ABAP Select data from SAP table T77INT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T77INT 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 T77INT. 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 T77INT 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_T77INT TYPE STANDARD TABLE OF T77INT,
      WA_T77INT TYPE T77INT,
      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: <T77INT> TYPE T77INT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T77INT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T77INT
  INTO TABLE IT_T77INT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T77INT
*  INTO TABLE @DATA(IT_T77INT2).
*--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_T77INT INDEX 1 INTO DATA(WA_T77INT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T77INT ASSIGNING <T77INT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T77INT>-MANDT = 1.
<T77INT>-PERNR = 1.
<T77INT>-PLVAR = 1.
<T77INT>-ORGDAT = 1.
<T77INT>-MASSN = 1.

ENDLOOP.

LOOP AT IT_T77INT INTO WA_T77INT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T77INT-MASSG, sy-vline,
  WA_T77INT-AUTOUNDO, sy-vline,
  WA_T77INT-CHANGETYPE, sy-vline,
  WA_T77INT-POOLTYPE, sy-vline,
  WA_T77INT-COUNTRYCHANGE, sy-vline,
  WA_T77INT-OTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T77INT 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_T77INT 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_T77INT INTO WA_T77INT.


*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_T77INT_STR, 
MANDT TYPE STRING,
PERNR TYPE STRING,
PLVAR TYPE STRING,
ORGDAT TYPE STRING,
MASSN TYPE STRING,
MASSG TYPE STRING,
AUTOUNDO TYPE STRING,
CHANGETYPE TYPE STRING,
POOLTYPE TYPE STRING,
COUNTRYCHANGE TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
ACROSSBORDERUSER TYPE STRING,
OLD_JOB TYPE STRING,
OLD_JOB_ENDDA TYPE STRING,
OLD_POS TYPE STRING,
OLD_POS_ENDDA TYPE STRING,
OLD_ORGEH TYPE STRING,
OLD_ORGEH_ENDDA TYPE STRING,
CHNG_ROOT_OTYPE TYPE STRING,
CHNG_ROOT_OBJID TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T77INT_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_T77INT_STR-MANDT sy-vline 
WA_T77INT_STR-PERNR sy-vline 
WA_T77INT_STR-PLVAR sy-vline 
WA_T77INT_STR-ORGDAT sy-vline 
WA_T77INT_STR-MASSN sy-vline 
WA_T77INT_STR-MASSG sy-vline 
WA_T77INT_STR-AUTOUNDO sy-vline 
WA_T77INT_STR-CHANGETYPE sy-vline 
WA_T77INT_STR-POOLTYPE sy-vline 
WA_T77INT_STR-COUNTRYCHANGE sy-vline 
WA_T77INT_STR-OTYPE sy-vline 
WA_T77INT_STR-OBJID sy-vline 
WA_T77INT_STR-ACROSSBORDERUSER sy-vline 
WA_T77INT_STR-OLD_JOB sy-vline 
WA_T77INT_STR-OLD_JOB_ENDDA sy-vline 
WA_T77INT_STR-OLD_POS sy-vline 
WA_T77INT_STR-OLD_POS_ENDDA sy-vline 
WA_T77INT_STR-OLD_ORGEH sy-vline 
WA_T77INT_STR-OLD_ORGEH_ENDDA sy-vline 
WA_T77INT_STR-CHNG_ROOT_OTYPE sy-vline 
WA_T77INT_STR-CHNG_ROOT_OBJID sy-vline 
WA_T77INT_STR-AEDTM sy-vline 
WA_T77INT_STR-UNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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