ABAP Select data from SAP table /TDAG/RCSS_EXP_ALL_LEGPRE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /TDAG/RCSS_EXP_ALL_LEGPRE 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 /TDAG/RCSS_EXP_ALL_LEGPRE. 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 /TDAG/RCSS_EXP_ALL_LEGPRE 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_/TDAG/RCSS_EXP_ALL_LEGPRE TYPE STANDARD TABLE OF /TDAG/RCSS_EXP_ALL_LEGPRE,
      WA_/TDAG/RCSS_EXP_ALL_LEGPRE TYPE /TDAG/RCSS_EXP_ALL_LEGPRE,
      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: </TDAG/RCSS_EXP_ALL_LEGPRE> TYPE /TDAG/RCSS_EXP_ALL_LEGPRE.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /TDAG/RCSS_EXP_ALL_LEGPRE
  INTO TABLE IT_/TDAG/RCSS_EXP_ALL_LEGPRE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /TDAG/RCSS_EXP_ALL_LEGPRE
*  INTO TABLE @DATA(IT_/TDAG/RCSS_EXP_ALL_LEGPRE2).
*--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_/TDAG/RCSS_EXP_ALL_LEGPRE INDEX 1 INTO DATA(WA_/TDAG/RCSS_EXP_ALL_LEGPRE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/TDAG/RCSS_EXP_ALL_LEGPRE ASSIGNING </TDAG/RCSS_EXP_ALL_LEGPRE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</TDAG/RCSS_EXP_ALL_LEGPRE>-RECN = 1.
</TDAG/RCSS_EXP_ALL_LEGPRE>-SUBID = 1.
</TDAG/RCSS_EXP_ALL_LEGPRE>-SUBNAME = 1.
</TDAG/RCSS_EXP_ALL_LEGPRE>-CASNR = 1.
</TDAG/RCSS_EXP_ALL_LEGPRE>-ECNR = 1.

ENDLOOP.

LOOP AT IT_/TDAG/RCSS_EXP_ALL_LEGPRE INTO WA_/TDAG/RCSS_EXP_ALL_LEGPRE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/TDAG/RCSS_EXP_ALL_LEGPRE-RSAG, sy-vline,
  WA_/TDAG/RCSS_EXP_ALL_LEGPRE-LGENT_CODE, sy-vline,
  WA_/TDAG/RCSS_EXP_ALL_LEGPRE-LGENT_NAME, sy-vline,
  WA_/TDAG/RCSS_EXP_ALL_LEGPRE-CONTACT_CODE, sy-vline,
  WA_/TDAG/RCSS_EXP_ALL_LEGPRE-CONTACT_NAME, sy-vline,
  WA_/TDAG/RCSS_EXP_ALL_LEGPRE-THIRDPARTY_TYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/TDAG/RCSS_EXP_ALL_LEGPRE 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_/TDAG/RCSS_EXP_ALL_LEGPRE 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_/TDAG/RCSS_EXP_ALL_LEGPRE INTO WA_/TDAG/RCSS_EXP_ALL_LEGPRE.


*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 RECN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/RCSS_EXP_ALL_LEGPRE-RECN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/RCSS_EXP_ALL_LEGPRE-RECN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SPEC1, internal->external for field SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/RCSS_EXP_ALL_LEGPRE-SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/RCSS_EXP_ALL_LEGPRE-SUBID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CONTACT_CODE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/RCSS_EXP_ALL_LEGPRE-CONTACT_CODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/RCSS_EXP_ALL_LEGPRE-CONTACT_CODE.
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_/TDAG/RCSS_EXP_ALL_LEGPRE_STR, 
RECN TYPE STRING,
SUBID TYPE STRING,
SUBNAME TYPE STRING,
CASNR TYPE STRING,
ECNR TYPE STRING,
RSAG TYPE STRING,
LGENT_CODE TYPE STRING,
LGENT_NAME TYPE STRING,
CONTACT_CODE TYPE STRING,
CONTACT_NAME TYPE STRING,
THIRDPARTY_TYPE TYPE STRING,
THIRDPARTY_CODE TYPE STRING,
THIRDPARTY_NAME TYPE STRING,
MULTICONST TYPE STRING,
REGDEADLINE TYPE STRING,
TOBAND_CODE TYPE STRING,
TOBAND_NAME TYPE STRING,
STATUS TYPE STRING,
STATUSJUST TYPE STRING,
PREREGDATE TYPE STRING,
PREREGNUMBER TYPE STRING,
INFO TYPE STRING,
REMARK TYPE STRING,
NOTIFICATION TYPE STRING,
PRESIEFSTATUS TYPE STRING,
PRESIEFROLE TYPE STRING,
SFF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/TDAG/RCSS_EXP_ALL_LEGPRE_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_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-RECN sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-SUBID sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-SUBNAME sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-CASNR sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-ECNR sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-RSAG sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-LGENT_CODE sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-LGENT_NAME sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-CONTACT_CODE sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-CONTACT_NAME sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-THIRDPARTY_TYPE sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-THIRDPARTY_CODE sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-THIRDPARTY_NAME sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-MULTICONST sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-REGDEADLINE sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-TOBAND_CODE sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-TOBAND_NAME sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-STATUS sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-STATUSJUST sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-PREREGDATE sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-PREREGNUMBER sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-INFO sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-REMARK sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-NOTIFICATION sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-PRESIEFSTATUS sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-PRESIEFROLE sy-vline 
WA_/TDAG/RCSS_EXP_ALL_LEGPRE_STR-SFF sy-vline      INTO ld_text SEPARATED BY SPACE.

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