ABAP Select data from SAP table CRHD_API08 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CRHD_API08 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 CRHD_API08. 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 CRHD_API08 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_CRHD_API08 TYPE STANDARD TABLE OF CRHD_API08,
      WA_CRHD_API08 TYPE CRHD_API08,
      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: <CRHD_API08> TYPE CRHD_API08.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CRHD_API08.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CRHD_API08
  INTO TABLE IT_CRHD_API08.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRHD_API08
*  INTO TABLE @DATA(IT_CRHD_API082).
*--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_CRHD_API08 INDEX 1 INTO DATA(WA_CRHD_API082).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CRHD_API08 ASSIGNING <CRHD_API08>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRHD_API08>-PAR01 = 1.
<CRHD_API08>-PAR02 = 1.
<CRHD_API08>-PAR03 = 1.
<CRHD_API08>-PAR04 = 1.
<CRHD_API08>-PAR05 = 1.

ENDLOOP.

LOOP AT IT_CRHD_API08 INTO WA_CRHD_API08.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRHD_API08-PAR06, sy-vline,
  WA_CRHD_API08-PARU1, sy-vline,
  WA_CRHD_API08-PARU2, sy-vline,
  WA_CRHD_API08-PARU3, sy-vline,
  WA_CRHD_API08-PARU4, sy-vline,
  WA_CRHD_API08-PARU5, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRHD_API08 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_CRHD_API08 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_CRHD_API08 INTO WA_CRHD_API08.


*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 CUNIT, internal->external for field PARU1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRHD_API08-PARU1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRHD_API08-PARU1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PARU2
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRHD_API08-PARU2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRHD_API08-PARU2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PARU3
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRHD_API08-PARU3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRHD_API08-PARU3.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PARU4
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRHD_API08-PARU4
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRHD_API08-PARU4.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PARU5
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRHD_API08-PARU5
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRHD_API08-PARU5.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PARU6
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRHD_API08-PARU6
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRHD_API08-PARU6.
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_CRHD_API08_STR, 
PAR01 TYPE STRING,
PAR02 TYPE STRING,
PAR03 TYPE STRING,
PAR04 TYPE STRING,
PAR05 TYPE STRING,
PAR06 TYPE STRING,
PARU1 TYPE STRING,
PARU2 TYPE STRING,
PARU3 TYPE STRING,
PARU4 TYPE STRING,
PARU5 TYPE STRING,
PARU6 TYPE STRING,
PARV1 TYPE STRING,
PARV2 TYPE STRING,
PARV3 TYPE STRING,
PARV4 TYPE STRING,
PARV5 TYPE STRING,
PARV6 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRHD_API08_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_CRHD_API08_STR-PAR01 sy-vline 
WA_CRHD_API08_STR-PAR02 sy-vline 
WA_CRHD_API08_STR-PAR03 sy-vline 
WA_CRHD_API08_STR-PAR04 sy-vline 
WA_CRHD_API08_STR-PAR05 sy-vline 
WA_CRHD_API08_STR-PAR06 sy-vline 
WA_CRHD_API08_STR-PARU1 sy-vline 
WA_CRHD_API08_STR-PARU2 sy-vline 
WA_CRHD_API08_STR-PARU3 sy-vline 
WA_CRHD_API08_STR-PARU4 sy-vline 
WA_CRHD_API08_STR-PARU5 sy-vline 
WA_CRHD_API08_STR-PARU6 sy-vline 
WA_CRHD_API08_STR-PARV1 sy-vline 
WA_CRHD_API08_STR-PARV2 sy-vline 
WA_CRHD_API08_STR-PARV3 sy-vline 
WA_CRHD_API08_STR-PARV4 sy-vline 
WA_CRHD_API08_STR-PARV5 sy-vline 
WA_CRHD_API08_STR-PARV6 sy-vline      INTO ld_text SEPARATED BY SPACE.

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