ABAP Select data from SAP table ERCHZ_I3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ERCHZ_I3 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 ERCHZ_I3. 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 ERCHZ_I3 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_ERCHZ_I3 TYPE STANDARD TABLE OF ERCHZ_I3,
      WA_ERCHZ_I3 TYPE ERCHZ_I3,
      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: <ERCHZ_I3> TYPE ERCHZ_I3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ERCHZ_I3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ERCHZ_I3
  INTO TABLE IT_ERCHZ_I3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ERCHZ_I3
*  INTO TABLE @DATA(IT_ERCHZ_I32).
*--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_ERCHZ_I3 INDEX 1 INTO DATA(WA_ERCHZ_I32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ERCHZ_I3 ASSIGNING <ERCHZ_I3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ERCHZ_I3>-MWSKZ = 1.
<ERCHZ_I3>-ERMWSKZ = 1.
<ERCHZ_I3>-NETTOBTR = 1.
<ERCHZ_I3>-TWAERS = 1.
<ERCHZ_I3>-PREISTUF = 1.

ENDLOOP.

LOOP AT IT_ERCHZ_I3 INTO WA_ERCHZ_I3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ERCHZ_I3-PREISTYP, sy-vline,
  WA_ERCHZ_I3-PREIS, sy-vline,
  WA_ERCHZ_I3-PREISZUS, sy-vline,
  WA_ERCHZ_I3-VONZONE, sy-vline,
  WA_ERCHZ_I3-BISZONE, sy-vline,
  WA_ERCHZ_I3-ZONENNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ERCHZ_I3 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_ERCHZ_I3 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_ERCHZ_I3 INTO WA_ERCHZ_I3.


*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 PREIS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ERCHZ_I3-PREIS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHZ_I3-PREIS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ERCHZ_I3-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHZ_I3-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ERCHZ_I3-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHZ_I3-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_ERCHZ_I3-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHZ_I3-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ERCHZ_I3-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHZ_I3-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SEGMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ERCHZ_I3-SEGMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHZ_I3-SEGMENT.
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_ERCHZ_I3_STR, 
MWSKZ TYPE STRING,
ERMWSKZ TYPE STRING,
NETTOBTR TYPE STRING,
TWAERS TYPE STRING,
PREISTUF TYPE STRING,
PREISTYP TYPE STRING,
PREIS TYPE STRING,
PREISZUS TYPE STRING,
VONZONE TYPE STRING,
BISZONE TYPE STRING,
ZONENNR TYPE STRING,
PREISBTR TYPE STRING,
MNGBASIS TYPE STRING,
PREIGKL TYPE STRING,
URPREIS TYPE STRING,
PREIADD TYPE STRING,
PREIFAKT TYPE STRING,
OPMULT TYPE STRING,
TXDAT_KK TYPE STRING,
PRCTR TYPE STRING,
KOSTL TYPE STRING,
PS_PSP_PNR TYPE STRING,
AUFNR TYPE STRING,
PAOBJNR TYPE STRING,
PAOBJNR_S TYPE STRING,
GSBER TYPE STRING,
APERIODIC TYPE STRING,
GROSSGROUP TYPE STRING,
BRUTTOZEILE TYPE STRING,
BUPLA TYPE STRING,
LINE_CLASS TYPE STRING,
PREISART TYPE STRING,
SEGMENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ERCHZ_I3_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_ERCHZ_I3_STR-MWSKZ sy-vline 
WA_ERCHZ_I3_STR-ERMWSKZ sy-vline 
WA_ERCHZ_I3_STR-NETTOBTR sy-vline 
WA_ERCHZ_I3_STR-TWAERS sy-vline 
WA_ERCHZ_I3_STR-PREISTUF sy-vline 
WA_ERCHZ_I3_STR-PREISTYP sy-vline 
WA_ERCHZ_I3_STR-PREIS sy-vline 
WA_ERCHZ_I3_STR-PREISZUS sy-vline 
WA_ERCHZ_I3_STR-VONZONE sy-vline 
WA_ERCHZ_I3_STR-BISZONE sy-vline 
WA_ERCHZ_I3_STR-ZONENNR sy-vline 
WA_ERCHZ_I3_STR-PREISBTR sy-vline 
WA_ERCHZ_I3_STR-MNGBASIS sy-vline 
WA_ERCHZ_I3_STR-PREIGKL sy-vline 
WA_ERCHZ_I3_STR-URPREIS sy-vline 
WA_ERCHZ_I3_STR-PREIADD sy-vline 
WA_ERCHZ_I3_STR-PREIFAKT sy-vline 
WA_ERCHZ_I3_STR-OPMULT sy-vline 
WA_ERCHZ_I3_STR-TXDAT_KK sy-vline 
WA_ERCHZ_I3_STR-PRCTR sy-vline 
WA_ERCHZ_I3_STR-KOSTL sy-vline 
WA_ERCHZ_I3_STR-PS_PSP_PNR sy-vline 
WA_ERCHZ_I3_STR-AUFNR sy-vline 
WA_ERCHZ_I3_STR-PAOBJNR sy-vline 
WA_ERCHZ_I3_STR-PAOBJNR_S sy-vline 
WA_ERCHZ_I3_STR-GSBER sy-vline 
WA_ERCHZ_I3_STR-APERIODIC sy-vline 
WA_ERCHZ_I3_STR-GROSSGROUP sy-vline 
WA_ERCHZ_I3_STR-BRUTTOZEILE sy-vline 
WA_ERCHZ_I3_STR-BUPLA sy-vline 
WA_ERCHZ_I3_STR-LINE_CLASS sy-vline 
WA_ERCHZ_I3_STR-PREISART sy-vline 
WA_ERCHZ_I3_STR-SEGMENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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