ABAP Select data from SAP table RCF_S_SE_POSTING 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_SE_POSTING 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_SE_POSTING. 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_SE_POSTING 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_SE_POSTING TYPE STANDARD TABLE OF RCF_S_SE_POSTING,
      WA_RCF_S_SE_POSTING TYPE RCF_S_SE_POSTING,
      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_SE_POSTING> TYPE RCF_S_SE_POSTING.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCF_S_SE_POSTING
*  INTO TABLE @DATA(IT_RCF_S_SE_POSTING2).
*--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_SE_POSTING INDEX 1 INTO DATA(WA_RCF_S_SE_POSTING2).


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

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

ENDLOOP.

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

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


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

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

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

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

*Conversion exit ISOLA, internal->external for field DOC_LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RCF_S_SE_POSTING-DOC_LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCF_S_SE_POSTING-DOC_LANGU.
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_SE_POSTING_STR, 
POSTING_ID 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,
POSTING_NAME TYPE STRING,
DESCRIPTION TYPE STRING,
DOC_LANGU TYPE STRING,
LANGU_TAB TYPE STRING,
POSTING_URI TYPE STRING,
COMPANY_TEXT TYPE STRING,
DESCRIPTION TYPE STRING,
DOC_LANGU TYPE STRING,
LANGU_TAB TYPE STRING,
PROJECT_TEXT TYPE STRING,
DESCRIPTION TYPE STRING,
DOC_LANGU TYPE STRING,
LANGU_TAB TYPE STRING,
TASK_TEXT TYPE STRING,
DESCRIPTION TYPE STRING,
DOC_LANGU TYPE STRING,
LANGU_TAB TYPE STRING,
REQUIREMENT_TEXT TYPE STRING,
DESCRIPTION TYPE STRING,
DOC_LANGU TYPE STRING,
LANGU_TAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCF_S_SE_POSTING_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_SE_POSTING_STR-POSTING_ID sy-vline 
WA_RCF_S_SE_POSTING_STR-MANDT sy-vline 
WA_RCF_S_SE_POSTING_STR-PLVAR sy-vline 
WA_RCF_S_SE_POSTING_STR-OTYPE sy-vline 
WA_RCF_S_SE_POSTING_STR-OBJID sy-vline 
WA_RCF_S_SE_POSTING_STR-SUBTY sy-vline 
WA_RCF_S_SE_POSTING_STR-ISTAT sy-vline 
WA_RCF_S_SE_POSTING_STR-BEGDA sy-vline 
WA_RCF_S_SE_POSTING_STR-ENDDA sy-vline 
WA_RCF_S_SE_POSTING_STR-VARYF sy-vline 
WA_RCF_S_SE_POSTING_STR-SEQNR sy-vline 
WA_RCF_S_SE_POSTING_STR-POSTING_NAME sy-vline 
WA_RCF_S_SE_POSTING_STR-DESCRIPTION sy-vline 
WA_RCF_S_SE_POSTING_STR-DOC_LANGU sy-vline 
WA_RCF_S_SE_POSTING_STR-LANGU_TAB sy-vline 
WA_RCF_S_SE_POSTING_STR-POSTING_URI sy-vline 
WA_RCF_S_SE_POSTING_STR-COMPANY_TEXT sy-vline 
WA_RCF_S_SE_POSTING_STR-DESCRIPTION sy-vline 
WA_RCF_S_SE_POSTING_STR-DOC_LANGU sy-vline 
WA_RCF_S_SE_POSTING_STR-LANGU_TAB sy-vline 
WA_RCF_S_SE_POSTING_STR-PROJECT_TEXT sy-vline 
WA_RCF_S_SE_POSTING_STR-DESCRIPTION sy-vline 
WA_RCF_S_SE_POSTING_STR-DOC_LANGU sy-vline 
WA_RCF_S_SE_POSTING_STR-LANGU_TAB sy-vline 
WA_RCF_S_SE_POSTING_STR-TASK_TEXT sy-vline 
WA_RCF_S_SE_POSTING_STR-DESCRIPTION sy-vline 
WA_RCF_S_SE_POSTING_STR-DOC_LANGU sy-vline 
WA_RCF_S_SE_POSTING_STR-LANGU_TAB sy-vline 
WA_RCF_S_SE_POSTING_STR-REQUIREMENT_TEXT sy-vline 
WA_RCF_S_SE_POSTING_STR-DESCRIPTION sy-vline 
WA_RCF_S_SE_POSTING_STR-DOC_LANGU sy-vline 
WA_RCF_S_SE_POSTING_STR-LANGU_TAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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