ABAP Select data from SAP table T8J4G into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP T8J4G 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 T8J4G. 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 T8J4G 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_T8J4G TYPE STANDARD TABLE OF T8J4G,
      WA_T8J4G TYPE T8J4G,
      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: <T8J4G> TYPE T8J4G.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T8J4G.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T8J4G
  INTO TABLE IT_T8J4G.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T8J4G
*  INTO TABLE @DATA(IT_T8J4G2).
*--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_T8J4G INDEX 1 INTO DATA(WA_T8J4G2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T8J4G ASSIGNING <T8J4G>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T8J4G>-MANDT = 1.
<T8J4G>-BUKRS = 1.
<T8J4G>-NOBNO = 1.
<T8J4G>-NBTEXT = 1.
<T8J4G>-UNAME = 1.

ENDLOOP.

LOOP AT IT_T8J4G INTO WA_T8J4G.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T8J4G-SDATE, sy-vline,
  WA_T8J4G-PARTN, sy-vline,
  WA_T8J4G-VNAME, sy-vline,
  WA_T8J4G-FUNDCUR, sy-vline,
  WA_T8J4G-BANK_TYPE, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_T8J4G 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_T8J4G 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_T8J4G INTO WA_T8J4G.


*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.

*Conversion exit ALPHA, internal->external for field PARTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8J4G-PARTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8J4G-PARTN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VNAME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8J4G-VNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8J4G-VNAME.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_T8J4G_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
NOBNO TYPE STRING,
NBTEXT TYPE STRING,
UNAME TYPE STRING,
SDATE TYPE STRING,
PARTN TYPE STRING,
VNAME TYPE STRING,
FUNDCUR TYPE STRING,
BANK_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T8J4G_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_T8J4G_STR-MANDT sy-vline 
WA_T8J4G_STR-BUKRS sy-vline 
WA_T8J4G_STR-NOBNO sy-vline 
WA_T8J4G_STR-NBTEXT sy-vline 
WA_T8J4G_STR-UNAME sy-vline 
WA_T8J4G_STR-SDATE sy-vline 
WA_T8J4G_STR-PARTN sy-vline 
WA_T8J4G_STR-VNAME sy-vline 
WA_T8J4G_STR-FUNDCUR sy-vline 
WA_T8J4G_STR-BANK_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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