ABAP Select data from SAP table ERCH_ERCHO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ERCH_ERCHO
*  INTO TABLE @DATA(IT_ERCH_ERCHO2).
*--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_ERCH_ERCHO INDEX 1 INTO DATA(WA_ERCH_ERCHO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ERCH_ERCHO>-BELNR = 1.
<ERCH_ERCHO>-BUKRS = 1.
<ERCH_ERCHO>-SPARTE = 1.
<ERCH_ERCHO>-GPARTNER = 1.
<ERCH_ERCHO>-VKONT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ERCH_ERCHO-VERTRAG, sy-vline,
  WA_ERCH_ERCHO-ABRDATS, sy-vline,
  WA_ERCH_ERCHO-ABWVK, sy-vline,
  WA_ERCH_ERCHO-STORNODAT, sy-vline,
  WA_ERCH_ERCHO-ABRVORG, sy-vline,
  WA_ERCH_ERCHO-KOFIZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ERCH_ERCHO 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_ERCH_ERCHO 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_ERCH_ERCHO INTO WA_ERCH_ERCHO.


*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_ERCH_ERCHO-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCH_ERCHO-BELNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field BILLINGRUNNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ERCH_ERCHO-BILLINGRUNNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCH_ERCHO-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_ERCH_ERCHO_STR, 
BELNR TYPE STRING,
BUKRS TYPE STRING,
SPARTE TYPE STRING,
GPARTNER TYPE STRING,
VKONT TYPE STRING,
VERTRAG TYPE STRING,
ABRDATS TYPE STRING,
ABWVK TYPE STRING,
STORNODAT TYPE STRING,
ABRVORG TYPE STRING,
KOFIZ TYPE STRING,
PORTION TYPE STRING,
SIMULATION TYPE STRING,
TOBRELEASD TYPE STRING,
ABLEINH TYPE STRING,
ZUORDDAA TYPE STRING,
KTOKLASSE TYPE STRING,
BILLINGRUNNO TYPE STRING,
OUTCNSO TYPE STRING,
VALIDATION TYPE STRING,
MANOUTSORT TYPE STRING,
FREI_AM TYPE STRING,
FREI_VON TYPE STRING,
DEVIATION TYPE STRING,
OUTCOUNT TYPE STRING,
MDUSREQUESTID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ERCH_ERCHO_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_ERCH_ERCHO_STR-BELNR sy-vline 
WA_ERCH_ERCHO_STR-BUKRS sy-vline 
WA_ERCH_ERCHO_STR-SPARTE sy-vline 
WA_ERCH_ERCHO_STR-GPARTNER sy-vline 
WA_ERCH_ERCHO_STR-VKONT sy-vline 
WA_ERCH_ERCHO_STR-VERTRAG sy-vline 
WA_ERCH_ERCHO_STR-ABRDATS sy-vline 
WA_ERCH_ERCHO_STR-ABWVK sy-vline 
WA_ERCH_ERCHO_STR-STORNODAT sy-vline 
WA_ERCH_ERCHO_STR-ABRVORG sy-vline 
WA_ERCH_ERCHO_STR-KOFIZ sy-vline 
WA_ERCH_ERCHO_STR-PORTION sy-vline 
WA_ERCH_ERCHO_STR-SIMULATION sy-vline 
WA_ERCH_ERCHO_STR-TOBRELEASD sy-vline 
WA_ERCH_ERCHO_STR-ABLEINH sy-vline 
WA_ERCH_ERCHO_STR-ZUORDDAA sy-vline 
WA_ERCH_ERCHO_STR-KTOKLASSE sy-vline 
WA_ERCH_ERCHO_STR-BILLINGRUNNO sy-vline 
WA_ERCH_ERCHO_STR-OUTCNSO sy-vline 
WA_ERCH_ERCHO_STR-VALIDATION sy-vline 
WA_ERCH_ERCHO_STR-MANOUTSORT sy-vline 
WA_ERCH_ERCHO_STR-FREI_AM sy-vline 
WA_ERCH_ERCHO_STR-FREI_VON sy-vline 
WA_ERCH_ERCHO_STR-DEVIATION sy-vline 
WA_ERCH_ERCHO_STR-OUTCOUNT sy-vline 
WA_ERCH_ERCHO_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.