ABAP Select data from SAP table MMPUR_S_CATALOGITEM_DETAIL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MMPUR_S_CATALOGITEM_DETAIL 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_S_CATALOGITEM_DETAIL. 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_S_CATALOGITEM_DETAIL 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_S_CATALOGITEM_DETAIL TYPE STANDARD TABLE OF MMPUR_S_CATALOGITEM_DETAIL,
      WA_MMPUR_S_CATALOGITEM_DETAIL TYPE MMPUR_S_CATALOGITEM_DETAIL,
      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_S_CATALOGITEM_DETAIL> TYPE MMPUR_S_CATALOGITEM_DETAIL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_S_CATALOGITEM_DETAIL
*  INTO TABLE @DATA(IT_MMPUR_S_CATALOGITEM_DETAIL2).
*--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_S_CATALOGITEM_DETAIL INDEX 1 INTO DATA(WA_MMPUR_S_CATALOGITEM_DETAIL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_S_CATALOGITEM_DETAIL>-OCI_CATALOG_ITEM = 1.
<MMPUR_S_CATALOGITEM_DETAIL>-LINE = 1.
<MMPUR_S_CATALOGITEM_DETAIL>-DESCRIPTION = 1.
<MMPUR_S_CATALOGITEM_DETAIL>-QUANTITY = 1.
<MMPUR_S_CATALOGITEM_DETAIL>-UNIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_S_CATALOGITEM_DETAIL-PRICE, sy-vline,
  WA_MMPUR_S_CATALOGITEM_DETAIL-PRICEUNIT, sy-vline,
  WA_MMPUR_S_CATALOGITEM_DETAIL-CURRENCY, sy-vline,
  WA_MMPUR_S_CATALOGITEM_DETAIL-MATNR, sy-vline,
  WA_MMPUR_S_CATALOGITEM_DETAIL-LEADTIME, sy-vline,
  WA_MMPUR_S_CATALOGITEM_DETAIL-VENDOR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_S_CATALOGITEM_DETAIL 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_S_CATALOGITEM_DETAIL 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_S_CATALOGITEM_DETAIL INTO WA_MMPUR_S_CATALOGITEM_DETAIL.


*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 PURCHINFREC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_S_CATALOGITEM_DETAIL-PURCHINFREC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_S_CATALOGITEM_DETAIL-PURCHINFREC.
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_S_CATALOGITEM_DETAIL_STR, 
OCI_CATALOG_ITEM TYPE STRING,
LINE TYPE STRING,
DESCRIPTION TYPE STRING,
QUANTITY TYPE STRING,
UNIT TYPE STRING,
PRICE TYPE STRING,
PRICEUNIT TYPE STRING,
CURRENCY TYPE STRING,
MATNR TYPE STRING,
LEADTIME TYPE STRING,
VENDOR TYPE STRING,
VENDORMAT TYPE STRING,
MANUFACTMAT TYPE STRING,
MANUFACTCODE TYPE STRING,
MATGROUP TYPE STRING,
SERVICE TYPE STRING,
CONTRACT TYPE STRING,
CONTRACT_ITEM TYPE STRING,
EXT_QUOTE_ID TYPE STRING,
EXT_QUOTE_ITEM TYPE STRING,
EXT_PRODUCT_ID TYPE STRING,
CUST_FIELD1 TYPE STRING,
CUST_FIELD2 TYPE STRING,
CUST_FIELD3 TYPE STRING,
CUST_FIELD4 TYPE STRING,
CUST_FIELD5 TYPE STRING,
ATTACHMENT TYPE STRING,
ATTACHMENT_TITLE TYPE STRING,
ATTACHMENT_PURPOSE TYPE STRING,
EXT_SCHEMA_TYPE TYPE STRING,
EXT_CATEGORY_ID TYPE STRING,
EXT_CATEGORY TYPE STRING,
SLD_SYS_NAME TYPE STRING,
PARENT_ID TYPE STRING,
ITEM_TYPE TYPE STRING,
SUSTAIN_OVERALL_RATING TYPE STRING,
SUSTAIN_RECYCLED_CONTENT TYPE STRING,
SUSTAIN_DIRECT_ENERGY TYPE STRING,
PURCHINFREC TYPE STRING,
PURCHORG TYPE STRING,
CATALOG_ITEM_ID TYPE STRING,
VENDOR_DESCR TYPE STRING,
SERVICE_ID TYPE STRING,
OCI_LONGTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_S_CATALOGITEM_DETAIL_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_S_CATALOGITEM_DETAIL_STR-OCI_CATALOG_ITEM sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-LINE sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-DESCRIPTION sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-QUANTITY sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-UNIT sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-PRICE sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-PRICEUNIT sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-CURRENCY sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-MATNR sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-LEADTIME sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-VENDOR sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-VENDORMAT sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-MANUFACTMAT sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-MANUFACTCODE sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-MATGROUP sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-SERVICE sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-CONTRACT sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-CONTRACT_ITEM sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-EXT_QUOTE_ID sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-EXT_QUOTE_ITEM sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-EXT_PRODUCT_ID sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-CUST_FIELD1 sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-CUST_FIELD2 sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-CUST_FIELD3 sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-CUST_FIELD4 sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-CUST_FIELD5 sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-ATTACHMENT sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-ATTACHMENT_TITLE sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-ATTACHMENT_PURPOSE sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-EXT_SCHEMA_TYPE sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-EXT_CATEGORY_ID sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-EXT_CATEGORY sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-SLD_SYS_NAME sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-PARENT_ID sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-ITEM_TYPE sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-SUSTAIN_OVERALL_RATING sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-SUSTAIN_RECYCLED_CONTENT sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-SUSTAIN_DIRECT_ENERGY sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-PURCHINFREC sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-PURCHORG sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-CATALOG_ITEM_ID sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-VENDOR_DESCR sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-SERVICE_ID sy-vline 
WA_MMPUR_S_CATALOGITEM_DETAIL_STR-OCI_LONGTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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