ABAP Select data from SAP table ICRCZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICRCZ
*  INTO TABLE @DATA(IT_ICRCZ2).
*--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_ICRCZ INDEX 1 INTO DATA(WA_ICRCZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICRCZ>-MANDT = 1.
<ICRCZ>-RCOMP = 1.
<ICRCZ>-VBUND = 1.
<ICRCZ>-BUKRS = 1.
<ICRCZ>-BELNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICRCZ-GJAHR, sy-vline,
  WA_ICRCZ-BUZEI, sy-vline,
  WA_ICRCZ-XBLNR, sy-vline,
  WA_ICRCZ-UMSKZ, sy-vline,
  WA_ICRCZ-KOART, sy-vline,
  WA_ICRCZ-KUNNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICRCZ 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_ICRCZ 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_ICRCZ INTO WA_ICRCZ.


*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 RCOMP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICRCZ-RCOMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICRCZ-RCOMP.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit AU132, internal->external for field WRBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_ICRCZ-WRBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICRCZ-WRBTR.
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_ICRCZ_STR, 
MANDT TYPE STRING,
RCOMP TYPE STRING,
VBUND TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
XBLNR TYPE STRING,
UMSKZ TYPE STRING,
KOART TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
SHKZG TYPE STRING,
WRBTR TYPE STRING,
WAERS TYPE STRING,
BLART TYPE STRING,
BSCHL TYPE STRING,
FDNAM TYPE STRING,
FDCON TYPE STRING,
STATUS TYPE STRING,
ZSTAT TYPE STRING,
REFNR TYPE STRING,
REFDT TYPE STRING,
UNAME TYPE STRING,
XWBAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICRCZ_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_ICRCZ_STR-MANDT sy-vline 
WA_ICRCZ_STR-RCOMP sy-vline 
WA_ICRCZ_STR-VBUND sy-vline 
WA_ICRCZ_STR-BUKRS sy-vline 
WA_ICRCZ_STR-BELNR sy-vline 
WA_ICRCZ_STR-GJAHR sy-vline 
WA_ICRCZ_STR-BUZEI sy-vline 
WA_ICRCZ_STR-XBLNR sy-vline 
WA_ICRCZ_STR-UMSKZ sy-vline 
WA_ICRCZ_STR-KOART sy-vline 
WA_ICRCZ_STR-KUNNR sy-vline 
WA_ICRCZ_STR-LIFNR sy-vline 
WA_ICRCZ_STR-BUDAT sy-vline 
WA_ICRCZ_STR-BLDAT sy-vline 
WA_ICRCZ_STR-SHKZG sy-vline 
WA_ICRCZ_STR-WRBTR sy-vline 
WA_ICRCZ_STR-WAERS sy-vline 
WA_ICRCZ_STR-BLART sy-vline 
WA_ICRCZ_STR-BSCHL sy-vline 
WA_ICRCZ_STR-FDNAM sy-vline 
WA_ICRCZ_STR-FDCON sy-vline 
WA_ICRCZ_STR-STATUS sy-vline 
WA_ICRCZ_STR-ZSTAT sy-vline 
WA_ICRCZ_STR-REFNR sy-vline 
WA_ICRCZ_STR-REFDT sy-vline 
WA_ICRCZ_STR-UNAME sy-vline 
WA_ICRCZ_STR-XWBAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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