ABAP Select data from SAP table CONV_S_REQ_DATA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CONV_S_REQ_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 CONV_S_REQ_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 CONV_S_REQ_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_CONV_S_REQ_DATA TYPE STANDARD TABLE OF CONV_S_REQ_DATA,
      WA_CONV_S_REQ_DATA TYPE CONV_S_REQ_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: <CONV_S_REQ_DATA> TYPE CONV_S_REQ_DATA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CONV_S_REQ_DATA
*  INTO TABLE @DATA(IT_CONV_S_REQ_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_CONV_S_REQ_DATA INDEX 1 INTO DATA(WA_CONV_S_REQ_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CONV_S_REQ_DATA>-DMU_GUID = 1.
<CONV_S_REQ_DATA>-DOCUMENTTYPE = 1.
<CONV_S_REQ_DATA>-DOCUMENTNUMBER = 1.
<CONV_S_REQ_DATA>-DOCUMENTPART = 1.
<CONV_S_REQ_DATA>-DOCUMENTVERSION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CONV_S_REQ_DATA-APPNR, sy-vline,
  WA_CONV_S_REQ_DATA-PH_OBJID, sy-vline,
  WA_CONV_S_REQ_DATA-DMU_CNT4, sy-vline,
  WA_CONV_S_REQ_DATA-STLTY, sy-vline,
  WA_CONV_S_REQ_DATA-STLNR, sy-vline,
  WA_CONV_S_REQ_DATA-STLAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CONV_S_REQ_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_CONV_S_REQ_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_CONV_S_REQ_DATA INTO WA_CONV_S_REQ_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 DOCUMENTNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CONV_S_REQ_DATA-DOCUMENTNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CONV_S_REQ_DATA-DOCUMENTNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field STLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CONV_S_REQ_DATA-STLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CONV_S_REQ_DATA-STLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STLAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CONV_S_REQ_DATA-STLAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CONV_S_REQ_DATA-STLAL.
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_CONV_S_REQ_DATA_STR, 
DMU_GUID TYPE STRING,
DOCUMENTTYPE TYPE STRING,
DOCUMENTNUMBER TYPE STRING,
DOCUMENTPART TYPE STRING,
DOCUMENTVERSION TYPE STRING,
APPNR TYPE STRING,
PH_OBJID TYPE STRING,
DMU_CNT4 TYPE STRING,
STLTY TYPE STRING,
STLNR TYPE STRING,
STLAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CONV_S_REQ_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_CONV_S_REQ_DATA_STR-DMU_GUID sy-vline 
WA_CONV_S_REQ_DATA_STR-DOCUMENTTYPE sy-vline 
WA_CONV_S_REQ_DATA_STR-DOCUMENTNUMBER sy-vline 
WA_CONV_S_REQ_DATA_STR-DOCUMENTPART sy-vline 
WA_CONV_S_REQ_DATA_STR-DOCUMENTVERSION sy-vline 
WA_CONV_S_REQ_DATA_STR-APPNR sy-vline 
WA_CONV_S_REQ_DATA_STR-PH_OBJID sy-vline 
WA_CONV_S_REQ_DATA_STR-DMU_CNT4 sy-vline 
WA_CONV_S_REQ_DATA_STR-STLTY sy-vline 
WA_CONV_S_REQ_DATA_STR-STLNR sy-vline 
WA_CONV_S_REQ_DATA_STR-STLAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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