ABAP Select data from SAP table T77WWW_GACCHR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T77WWW_GACCHR 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 T77WWW_GACCHR. 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 T77WWW_GACCHR 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_T77WWW_GACCHR TYPE STANDARD TABLE OF T77WWW_GACCHR,
      WA_T77WWW_GACCHR TYPE T77WWW_GACCHR,
      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: <T77WWW_GACCHR> TYPE T77WWW_GACCHR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T77WWW_GACCHR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T77WWW_GACCHR
  INTO TABLE IT_T77WWW_GACCHR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T77WWW_GACCHR
*  INTO TABLE @DATA(IT_T77WWW_GACCHR2).
*--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_T77WWW_GACCHR INDEX 1 INTO DATA(WA_T77WWW_GACCHR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T77WWW_GACCHR ASSIGNING <T77WWW_GACCHR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T77WWW_GACCHR>-MANDT = 1.
<T77WWW_GACCHR>-APPNO = 1.
<T77WWW_GACCHR>-GATYP = 1.
<T77WWW_GACCHR>-TSR01 = 1.
<T77WWW_GACCHR>-TSR02 = 1.

ENDLOOP.

LOOP AT IT_T77WWW_GACCHR INTO WA_T77WWW_GACCHR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T77WWW_GACCHR-ENDDA, sy-vline,
  WA_T77WWW_GACCHR-BEGDA, sy-vline,
  WA_T77WWW_GACCHR-PMTMD, sy-vline,
  WA_T77WWW_GACCHR-ALDEP, sy-vline,
  WA_T77WWW_GACCHR-DEPLV, sy-vline,
  WA_T77WWW_GACCHR-DFAMT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T77WWW_GACCHR 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_T77WWW_GACCHR 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_T77WWW_GACCHR INTO WA_T77WWW_GACCHR.


*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_T77WWW_GACCHR_STR, 
MANDT TYPE STRING,
APPNO TYPE STRING,
GATYP TYPE STRING,
TSR01 TYPE STRING,
TSR02 TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
PMTMD TYPE STRING,
ALDEP TYPE STRING,
DEPLV TYPE STRING,
DFAMT TYPE STRING,
UHLCF TYPE STRING,
UMLCF TYPE STRING,
UMLAF TYPE STRING,
ALDCL TYPE STRING,
ALATM TYPE STRING,
PETYP TYPE STRING,
PEFRQ TYPE STRING,
FIXML TYPE STRING,
ALCRT TYPE STRING,
ALEDT TYPE STRING,
ALDEL TYPE STRING,
NOVRW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T77WWW_GACCHR_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_T77WWW_GACCHR_STR-MANDT sy-vline 
WA_T77WWW_GACCHR_STR-APPNO sy-vline 
WA_T77WWW_GACCHR_STR-GATYP sy-vline 
WA_T77WWW_GACCHR_STR-TSR01 sy-vline 
WA_T77WWW_GACCHR_STR-TSR02 sy-vline 
WA_T77WWW_GACCHR_STR-ENDDA sy-vline 
WA_T77WWW_GACCHR_STR-BEGDA sy-vline 
WA_T77WWW_GACCHR_STR-PMTMD sy-vline 
WA_T77WWW_GACCHR_STR-ALDEP sy-vline 
WA_T77WWW_GACCHR_STR-DEPLV sy-vline 
WA_T77WWW_GACCHR_STR-DFAMT sy-vline 
WA_T77WWW_GACCHR_STR-UHLCF sy-vline 
WA_T77WWW_GACCHR_STR-UMLCF sy-vline 
WA_T77WWW_GACCHR_STR-UMLAF sy-vline 
WA_T77WWW_GACCHR_STR-ALDCL sy-vline 
WA_T77WWW_GACCHR_STR-ALATM sy-vline 
WA_T77WWW_GACCHR_STR-PETYP sy-vline 
WA_T77WWW_GACCHR_STR-PEFRQ sy-vline 
WA_T77WWW_GACCHR_STR-FIXML sy-vline 
WA_T77WWW_GACCHR_STR-ALCRT sy-vline 
WA_T77WWW_GACCHR_STR-ALEDT sy-vline 
WA_T77WWW_GACCHR_STR-ALDEL sy-vline 
WA_T77WWW_GACCHR_STR-NOVRW sy-vline      INTO ld_text SEPARATED BY SPACE.

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