ABAP Select data from SAP table ERCHOD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ERCHOD
*  INTO TABLE @DATA(IT_ERCHOD2).
*--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_ERCHOD INDEX 1 INTO DATA(WA_ERCHOD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ERCHOD>-BELNR = 1.
<ERCHOD>-GPARTNER = 1.
<ERCHOD>-BPINFO = 1.
<ERCHOD>-VKONT = 1.
<ERCHOD>-VERTRAG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ERCHOD-PORTION, sy-vline,
  WA_ERCHOD-VALIDATION, sy-vline,
  WA_ERCHOD-MANOUTSORT, sy-vline,
  WA_ERCHOD-FREI_AM, sy-vline,
  WA_ERCHOD-FREI_VON, sy-vline,
  WA_ERCHOD-DEVIATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ERCHOD 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_ERCHOD 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_ERCHOD INTO WA_ERCHOD.


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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field BILLINGRUNNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ERCHOD-BILLINGRUNNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHOD-BILLINGRUNNO.
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_ERCHOD_STR, 
BELNR TYPE STRING,
GPARTNER TYPE STRING,
BPINFO TYPE STRING,
VKONT TYPE STRING,
VERTRAG TYPE STRING,
PORTION TYPE STRING,
VALIDATION TYPE STRING,
MANOUTSORT TYPE STRING,
FREI_AM TYPE STRING,
FREI_VON TYPE STRING,
DEVIATION TYPE STRING,
SIMULATION TYPE STRING,
OUTCOUNT TYPE STRING,
STORNODAT TYPE STRING,
SIMULATED TYPE STRING,
BUKRS TYPE STRING,
SPARTE TYPE STRING,
ANLAGE TYPE STRING,
ANLART TYPE STRING,
KTOKLASSE TYPE STRING,
ABWVK TYPE STRING,
KOFIZ TYPE STRING,
ABLEINH TYPE STRING,
ABRVORG TYPE STRING,
ABRDATS TYPE STRING,
ZUORDDAA TYPE STRING,
BILLINGRUNNO TYPE STRING,
AUSGRUP TYPE STRING,
TARIFTYP TYPE STRING,
VALUE1 TYPE STRING,
VALUE2 TYPE STRING,
VALUE3 TYPE STRING,
VALUE4 TYPE STRING,
VALUE5 TYPE STRING,
TOBRELEASD TYPE STRING,
%_COLOR TYPE STRING,
BOX TYPE STRING,
MDUSREQUESTID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ERCHOD_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_ERCHOD_STR-BELNR sy-vline 
WA_ERCHOD_STR-GPARTNER sy-vline 
WA_ERCHOD_STR-BPINFO sy-vline 
WA_ERCHOD_STR-VKONT sy-vline 
WA_ERCHOD_STR-VERTRAG sy-vline 
WA_ERCHOD_STR-PORTION sy-vline 
WA_ERCHOD_STR-VALIDATION sy-vline 
WA_ERCHOD_STR-MANOUTSORT sy-vline 
WA_ERCHOD_STR-FREI_AM sy-vline 
WA_ERCHOD_STR-FREI_VON sy-vline 
WA_ERCHOD_STR-DEVIATION sy-vline 
WA_ERCHOD_STR-SIMULATION sy-vline 
WA_ERCHOD_STR-OUTCOUNT sy-vline 
WA_ERCHOD_STR-STORNODAT sy-vline 
WA_ERCHOD_STR-SIMULATED sy-vline 
WA_ERCHOD_STR-BUKRS sy-vline 
WA_ERCHOD_STR-SPARTE sy-vline 
WA_ERCHOD_STR-ANLAGE sy-vline 
WA_ERCHOD_STR-ANLART sy-vline 
WA_ERCHOD_STR-KTOKLASSE sy-vline 
WA_ERCHOD_STR-ABWVK sy-vline 
WA_ERCHOD_STR-KOFIZ sy-vline 
WA_ERCHOD_STR-ABLEINH sy-vline 
WA_ERCHOD_STR-ABRVORG sy-vline 
WA_ERCHOD_STR-ABRDATS sy-vline 
WA_ERCHOD_STR-ZUORDDAA sy-vline 
WA_ERCHOD_STR-BILLINGRUNNO sy-vline 
WA_ERCHOD_STR-AUSGRUP sy-vline 
WA_ERCHOD_STR-TARIFTYP sy-vline 
WA_ERCHOD_STR-VALUE1 sy-vline 
WA_ERCHOD_STR-VALUE2 sy-vline 
WA_ERCHOD_STR-VALUE3 sy-vline 
WA_ERCHOD_STR-VALUE4 sy-vline 
WA_ERCHOD_STR-VALUE5 sy-vline 
WA_ERCHOD_STR-TOBRELEASD sy-vline 
WA_ERCHOD_STR-%_COLOR sy-vline 
WA_ERCHOD_STR-BOX sy-vline 
WA_ERCHOD_STR-MDUSREQUESTID sy-vline      INTO ld_text SEPARATED BY SPACE.

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