ABAP Select data from SAP table AD01C_SELA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP AD01C_SELA 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 AD01C_SELA. 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 AD01C_SELA 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_AD01C_SELA TYPE STANDARD TABLE OF AD01C_SELA,
      WA_AD01C_SELA TYPE AD01C_SELA,
      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: <AD01C_SELA> TYPE AD01C_SELA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_AD01C_SELA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM AD01C_SELA
  INTO TABLE IT_AD01C_SELA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AD01C_SELA
*  INTO TABLE @DATA(IT_AD01C_SELA2).
*--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_AD01C_SELA INDEX 1 INTO DATA(WA_AD01C_SELA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_AD01C_SELA ASSIGNING <AD01C_SELA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AD01C_SELA>-MANDT = 1.
<AD01C_SELA>-PROFNR = 1.
<AD01C_SELA>-DPUS = 1.
<AD01C_SELA>-LINENR = 1.
<AD01C_SELA>-FIELDNAME = 1.

ENDLOOP.

LOOP AT IT_AD01C_SELA INTO WA_AD01C_SELA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AD01C_SELA-VAL_EXCL, sy-vline,
  WA_AD01C_SELA-VAL_FROM, sy-vline,
  WA_AD01C_SELA-VAL_TO, sy-vline,
  WA_AD01C_SELA-SETNR, sy-vline,
  WA_AD01C_SELA-SETNAME, sy-vline,
  WA_AD01C_SELA-SETTAB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AD01C_SELA 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_AD01C_SELA 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_AD01C_SELA INTO WA_AD01C_SELA.


*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_AD01C_SELA_STR, 
MANDT TYPE STRING,
PROFNR TYPE STRING,
DPUS TYPE STRING,
LINENR TYPE STRING,
FIELDNAME TYPE STRING,
VAL_EXCL TYPE STRING,
VAL_FROM TYPE STRING,
VAL_TO TYPE STRING,
SETNR TYPE STRING,
SETNAME TYPE STRING,
SETTAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AD01C_SELA_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_AD01C_SELA_STR-MANDT sy-vline 
WA_AD01C_SELA_STR-PROFNR sy-vline 
WA_AD01C_SELA_STR-DPUS sy-vline 
WA_AD01C_SELA_STR-LINENR sy-vline 
WA_AD01C_SELA_STR-FIELDNAME sy-vline 
WA_AD01C_SELA_STR-VAL_EXCL sy-vline 
WA_AD01C_SELA_STR-VAL_FROM sy-vline 
WA_AD01C_SELA_STR-VAL_TO sy-vline 
WA_AD01C_SELA_STR-SETNR sy-vline 
WA_AD01C_SELA_STR-SETNAME sy-vline 
WA_AD01C_SELA_STR-SETTAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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