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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/MATPRF
*  INTO TABLE @DATA(IT_/SAPAPO/MATPRF2).
*--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/MATPRF INDEX 1 INTO DATA(WA_/SAPAPO/MATPRF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/MATPRF>-GRPRT = 1.
</SAPAPO/MATPRF>-GIPRT = 1.
</SAPAPO/MATPRF>-PLIFZ = 1.
</SAPAPO/MATPRF>-LGRAD = 1.
</SAPAPO/MATPRF>-SCOST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/MATPRF-BESKZ, sy-vline,
  WA_/SAPAPO/MATPRF-LSZID, sy-vline,
  WA_/SAPAPO/MATPRF-DPRID, sy-vline,
  WA_/SAPAPO/MATPRF-SPRID, sy-vline,
  WA_/SAPAPO/MATPRF-DPLID, sy-vline,
  WA_/SAPAPO/MATPRF-MATSTORE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/MATPRF 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/MATPRF 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/MATPRF INTO WA_/SAPAPO/MATPRF.


*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 TSTRG, internal->external for field GRPRT
CALL FUNCTION 'CONVERSION_EXIT_TSTRG_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MATPRF-GRPRT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MATPRF-GRPRT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRG, internal->external for field GIPRT
CALL FUNCTION 'CONVERSION_EXIT_TSTRG_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MATPRF-GIPRT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MATPRF-GIPRT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit DPLID, internal->external for field DPLID
CALL FUNCTION 'CONVERSION_EXIT_DPLID_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MATPRF-DPLID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MATPRF-DPLID.
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/MATPRF_STR, 
GRPRT TYPE STRING,
GIPRT TYPE STRING,
PLIFZ TYPE STRING,
LGRAD TYPE STRING,
SCOST TYPE STRING,
BESKZ TYPE STRING,
LSZID TYPE STRING,
DPRID TYPE STRING,
SPRID TYPE STRING,
DPLID TYPE STRING,
MATSTORE TYPE STRING,
SAFTY TYPE STRING,
STOCK_UID TYPE STRING,
SW_SCZPRF TYPE STRING,
RQMID TYPE STRING,
SAFTYC_MAX TYPE STRING,
SAFTYC_MIN TYPE STRING,
RELDT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/MATPRF_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/MATPRF_STR-GRPRT sy-vline 
WA_/SAPAPO/MATPRF_STR-GIPRT sy-vline 
WA_/SAPAPO/MATPRF_STR-PLIFZ sy-vline 
WA_/SAPAPO/MATPRF_STR-LGRAD sy-vline 
WA_/SAPAPO/MATPRF_STR-SCOST sy-vline 
WA_/SAPAPO/MATPRF_STR-BESKZ sy-vline 
WA_/SAPAPO/MATPRF_STR-LSZID sy-vline 
WA_/SAPAPO/MATPRF_STR-DPRID sy-vline 
WA_/SAPAPO/MATPRF_STR-SPRID sy-vline 
WA_/SAPAPO/MATPRF_STR-DPLID sy-vline 
WA_/SAPAPO/MATPRF_STR-MATSTORE sy-vline 
WA_/SAPAPO/MATPRF_STR-SAFTY sy-vline 
WA_/SAPAPO/MATPRF_STR-STOCK_UID sy-vline 
WA_/SAPAPO/MATPRF_STR-SW_SCZPRF sy-vline 
WA_/SAPAPO/MATPRF_STR-RQMID sy-vline 
WA_/SAPAPO/MATPRF_STR-SAFTYC_MAX sy-vline 
WA_/SAPAPO/MATPRF_STR-SAFTYC_MIN sy-vline 
WA_/SAPAPO/MATPRF_STR-RELDT sy-vline      INTO ld_text SEPARATED BY SPACE.

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