATA>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ATP_SCHEDULING_INPUT_DATA-WERKS_TIMEZONE, sy-vline,
  WA_ATP_SCHEDULING_INPUT_DATA-VSTEL, sy-vline,
  WA_ATP_SCHEDULING_INPUT_DATA-LADGR, sy-vline,
  WA_ATP_SCHEDULING_INPUT_DATA-ROUTE, sy-vline,
  WA_ATP_SCHEDULING_INPUT_DATA-KUNWE, sy-vline,
  WA_ATP_SCHEDULING_INPUT_DATA-KUNWE_TIMEZONE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ATP_SCHEDULING_INPUT_DATA 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_SCHEDULING_INPUT_DATA 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_SCHEDULING_INPUT_DATA INTO WA_ATP_SCHEDULING_INPUT_DATA.


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

*Conversion exit AUART, internal->external for field AUART
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_ATP_SCHEDULING_INPUT_DATA-AUART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATP_SCHEDULING_INPUT_DATA-AUART.
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_SCHEDULING_INPUT_DATA_STR, 
ATPCAT TYPE STRING,
DELNR TYPE STRING,
DELPS TYPE STRING,
SUBITEM TYPE STRING,
WERKS TYPE STRING,
WERKS_TIMEZONE TYPE STRING,
VSTEL TYPE STRING,
LADGR TYPE STRING,
ROUTE TYPE STRING,
KUNWE TYPE STRING,
KUNWE_TIMEZONE TYPE STRING,
VSBED TYPE STRING,
TRAGR TYPE STRING,
WEBAZ TYPE STRING,
AUART TYPE STRING,
BSTYP TYPE STRING,
BSART TYPE STRING,
RESWK TYPE STRING,
RESLO TYPE STRING,
ABLAD TYPE STRING,
PLIFZ TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ATP_SCHEDULING_INPUT_DATA_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_SCHEDULING_INPUT_DATA_STR-ATPCAT sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-DELNR sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-DELPS sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-SUBITEM sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-WERKS sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-WERKS_TIMEZONE sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-VSTEL sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-LADGR sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-ROUTE sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-KUNWE sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-KUNWE_TIMEZONE sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-VSBED sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-TRAGR sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-WEBAZ sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-AUART sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-BSTYP sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-BSART sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-RESWK sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-RESLO sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-ABLAD sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-PLIFZ sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-VKORG sy-vline 
WA_ATP_SCHEDULING_INPUT_DATA_STR-VTWEG sy-vline      INTO ld_text SEPARATED BY SPACE.

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