ABAP Select data from SAP table RIHCLDA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RIHCLDA
*  INTO TABLE @DATA(IT_RIHCLDA2).
*--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_RIHCLDA INDEX 1 INTO DATA(WA_RIHCLDA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RIHCLDA>-POSNR = 1.
<RIHCLDA>-SMBEZ = 1.
<RIHCLDA>-ZAEHL = 1.
<RIHCLDA>-OPER1 = 1.
<RIHCLDA>-AUSP1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RIHCLDA-DIME1, sy-vline,
  WA_RIHCLDA-ATNAM, sy-vline,
  WA_RIHCLDA-EQUNR, sy-vline,
  WA_RIHCLDA-TPLNR, sy-vline,
  WA_RIHCLDA-QMNUM, sy-vline,
  WA_RIHCLDA-FENUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RIHCLDA 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_RIHCLDA 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_RIHCLDA INTO WA_RIHCLDA.


*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 ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RIHCLDA-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RIHCLDA-EQUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_RIHCLDA-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RIHCLDA-TPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field QMNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RIHCLDA-QMNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RIHCLDA-QMNUM.
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_RIHCLDA_STR, 
POSNR TYPE STRING,
SMBEZ TYPE STRING,
ZAEHL TYPE STRING,
OPER1 TYPE STRING,
AUSP1 TYPE STRING,
DIME1 TYPE STRING,
ATNAM TYPE STRING,
EQUNR TYPE STRING,
TPLNR TYPE STRING,
QMNUM TYPE STRING,
FENUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RIHCLDA_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_RIHCLDA_STR-POSNR sy-vline 
WA_RIHCLDA_STR-SMBEZ sy-vline 
WA_RIHCLDA_STR-ZAEHL sy-vline 
WA_RIHCLDA_STR-OPER1 sy-vline 
WA_RIHCLDA_STR-AUSP1 sy-vline 
WA_RIHCLDA_STR-DIME1 sy-vline 
WA_RIHCLDA_STR-ATNAM sy-vline 
WA_RIHCLDA_STR-EQUNR sy-vline 
WA_RIHCLDA_STR-TPLNR sy-vline 
WA_RIHCLDA_STR-QMNUM sy-vline 
WA_RIHCLDA_STR-FENUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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