ABAP Select data from SAP table T462 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T462 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 T462. 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 T462 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_T462 TYPE STANDARD TABLE OF T462,
      WA_T462 TYPE T462,
      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: <T462> TYPE T462.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T462.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T462
  INTO TABLE IT_T462.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T462
*  INTO TABLE @DATA(IT_T4622).
*--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_T462 INDEX 1 INTO DATA(WA_T4622).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T462 ASSIGNING <T462>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T462>-MANDT = 1.
<T462>-ERGBZ = 1.
<T462>-SVPEB = 1.
<T462>-SANGB = 1.
<T462>-SKDAU = 1.

ENDLOOP.

LOOP AT IT_T462 INTO WA_T462.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T462-SLIEF, sy-vline,
  WA_T462-SSKBD, sy-vline,
  WA_T462-SMRES, sy-vline,
  WA_T462-SLBED, sy-vline,
  WA_T462-SARES, sy-vline,
  WA_T462-SAPLF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T462 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_T462 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_T462 INTO WA_T462.


*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_T462_STR, 
MANDT TYPE STRING,
ERGBZ TYPE STRING,
SVPEB TYPE STRING,
SANGB TYPE STRING,
SKDAU TYPE STRING,
SLIEF TYPE STRING,
SSKBD TYPE STRING,
SMRES TYPE STRING,
SLBED TYPE STRING,
SARES TYPE STRING,
SAPLF TYPE STRING,
SABES TYPE STRING,
SABAN TYPE STRING,
SALPE TYPE STRING,
SURES TYPE STRING,
SFERT TYPE STRING,
SPLAF TYPE STRING,
SBEST TYPE STRING,
SBANF TYPE STRING,
SLPET TYPE STRING,
SAVIS TYPE STRING,
SQMPR TYPE STRING,
SBWRK TYPE STRING,
SBSIC TYPE STRING,
SBNFR TYPE STRING,
SBGSP TYPE STRING,
SBUML TYPE STRING,
SBKON_EDL TYPE STRING,
SRABR TYPE STRING,
SSGUT TYPE STRING,
DTALL TYPE STRING,
DTAPP TYPE STRING,
DTCUS TYPE STRING,
STADT TYPE STRING,
SSPAN TYPE STRING,
ENDDT TYPE STRING,
ESPAN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T462_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_T462_STR-MANDT sy-vline 
WA_T462_STR-ERGBZ sy-vline 
WA_T462_STR-SVPEB sy-vline 
WA_T462_STR-SANGB sy-vline 
WA_T462_STR-SKDAU sy-vline 
WA_T462_STR-SLIEF sy-vline 
WA_T462_STR-SSKBD sy-vline 
WA_T462_STR-SMRES sy-vline 
WA_T462_STR-SLBED sy-vline 
WA_T462_STR-SARES sy-vline 
WA_T462_STR-SAPLF sy-vline 
WA_T462_STR-SABES sy-vline 
WA_T462_STR-SABAN sy-vline 
WA_T462_STR-SALPE sy-vline 
WA_T462_STR-SURES sy-vline 
WA_T462_STR-SFERT sy-vline 
WA_T462_STR-SPLAF sy-vline 
WA_T462_STR-SBEST sy-vline 
WA_T462_STR-SBANF sy-vline 
WA_T462_STR-SLPET sy-vline 
WA_T462_STR-SAVIS sy-vline 
WA_T462_STR-SQMPR sy-vline 
WA_T462_STR-SBWRK sy-vline 
WA_T462_STR-SBSIC sy-vline 
WA_T462_STR-SBNFR sy-vline 
WA_T462_STR-SBGSP sy-vline 
WA_T462_STR-SBUML sy-vline 
WA_T462_STR-SBKON_EDL sy-vline 
WA_T462_STR-SRABR sy-vline 
WA_T462_STR-SSGUT sy-vline 
WA_T462_STR-DTALL sy-vline 
WA_T462_STR-DTAPP sy-vline 
WA_T462_STR-DTCUS sy-vline 
WA_T462_STR-STADT sy-vline 
WA_T462_STR-SSPAN sy-vline 
WA_T462_STR-ENDDT sy-vline 
WA_T462_STR-ESPAN sy-vline      INTO ld_text SEPARATED BY SPACE.

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