ABAP Select data from SAP table USMDZ_S_CREQUEST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM USMDZ_S_CREQUEST
*  INTO TABLE @DATA(IT_USMDZ_S_CREQUEST2).
*--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_USMDZ_S_CREQUEST INDEX 1 INTO DATA(WA_USMDZ_S_CREQUEST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<USMDZ_S_CREQUEST>-USMD_CREQUEST = 1.
<USMDZ_S_CREQUEST>-USMD_CREQ_TYPE = 1.
<USMDZ_S_CREQUEST>-USMD_EDITION = 1.
<USMDZ_S_CREQUEST>-USMD_CREQ_STATUS = 1.
<USMDZ_S_CREQUEST>-USMD_CREQ_TEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_USMDZ_S_CREQUEST-USMD_CREATED_AT, sy-vline,
  WA_USMDZ_S_CREQUEST-USMD_CREATED_BY, sy-vline,
  WA_USMDZ_S_CREQUEST-USMD_CHANGED_AT, sy-vline,
  WA_USMDZ_S_CREQUEST-USMD_CHANGED_BY, sy-vline,
  WA_USMDZ_S_CREQUEST-USMD_RELEASED_AT, sy-vline,
  WA_USMDZ_S_CREQUEST-USMD_RELEASED_BY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_USMDZ_S_CREQUEST 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_USMDZ_S_CREQUEST 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_USMDZ_S_CREQUEST INTO WA_USMDZ_S_CREQUEST.


*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 USMD_CREQUEST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_USMDZ_S_CREQUEST-USMD_CREQUEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_USMDZ_S_CREQUEST-USMD_CREQUEST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field USMD_EDITION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_USMDZ_S_CREQUEST-USMD_EDITION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_USMDZ_S_CREQUEST-USMD_EDITION.
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_USMDZ_S_CREQUEST_STR, 
USMD_CREQUEST TYPE STRING,
USMD_CREQ_TYPE TYPE STRING,
USMD_EDITION TYPE STRING,
USMD_CREQ_STATUS TYPE STRING,
USMD_CREQ_TEXT TYPE STRING,
USMD_CREATED_AT TYPE STRING,
USMD_CREATED_BY TYPE STRING,
USMD_CHANGED_AT TYPE STRING,
USMD_CHANGED_BY TYPE STRING,
USMD_RELEASED_AT TYPE STRING,
USMD_RELEASED_BY TYPE STRING,
USMD_DRAFT_STEP TYPE STRING,
USMD_PRIORITY TYPE STRING,
USMD_DUE_DATE TYPE STRING,
USMD_REASON TYPE STRING,
USMD_REASON_REJ TYPE STRING,
USMD_ENTITY TYPE STRING,
USMD_FIELDNAME1 TYPE STRING,
USMD_VALUE1 TYPE STRING,
USMD_FIELDNAME2 TYPE STRING,
USMD_VALUE2 TYPE STRING,
USMD_FIELDNAME3 TYPE STRING,
USMD_VALUE3 TYPE STRING,
USMD_MODEL TYPE STRING,
USMD_ACTIVEONLY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_USMDZ_S_CREQUEST_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_USMDZ_S_CREQUEST_STR-USMD_CREQUEST sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_CREQ_TYPE sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_EDITION sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_CREQ_STATUS sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_CREQ_TEXT sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_CREATED_AT sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_CREATED_BY sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_CHANGED_AT sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_CHANGED_BY sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_RELEASED_AT sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_RELEASED_BY sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_DRAFT_STEP sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_PRIORITY sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_DUE_DATE sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_REASON sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_REASON_REJ sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_ENTITY sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_FIELDNAME1 sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_VALUE1 sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_FIELDNAME2 sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_VALUE2 sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_FIELDNAME3 sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_VALUE3 sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_MODEL sy-vline 
WA_USMDZ_S_CREQUEST_STR-USMD_ACTIVEONLY sy-vline      INTO ld_text SEPARATED BY SPACE.

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