ABAP Select data from SAP table T777D into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T777D 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 T777D. 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 T777D 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_T777D TYPE STANDARD TABLE OF T777D,
      WA_T777D TYPE T777D,
      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: <T777D> TYPE T777D.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T777D.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T777D
  INTO TABLE IT_T777D.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T777D
*  INTO TABLE @DATA(IT_T777D2).
*--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_T777D INDEX 1 INTO DATA(WA_T777D2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T777D ASSIGNING <T777D>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T777D>-INFTY = 1.
<T777D>-DIALG = 1.
<T777D>-PPNNN = 1.
<T777D>-PPSUB = 1.
<T777D>-EDYNR = 1.

ENDLOOP.

LOOP AT IT_T777D INTO WA_T777D.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T777D-LDYNR, sy-vline,
  WA_T777D-VTASK, sy-vline,
  WA_T777D-LANGU, sy-vline,
  WA_T777D-DBTAB, sy-vline,
  WA_T777D-TBTAB, sy-vline,
  WA_T777D-IDOCS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T777D 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_T777D 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_T777D INTO WA_T777D.


*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_T777D_STR, 
INFTY TYPE STRING,
DIALG TYPE STRING,
PPNNN TYPE STRING,
PPSUB TYPE STRING,
EDYNR TYPE STRING,
LDYNR TYPE STRING,
VTASK TYPE STRING,
LANGU TYPE STRING,
DBTAB TYPE STRING,
TBTAB TYPE STRING,
IDOCS TYPE STRING,
IDOCS2 TYPE STRING,
IDOCS3 TYPE STRING,
PTNNNN TYPE STRING,
PPNNN_EXP TYPE STRING,
REPID TYPE STRING,
BTCI_PROG TYPE STRING,
PAPD TYPE STRING,
APTAB TYPE STRING,
ZRMKN TYPE STRING,
NAMST TYPE STRING,
STYPT TYPE STRING,
SYTXT TYPE STRING,
ZBTAB TYPE STRING,
KFAST TYPE STRING,
INFKN TYPE STRING,
PSZRM TYPE STRING,
EXT_INFTY TYPE STRING,
NAT_INFTY TYPE STRING,
PAY_INFTY TYPE STRING,
NAT_SUBTY TYPE STRING,
TIM_INFTY TYPE STRING,
ITVERSIONS TYPE STRING,
FLG_OBJPS TYPE STRING,
FLG_SPRPS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T777D_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_T777D_STR-INFTY sy-vline 
WA_T777D_STR-DIALG sy-vline 
WA_T777D_STR-PPNNN sy-vline 
WA_T777D_STR-PPSUB sy-vline 
WA_T777D_STR-EDYNR sy-vline 
WA_T777D_STR-LDYNR sy-vline 
WA_T777D_STR-VTASK sy-vline 
WA_T777D_STR-LANGU sy-vline 
WA_T777D_STR-DBTAB sy-vline 
WA_T777D_STR-TBTAB sy-vline 
WA_T777D_STR-IDOCS sy-vline 
WA_T777D_STR-IDOCS2 sy-vline 
WA_T777D_STR-IDOCS3 sy-vline 
WA_T777D_STR-PTNNNN sy-vline 
WA_T777D_STR-PPNNN_EXP sy-vline 
WA_T777D_STR-REPID sy-vline 
WA_T777D_STR-BTCI_PROG sy-vline 
WA_T777D_STR-PAPD sy-vline 
WA_T777D_STR-APTAB sy-vline 
WA_T777D_STR-ZRMKN sy-vline 
WA_T777D_STR-NAMST sy-vline 
WA_T777D_STR-STYPT sy-vline 
WA_T777D_STR-SYTXT sy-vline 
WA_T777D_STR-ZBTAB sy-vline 
WA_T777D_STR-KFAST sy-vline 
WA_T777D_STR-INFKN sy-vline 
WA_T777D_STR-PSZRM sy-vline 
WA_T777D_STR-EXT_INFTY sy-vline 
WA_T777D_STR-NAT_INFTY sy-vline 
WA_T777D_STR-PAY_INFTY sy-vline 
WA_T777D_STR-NAT_SUBTY sy-vline 
WA_T777D_STR-TIM_INFTY sy-vline 
WA_T777D_STR-ITVERSIONS sy-vline 
WA_T777D_STR-FLG_OBJPS sy-vline 
WA_T777D_STR-FLG_SPRPS sy-vline      INTO ld_text SEPARATED BY SPACE.

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