ABAP Select data from SAP table CRHD_API03 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CRHD_API03 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_API03. 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_API03 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_API03 TYPE STANDARD TABLE OF CRHD_API03,
      WA_CRHD_API03 TYPE CRHD_API03,
      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_API03> TYPE CRHD_API03.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CRHD_API03.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CRHD_API03
  INTO TABLE IT_CRHD_API03.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRHD_API03
*  INTO TABLE @DATA(IT_CRHD_API032).
*--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_API03 INDEX 1 INTO DATA(WA_CRHD_API032).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CRHD_API03 ASSIGNING <CRHD_API03>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRHD_API03>-KTSCH = 1.
<CRHD_API03>-LOANZ = 1.
<CRHD_API03>-LOART = 1.
<CRHD_API03>-LOGRP = 1.
<CRHD_API03>-QUALF = 1.

ENDLOOP.

LOOP AT IT_CRHD_API03 INTO WA_CRHD_API03.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRHD_API03-RASCH, sy-vline,
  WA_CRHD_API03-STEUS, sy-vline,
  WA_CRHD_API03-VGE01, sy-vline,
  WA_CRHD_API03-VGE02, sy-vline,
  WA_CRHD_API03-VGE03, sy-vline,
  WA_CRHD_API03-VGE04, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRHD_API03 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_API03 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_API03 INTO WA_CRHD_API03.


*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 VGE01
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRHD_API03-VGE01
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRHD_API03-VGE01.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VGE02
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRHD_API03-VGE02
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRHD_API03-VGE02.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VGE03
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRHD_API03-VGE03
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRHD_API03-VGE03.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VGE04
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRHD_API03-VGE04
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRHD_API03-VGE04.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VGE05
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRHD_API03-VGE05
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRHD_API03-VGE05.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VGE06
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRHD_API03-VGE06
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRHD_API03-VGE06.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SPDEV, internal->external for field PDEST
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_CRHD_API03-PDEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRHD_API03-PDEST.
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_API03_STR, 
KTSCH TYPE STRING,
LOANZ TYPE STRING,
LOART TYPE STRING,
LOGRP TYPE STRING,
QUALF TYPE STRING,
RASCH TYPE STRING,
STEUS TYPE STRING,
VGE01 TYPE STRING,
VGE02 TYPE STRING,
VGE03 TYPE STRING,
VGE04 TYPE STRING,
VGE05 TYPE STRING,
VGE06 TYPE STRING,
KTSCH_REF TYPE STRING,
LOART_REF TYPE STRING,
LOANZ_REF TYPE STRING,
LOGRP_REF TYPE STRING,
QUALF_REF TYPE STRING,
RASCH_REF TYPE STRING,
STEUS_REF TYPE STRING,
RSANZ TYPE STRING,
PDEST TYPE STRING,
RSANZ_REF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRHD_API03_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_API03_STR-KTSCH sy-vline 
WA_CRHD_API03_STR-LOANZ sy-vline 
WA_CRHD_API03_STR-LOART sy-vline 
WA_CRHD_API03_STR-LOGRP sy-vline 
WA_CRHD_API03_STR-QUALF sy-vline 
WA_CRHD_API03_STR-RASCH sy-vline 
WA_CRHD_API03_STR-STEUS sy-vline 
WA_CRHD_API03_STR-VGE01 sy-vline 
WA_CRHD_API03_STR-VGE02 sy-vline 
WA_CRHD_API03_STR-VGE03 sy-vline 
WA_CRHD_API03_STR-VGE04 sy-vline 
WA_CRHD_API03_STR-VGE05 sy-vline 
WA_CRHD_API03_STR-VGE06 sy-vline 
WA_CRHD_API03_STR-KTSCH_REF sy-vline 
WA_CRHD_API03_STR-LOART_REF sy-vline 
WA_CRHD_API03_STR-LOANZ_REF sy-vline 
WA_CRHD_API03_STR-LOGRP_REF sy-vline 
WA_CRHD_API03_STR-QUALF_REF sy-vline 
WA_CRHD_API03_STR-RASCH_REF sy-vline 
WA_CRHD_API03_STR-STEUS_REF sy-vline 
WA_CRHD_API03_STR-RSANZ sy-vline 
WA_CRHD_API03_STR-PDEST sy-vline 
WA_CRHD_API03_STR-RSANZ_REF sy-vline      INTO ld_text SEPARATED BY SPACE.

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