ABAP Select data from SAP table V_T77GD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_T77GD 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 V_T77GD. 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 V_T77GD 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_V_T77GD TYPE STANDARD TABLE OF V_T77GD,
      WA_V_T77GD TYPE V_T77GD,
      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: <V_T77GD> TYPE V_T77GD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_T77GD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_T77GD
  INTO TABLE IT_V_T77GD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_T77GD
*  INTO TABLE @DATA(IT_V_T77GD2).
*--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_V_T77GD INDEX 1 INTO DATA(WA_V_T77GD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_T77GD ASSIGNING <V_T77GD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_T77GD>-MANDT = 1.
<V_T77GD>-DISPLAYID = 1.
<V_T77GD>-OTYPE = 1.
<V_T77GD>-OTEXTID = 1.
<V_T77GD>-ORDERDET = 1.

ENDLOOP.

LOOP AT IT_V_T77GD INTO WA_V_T77GD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_T77GD-ORDEROVW, sy-vline,
  WA_V_T77GD-ORDERWIN, sy-vline,
  WA_V_T77GD-IDENTIFDET, sy-vline,
  WA_V_T77GD-IDENTIFOVW, sy-vline,
  WA_V_T77GD-IDENTIFWIN, sy-vline,
  WA_V_T77GD-LINEWRPDET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_T77GD 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_V_T77GD 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_V_T77GD INTO WA_V_T77GD.


*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_V_T77GD_STR, 
MANDT TYPE STRING,
DISPLAYID TYPE STRING,
OTYPE TYPE STRING,
OTEXTID TYPE STRING,
ORDERDET TYPE STRING,
ORDEROVW TYPE STRING,
ORDERWIN TYPE STRING,
IDENTIFDET TYPE STRING,
IDENTIFOVW TYPE STRING,
IDENTIFWIN TYPE STRING,
LINEWRPDET TYPE STRING,
LINEWRPOVW TYPE STRING,
LINEWRPWIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_T77GD_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_V_T77GD_STR-MANDT sy-vline 
WA_V_T77GD_STR-DISPLAYID sy-vline 
WA_V_T77GD_STR-OTYPE sy-vline 
WA_V_T77GD_STR-OTEXTID sy-vline 
WA_V_T77GD_STR-ORDERDET sy-vline 
WA_V_T77GD_STR-ORDEROVW sy-vline 
WA_V_T77GD_STR-ORDERWIN sy-vline 
WA_V_T77GD_STR-IDENTIFDET sy-vline 
WA_V_T77GD_STR-IDENTIFOVW sy-vline 
WA_V_T77GD_STR-IDENTIFWIN sy-vline 
WA_V_T77GD_STR-LINEWRPDET sy-vline 
WA_V_T77GD_STR-LINEWRPOVW sy-vline 
WA_V_T77GD_STR-LINEWRPWIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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