ABAP Select data from SAP table RPCROEK0_GENERATOR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RPCROEK0_GENERATOR 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 RPCROEK0_GENERATOR. 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 RPCROEK0_GENERATOR 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_RPCROEK0_GENERATOR TYPE STANDARD TABLE OF RPCROEK0_GENERATOR,
      WA_RPCROEK0_GENERATOR TYPE RPCROEK0_GENERATOR,
      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: <RPCROEK0_GENERATOR> TYPE RPCROEK0_GENERATOR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RPCROEK0_GENERATOR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RPCROEK0_GENERATOR
  INTO TABLE IT_RPCROEK0_GENERATOR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPCROEK0_GENERATOR
*  INTO TABLE @DATA(IT_RPCROEK0_GENERATOR2).
*--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_RPCROEK0_GENERATOR INDEX 1 INTO DATA(WA_RPCROEK0_GENERATOR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RPCROEK0_GENERATOR ASSIGNING <RPCROEK0_GENERATOR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPCROEK0_GENERATOR>-P_RUNDT = 1.
<RPCROEK0_GENERATOR>-P_NEW = 1.
<RPCROEK0_GENERATOR>-P_AMEND = 1.
<RPCROEK0_GENERATOR>-P_TEST = 1.
<RPCROEK0_GENERATOR>-P_ROERS = 1.

ENDLOOP.

LOOP AT IT_RPCROEK0_GENERATOR INTO WA_RPCROEK0_GENERATOR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPCROEK0_GENERATOR-P_FSTDT, sy-vline,
  WA_RPCROEK0_GENERATOR-P_LSTDT, sy-vline,
  WA_RPCROEK0_GENERATOR-P_RCLCD1, sy-vline,
  WA_RPCROEK0_GENERATOR-P_RCLCD2, sy-vline,
  WA_RPCROEK0_GENERATOR-P_RCLCD3, sy-vline,
  WA_RPCROEK0_GENERATOR-P_RCLCD4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPCROEK0_GENERATOR 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_RPCROEK0_GENERATOR 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_RPCROEK0_GENERATOR INTO WA_RPCROEK0_GENERATOR.


*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_RPCROEK0_GENERATOR_STR, 
P_RUNDT TYPE STRING,
P_NEW TYPE STRING,
P_AMEND TYPE STRING,
P_TEST TYPE STRING,
P_ROERS TYPE STRING,
P_FSTDT TYPE STRING,
P_LSTDT TYPE STRING,
P_RCLCD1 TYPE STRING,
P_RCLCD2 TYPE STRING,
P_RCLCD3 TYPE STRING,
P_RCLCD4 TYPE STRING,
P_RCLDT TYPE STRING,
P_CTOPT1 TYPE STRING,
P_CTOPT2 TYPE STRING,
P_CTOPT3 TYPE STRING,
P_CTNAME TYPE STRING,
P_CTAREA TYPE STRING,
P_CTTEL TYPE STRING,
P_CTEXT TYPE STRING,
P_WTAPPL TYPE STRING,
P_COOPT1 TYPE STRING,
P_COOPT2 TYPE STRING,
P_SUBTY TYPE STRING,
P_COMM1 TYPE STRING,
P_COMM2 TYPE STRING,
P_COMM3 TYPE STRING,
P_COMM4 TYPE STRING,
P_PMTDT TYPE STRING,
P_PMTAM TYPE STRING,
P_PMTPER TYPE STRING,
P_CLANG TYPE STRING,
P_ISOPT1 TYPE STRING,
P_ISOPT2 TYPE STRING,
P_ISOPT3 TYPE STRING,
P_ISNAME TYPE STRING,
P_ISAREA TYPE STRING,
P_ISTEL TYPE STRING,
P_ISEXT TYPE STRING,
P_LGSALL TYPE STRING,
P_LGVAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPCROEK0_GENERATOR_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_RPCROEK0_GENERATOR_STR-P_RUNDT sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_NEW sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_AMEND sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_TEST sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_ROERS sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_FSTDT sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_LSTDT sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_RCLCD1 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_RCLCD2 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_RCLCD3 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_RCLCD4 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_RCLDT sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_CTOPT1 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_CTOPT2 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_CTOPT3 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_CTNAME sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_CTAREA sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_CTTEL sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_CTEXT sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_WTAPPL sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_COOPT1 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_COOPT2 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_SUBTY sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_COMM1 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_COMM2 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_COMM3 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_COMM4 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_PMTDT sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_PMTAM sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_PMTPER sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_CLANG sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_ISOPT1 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_ISOPT2 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_ISOPT3 sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_ISNAME sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_ISAREA sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_ISTEL sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_ISEXT sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_LGSALL sy-vline 
WA_RPCROEK0_GENERATOR_STR-P_LGVAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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