ABAP Select data from SAP table T7GR2PRM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T7GR2PRM 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 T7GR2PRM. 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 T7GR2PRM 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_T7GR2PRM TYPE STANDARD TABLE OF T7GR2PRM,
      WA_T7GR2PRM TYPE T7GR2PRM,
      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: <T7GR2PRM> TYPE T7GR2PRM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T7GR2PRM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T7GR2PRM
  INTO TABLE IT_T7GR2PRM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T7GR2PRM
*  INTO TABLE @DATA(IT_T7GR2PRM2).
*--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_T7GR2PRM INDEX 1 INTO DATA(WA_T7GR2PRM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T7GR2PRM ASSIGNING <T7GR2PRM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T7GR2PRM>-MANDT = 1.
<T7GR2PRM>-PCODE = 1.
<T7GR2PRM>-ENDDA = 1.
<T7GR2PRM>-BEGDA = 1.
<T7GR2PRM>-RETBN = 1.

ENDLOOP.

LOOP AT IT_T7GR2PRM INTO WA_T7GR2PRM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T7GR2PRM-SPLPR, sy-vline,
  WA_T7GR2PRM-CHJUP, sy-vline,
  WA_T7GR2PRM-SBSSE, sy-vline,
  WA_T7GR2PRM-SBCMP, sy-vline,
  WA_T7GR2PRM-VBACC, sy-vline,
  WA_T7GR2PRM-SOLCL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T7GR2PRM 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_T7GR2PRM 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_T7GR2PRM INTO WA_T7GR2PRM.


*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_T7GR2PRM_STR, 
MANDT TYPE STRING,
PCODE TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
RETBN TYPE STRING,
SPLPR TYPE STRING,
CHJUP TYPE STRING,
SBSSE TYPE STRING,
SBCMP TYPE STRING,
VBACC TYPE STRING,
SOLCL TYPE STRING,
VBPTF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T7GR2PRM_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_T7GR2PRM_STR-MANDT sy-vline 
WA_T7GR2PRM_STR-PCODE sy-vline 
WA_T7GR2PRM_STR-ENDDA sy-vline 
WA_T7GR2PRM_STR-BEGDA sy-vline 
WA_T7GR2PRM_STR-RETBN sy-vline 
WA_T7GR2PRM_STR-SPLPR sy-vline 
WA_T7GR2PRM_STR-CHJUP sy-vline 
WA_T7GR2PRM_STR-SBSSE sy-vline 
WA_T7GR2PRM_STR-SBCMP sy-vline 
WA_T7GR2PRM_STR-VBACC sy-vline 
WA_T7GR2PRM_STR-SOLCL sy-vline 
WA_T7GR2PRM_STR-VBPTF sy-vline      INTO ld_text SEPARATED BY SPACE.

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