ABAP Select data from SAP table SCHEDEV_ATP4A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SCHEDEV_ATP4A 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 SCHEDEV_ATP4A. 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 SCHEDEV_ATP4A 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_SCHEDEV_ATP4A TYPE STANDARD TABLE OF SCHEDEV_ATP4A,
      WA_SCHEDEV_ATP4A TYPE SCHEDEV_ATP4A,
      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: <SCHEDEV_ATP4A> TYPE SCHEDEV_ATP4A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SCHEDEV_ATP4A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SCHEDEV_ATP4A
  INTO TABLE IT_SCHEDEV_ATP4A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SCHEDEV_ATP4A
*  INTO TABLE @DATA(IT_SCHEDEV_ATP4A2).
*--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_SCHEDEV_ATP4A INDEX 1 INTO DATA(WA_SCHEDEV_ATP4A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SCHEDEV_ATP4A ASSIGNING <SCHEDEV_ATP4A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SCHEDEV_ATP4A>-MBDAT = 1.
<SCHEDEV_ATP4A>-MBUHR = 1.
<SCHEDEV_ATP4A>-TDDAT = 1.
<SCHEDEV_ATP4A>-TDUHR = 1.
<SCHEDEV_ATP4A>-LDDAT = 1.

ENDLOOP.

LOOP AT IT_SCHEDEV_ATP4A INTO WA_SCHEDEV_ATP4A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SCHEDEV_ATP4A-LDUHR, sy-vline,
  WA_SCHEDEV_ATP4A-WADAT, sy-vline,
  WA_SCHEDEV_ATP4A-WAUHR, sy-vline,
  WA_SCHEDEV_ATP4A-LFDAT, sy-vline,
  WA_SCHEDEV_ATP4A-LFUHR, sy-vline,
  WA_SCHEDEV_ATP4A-DATLO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SCHEDEV_ATP4A 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_SCHEDEV_ATP4A 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_SCHEDEV_ATP4A INTO WA_SCHEDEV_ATP4A.


*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_SCHEDEV_ATP4A_STR, 
MBDAT TYPE STRING,
MBUHR TYPE STRING,
TDDAT TYPE STRING,
TDUHR TYPE STRING,
LDDAT TYPE STRING,
LDUHR TYPE STRING,
WADAT TYPE STRING,
WAUHR TYPE STRING,
LFDAT TYPE STRING,
LFUHR TYPE STRING,
DATLO TYPE STRING,
TIMLO TYPE STRING,
AULWE TYPE STRING,
ELDAT TYPE STRING,
ELUHR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SCHEDEV_ATP4A_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_SCHEDEV_ATP4A_STR-MBDAT sy-vline 
WA_SCHEDEV_ATP4A_STR-MBUHR sy-vline 
WA_SCHEDEV_ATP4A_STR-TDDAT sy-vline 
WA_SCHEDEV_ATP4A_STR-TDUHR sy-vline 
WA_SCHEDEV_ATP4A_STR-LDDAT sy-vline 
WA_SCHEDEV_ATP4A_STR-LDUHR sy-vline 
WA_SCHEDEV_ATP4A_STR-WADAT sy-vline 
WA_SCHEDEV_ATP4A_STR-WAUHR sy-vline 
WA_SCHEDEV_ATP4A_STR-LFDAT sy-vline 
WA_SCHEDEV_ATP4A_STR-LFUHR sy-vline 
WA_SCHEDEV_ATP4A_STR-DATLO sy-vline 
WA_SCHEDEV_ATP4A_STR-TIMLO sy-vline 
WA_SCHEDEV_ATP4A_STR-AULWE sy-vline 
WA_SCHEDEV_ATP4A_STR-ELDAT sy-vline 
WA_SCHEDEV_ATP4A_STR-ELUHR sy-vline      INTO ld_text SEPARATED BY SPACE.

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