ABAP Select data from SAP table P77SX into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P77SX 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 P77SX. 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 P77SX 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_P77SX TYPE STANDARD TABLE OF P77SX,
      WA_P77SX TYPE P77SX,
      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: <P77SX> TYPE P77SX.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P77SX.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P77SX
  INTO TABLE IT_P77SX.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P77SX
*  INTO TABLE @DATA(IT_P77SX2).
*--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_P77SX INDEX 1 INTO DATA(WA_P77SX2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P77SX ASSIGNING <P77SX>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P77SX>-PAGENO = 1.
<P77SX>-TOTAL = 1.
<P77SX>-CLUID = 1.
<P77SX>-RCODE = 1.
<P77SX>-M77S1 = 1.

ENDLOOP.

LOOP AT IT_P77SX INTO WA_P77SX.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P77SX-M77S2, sy-vline,
  WA_P77SX-M77S3, sy-vline,
  WA_P77SX-M77S4, sy-vline,
  WA_P77SX-M77S5, sy-vline,
  WA_P77SX-T0500, sy-vline,
  WA_P77SX-SERVC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P77SX 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_P77SX 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_P77SX INTO WA_P77SX.


*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_P77SX_STR, 
PAGENO TYPE STRING,
TOTAL TYPE STRING,
CLUID TYPE STRING,
RCODE TYPE STRING,
M77S1 TYPE STRING,
M77S2 TYPE STRING,
M77S3 TYPE STRING,
M77S4 TYPE STRING,
M77S5 TYPE STRING,
T0500 TYPE STRING,
SERVC TYPE STRING,
DYMOD TYPE STRING,
MENUE TYPE STRING,
MLEVL TYPE STRING,
FROMFLD TYPE STRING,
TOFLD TYPE STRING,
CLUID1 TYPE STRING,
RCODE1 TYPE STRING,
SERVC1 TYPE STRING,
DYMOD1 TYPE STRING,
MENUE1 TYPE STRING,
MLEVL1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P77SX_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_P77SX_STR-PAGENO sy-vline 
WA_P77SX_STR-TOTAL sy-vline 
WA_P77SX_STR-CLUID sy-vline 
WA_P77SX_STR-RCODE sy-vline 
WA_P77SX_STR-M77S1 sy-vline 
WA_P77SX_STR-M77S2 sy-vline 
WA_P77SX_STR-M77S3 sy-vline 
WA_P77SX_STR-M77S4 sy-vline 
WA_P77SX_STR-M77S5 sy-vline 
WA_P77SX_STR-T0500 sy-vline 
WA_P77SX_STR-SERVC sy-vline 
WA_P77SX_STR-DYMOD sy-vline 
WA_P77SX_STR-MENUE sy-vline 
WA_P77SX_STR-MLEVL sy-vline 
WA_P77SX_STR-FROMFLD sy-vline 
WA_P77SX_STR-TOFLD sy-vline 
WA_P77SX_STR-CLUID1 sy-vline 
WA_P77SX_STR-RCODE1 sy-vline 
WA_P77SX_STR-SERVC1 sy-vline 
WA_P77SX_STR-DYMOD1 sy-vline 
WA_P77SX_STR-MENUE1 sy-vline 
WA_P77SX_STR-MLEVL1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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