ABAP Select data from SAP table V_T77WWW_GAMLC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_T77WWW_GAMLC 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_T77WWW_GAMLC. 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_T77WWW_GAMLC 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_T77WWW_GAMLC TYPE STANDARD TABLE OF V_T77WWW_GAMLC,
      WA_V_T77WWW_GAMLC TYPE V_T77WWW_GAMLC,
      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_T77WWW_GAMLC> TYPE V_T77WWW_GAMLC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_T77WWW_GAMLC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_T77WWW_GAMLC
  INTO TABLE IT_V_T77WWW_GAMLC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_T77WWW_GAMLC
*  INTO TABLE @DATA(IT_V_T77WWW_GAMLC2).
*--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_T77WWW_GAMLC INDEX 1 INTO DATA(WA_V_T77WWW_GAMLC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_T77WWW_GAMLC ASSIGNING <V_T77WWW_GAMLC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_T77WWW_GAMLC>-MANDT = 1.
<V_T77WWW_GAMLC>-APPNO = 1.
<V_T77WWW_GAMLC>-GATYP = 1.
<V_T77WWW_GAMLC>-TSR01 = 1.
<V_T77WWW_GAMLC>-TSR02 = 1.

ENDLOOP.

LOOP AT IT_V_T77WWW_GAMLC INTO WA_V_T77WWW_GAMLC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_T77WWW_GAMLC-CSFLD, sy-vline,
  WA_V_T77WWW_GAMLC-ENDDA, sy-vline,
  WA_V_T77WWW_GAMLC-BEGDA, sy-vline,
  WA_V_T77WWW_GAMLC-MNDTR, sy-vline,
  WA_V_T77WWW_GAMLC-FLDVT, sy-vline,
  WA_V_T77WWW_GAMLC-WIDTH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_T77WWW_GAMLC 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_T77WWW_GAMLC 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_T77WWW_GAMLC INTO WA_V_T77WWW_GAMLC.


*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_T77WWW_GAMLC_STR, 
MANDT TYPE STRING,
APPNO TYPE STRING,
GATYP TYPE STRING,
TSR01 TYPE STRING,
TSR02 TYPE STRING,
CSFLD TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
MNDTR TYPE STRING,
FLDVT TYPE STRING,
WIDTH TYPE STRING,
IVEMP TYPE STRING,
IEEMP TYPE STRING,
ROEMP TYPE STRING,
IVAPP TYPE STRING,
IEAPP TYPE STRING,
ROAPP TYPE STRING,
FLDOR TYPE STRING,
FEACT TYPE STRING,
DFVAL TYPE STRING,
FMTFV TYPE STRING,
CFLBL TYPE STRING,
TLTIP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_T77WWW_GAMLC_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_T77WWW_GAMLC_STR-MANDT sy-vline 
WA_V_T77WWW_GAMLC_STR-APPNO sy-vline 
WA_V_T77WWW_GAMLC_STR-GATYP sy-vline 
WA_V_T77WWW_GAMLC_STR-TSR01 sy-vline 
WA_V_T77WWW_GAMLC_STR-TSR02 sy-vline 
WA_V_T77WWW_GAMLC_STR-CSFLD sy-vline 
WA_V_T77WWW_GAMLC_STR-ENDDA sy-vline 
WA_V_T77WWW_GAMLC_STR-BEGDA sy-vline 
WA_V_T77WWW_GAMLC_STR-MNDTR sy-vline 
WA_V_T77WWW_GAMLC_STR-FLDVT sy-vline 
WA_V_T77WWW_GAMLC_STR-WIDTH sy-vline 
WA_V_T77WWW_GAMLC_STR-IVEMP sy-vline 
WA_V_T77WWW_GAMLC_STR-IEEMP sy-vline 
WA_V_T77WWW_GAMLC_STR-ROEMP sy-vline 
WA_V_T77WWW_GAMLC_STR-IVAPP sy-vline 
WA_V_T77WWW_GAMLC_STR-IEAPP sy-vline 
WA_V_T77WWW_GAMLC_STR-ROAPP sy-vline 
WA_V_T77WWW_GAMLC_STR-FLDOR sy-vline 
WA_V_T77WWW_GAMLC_STR-FEACT sy-vline 
WA_V_T77WWW_GAMLC_STR-DFVAL sy-vline 
WA_V_T77WWW_GAMLC_STR-FMTFV sy-vline 
WA_V_T77WWW_GAMLC_STR-CFLBL sy-vline 
WA_V_T77WWW_GAMLC_STR-TLTIP sy-vline      INTO ld_text SEPARATED BY SPACE.

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