ABAP Select data from SAP table GRPC_S_API_RLCRVAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GRPC_S_API_RLCRVAL
*  INTO TABLE @DATA(IT_GRPC_S_API_RLCRVAL2).
*--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_GRPC_S_API_RLCRVAL INDEX 1 INTO DATA(WA_GRPC_S_API_RLCRVAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GRPC_S_API_RLCRVAL>-RULE_ID = 1.
<GRPC_S_API_RLCRVAL>-RULEVAR_ID = 1.
<GRPC_S_API_RLCRVAL>-RULEID = 1.
<GRPC_S_API_RLCRVAL>-RULESTEP = 1.
<GRPC_S_API_RLCRVAL>-SCHEMANO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GRPC_S_API_RLCRVAL-RULEVAR, sy-vline,
  WA_GRPC_S_API_RLCRVAL-COUNTER, sy-vline,
  WA_GRPC_S_API_RLCRVAL-RULESETID, sy-vline,
  WA_GRPC_S_API_RLCRVAL-SIGN, sy-vline,
  WA_GRPC_S_API_RLCRVAL-OPTIONS, sy-vline,
  WA_GRPC_S_API_RLCRVAL-VALUEFROM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GRPC_S_API_RLCRVAL 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_GRPC_S_API_RLCRVAL 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_GRPC_S_API_RLCRVAL INTO WA_GRPC_S_API_RLCRVAL.


*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_GRPC_S_API_RLCRVAL_STR, 
RULE_ID TYPE STRING,
RULEVAR_ID TYPE STRING,
RULEID TYPE STRING,
RULESTEP TYPE STRING,
SCHEMANO TYPE STRING,
RULEVAR TYPE STRING,
COUNTER TYPE STRING,
RULESETID TYPE STRING,
SIGN TYPE STRING,
OPTIONS TYPE STRING,
VALUEFROM TYPE STRING,
VALUETO TYPE STRING,
RANGE TYPE STRING,
VERSION TYPE STRING,
ACTION TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
RULEVAR_DESC TYPE STRING,
RANGE_SAP TYPE STRING,
RANGE_ORCL TYPE STRING,
RANGE_SAP_CONFIG TYPE STRING,
DATEFROM TYPE STRING,
DATETO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GRPC_S_API_RLCRVAL_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_GRPC_S_API_RLCRVAL_STR-RULE_ID sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-RULEVAR_ID sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-RULEID sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-RULESTEP sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-SCHEMANO sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-RULEVAR sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-COUNTER sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-RULESETID sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-SIGN sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-OPTIONS sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-VALUEFROM sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-VALUETO sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-RANGE sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-VERSION sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-ACTION sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-TABNAME sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-FIELDNAME sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-RULEVAR_DESC sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-RANGE_SAP sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-RANGE_ORCL sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-RANGE_SAP_CONFIG sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-DATEFROM sy-vline 
WA_GRPC_S_API_RLCRVAL_STR-DATETO sy-vline      INTO ld_text SEPARATED BY SPACE.

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