ABAP Select data from SAP table SCWH_VALIDITY_INTERVAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SCWH_VALIDITY_INTERVAL
*  INTO TABLE @DATA(IT_SCWH_VALIDITY_INTERVAL2).
*--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_SCWH_VALIDITY_INTERVAL INDEX 1 INTO DATA(WA_SCWH_VALIDITY_INTERVAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SCWH_VALIDITY_INTERVAL>-TRACK = 1.
<SCWH_VALIDITY_INTERVAL>-PAKID = 1.
<SCWH_VALIDITY_INTERVAL>-TYPID = 1.
<SCWH_VALIDITY_INTERVAL>-ALSID = 1.
<SCWH_VALIDITY_INTERVAL>-LO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SCWH_VALIDITY_INTERVAL-PAKID, sy-vline,
  WA_SCWH_VALIDITY_INTERVAL-ALEID, sy-vline,
  WA_SCWH_VALIDITY_INTERVAL-HI, sy-vline,
  WA_SCWH_VALIDITY_INTERVAL-PAKID, sy-vline,
  WA_SCWH_VALIDITY_INTERVAL-ALEID, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_SCWH_VALIDITY_INTERVAL 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_SCWH_VALIDITY_INTERVAL 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_SCWH_VALIDITY_INTERVAL INTO WA_SCWH_VALIDITY_INTERVAL.


*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_SCWH_VALIDITY_INTERVAL_STR, 
TRACK TYPE STRING,
PAKID TYPE STRING,
TYPID TYPE STRING,
ALSID TYPE STRING,
LO TYPE STRING,
PAKID TYPE STRING,
ALEID TYPE STRING,
HI TYPE STRING,
PAKID TYPE STRING,
ALEID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SCWH_VALIDITY_INTERVAL_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_SCWH_VALIDITY_INTERVAL_STR-TRACK sy-vline 
WA_SCWH_VALIDITY_INTERVAL_STR-PAKID sy-vline 
WA_SCWH_VALIDITY_INTERVAL_STR-TYPID sy-vline 
WA_SCWH_VALIDITY_INTERVAL_STR-ALSID sy-vline 
WA_SCWH_VALIDITY_INTERVAL_STR-LO sy-vline 
WA_SCWH_VALIDITY_INTERVAL_STR-PAKID sy-vline 
WA_SCWH_VALIDITY_INTERVAL_STR-ALEID sy-vline 
WA_SCWH_VALIDITY_INTERVAL_STR-HI sy-vline 
WA_SCWH_VALIDITY_INTERVAL_STR-PAKID sy-vline 
WA_SCWH_VALIDITY_INTERVAL_STR-ALEID sy-vline      INTO ld_text SEPARATED BY SPACE.

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