ABAP Select data from SAP table FMZUCH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMZUCH
*  INTO TABLE @DATA(IT_FMZUCH2).
*--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_FMZUCH INDEX 1 INTO DATA(WA_FMZUCH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMZUCH>-MANDT = 1.
<FMZUCH>-OBJNR = 1.
<FMZUCH>-KSTAR = 1.
<FMZUCH>-ABGJR = 1.
<FMZUCH>-KOKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMZUCH-CPUDT, sy-vline,
  WA_FMZUCH-CPUTM, sy-vline,
  WA_FMZUCH-BSGJR, sy-vline,
  WA_FMZUCH-FIKRS, sy-vline,
  WA_FMZUCH-FIPOS, sy-vline,
  WA_FMZUCH-FISTL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMZUCH 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_FMZUCH 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_FMZUCH INTO WA_FMZUCH.


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

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

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

*Conversion exit FMCIS, internal->external for field FIPOS
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_FMZUCH-FIPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMZUCH-FIPOS.
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_FMZUCH_STR, 
MANDT TYPE STRING,
OBJNR TYPE STRING,
KSTAR TYPE STRING,
ABGJR TYPE STRING,
KOKRS TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
BSGJR TYPE STRING,
FIKRS TYPE STRING,
FIPOS TYPE STRING,
FISTL TYPE STRING,
FONDS TYPE STRING,
CPUDTSEL TYPE STRING,
CPUTMSEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMZUCH_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_FMZUCH_STR-MANDT sy-vline 
WA_FMZUCH_STR-OBJNR sy-vline 
WA_FMZUCH_STR-KSTAR sy-vline 
WA_FMZUCH_STR-ABGJR sy-vline 
WA_FMZUCH_STR-KOKRS sy-vline 
WA_FMZUCH_STR-CPUDT sy-vline 
WA_FMZUCH_STR-CPUTM sy-vline 
WA_FMZUCH_STR-BSGJR sy-vline 
WA_FMZUCH_STR-FIKRS sy-vline 
WA_FMZUCH_STR-FIPOS sy-vline 
WA_FMZUCH_STR-FISTL sy-vline 
WA_FMZUCH_STR-FONDS sy-vline 
WA_FMZUCH_STR-CPUDTSEL sy-vline 
WA_FMZUCH_STR-CPUTMSEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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