ABAP Select data from SAP table GRPC_S_API_RLCR 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_RLCR 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_RLCR. 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_RLCR 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_RLCR TYPE STANDARD TABLE OF GRPC_S_API_RLCR,
      WA_GRPC_S_API_RLCR TYPE GRPC_S_API_RLCR,
      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_RLCR> TYPE GRPC_S_API_RLCR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GRPC_S_API_RLCR
*  INTO TABLE @DATA(IT_GRPC_S_API_RLCR2).
*--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_RLCR INDEX 1 INTO DATA(WA_GRPC_S_API_RLCR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GRPC_S_API_RLCR>-RULEVAR_ID = 1.
<GRPC_S_API_RLCR>-RULEVAR = 1.
<GRPC_S_API_RLCR>-RULEVAR_DESC = 1.
<GRPC_S_API_RLCR>-SYSTEMTYPE = 1.
<GRPC_S_API_RLCR>-CONNECTOR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GRPC_S_API_RLCR-RLCRTYPE, sy-vline,
  WA_GRPC_S_API_RLCR-RLCRTYPE_TXT, sy-vline,
  WA_GRPC_S_API_RLCR-ISORGUNIT, sy-vline,
  WA_GRPC_S_API_RLCR-ISORGUNIT_TXT, sy-vline,
  WA_GRPC_S_API_RLCR-CREATED_BY_QUERY, sy-vline,
  WA_GRPC_S_API_RLCR-VALUETYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GRPC_S_API_RLCR 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_RLCR 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_RLCR INTO WA_GRPC_S_API_RLCR.


*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 SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_GRPC_S_API_RLCR-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GRPC_S_API_RLCR-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_GRPC_S_API_RLCR-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GRPC_S_API_RLCR-DATATYPE.
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_GRPC_S_API_RLCR_STR, 
RULEVAR_ID TYPE STRING,
RULEVAR TYPE STRING,
RULEVAR_DESC TYPE STRING,
SYSTEMTYPE TYPE STRING,
CONNECTOR TYPE STRING,
RLCRTYPE TYPE STRING,
RLCRTYPE_TXT TYPE STRING,
ISORGUNIT TYPE STRING,
ISORGUNIT_TXT TYPE STRING,
CREATED_BY_QUERY TYPE STRING,
VALUETYPE TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
FIELDDESC TYPE STRING,
SPRAS TYPE STRING,
DATERELEVANCE TYPE STRING,
DATATYPE TYPE STRING,
DEFTYPE TYPE STRING,
FILTER_DEF_IND TYPE STRING,
OUTPUTIND TYPE STRING,
DATERELVCONFIG TYPE STRING,
OUTPUTSEQ TYPE STRING,
FILTERDEFIND_TEXT TYPE STRING,
READONLY TYPE STRING,
INTTYPE TYPE STRING,
READONLY2 TYPE STRING,
PARAMETERNAME TYPE STRING,
MAPPING_RULEVAR TYPE STRING,
RULEVARSEQ TYPE STRING,
RULEVARTECH TYPE STRING,
DATATYPEDESC TYPE STRING,
INTTYPEDESC TYPE STRING,
READONLY3 TYPE STRING,
READONLY4 TYPE STRING,
READONLY5 TYPE STRING,
LOGFLAG TYPE STRING,
CREATEDON TYPE STRING,
CREATETIME TYPE STRING,
CREATEDBY TYPE STRING,
CHANGEDON TYPE STRING,
CHANGETIME TYPE STRING,
CHANGEDBY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GRPC_S_API_RLCR_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_RLCR_STR-RULEVAR_ID sy-vline 
WA_GRPC_S_API_RLCR_STR-RULEVAR sy-vline 
WA_GRPC_S_API_RLCR_STR-RULEVAR_DESC sy-vline 
WA_GRPC_S_API_RLCR_STR-SYSTEMTYPE sy-vline 
WA_GRPC_S_API_RLCR_STR-CONNECTOR sy-vline 
WA_GRPC_S_API_RLCR_STR-RLCRTYPE sy-vline 
WA_GRPC_S_API_RLCR_STR-RLCRTYPE_TXT sy-vline 
WA_GRPC_S_API_RLCR_STR-ISORGUNIT sy-vline 
WA_GRPC_S_API_RLCR_STR-ISORGUNIT_TXT sy-vline 
WA_GRPC_S_API_RLCR_STR-CREATED_BY_QUERY sy-vline 
WA_GRPC_S_API_RLCR_STR-VALUETYPE sy-vline 
WA_GRPC_S_API_RLCR_STR-TABNAME sy-vline 
WA_GRPC_S_API_RLCR_STR-FIELDNAME sy-vline 
WA_GRPC_S_API_RLCR_STR-FIELDDESC sy-vline 
WA_GRPC_S_API_RLCR_STR-SPRAS sy-vline 
WA_GRPC_S_API_RLCR_STR-DATERELEVANCE sy-vline 
WA_GRPC_S_API_RLCR_STR-DATATYPE sy-vline 
WA_GRPC_S_API_RLCR_STR-DEFTYPE sy-vline 
WA_GRPC_S_API_RLCR_STR-FILTER_DEF_IND sy-vline 
WA_GRPC_S_API_RLCR_STR-OUTPUTIND sy-vline 
WA_GRPC_S_API_RLCR_STR-DATERELVCONFIG sy-vline 
WA_GRPC_S_API_RLCR_STR-OUTPUTSEQ sy-vline 
WA_GRPC_S_API_RLCR_STR-FILTERDEFIND_TEXT sy-vline 
WA_GRPC_S_API_RLCR_STR-READONLY sy-vline 
WA_GRPC_S_API_RLCR_STR-INTTYPE sy-vline 
WA_GRPC_S_API_RLCR_STR-READONLY2 sy-vline 
WA_GRPC_S_API_RLCR_STR-PARAMETERNAME sy-vline 
WA_GRPC_S_API_RLCR_STR-MAPPING_RULEVAR sy-vline 
WA_GRPC_S_API_RLCR_STR-RULEVARSEQ sy-vline 
WA_GRPC_S_API_RLCR_STR-RULEVARTECH sy-vline 
WA_GRPC_S_API_RLCR_STR-DATATYPEDESC sy-vline 
WA_GRPC_S_API_RLCR_STR-INTTYPEDESC sy-vline 
WA_GRPC_S_API_RLCR_STR-READONLY3 sy-vline 
WA_GRPC_S_API_RLCR_STR-READONLY4 sy-vline 
WA_GRPC_S_API_RLCR_STR-READONLY5 sy-vline 
WA_GRPC_S_API_RLCR_STR-LOGFLAG sy-vline 
WA_GRPC_S_API_RLCR_STR-CREATEDON sy-vline 
WA_GRPC_S_API_RLCR_STR-CREATETIME sy-vline 
WA_GRPC_S_API_RLCR_STR-CREATEDBY sy-vline 
WA_GRPC_S_API_RLCR_STR-CHANGEDON sy-vline 
WA_GRPC_S_API_RLCR_STR-CHANGETIME sy-vline 
WA_GRPC_S_API_RLCR_STR-CHANGEDBY sy-vline      INTO ld_text SEPARATED BY SPACE.

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