ABAP Select data from SAP table RJKSDISSUE_REFISSUE_PUBLDATE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJKSDISSUE_REFISSUE_PUBLDATE
*  INTO TABLE @DATA(IT_RJKSDISSUE_REFISSUE_PUBLDATE2).
*--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_RJKSDISSUE_REFISSUE_PUBLDATE INDEX 1 INTO DATA(WA_RJKSDISSUE_REFISSUE_PUBLDATE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJKSDISSUE_REFISSUE_PUBLDATE>-ISSUE = 1.
<RJKSDISSUE_REFISSUE_PUBLDATE>-REF_ISSUE = 1.
<RJKSDISSUE_REFISSUE_PUBLDATE>-PUBLDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline, ENDLOOP.
   
*Add any further fields from structure WA_RJKSDISSUE_REFISSUE_PUBLDATE 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_RJKSDISSUE_REFISSUE_PUBLDATE 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_RJKSDISSUE_REFISSUE_PUBLDATE INTO WA_RJKSDISSUE_REFISSUE_PUBLDATE.


*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 MATN1, internal->external for field ISSUE
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJKSDISSUE_REFISSUE_PUBLDATE-ISSUE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJKSDISSUE_REFISSUE_PUBLDATE-ISSUE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field REF_ISSUE
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJKSDISSUE_REFISSUE_PUBLDATE-REF_ISSUE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJKSDISSUE_REFISSUE_PUBLDATE-REF_ISSUE.
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_RJKSDISSUE_REFISSUE_PUBLDATE_STR, 
ISSUE TYPE STRING,
REF_ISSUE TYPE STRING,
PUBLDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJKSDISSUE_REFISSUE_PUBLDATE_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_RJKSDISSUE_REFISSUE_PUBLDATE_STR-ISSUE sy-vline 
WA_RJKSDISSUE_REFISSUE_PUBLDATE_STR-REF_ISSUE sy-vline 
WA_RJKSDISSUE_REFISSUE_PUBLDATE_STR-PUBLDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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