ABAP Select data from SAP table E1EVMCST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1EVMCST 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 E1EVMCST. 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 E1EVMCST 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_E1EVMCST TYPE STANDARD TABLE OF E1EVMCST,
      WA_E1EVMCST TYPE E1EVMCST,
      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: <E1EVMCST> TYPE E1EVMCST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1EVMCST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1EVMCST
  INTO TABLE IT_E1EVMCST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1EVMCST
*  INTO TABLE @DATA(IT_E1EVMCST2).
*--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_E1EVMCST INDEX 1 INTO DATA(WA_E1EVMCST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1EVMCST ASSIGNING <E1EVMCST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1EVMCST>-CNFTYP = 1.
<E1EVMCST>-OBJTYP = 1.
<E1EVMCST>-OBJID = 1.
<E1EVMCST>-PARCOD = 1.
<E1EVMCST>-PARID = 1.

ENDLOOP.

LOOP AT IT_E1EVMCST INTO WA_E1EVMCST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1EVMCST-ITMTYP, sy-vline,
  WA_E1EVMCST-ITMID, sy-vline,
  WA_E1EVMCST-AMOUNT, sy-vline,
  WA_E1EVMCST-AMUNIT, sy-vline,
  WA_E1EVMCST-SRCCOD, sy-vline,
  WA_E1EVMCST-SRCID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1EVMCST 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_E1EVMCST 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_E1EVMCST INTO WA_E1EVMCST.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_E1EVMCST_STR, 
CNFTYP TYPE STRING,
OBJTYP TYPE STRING,
OBJID TYPE STRING,
PARCOD TYPE STRING,
PARID TYPE STRING,
ITMTYP TYPE STRING,
ITMID TYPE STRING,
AMOUNT TYPE STRING,
AMUNIT TYPE STRING,
SRCCOD TYPE STRING,
SRCID TYPE STRING,
SRCTX TYPE STRING,
LANGUAGE TYPE STRING,
CNFDAT TYPE STRING,
CNFTIM TYPE STRING,
CNFZON TYPE STRING,
CNFTST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1EVMCST_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_E1EVMCST_STR-CNFTYP sy-vline 
WA_E1EVMCST_STR-OBJTYP sy-vline 
WA_E1EVMCST_STR-OBJID sy-vline 
WA_E1EVMCST_STR-PARCOD sy-vline 
WA_E1EVMCST_STR-PARID sy-vline 
WA_E1EVMCST_STR-ITMTYP sy-vline 
WA_E1EVMCST_STR-ITMID sy-vline 
WA_E1EVMCST_STR-AMOUNT sy-vline 
WA_E1EVMCST_STR-AMUNIT sy-vline 
WA_E1EVMCST_STR-SRCCOD sy-vline 
WA_E1EVMCST_STR-SRCID sy-vline 
WA_E1EVMCST_STR-SRCTX sy-vline 
WA_E1EVMCST_STR-LANGUAGE sy-vline 
WA_E1EVMCST_STR-CNFDAT sy-vline 
WA_E1EVMCST_STR-CNFTIM sy-vline 
WA_E1EVMCST_STR-CNFZON sy-vline 
WA_E1EVMCST_STR-CNFTST sy-vline      INTO ld_text SEPARATED BY SPACE.

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