ABAP Select data from SAP table MMPUR_S_REL_REQUEST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_S_REL_REQUEST
*  INTO TABLE @DATA(IT_MMPUR_S_REL_REQUEST2).
*--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_MMPUR_S_REL_REQUEST INDEX 1 INTO DATA(WA_MMPUR_S_REL_REQUEST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_S_REL_REQUEST>-ID = 1.
<MMPUR_S_REL_REQUEST>-DESCRIPTION = 1.
<MMPUR_S_REL_REQUEST>-EXPAND = 1.
<MMPUR_S_REL_REQUEST>-ISSINGLETON = 1.
<MMPUR_S_REL_REQUEST>-ORDER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_S_REL_REQUEST-ATTRIBUTE_REFERENCE, sy-vline,
  WA_MMPUR_S_REL_REQUEST-CONNECTOR_ID, sy-vline,
  WA_MMPUR_S_REL_REQUEST-CATEGORY_ID, sy-vline,
  WA_MMPUR_S_REL_REQUEST-ATTRIBUTE_MAPPING, sy-vline,
  WA_MMPUR_S_REL_REQUEST-RENDERING_TEMPLATE, sy-vline,
  WA_MMPUR_S_REL_REQUEST-TYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_S_REL_REQUEST 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_MMPUR_S_REL_REQUEST 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_MMPUR_S_REL_REQUEST INTO WA_MMPUR_S_REL_REQUEST.


*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_MMPUR_S_REL_REQUEST_STR, 
ID TYPE STRING,
DESCRIPTION TYPE STRING,
EXPAND TYPE STRING,
ISSINGLETON TYPE STRING,
ORDER TYPE STRING,
ATTRIBUTE_REFERENCE TYPE STRING,
CONNECTOR_ID TYPE STRING,
CATEGORY_ID TYPE STRING,
ATTRIBUTE_MAPPING TYPE STRING,
RENDERING_TEMPLATE TYPE STRING,
TYPE TYPE STRING,
PLATFORM TYPE STRING,
TECHNOLOGY TYPE STRING,
WIDTH TYPE STRING,
HEIGHT TYPE STRING,
VARIANT TYPE STRING,
TEMPLATE TYPE STRING,
URL TYPE STRING,
CONDITIONS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_S_REL_REQUEST_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_MMPUR_S_REL_REQUEST_STR-ID sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-DESCRIPTION sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-EXPAND sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-ISSINGLETON sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-ORDER sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-ATTRIBUTE_REFERENCE sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-CONNECTOR_ID sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-CATEGORY_ID sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-ATTRIBUTE_MAPPING sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-RENDERING_TEMPLATE sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-TYPE sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-PLATFORM sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-TECHNOLOGY sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-WIDTH sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-HEIGHT sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-VARIANT sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-TEMPLATE sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-URL sy-vline 
WA_MMPUR_S_REL_REQUEST_STR-CONDITIONS sy-vline      INTO ld_text SEPARATED BY SPACE.

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