ABAP Select data from SAP table /SAPAPO/V_MMPREQ into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/V_MMPREQ 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 /SAPAPO/V_MMPREQ. 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 /SAPAPO/V_MMPREQ 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_/SAPAPO/V_MMPREQ TYPE STANDARD TABLE OF /SAPAPO/V_MMPREQ,
      WA_/SAPAPO/V_MMPREQ TYPE /SAPAPO/V_MMPREQ,
      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: </SAPAPO/V_MMPREQ> TYPE /SAPAPO/V_MMPREQ.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/V_MMPREQ
  INTO TABLE IT_/SAPAPO/V_MMPREQ.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/V_MMPREQ
*  INTO TABLE @DATA(IT_/SAPAPO/V_MMPREQ2).
*--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_/SAPAPO/V_MMPREQ INDEX 1 INTO DATA(WA_/SAPAPO/V_MMPREQ2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/V_MMPREQ ASSIGNING </SAPAPO/V_MMPREQ>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/V_MMPREQ>-MANDT = 1.
</SAPAPO/V_MMPREQ>-ORDER_ID = 1.
</SAPAPO/V_MMPREQ>-ITEM_ID = 1.
</SAPAPO/V_MMPREQ>-PREQ_ITEM_NO = 1.
</SAPAPO/V_MMPREQ>-ITEM_TYPE = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/V_MMPREQ INTO WA_/SAPAPO/V_MMPREQ.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/V_MMPREQ-MATERIAL_NO, sy-vline,
  WA_/SAPAPO/V_MMPREQ-PLANT_TO, sy-vline,
  WA_/SAPAPO/V_MMPREQ-PLANT_FROM, sy-vline,
  WA_/SAPAPO/V_MMPREQ-VENDOR, sy-vline,
  WA_/SAPAPO/V_MMPREQ-PREQ_UOM, sy-vline,
  WA_/SAPAPO/V_MMPREQ-DELIVERY_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/V_MMPREQ 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_/SAPAPO/V_MMPREQ 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_/SAPAPO/V_MMPREQ INTO WA_/SAPAPO/V_MMPREQ.


*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_NO
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/V_MMPREQ-MATERIAL_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/V_MMPREQ-MATERIAL_NO.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit TSTLC, internal->external for field DELIVERY_TMST
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/V_MMPREQ-DELIVERY_TMST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/V_MMPREQ-DELIVERY_TMST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field SHIPPING_TMST
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/V_MMPREQ-SHIPPING_TMST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/V_MMPREQ-SHIPPING_TMST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field AVAILABLE_TMST
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/V_MMPREQ-AVAILABLE_TMST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/V_MMPREQ-AVAILABLE_TMST.
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_/SAPAPO/V_MMPREQ_STR, 
MANDT TYPE STRING,
ORDER_ID TYPE STRING,
ITEM_ID TYPE STRING,
PREQ_ITEM_NO TYPE STRING,
ITEM_TYPE TYPE STRING,
MATERIAL_NO TYPE STRING,
PLANT_TO TYPE STRING,
PLANT_FROM TYPE STRING,
VENDOR TYPE STRING,
PREQ_UOM TYPE STRING,
DELIVERY_DATE TYPE STRING,
DELIVERY_TIME TYPE STRING,
DELIVERY_TMST TYPE STRING,
SHIPPING_TMST TYPE STRING,
AVAILABLE_TMST TYPE STRING,
SOS_ID_INT TYPE STRING,
SOS_ID_EXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/V_MMPREQ_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_/SAPAPO/V_MMPREQ_STR-MANDT sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-ORDER_ID sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-ITEM_ID sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-PREQ_ITEM_NO sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-ITEM_TYPE sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-MATERIAL_NO sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-PLANT_TO sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-PLANT_FROM sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-VENDOR sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-PREQ_UOM sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-DELIVERY_DATE sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-DELIVERY_TIME sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-DELIVERY_TMST sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-SHIPPING_TMST sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-AVAILABLE_TMST sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-SOS_ID_INT sy-vline 
WA_/SAPAPO/V_MMPREQ_STR-SOS_ID_EXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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