ABAP Select data from SAP table ERCHC_STABLE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ERCHC_STABLE
*  INTO TABLE @DATA(IT_ERCHC_STABLE2).
*--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_ERCHC_STABLE INDEX 1 INTO DATA(WA_ERCHC_STABLE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ERCHC_STABLE>-MANDT = 1.
<ERCHC_STABLE>-BELNR = 1.
<ERCHC_STABLE>-LFDNR = 1.
<ERCHC_STABLE>-OPBEL = 1.
<ERCHC_STABLE>-CPUDT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ERCHC_STABLE-BUDAT, sy-vline,
  WA_ERCHC_STABLE-INTOPBEL, sy-vline,
  WA_ERCHC_STABLE-INTCPUDT, sy-vline,
  WA_ERCHC_STABLE-INTBUDAT, sy-vline,
  WA_ERCHC_STABLE-TOBRELEASD, sy-vline,
  WA_ERCHC_STABLE-SIMULATED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ERCHC_STABLE 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_ERCHC_STABLE 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_ERCHC_STABLE INTO WA_ERCHC_STABLE.


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

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

*Conversion exit ALPHA, internal->external for field INTOPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ERCHC_STABLE-INTOPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERCHC_STABLE-INTOPBEL.
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_ERCHC_STABLE_STR, 
MANDT TYPE STRING,
BELNR TYPE STRING,
LFDNR TYPE STRING,
OPBEL TYPE STRING,
CPUDT TYPE STRING,
BUDAT TYPE STRING,
INTOPBEL TYPE STRING,
INTCPUDT TYPE STRING,
INTBUDAT TYPE STRING,
TOBRELEASD TYPE STRING,
SIMULATED TYPE STRING,
INVOICED TYPE STRING,
SPCANC TYPE STRING,
STATUPD TYPE STRING,
STATUPD_CANC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ERCHC_STABLE_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_ERCHC_STABLE_STR-MANDT sy-vline 
WA_ERCHC_STABLE_STR-BELNR sy-vline 
WA_ERCHC_STABLE_STR-LFDNR sy-vline 
WA_ERCHC_STABLE_STR-OPBEL sy-vline 
WA_ERCHC_STABLE_STR-CPUDT sy-vline 
WA_ERCHC_STABLE_STR-BUDAT sy-vline 
WA_ERCHC_STABLE_STR-INTOPBEL sy-vline 
WA_ERCHC_STABLE_STR-INTCPUDT sy-vline 
WA_ERCHC_STABLE_STR-INTBUDAT sy-vline 
WA_ERCHC_STABLE_STR-TOBRELEASD sy-vline 
WA_ERCHC_STABLE_STR-SIMULATED sy-vline 
WA_ERCHC_STABLE_STR-INVOICED sy-vline 
WA_ERCHC_STABLE_STR-SPCANC sy-vline 
WA_ERCHC_STABLE_STR-STATUPD sy-vline 
WA_ERCHC_STABLE_STR-STATUPD_CANC sy-vline      INTO ld_text SEPARATED BY SPACE.

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