ABAP Select data from SAP table RPCLSTPC_ALV_2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RPCLSTPC_ALV_2 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 RPCLSTPC_ALV_2. 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 RPCLSTPC_ALV_2 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_RPCLSTPC_ALV_2 TYPE STANDARD TABLE OF RPCLSTPC_ALV_2,
      WA_RPCLSTPC_ALV_2 TYPE RPCLSTPC_ALV_2,
      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: <RPCLSTPC_ALV_2> TYPE RPCLSTPC_ALV_2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RPCLSTPC_ALV_2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RPCLSTPC_ALV_2
  INTO TABLE IT_RPCLSTPC_ALV_2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPCLSTPC_ALV_2
*  INTO TABLE @DATA(IT_RPCLSTPC_ALV_22).
*--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_RPCLSTPC_ALV_2 INDEX 1 INTO DATA(WA_RPCLSTPC_ALV_22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RPCLSTPC_ALV_2 ASSIGNING <RPCLSTPC_ALV_2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPCLSTPC_ALV_2>-MONTH_KTX = 1.
<RPCLSTPC_ALV_2>-DAY01 = 1.
<RPCLSTPC_ALV_2>-DAY02 = 1.
<RPCLSTPC_ALV_2>-DAY03 = 1.
<RPCLSTPC_ALV_2>-DAY04 = 1.

ENDLOOP.

LOOP AT IT_RPCLSTPC_ALV_2 INTO WA_RPCLSTPC_ALV_2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPCLSTPC_ALV_2-DAY05, sy-vline,
  WA_RPCLSTPC_ALV_2-DAY06, sy-vline,
  WA_RPCLSTPC_ALV_2-DAY07, sy-vline,
  WA_RPCLSTPC_ALV_2-DAY08, sy-vline,
  WA_RPCLSTPC_ALV_2-DAY09, sy-vline,
  WA_RPCLSTPC_ALV_2-DAY10, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPCLSTPC_ALV_2 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_RPCLSTPC_ALV_2 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_RPCLSTPC_ALV_2 INTO WA_RPCLSTPC_ALV_2.


*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_RPCLSTPC_ALV_2_STR, 
MONTH_KTX TYPE STRING,
DAY01 TYPE STRING,
DAY02 TYPE STRING,
DAY03 TYPE STRING,
DAY04 TYPE STRING,
DAY05 TYPE STRING,
DAY06 TYPE STRING,
DAY07 TYPE STRING,
DAY08 TYPE STRING,
DAY09 TYPE STRING,
DAY10 TYPE STRING,
DAY11 TYPE STRING,
DAY12 TYPE STRING,
DAY13 TYPE STRING,
DAY14 TYPE STRING,
DAY15 TYPE STRING,
DAY16 TYPE STRING,
DAY17 TYPE STRING,
DAY18 TYPE STRING,
DAY19 TYPE STRING,
DAY20 TYPE STRING,
DAY21 TYPE STRING,
DAY22 TYPE STRING,
DAY23 TYPE STRING,
DAY24 TYPE STRING,
DAY25 TYPE STRING,
DAY26 TYPE STRING,
DAY27 TYPE STRING,
DAY28 TYPE STRING,
DAY29 TYPE STRING,
DAY30 TYPE STRING,
DAY31 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPCLSTPC_ALV_2_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_RPCLSTPC_ALV_2_STR-MONTH_KTX sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY01 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY02 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY03 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY04 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY05 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY06 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY07 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY08 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY09 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY10 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY11 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY12 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY13 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY14 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY15 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY16 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY17 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY18 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY19 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY20 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY21 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY22 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY23 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY24 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY25 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY26 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY27 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY28 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY29 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY30 sy-vline 
WA_RPCLSTPC_ALV_2_STR-DAY31 sy-vline      INTO ld_text SEPARATED BY SPACE.

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