ABAP Select data from SAP table PRODUCT_CATEGORY1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PRODUCT_CATEGORY1 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 PRODUCT_CATEGORY1. 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 PRODUCT_CATEGORY1 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_PRODUCT_CATEGORY1 TYPE STANDARD TABLE OF PRODUCT_CATEGORY1,
      WA_PRODUCT_CATEGORY1 TYPE PRODUCT_CATEGORY1,
      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: <PRODUCT_CATEGORY1> TYPE PRODUCT_CATEGORY1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PRODUCT_CATEGORY1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PRODUCT_CATEGORY1
  INTO TABLE IT_PRODUCT_CATEGORY1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PRODUCT_CATEGORY1
*  INTO TABLE @DATA(IT_PRODUCT_CATEGORY12).
*--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_PRODUCT_CATEGORY1 INDEX 1 INTO DATA(WA_PRODUCT_CATEGORY12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PRODUCT_CATEGORY1 ASSIGNING <PRODUCT_CATEGORY1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PRODUCT_CATEGORY1>-CONTROLLER = 1.
<PRODUCT_CATEGORY1>-CATEGORY_ID = 1.
<PRODUCT_CATEGORY1>-PARENT_CATEGORY_ID = 1.
<PRODUCT_CATEGORY1>-HIERARCHY_ID = 1.
<PRODUCT_CATEGORY1>-ADMINISTRATION = 1.

ENDLOOP.

LOOP AT IT_PRODUCT_CATEGORY1 INTO WA_PRODUCT_CATEGORY1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PRODUCT_CATEGORY1-CONTROLLER, sy-vline,
  WA_PRODUCT_CATEGORY1-LOGICAL_SYSTEM_ID, sy-vline,
  WA_PRODUCT_CATEGORY1-VALID_FROM_DATE_TIME, sy-vline,
  WA_PRODUCT_CATEGORY1-VALID_TO_DATE_TIME, sy-vline,
  WA_PRODUCT_CATEGORY1-USER_ID, sy-vline,
  WA_PRODUCT_CATEGORY1-ACTION_CODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PRODUCT_CATEGORY1 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_PRODUCT_CATEGORY1 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_PRODUCT_CATEGORY1 INTO WA_PRODUCT_CATEGORY1.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PRODUCT_CATEGORY1_STR, 
CONTROLLER TYPE STRING,
CATEGORY_ID TYPE STRING,
PARENT_CATEGORY_ID TYPE STRING,
HIERARCHY_ID TYPE STRING,
ADMINISTRATION TYPE STRING,
CONTROLLER TYPE STRING,
LOGICAL_SYSTEM_ID TYPE STRING,
VALID_FROM_DATE_TIME TYPE STRING,
VALID_TO_DATE_TIME TYPE STRING,
USER_ID TYPE STRING,
ACTION_CODE TYPE STRING,
DESCRIPTION TYPE STRING,
ALTERNATIVE_IDTYPE_CODE TYPE STRING,
AUTHORIZATION_GROUP_CODE TYPE STRING,
CHANGE_MANAGEMENT_INDICATOR TYPE STRING,
COMPETITOR_PRODUCT_INDICATOR TYPE STRING,
NO_PRICE_CONDITION_INDICATOR TYPE STRING,
NO_PRODUCT_ASSIGMENT_INDICATOR TYPE STRING,
NO_DOCUMENT_INDICATOR TYPE STRING,
PRODUCT_TYPE_CODE TYPE STRING,
OBJECT_FAMILY_CODE TYPE STRING,
PARTNER_SCHEME_CODE TYPE STRING,
PRODUCT_TEMPLATE TYPE STRING,
CONTROLLER TYPE STRING,
PRODUCT_ID TYPE STRING,
PRODUCT_TYPE_CODE TYPE STRING,
OBJECT_FAMILY_CODE TYPE STRING,
PRODUCT_LOGICAL_SYSTEM_ID TYPE STRING,
RESPONSIBLE_PERSON_ID TYPE STRING,
SET_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PRODUCT_CATEGORY1_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_PRODUCT_CATEGORY1_STR-CONTROLLER sy-vline 
WA_PRODUCT_CATEGORY1_STR-CATEGORY_ID sy-vline 
WA_PRODUCT_CATEGORY1_STR-PARENT_CATEGORY_ID sy-vline 
WA_PRODUCT_CATEGORY1_STR-HIERARCHY_ID sy-vline 
WA_PRODUCT_CATEGORY1_STR-ADMINISTRATION sy-vline 
WA_PRODUCT_CATEGORY1_STR-CONTROLLER sy-vline 
WA_PRODUCT_CATEGORY1_STR-LOGICAL_SYSTEM_ID sy-vline 
WA_PRODUCT_CATEGORY1_STR-VALID_FROM_DATE_TIME sy-vline 
WA_PRODUCT_CATEGORY1_STR-VALID_TO_DATE_TIME sy-vline 
WA_PRODUCT_CATEGORY1_STR-USER_ID sy-vline 
WA_PRODUCT_CATEGORY1_STR-ACTION_CODE sy-vline 
WA_PRODUCT_CATEGORY1_STR-DESCRIPTION sy-vline 
WA_PRODUCT_CATEGORY1_STR-ALTERNATIVE_IDTYPE_CODE sy-vline 
WA_PRODUCT_CATEGORY1_STR-AUTHORIZATION_GROUP_CODE sy-vline 
WA_PRODUCT_CATEGORY1_STR-CHANGE_MANAGEMENT_INDICATOR sy-vline 
WA_PRODUCT_CATEGORY1_STR-COMPETITOR_PRODUCT_INDICATOR sy-vline 
WA_PRODUCT_CATEGORY1_STR-NO_PRICE_CONDITION_INDICATOR sy-vline 
WA_PRODUCT_CATEGORY1_STR-NO_PRODUCT_ASSIGMENT_INDICATOR sy-vline 
WA_PRODUCT_CATEGORY1_STR-NO_DOCUMENT_INDICATOR sy-vline 
WA_PRODUCT_CATEGORY1_STR-PRODUCT_TYPE_CODE sy-vline 
WA_PRODUCT_CATEGORY1_STR-OBJECT_FAMILY_CODE sy-vline 
WA_PRODUCT_CATEGORY1_STR-PARTNER_SCHEME_CODE sy-vline 
WA_PRODUCT_CATEGORY1_STR-PRODUCT_TEMPLATE sy-vline 
WA_PRODUCT_CATEGORY1_STR-CONTROLLER sy-vline 
WA_PRODUCT_CATEGORY1_STR-PRODUCT_ID sy-vline 
WA_PRODUCT_CATEGORY1_STR-PRODUCT_TYPE_CODE sy-vline 
WA_PRODUCT_CATEGORY1_STR-OBJECT_FAMILY_CODE sy-vline 
WA_PRODUCT_CATEGORY1_STR-PRODUCT_LOGICAL_SYSTEM_ID sy-vline 
WA_PRODUCT_CATEGORY1_STR-RESPONSIBLE_PERSON_ID sy-vline 
WA_PRODUCT_CATEGORY1_STR-SET_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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