ABAP Select data from SAP table MMPUR_REQ_S_DEFAULT_ATTR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MMPUR_REQ_S_DEFAULT_ATTR 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_REQ_S_DEFAULT_ATTR. 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_REQ_S_DEFAULT_ATTR 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_REQ_S_DEFAULT_ATTR TYPE STANDARD TABLE OF MMPUR_REQ_S_DEFAULT_ATTR,
      WA_MMPUR_REQ_S_DEFAULT_ATTR TYPE MMPUR_REQ_S_DEFAULT_ATTR,
      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_REQ_S_DEFAULT_ATTR> TYPE MMPUR_REQ_S_DEFAULT_ATTR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_REQ_S_DEFAULT_ATTR
*  INTO TABLE @DATA(IT_MMPUR_REQ_S_DEFAULT_ATTR2).
*--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_REQ_S_DEFAULT_ATTR INDEX 1 INTO DATA(WA_MMPUR_REQ_S_DEFAULT_ATTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_REQ_S_DEFAULT_ATTR>-PLANT = 1.
<MMPUR_REQ_S_DEFAULT_ATTR>-MATERIALGROUP = 1.
<MMPUR_REQ_S_DEFAULT_ATTR>-PURCHASINGGROUP = 1.
<MMPUR_REQ_S_DEFAULT_ATTR>-ACCOUNTASSIGNMENTCATEGORY = 1.
<MMPUR_REQ_S_DEFAULT_ATTR>-ITEMCATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_REQ_S_DEFAULT_ATTR-DOCUMENTTYPE, sy-vline,
  WA_MMPUR_REQ_S_DEFAULT_ATTR-ASSETSUBNUMBER, sy-vline,
  WA_MMPUR_REQ_S_DEFAULT_ATTR-COMPANYCODE, sy-vline,
  WA_MMPUR_REQ_S_DEFAULT_ATTR-COSTCENTER, sy-vline,
  WA_MMPUR_REQ_S_DEFAULT_ATTR-PURCHASINGORGANISATION, sy-vline,
  WA_MMPUR_REQ_S_DEFAULT_ATTR-GLACCOUNTNUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_REQ_S_DEFAULT_ATTR 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_REQ_S_DEFAULT_ATTR 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_REQ_S_DEFAULT_ATTR INTO WA_MMPUR_REQ_S_DEFAULT_ATTR.


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

*Conversion exit ALPHA, internal->external for field COSTCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_REQ_S_DEFAULT_ATTR-COSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_REQ_S_DEFAULT_ATTR-COSTCENTER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GLACCOUNTNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_REQ_S_DEFAULT_ATTR-GLACCOUNTNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_REQ_S_DEFAULT_ATTR-GLACCOUNTNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NETWORKNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_REQ_S_DEFAULT_ATTR-NETWORKNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_REQ_S_DEFAULT_ATTR-NETWORKNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORDERNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_REQ_S_DEFAULT_ATTR-ORDERNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_REQ_S_DEFAULT_ATTR-ORDERNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field WBSELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_REQ_S_DEFAULT_ATTR-WBSELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_REQ_S_DEFAULT_ATTR-WBSELEMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SALESORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_REQ_S_DEFAULT_ATTR-SALESORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_REQ_S_DEFAULT_ATTR-SALESORDER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ASSETNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_REQ_S_DEFAULT_ATTR-ASSETNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_REQ_S_DEFAULT_ATTR-ASSETNUMBER.
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_MMPUR_REQ_S_DEFAULT_ATTR_STR, 
PLANT TYPE STRING,
MATERIALGROUP TYPE STRING,
PURCHASINGGROUP TYPE STRING,
ACCOUNTASSIGNMENTCATEGORY TYPE STRING,
ITEMCATEGORY TYPE STRING,
DOCUMENTTYPE TYPE STRING,
ASSETSUBNUMBER TYPE STRING,
COMPANYCODE TYPE STRING,
COSTCENTER TYPE STRING,
PURCHASINGORGANISATION TYPE STRING,
GLACCOUNTNUMBER TYPE STRING,
NETWORKNUMBER TYPE STRING,
ORDERNUMBER TYPE STRING,
WBSELEMENT TYPE STRING,
CURRENCY TYPE STRING,
SALESORDER TYPE STRING,
SALESORDERITEM TYPE STRING,
DELIVERYDATE TYPE STRING,
ASSETNUMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_REQ_S_DEFAULT_ATTR_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_REQ_S_DEFAULT_ATTR_STR-PLANT sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-MATERIALGROUP sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-PURCHASINGGROUP sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-ACCOUNTASSIGNMENTCATEGORY sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-ITEMCATEGORY sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-DOCUMENTTYPE sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-ASSETSUBNUMBER sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-COMPANYCODE sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-COSTCENTER sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-PURCHASINGORGANISATION sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-GLACCOUNTNUMBER sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-NETWORKNUMBER sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-ORDERNUMBER sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-WBSELEMENT sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-CURRENCY sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-SALESORDER sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-SALESORDERITEM sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-DELIVERYDATE sy-vline 
WA_MMPUR_REQ_S_DEFAULT_ATTR_STR-ASSETNUMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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