ABAP Select data from SAP table MMPUR_STR_HISTORYDETAILS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MMPUR_STR_HISTORYDETAILS 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_STR_HISTORYDETAILS. 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_STR_HISTORYDETAILS 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_STR_HISTORYDETAILS TYPE STANDARD TABLE OF MMPUR_STR_HISTORYDETAILS,
      WA_MMPUR_STR_HISTORYDETAILS TYPE MMPUR_STR_HISTORYDETAILS,
      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_STR_HISTORYDETAILS> TYPE MMPUR_STR_HISTORYDETAILS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_STR_HISTORYDETAILS
*  INTO TABLE @DATA(IT_MMPUR_STR_HISTORYDETAILS2).
*--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_STR_HISTORYDETAILS INDEX 1 INTO DATA(WA_MMPUR_STR_HISTORYDETAILS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_STR_HISTORYDETAILS>-MANDT = 1.
<MMPUR_STR_HISTORYDETAILS>-EBELN = 1.
<MMPUR_STR_HISTORYDETAILS>-EBELP = 1.
<MMPUR_STR_HISTORYDETAILS>-BELNR = 1.
<MMPUR_STR_HISTORYDETAILS>-BUZEI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_STR_HISTORYDETAILS-VGABE, sy-vline,
  WA_MMPUR_STR_HISTORYDETAILS-GJAHR, sy-vline,
  WA_MMPUR_STR_HISTORYDETAILS-ETENR, sy-vline,
  WA_MMPUR_STR_HISTORYDETAILS-ISFINALSCHEDULELINE, sy-vline,
  WA_MMPUR_STR_HISTORYDETAILS-HASREVERSAL, sy-vline,
  WA_MMPUR_STR_HISTORYDETAILS-BSART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_STR_HISTORYDETAILS 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_STR_HISTORYDETAILS 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_STR_HISTORYDETAILS INTO WA_MMPUR_STR_HISTORYDETAILS.


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

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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_STR_HISTORYDETAILS-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_STR_HISTORYDETAILS-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PURCHASINGCATEGORY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_STR_HISTORYDETAILS-PURCHASINGCATEGORY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_STR_HISTORYDETAILS-PURCHASINGCATEGORY.
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_STR_HISTORYDETAILS_STR, 
MANDT TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
VGABE TYPE STRING,
GJAHR TYPE STRING,
ETENR TYPE STRING,
ISFINALSCHEDULELINE TYPE STRING,
HASREVERSAL TYPE STRING,
BSART TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
WERKS TYPE STRING,
MATKL TYPE STRING,
PURCHASINGCATEGORY TYPE STRING,
BUDAT TYPE STRING,
MENGE TYPE STRING,
FIRSTGRPOSTINGDATE TYPE STRING,
FINALGRPOSTINGDATE TYPE STRING,
TOTALDELIVEREDQUANTITY TYPE STRING,
LASTDELIVEREDQUANTITY TYPE STRING,
GRSATISFYINGSCHEDLINE TYPE STRING,
OUTSTANDINGQTYCURRGR TYPE STRING,
OUTSTANDINGQTYLASTGR TYPE STRING,
TIMEVARIANCE TYPE STRING,
TIMEVARIANCEBYDELIEVERYDATE TYPE STRING,
TIMEVARIANCEINPCT TYPE STRING,
TIMEVARIANCEINPCTBYDELIVDATE TYPE STRING,
TIMEVARIANCEINPCTWITHSIGN TYPE STRING,
TIMEVARCINPCTWITHSIGNBYDD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_STR_HISTORYDETAILS_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_STR_HISTORYDETAILS_STR-MANDT sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-EBELN sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-EBELP sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-BELNR sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-BUZEI sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-VGABE sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-GJAHR sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-ETENR sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-ISFINALSCHEDULELINE sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-HASREVERSAL sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-BSART sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-EKORG sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-EKGRP sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-WERKS sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-MATKL sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-PURCHASINGCATEGORY sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-BUDAT sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-MENGE sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-FIRSTGRPOSTINGDATE sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-FINALGRPOSTINGDATE sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-TOTALDELIVEREDQUANTITY sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-LASTDELIVEREDQUANTITY sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-GRSATISFYINGSCHEDLINE sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-OUTSTANDINGQTYCURRGR sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-OUTSTANDINGQTYLASTGR sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-TIMEVARIANCE sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-TIMEVARIANCEBYDELIEVERYDATE sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-TIMEVARIANCEINPCT sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-TIMEVARIANCEINPCTBYDELIVDATE sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-TIMEVARIANCEINPCTWITHSIGN sy-vline 
WA_MMPUR_STR_HISTORYDETAILS_STR-TIMEVARCINPCTWITHSIGNBYDD sy-vline      INTO ld_text SEPARATED BY SPACE.

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