ABAP Select data from SAP table GMG_DI_EXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GMG_DI_EXT
*  INTO TABLE @DATA(IT_GMG_DI_EXT2).
*--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_GMG_DI_EXT INDEX 1 INTO DATA(WA_GMG_DI_EXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GMG_DI_EXT>-ORG_INDEX = 1.
<GMG_DI_EXT>-AKTYP = 1.
<GMG_DI_EXT>-RLTP1 = 1.
<GMG_DI_EXT>-RLTP2 = 1.
<GMG_DI_EXT>-RLTP3 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GMG_DI_EXT-RLTP4, sy-vline,
  WA_GMG_DI_EXT-RLTP5, sy-vline,
  WA_GMG_DI_EXT-RLTP6, sy-vline,
  WA_GMG_DI_EXT-RLTP7, sy-vline,
  WA_GMG_DI_EXT-RLTP8, sy-vline,
  WA_GMG_DI_EXT-RLTP9, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GMG_DI_EXT 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_GMG_DI_EXT 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_GMG_DI_EXT INTO WA_GMG_DI_EXT.


*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 GRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GMG_DI_EXT-GRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GMG_DI_EXT-GRANT_NBR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field SPONSOR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GMG_DI_EXT-SPONSOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GMG_DI_EXT-SPONSOR.
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_GMG_DI_EXT_STR, 
ORG_INDEX TYPE STRING,
AKTYP TYPE STRING,
RLTP1 TYPE STRING,
RLTP2 TYPE STRING,
RLTP3 TYPE STRING,
RLTP4 TYPE STRING,
RLTP5 TYPE STRING,
RLTP6 TYPE STRING,
RLTP7 TYPE STRING,
RLTP8 TYPE STRING,
RLTP9 TYPE STRING,
GRANT_NBR TYPE STRING,
GRANT_TYPE TYPE STRING,
COPY_SOURCE TYPE STRING,
SPONSOR TYPE STRING,
CHIND_RESP TYPE STRING,
RESPONSIBILITY TYPE STRING,
OBJECT_TYPE TYPE STRING,
OBJECT_ID TYPE STRING,
FROM_DATE TYPE STRING,
TO_DATE TYPE STRING,
CHIND_FUND TYPE STRING,
FM_AREA TYPE STRING,
FUND TYPE STRING,
CHIND_PROGRAM TYPE STRING,
SPONSORED_PROG TYPE STRING,
CHIND_CLASS TYPE STRING,
SPONSORED_CLASS TYPE STRING,
IDC_RELEVANT TYPE STRING,
CHIND_OBJ TYPE STRING,
SPONSORED_PROG5 TYPE STRING,
SPONSORED_CLASS5 TYPE STRING,
FM_AREA5 TYPE STRING,
FUND5 TYPE STRING,
FINANCING_OBJECT TYPE STRING,
PLAN_ALLOWED TYPE STRING,
BUDGET_ALLOWED TYPE STRING,
ACTUALS_ALLOWED TYPE STRING,
GRANT_DESC TYPE STRING,
GRANT_SHORT_DESC TYPE STRING,
AWARD_TYPE TYPE STRING,
AWARD_START TYPE STRING,
AWARD_END TYPE STRING,
FINAL_BILL_DATE TYPE STRING,
LETTER_OF_CREDIT TYPE STRING,
BLOCKING_IND TYPE STRING,
SPLIT_OF_YEARS TYPE STRING,
GRANT_FY_VARIANT TYPE STRING,
GRANT_CURRENCY TYPE STRING,
GRANT_TOTAL TYPE STRING,
EXCHANGE_RATE TYPE STRING,
EXCHANGE_DATE TYPE STRING,
FROM_FACTOR TYPE STRING,
TO_FACTOR TYPE STRING,
CFDA TYPE STRING,
FUNDING_ORIGIN TYPE STRING,
SALESORG TYPE STRING,
DISTR_CHAN TYPE STRING,
DIVISION TYPE STRING,
BILLING_RULE TYPE STRING,
INSTALLMENT_AMT TYPE STRING,
MILESTONE_TOTAL TYPE STRING,
IDC_RULE TYPE STRING,
IDC_CAP TYPE STRING,
IDC_ACCUMULATED TYPE STRING,
CS_RULE TYPE STRING,
LIFECYCLE_STATUS TYPE STRING,
USER_STATUS TYPE STRING,
AUTHGR TYPE STRING,
XDELE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GMG_DI_EXT_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_GMG_DI_EXT_STR-ORG_INDEX sy-vline 
WA_GMG_DI_EXT_STR-AKTYP sy-vline 
WA_GMG_DI_EXT_STR-RLTP1 sy-vline 
WA_GMG_DI_EXT_STR-RLTP2 sy-vline 
WA_GMG_DI_EXT_STR-RLTP3 sy-vline 
WA_GMG_DI_EXT_STR-RLTP4 sy-vline 
WA_GMG_DI_EXT_STR-RLTP5 sy-vline 
WA_GMG_DI_EXT_STR-RLTP6 sy-vline 
WA_GMG_DI_EXT_STR-RLTP7 sy-vline 
WA_GMG_DI_EXT_STR-RLTP8 sy-vline 
WA_GMG_DI_EXT_STR-RLTP9 sy-vline 
WA_GMG_DI_EXT_STR-GRANT_NBR sy-vline 
WA_GMG_DI_EXT_STR-GRANT_TYPE sy-vline 
WA_GMG_DI_EXT_STR-COPY_SOURCE sy-vline 
WA_GMG_DI_EXT_STR-SPONSOR sy-vline 
WA_GMG_DI_EXT_STR-CHIND_RESP sy-vline 
WA_GMG_DI_EXT_STR-RESPONSIBILITY sy-vline 
WA_GMG_DI_EXT_STR-OBJECT_TYPE sy-vline 
WA_GMG_DI_EXT_STR-OBJECT_ID sy-vline 
WA_GMG_DI_EXT_STR-FROM_DATE sy-vline 
WA_GMG_DI_EXT_STR-TO_DATE sy-vline 
WA_GMG_DI_EXT_STR-CHIND_FUND sy-vline 
WA_GMG_DI_EXT_STR-FM_AREA sy-vline 
WA_GMG_DI_EXT_STR-FUND sy-vline 
WA_GMG_DI_EXT_STR-CHIND_PROGRAM sy-vline 
WA_GMG_DI_EXT_STR-SPONSORED_PROG sy-vline 
WA_GMG_DI_EXT_STR-CHIND_CLASS sy-vline 
WA_GMG_DI_EXT_STR-SPONSORED_CLASS sy-vline 
WA_GMG_DI_EXT_STR-IDC_RELEVANT sy-vline 
WA_GMG_DI_EXT_STR-CHIND_OBJ sy-vline 
WA_GMG_DI_EXT_STR-SPONSORED_PROG5 sy-vline 
WA_GMG_DI_EXT_STR-SPONSORED_CLASS5 sy-vline 
WA_GMG_DI_EXT_STR-FM_AREA5 sy-vline 
WA_GMG_DI_EXT_STR-FUND5 sy-vline 
WA_GMG_DI_EXT_STR-FINANCING_OBJECT sy-vline 
WA_GMG_DI_EXT_STR-PLAN_ALLOWED sy-vline 
WA_GMG_DI_EXT_STR-BUDGET_ALLOWED sy-vline 
WA_GMG_DI_EXT_STR-ACTUALS_ALLOWED sy-vline 
WA_GMG_DI_EXT_STR-GRANT_DESC sy-vline 
WA_GMG_DI_EXT_STR-GRANT_SHORT_DESC sy-vline 
WA_GMG_DI_EXT_STR-AWARD_TYPE sy-vline 
WA_GMG_DI_EXT_STR-AWARD_START sy-vline 
WA_GMG_DI_EXT_STR-AWARD_END sy-vline 
WA_GMG_DI_EXT_STR-FINAL_BILL_DATE sy-vline 
WA_GMG_DI_EXT_STR-LETTER_OF_CREDIT sy-vline 
WA_GMG_DI_EXT_STR-BLOCKING_IND sy-vline 
WA_GMG_DI_EXT_STR-SPLIT_OF_YEARS sy-vline 
WA_GMG_DI_EXT_STR-GRANT_FY_VARIANT sy-vline 
WA_GMG_DI_EXT_STR-GRANT_CURRENCY sy-vline 
WA_GMG_DI_EXT_STR-GRANT_TOTAL sy-vline 
WA_GMG_DI_EXT_STR-EXCHANGE_RATE sy-vline 
WA_GMG_DI_EXT_STR-EXCHANGE_DATE sy-vline 
WA_GMG_DI_EXT_STR-FROM_FACTOR sy-vline 
WA_GMG_DI_EXT_STR-TO_FACTOR sy-vline 
WA_GMG_DI_EXT_STR-CFDA sy-vline 
WA_GMG_DI_EXT_STR-FUNDING_ORIGIN sy-vline 
WA_GMG_DI_EXT_STR-SALESORG sy-vline 
WA_GMG_DI_EXT_STR-DISTR_CHAN sy-vline 
WA_GMG_DI_EXT_STR-DIVISION sy-vline 
WA_GMG_DI_EXT_STR-BILLING_RULE sy-vline 
WA_GMG_DI_EXT_STR-INSTALLMENT_AMT sy-vline 
WA_GMG_DI_EXT_STR-MILESTONE_TOTAL sy-vline 
WA_GMG_DI_EXT_STR-IDC_RULE sy-vline 
WA_GMG_DI_EXT_STR-IDC_CAP sy-vline 
WA_GMG_DI_EXT_STR-IDC_ACCUMULATED sy-vline 
WA_GMG_DI_EXT_STR-CS_RULE sy-vline 
WA_GMG_DI_EXT_STR-LIFECYCLE_STATUS sy-vline 
WA_GMG_DI_EXT_STR-USER_STATUS sy-vline 
WA_GMG_DI_EXT_STR-AUTHGR sy-vline 
WA_GMG_DI_EXT_STR-XDELE sy-vline      INTO ld_text SEPARATED BY SPACE.

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