ABAP Select data from SAP table RCF_S_ERC_APP_E_ATT_VAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCF_S_ERC_APP_E_ATT_VAR
*  INTO TABLE @DATA(IT_RCF_S_ERC_APP_E_ATT_VAR2).
*--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_RCF_S_ERC_APP_E_ATT_VAR INDEX 1 INTO DATA(WA_RCF_S_ERC_APP_E_ATT_VAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCF_S_ERC_APP_E_ATT_VAR>-HRIKEY = 1.
<RCF_S_ERC_APP_E_ATT_VAR>-MANDT = 1.
<RCF_S_ERC_APP_E_ATT_VAR>-PLVAR = 1.
<RCF_S_ERC_APP_E_ATT_VAR>-OTYPE = 1.
<RCF_S_ERC_APP_E_ATT_VAR>-OBJID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCF_S_ERC_APP_E_ATT_VAR-SUBTY, sy-vline,
  WA_RCF_S_ERC_APP_E_ATT_VAR-ISTAT, sy-vline,
  WA_RCF_S_ERC_APP_E_ATT_VAR-BEGDA, sy-vline,
  WA_RCF_S_ERC_APP_E_ATT_VAR-ENDDA, sy-vline,
  WA_RCF_S_ERC_APP_E_ATT_VAR-VARYF, sy-vline,
  WA_RCF_S_ERC_APP_E_ATT_VAR-SEQNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCF_S_ERC_APP_E_ATT_VAR 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_RCF_S_ERC_APP_E_ATT_VAR 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_RCF_S_ERC_APP_E_ATT_VAR INTO WA_RCF_S_ERC_APP_E_ATT_VAR.


*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 LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RCF_S_ERC_APP_E_ATT_VAR-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCF_S_ERC_APP_E_ATT_VAR-LANGUAGE.
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_RCF_S_ERC_APP_E_ATT_VAR_STR, 
HRIKEY TYPE STRING,
MANDT TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
SUBTY TYPE STRING,
ISTAT TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
VARYF TYPE STRING,
SEQNR TYPE STRING,
ATTACHMENT_TYPE TYPE STRING,
ATT_TYPE_TXT TYPE STRING,
LANGUAGE TYPE STRING,
LANGUAGE_TXT TYPE STRING,
ATTACHMENT_HEADER TYPE STRING,
FILENAME TYPE STRING,
CONTENTS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCF_S_ERC_APP_E_ATT_VAR_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_RCF_S_ERC_APP_E_ATT_VAR_STR-HRIKEY sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-MANDT sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-PLVAR sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-OTYPE sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-OBJID sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-SUBTY sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-ISTAT sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-BEGDA sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-ENDDA sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-VARYF sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-SEQNR sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-ATTACHMENT_TYPE sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-ATT_TYPE_TXT sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-LANGUAGE sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-LANGUAGE_TXT sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-ATTACHMENT_HEADER sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-FILENAME sy-vline 
WA_RCF_S_ERC_APP_E_ATT_VAR_STR-CONTENTS sy-vline      INTO ld_text SEPARATED BY SPACE.

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