ABAP Select data from SAP table T7GR2TRG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T7GR2TRG 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 T7GR2TRG. 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 T7GR2TRG 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_T7GR2TRG TYPE STANDARD TABLE OF T7GR2TRG,
      WA_T7GR2TRG TYPE T7GR2TRG,
      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: <T7GR2TRG> TYPE T7GR2TRG.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T7GR2TRG.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T7GR2TRG
  INTO TABLE IT_T7GR2TRG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T7GR2TRG
*  INTO TABLE @DATA(IT_T7GR2TRG2).
*--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_T7GR2TRG INDEX 1 INTO DATA(WA_T7GR2TRG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T7GR2TRG ASSIGNING <T7GR2TRG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T7GR2TRG>-MANDT = 1.
<T7GR2TRG>-BUKRS = 1.
<T7GR2TRG>-LGART = 1.
<T7GR2TRG>-MONTP = 1.
<T7GR2TRG>-SEQNR = 1.

ENDLOOP.

LOOP AT IT_T7GR2TRG INTO WA_T7GR2TRG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T7GR2TRG-ENDDA, sy-vline,
  WA_T7GR2TRG-BEGDA, sy-vline,
  WA_T7GR2TRG-WTPEB, sy-vline,
  WA_T7GR2TRG-WTAEB, sy-vline,
  WA_T7GR2TRG-WTVEB, sy-vline,
  WA_T7GR2TRG-WTPCB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T7GR2TRG 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_T7GR2TRG 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_T7GR2TRG INTO WA_T7GR2TRG.


*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_T7GR2TRG_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
LGART TYPE STRING,
MONTP TYPE STRING,
SEQNR TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
WTPEB TYPE STRING,
WTAEB TYPE STRING,
WTVEB TYPE STRING,
WTPCB TYPE STRING,
WTACB TYPE STRING,
WTVCB TYPE STRING,
WTPLB TYPE STRING,
WTALB TYPE STRING,
WTPDC TYPE STRING,
WTADC TYPE STRING,
WAPEB TYPE STRING,
WAAEB TYPE STRING,
WAVEB TYPE STRING,
WAPCB TYPE STRING,
WAACB TYPE STRING,
WAVCB TYPE STRING,
WAPVB TYPE STRING,
WAAVB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T7GR2TRG_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_T7GR2TRG_STR-MANDT sy-vline 
WA_T7GR2TRG_STR-BUKRS sy-vline 
WA_T7GR2TRG_STR-LGART sy-vline 
WA_T7GR2TRG_STR-MONTP sy-vline 
WA_T7GR2TRG_STR-SEQNR sy-vline 
WA_T7GR2TRG_STR-ENDDA sy-vline 
WA_T7GR2TRG_STR-BEGDA sy-vline 
WA_T7GR2TRG_STR-WTPEB sy-vline 
WA_T7GR2TRG_STR-WTAEB sy-vline 
WA_T7GR2TRG_STR-WTVEB sy-vline 
WA_T7GR2TRG_STR-WTPCB sy-vline 
WA_T7GR2TRG_STR-WTACB sy-vline 
WA_T7GR2TRG_STR-WTVCB sy-vline 
WA_T7GR2TRG_STR-WTPLB sy-vline 
WA_T7GR2TRG_STR-WTALB sy-vline 
WA_T7GR2TRG_STR-WTPDC sy-vline 
WA_T7GR2TRG_STR-WTADC sy-vline 
WA_T7GR2TRG_STR-WAPEB sy-vline 
WA_T7GR2TRG_STR-WAAEB sy-vline 
WA_T7GR2TRG_STR-WAVEB sy-vline 
WA_T7GR2TRG_STR-WAPCB sy-vline 
WA_T7GR2TRG_STR-WAACB sy-vline 
WA_T7GR2TRG_STR-WAVCB sy-vline 
WA_T7GR2TRG_STR-WAPVB sy-vline 
WA_T7GR2TRG_STR-WAAVB sy-vline      INTO ld_text SEPARATED BY SPACE.

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