ABAP Select data from SAP table J_8A3TECHN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_8A3TECHN 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 J_8A3TECHN. 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 J_8A3TECHN 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_J_8A3TECHN TYPE STANDARD TABLE OF J_8A3TECHN,
      WA_J_8A3TECHN TYPE J_8A3TECHN,
      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: <J_8A3TECHN> TYPE J_8A3TECHN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_8A3TECHN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_8A3TECHN
  INTO TABLE IT_J_8A3TECHN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_8A3TECHN
*  INTO TABLE @DATA(IT_J_8A3TECHN2).
*--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_J_8A3TECHN INDEX 1 INTO DATA(WA_J_8A3TECHN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_8A3TECHN ASSIGNING <J_8A3TECHN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_8A3TECHN>-MANDT = 1.
<J_8A3TECHN>-USR = 1.
<J_8A3TECHN>-BEG_RO_120 = 1.
<J_8A3TECHN>-BEG_CO_120 = 1.
<J_8A3TECHN>-END_RO_120 = 1.

ENDLOOP.

LOOP AT IT_J_8A3TECHN INTO WA_J_8A3TECHN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_8A3TECHN-END_CO_120, sy-vline,
  WA_J_8A3TECHN-BTN_KO_120, sy-vline,
  WA_J_8A3TECHN-BTN_PO_120, sy-vline,
  WA_J_8A3TECHN-BTN_IN_120, sy-vline,
  WA_J_8A3TECHN-BEG_RO_110, sy-vline,
  WA_J_8A3TECHN-BEG_CO_110, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_8A3TECHN 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_J_8A3TECHN 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_J_8A3TECHN INTO WA_J_8A3TECHN.


*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_J_8A3TECHN_STR, 
MANDT TYPE STRING,
USR TYPE STRING,
BEG_RO_120 TYPE STRING,
BEG_CO_120 TYPE STRING,
END_RO_120 TYPE STRING,
END_CO_120 TYPE STRING,
BTN_KO_120 TYPE STRING,
BTN_PO_120 TYPE STRING,
BTN_IN_120 TYPE STRING,
BEG_RO_110 TYPE STRING,
BEG_CO_110 TYPE STRING,
END_RO_110 TYPE STRING,
END_CO_110 TYPE STRING,
VE_OFF_110 TYPE STRING,
VE_POS_110 TYPE STRING,
VE_USE_110 TYPE STRING,
DA_POS_110 TYPE STRING,
DA_USE_110 TYPE STRING,
SZ_POS_110 TYPE STRING,
SZ_USE_110 TYPE STRING,
SZ_FIX_110 TYPE STRING,
USRVON_110 TYPE STRING,
USRBIS_110 TYPE STRING,
BTN_IN_110 TYPE STRING,
BTN_ST_110 TYPE STRING,
BTN_UA_110 TYPE STRING,
BEG_RO_130 TYPE STRING,
BEG_CO_130 TYPE STRING,
END_RO_130 TYPE STRING,
END_CO_130 TYPE STRING,
END_CB_130 TYPE STRING,
BTN_KO_130 TYPE STRING,
BTN_PO_130 TYPE STRING,
BTN_TE_130 TYPE STRING,
BTN_IN_130 TYPE STRING,
SIZEVA_130 TYPE STRING,
BEG_RO_POS TYPE STRING,
BEG_CO_POS TYPE STRING,
BEG_RO_100 TYPE STRING,
BEG_CO_100 TYPE STRING,
END_RO_100 TYPE STRING,
END_CO_100 TYPE STRING,
BTN_KO_100 TYPE STRING,
BTN_PO_100 TYPE STRING,
BTN_IN_100 TYPE STRING,
BEG_RO_300 TYPE STRING,
BEG_CO_300 TYPE STRING,
END_RO_300 TYPE STRING,
END_CO_300 TYPE STRING,
BTN_PO_300 TYPE STRING,
BTN_IN_300 TYPE STRING,
BTN_EX_300 TYPE STRING,
BEG_RO_310 TYPE STRING,
BEG_CO_310 TYPE STRING,
END_RO_310 TYPE STRING,
END_CO_310 TYPE STRING,
BTN_PO_310 TYPE STRING,
BTN_IN_310 TYPE STRING,
BEG_RO_320 TYPE STRING,
BEG_CO_320 TYPE STRING,
END_RO_320 TYPE STRING,
END_CO_320 TYPE STRING,
BTN_PO_320 TYPE STRING,
BTN_IN_320 TYPE STRING,
BTN_AL_320 TYPE STRING,
OBJKY_AUTO TYPE STRING,
OBJBE_AUTO TYPE STRING,
BEG_CO_111 TYPE STRING,
BEG_RO_111 TYPE STRING,
END_CO_111 TYPE STRING,
END_RO_111 TYPE STRING,
LOGING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_8A3TECHN_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_J_8A3TECHN_STR-MANDT sy-vline 
WA_J_8A3TECHN_STR-USR sy-vline 
WA_J_8A3TECHN_STR-BEG_RO_120 sy-vline 
WA_J_8A3TECHN_STR-BEG_CO_120 sy-vline 
WA_J_8A3TECHN_STR-END_RO_120 sy-vline 
WA_J_8A3TECHN_STR-END_CO_120 sy-vline 
WA_J_8A3TECHN_STR-BTN_KO_120 sy-vline 
WA_J_8A3TECHN_STR-BTN_PO_120 sy-vline 
WA_J_8A3TECHN_STR-BTN_IN_120 sy-vline 
WA_J_8A3TECHN_STR-BEG_RO_110 sy-vline 
WA_J_8A3TECHN_STR-BEG_CO_110 sy-vline 
WA_J_8A3TECHN_STR-END_RO_110 sy-vline 
WA_J_8A3TECHN_STR-END_CO_110 sy-vline 
WA_J_8A3TECHN_STR-VE_OFF_110 sy-vline 
WA_J_8A3TECHN_STR-VE_POS_110 sy-vline 
WA_J_8A3TECHN_STR-VE_USE_110 sy-vline 
WA_J_8A3TECHN_STR-DA_POS_110 sy-vline 
WA_J_8A3TECHN_STR-DA_USE_110 sy-vline 
WA_J_8A3TECHN_STR-SZ_POS_110 sy-vline 
WA_J_8A3TECHN_STR-SZ_USE_110 sy-vline 
WA_J_8A3TECHN_STR-SZ_FIX_110 sy-vline 
WA_J_8A3TECHN_STR-USRVON_110 sy-vline 
WA_J_8A3TECHN_STR-USRBIS_110 sy-vline 
WA_J_8A3TECHN_STR-BTN_IN_110 sy-vline 
WA_J_8A3TECHN_STR-BTN_ST_110 sy-vline 
WA_J_8A3TECHN_STR-BTN_UA_110 sy-vline 
WA_J_8A3TECHN_STR-BEG_RO_130 sy-vline 
WA_J_8A3TECHN_STR-BEG_CO_130 sy-vline 
WA_J_8A3TECHN_STR-END_RO_130 sy-vline 
WA_J_8A3TECHN_STR-END_CO_130 sy-vline 
WA_J_8A3TECHN_STR-END_CB_130 sy-vline 
WA_J_8A3TECHN_STR-BTN_KO_130 sy-vline 
WA_J_8A3TECHN_STR-BTN_PO_130 sy-vline 
WA_J_8A3TECHN_STR-BTN_TE_130 sy-vline 
WA_J_8A3TECHN_STR-BTN_IN_130 sy-vline 
WA_J_8A3TECHN_STR-SIZEVA_130 sy-vline 
WA_J_8A3TECHN_STR-BEG_RO_POS sy-vline 
WA_J_8A3TECHN_STR-BEG_CO_POS sy-vline 
WA_J_8A3TECHN_STR-BEG_RO_100 sy-vline 
WA_J_8A3TECHN_STR-BEG_CO_100 sy-vline 
WA_J_8A3TECHN_STR-END_RO_100 sy-vline 
WA_J_8A3TECHN_STR-END_CO_100 sy-vline 
WA_J_8A3TECHN_STR-BTN_KO_100 sy-vline 
WA_J_8A3TECHN_STR-BTN_PO_100 sy-vline 
WA_J_8A3TECHN_STR-BTN_IN_100 sy-vline 
WA_J_8A3TECHN_STR-BEG_RO_300 sy-vline 
WA_J_8A3TECHN_STR-BEG_CO_300 sy-vline 
WA_J_8A3TECHN_STR-END_RO_300 sy-vline 
WA_J_8A3TECHN_STR-END_CO_300 sy-vline 
WA_J_8A3TECHN_STR-BTN_PO_300 sy-vline 
WA_J_8A3TECHN_STR-BTN_IN_300 sy-vline 
WA_J_8A3TECHN_STR-BTN_EX_300 sy-vline 
WA_J_8A3TECHN_STR-BEG_RO_310 sy-vline 
WA_J_8A3TECHN_STR-BEG_CO_310 sy-vline 
WA_J_8A3TECHN_STR-END_RO_310 sy-vline 
WA_J_8A3TECHN_STR-END_CO_310 sy-vline 
WA_J_8A3TECHN_STR-BTN_PO_310 sy-vline 
WA_J_8A3TECHN_STR-BTN_IN_310 sy-vline 
WA_J_8A3TECHN_STR-BEG_RO_320 sy-vline 
WA_J_8A3TECHN_STR-BEG_CO_320 sy-vline 
WA_J_8A3TECHN_STR-END_RO_320 sy-vline 
WA_J_8A3TECHN_STR-END_CO_320 sy-vline 
WA_J_8A3TECHN_STR-BTN_PO_320 sy-vline 
WA_J_8A3TECHN_STR-BTN_IN_320 sy-vline 
WA_J_8A3TECHN_STR-BTN_AL_320 sy-vline 
WA_J_8A3TECHN_STR-OBJKY_AUTO sy-vline 
WA_J_8A3TECHN_STR-OBJBE_AUTO sy-vline 
WA_J_8A3TECHN_STR-BEG_CO_111 sy-vline 
WA_J_8A3TECHN_STR-BEG_RO_111 sy-vline 
WA_J_8A3TECHN_STR-END_CO_111 sy-vline 
WA_J_8A3TECHN_STR-END_RO_111 sy-vline 
WA_J_8A3TECHN_STR-LOGING sy-vline      INTO ld_text SEPARATED BY SPACE.

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