ABAP Select data from SAP table RCGLSYVAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGLSYVAL
*  INTO TABLE @DATA(IT_RCGLSYVAL2).
*--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_RCGLSYVAL INDEX 1 INTO DATA(WA_RCGLSYVAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGLSYVAL>-LSYTYPE = 1.
<RCGLSYVAL>-LSYID = 1.
<RCGLSYVAL>-ORD = 1.
<RCGLSYVAL>-VAL_TYPE = 1.
<RCGLSYVAL>-VAL_STRING = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGLSYVAL-TDOBJECT, sy-vline,
  WA_RCGLSYVAL-TDID, sy-vline,
  WA_RCGLSYVAL-TDNAME, sy-vline,
  WA_RCGLSYVAL-TDSPRAS, sy-vline,
  WA_RCGLSYVAL-FILEP, sy-vline,
  WA_RCGLSYVAL-DOKAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGLSYVAL 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_RCGLSYVAL 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_RCGLSYVAL INTO WA_RCGLSYVAL.


*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 ISOLA, internal->external for field TDSPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RCGLSYVAL-TDSPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGLSYVAL-TDSPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCGLSYVAL-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGLSYVAL-DOKNR.
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_RCGLSYVAL_STR, 
LSYTYPE TYPE STRING,
LSYID TYPE STRING,
ORD TYPE STRING,
VAL_TYPE TYPE STRING,
VAL_STRING TYPE STRING,
TDOBJECT TYPE STRING,
TDID TYPE STRING,
TDNAME TYPE STRING,
TDSPRAS TYPE STRING,
FILEP TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKTL TYPE STRING,
DOKVR TYPE STRING,
MARK_CHANG TYPE STRING,
FTXT_COUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGLSYVAL_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_RCGLSYVAL_STR-LSYTYPE sy-vline 
WA_RCGLSYVAL_STR-LSYID sy-vline 
WA_RCGLSYVAL_STR-ORD sy-vline 
WA_RCGLSYVAL_STR-VAL_TYPE sy-vline 
WA_RCGLSYVAL_STR-VAL_STRING sy-vline 
WA_RCGLSYVAL_STR-TDOBJECT sy-vline 
WA_RCGLSYVAL_STR-TDID sy-vline 
WA_RCGLSYVAL_STR-TDNAME sy-vline 
WA_RCGLSYVAL_STR-TDSPRAS sy-vline 
WA_RCGLSYVAL_STR-FILEP sy-vline 
WA_RCGLSYVAL_STR-DOKAR sy-vline 
WA_RCGLSYVAL_STR-DOKNR sy-vline 
WA_RCGLSYVAL_STR-DOKTL sy-vline 
WA_RCGLSYVAL_STR-DOKVR sy-vline 
WA_RCGLSYVAL_STR-MARK_CHANG sy-vline 
WA_RCGLSYVAL_STR-FTXT_COUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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