ABAP Select data from SAP table MMPUR_CAT_ITM_HUB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MMPUR_CAT_ITM_HUB 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_CAT_ITM_HUB. 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_CAT_ITM_HUB 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_CAT_ITM_HUB TYPE STANDARD TABLE OF MMPUR_CAT_ITM_HUB,
      WA_MMPUR_CAT_ITM_HUB TYPE MMPUR_CAT_ITM_HUB,
      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_CAT_ITM_HUB> TYPE MMPUR_CAT_ITM_HUB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_CAT_ITM_HUB
*  INTO TABLE @DATA(IT_MMPUR_CAT_ITM_HUB2).
*--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_CAT_ITM_HUB INDEX 1 INTO DATA(WA_MMPUR_CAT_ITM_HUB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_CAT_ITM_HUB>-MATNR = 1.
<MMPUR_CAT_ITM_HUB>-CAT_ITM_KEY = 1.
<MMPUR_CAT_ITM_HUB>-CAT_ITM_HASH = 1.
<MMPUR_CAT_ITM_HUB>-PLANT = 1.
<MMPUR_CAT_ITM_HUB>-VENDOR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_CAT_ITM_HUB-VENDORNAME, sy-vline,
  WA_MMPUR_CAT_ITM_HUB-SOSUOM, sy-vline,
  WA_MMPUR_CAT_ITM_HUB-MATGROUP, sy-vline,
  WA_MMPUR_CAT_ITM_HUB-EKGRP, sy-vline,
  WA_MMPUR_CAT_ITM_HUB-EKORG, sy-vline,
  WA_MMPUR_CAT_ITM_HUB-NETPR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_CAT_ITM_HUB 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_CAT_ITM_HUB 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_CAT_ITM_HUB INTO WA_MMPUR_CAT_ITM_HUB.


*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 ISOLA, internal->external for field LANGUAGEKEY
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_CAT_ITM_HUB-LANGUAGEKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_CAT_ITM_HUB-LANGUAGEKEY.
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_CAT_ITM_HUB_STR, 
MATNR TYPE STRING,
CAT_ITM_KEY TYPE STRING,
CAT_ITM_HASH TYPE STRING,
PLANT TYPE STRING,
VENDOR TYPE STRING,
VENDORNAME TYPE STRING,
SOSUOM TYPE STRING,
MATGROUP TYPE STRING,
EKGRP TYPE STRING,
EKORG TYPE STRING,
NETPR TYPE STRING,
PRICEUNIT TYPE STRING,
ORDERUNIT TYPE STRING,
SOSNUM TYPE STRING,
SOSITEMNUM TYPE STRING,
CURRENCY TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
DELETIONIND TYPE STRING,
LANGUAGEKEY TYPE STRING,
SOSTYPE TYPE STRING,
MATDESC TYPE STRING,
ISVENDORFIXED TYPE STRING,
ISSOSFIXED TYPE STRING,
ISBLOCKED TYPE STRING,
ZEORD TYPE STRING,
PURBLOCK TYPE STRING,
PARTNUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_CAT_ITM_HUB_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_CAT_ITM_HUB_STR-MATNR sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-CAT_ITM_KEY sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-CAT_ITM_HASH sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-PLANT sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-VENDOR sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-VENDORNAME sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-SOSUOM sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-MATGROUP sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-EKGRP sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-EKORG sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-NETPR sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-PRICEUNIT sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-ORDERUNIT sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-SOSNUM sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-SOSITEMNUM sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-CURRENCY sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-VALIDFROM sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-VALIDTO sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-DELETIONIND sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-LANGUAGEKEY sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-SOSTYPE sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-MATDESC sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-ISVENDORFIXED sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-ISSOSFIXED sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-ISBLOCKED sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-ZEORD sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-PURBLOCK sy-vline 
WA_MMPUR_CAT_ITM_HUB_STR-PARTNUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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