ABAP Select data from SAP table MMPUR_PR_S_PO_ITEM_D into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MMPUR_PR_S_PO_ITEM_D 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_PR_S_PO_ITEM_D. 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_PR_S_PO_ITEM_D 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_PR_S_PO_ITEM_D TYPE STANDARD TABLE OF MMPUR_PR_S_PO_ITEM_D,
      WA_MMPUR_PR_S_PO_ITEM_D TYPE MMPUR_PR_S_PO_ITEM_D,
      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_PR_S_PO_ITEM_D> TYPE MMPUR_PR_S_PO_ITEM_D.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_PR_S_PO_ITEM_D
*  INTO TABLE @DATA(IT_MMPUR_PR_S_PO_ITEM_D2).
*--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_PR_S_PO_ITEM_D INDEX 1 INTO DATA(WA_MMPUR_PR_S_PO_ITEM_D2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_PR_S_PO_ITEM_D>-PO_ITEM = 1.
<MMPUR_PR_S_PO_ITEM_D>-SHORT_TEXT = 1.
<MMPUR_PR_S_PO_ITEM_D>-MATERIAL = 1.
<MMPUR_PR_S_PO_ITEM_D>-MATERIAL_EXTERNAL = 1.
<MMPUR_PR_S_PO_ITEM_D>-MATERIAL_GUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_PR_S_PO_ITEM_D-PO_UNIT, sy-vline,
  WA_MMPUR_PR_S_PO_ITEM_D-QUANTITY, sy-vline,
  WA_MMPUR_PR_S_PO_ITEM_D-VEND_MAT, sy-vline,
  WA_MMPUR_PR_S_PO_ITEM_D-INFO_REC, sy-vline,
  WA_MMPUR_PR_S_PO_ITEM_D-MATL_GROUP, sy-vline,
  WA_MMPUR_PR_S_PO_ITEM_D-PLANT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_PR_S_PO_ITEM_D 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_PR_S_PO_ITEM_D 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_PR_S_PO_ITEM_D INTO WA_MMPUR_PR_S_PO_ITEM_D.


*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 MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_PR_S_PO_ITEM_D-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_PR_S_PO_ITEM_D-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATNL, internal->external for field MATERIAL_EXTERNAL
CALL FUNCTION 'CONVERSION_EXIT_MATNL_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_PR_S_PO_ITEM_D-MATERIAL_EXTERNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_PR_S_PO_ITEM_D-MATERIAL_EXTERNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PO_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_PR_S_PO_ITEM_D-PO_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_PR_S_PO_ITEM_D-PO_UNIT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit FMCIS, internal->external for field CMMT_ITEM
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_PR_S_PO_ITEM_D-CMMT_ITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_PR_S_PO_ITEM_D-CMMT_ITEM.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field PREQ_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_PR_S_PO_ITEM_D-PREQ_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_PR_S_PO_ITEM_D-PREQ_NO.
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_PR_S_PO_ITEM_D_STR, 
PO_ITEM TYPE STRING,
SHORT_TEXT TYPE STRING,
MATERIAL TYPE STRING,
MATERIAL_EXTERNAL TYPE STRING,
MATERIAL_GUID TYPE STRING,
PO_UNIT TYPE STRING,
QUANTITY TYPE STRING,
VEND_MAT TYPE STRING,
INFO_REC TYPE STRING,
MATL_GROUP TYPE STRING,
PLANT TYPE STRING,
PO_UNIT_ISO TYPE STRING,
NET_PRICE TYPE STRING,
PRICE_UNIT TYPE STRING,
ITEM_CAT TYPE STRING,
AGREEEMENT TYPE STRING,
AGMT_ITEM TYPE STRING,
COND_GROUP TYPE STRING,
CMMT_ITEM TYPE STRING,
RFQ_NO TYPE STRING,
RFQ_ITEM TYPE STRING,
PREQ_NO TYPE STRING,
PREQ_ITEM TYPE STRING,
DRAFT_ID TYPE STRING,
CURRENCY TYPE STRING,
TOTALPRICE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_PR_S_PO_ITEM_D_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_PR_S_PO_ITEM_D_STR-PO_ITEM sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-SHORT_TEXT sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-MATERIAL sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-MATERIAL_EXTERNAL sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-MATERIAL_GUID sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-PO_UNIT sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-QUANTITY sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-VEND_MAT sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-INFO_REC sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-MATL_GROUP sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-PLANT sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-PO_UNIT_ISO sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-NET_PRICE sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-PRICE_UNIT sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-ITEM_CAT sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-AGREEEMENT sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-AGMT_ITEM sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-COND_GROUP sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-CMMT_ITEM sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-RFQ_NO sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-RFQ_ITEM sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-PREQ_NO sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-PREQ_ITEM sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-DRAFT_ID sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-CURRENCY sy-vline 
WA_MMPUR_PR_S_PO_ITEM_D_STR-TOTALPRICE sy-vline      INTO ld_text SEPARATED BY SPACE.

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