ABAP Select data from SAP table ISSR_ISSRFLDEA_SIGN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISSR_ISSRFLDEA_SIGN
*  INTO TABLE @DATA(IT_ISSR_ISSRFLDEA_SIGN2).
*--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_ISSR_ISSRFLDEA_SIGN INDEX 1 INTO DATA(WA_ISSR_ISSRFLDEA_SIGN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISSR_ISSRFLDEA_SIGN>-KONTL_3 = 1.
<ISSR_ISSRFLDEA_SIGN>-RSPARTE = 1.
<ISSR_ISSRFLDEA_SIGN>-RSTOCKBAV = 1.
<ISSR_ISSRFLDEA_SIGN>-RSTOCKFA = 1.
<ISSR_ISSRFLDEA_SIGN>-RDV = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISSR_ISSRFLDEA_SIGN-RDVUA, sy-vline,
  WA_ISSR_ISSRFLDEA_SIGN-ABS54AVAG, sy-vline,
  WA_ISSR_ISSRFLDEA_SIGN-NW101, sy-vline,
  WA_ISSR_ISSRFLDEA_SIGN-NW600, sy-vline,
  WA_ISSR_ISSRFLDEA_SIGN-NW102, sy-vline,
  WA_ISSR_ISSRFLDEA_SIGN-NW201, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISSR_ISSRFLDEA_SIGN 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_ISSR_ISSRFLDEA_SIGN 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_ISSR_ISSRFLDEA_SIGN INTO WA_ISSR_ISSRFLDEA_SIGN.


*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_ISSR_ISSRFLDEA_SIGN_STR, 
KONTL_3 TYPE STRING,
RSPARTE TYPE STRING,
RSTOCKBAV TYPE STRING,
RSTOCKFA TYPE STRING,
RDV TYPE STRING,
RDVUA TYPE STRING,
ABS54AVAG TYPE STRING,
NW101 TYPE STRING,
NW600 TYPE STRING,
NW102 TYPE STRING,
NW201 TYPE STRING,
NW670_3 TYPE STRING,
NW671_3 TYPE STRING,
R59710_1 TYPE STRING,
R59710_2 TYPE STRING,
R59710_3 TYPE STRING,
R59710_4 TYPE STRING,
BWHR_3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISSR_ISSRFLDEA_SIGN_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_ISSR_ISSRFLDEA_SIGN_STR-KONTL_3 sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-RSPARTE sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-RSTOCKBAV sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-RSTOCKFA sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-RDV sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-RDVUA sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-ABS54AVAG sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-NW101 sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-NW600 sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-NW102 sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-NW201 sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-NW670_3 sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-NW671_3 sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-R59710_1 sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-R59710_2 sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-R59710_3 sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-R59710_4 sy-vline 
WA_ISSR_ISSRFLDEA_SIGN_STR-BWHR_3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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