ABAP Select data from SAP table ECHEVG_BPSEG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ECHEVG_BPSEG
*  INTO TABLE @DATA(IT_ECHEVG_BPSEG2).
*--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_ECHEVG_BPSEG INDEX 1 INTO DATA(WA_ECHEVG_BPSEG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ECHEVG_BPSEG>-MANDT = 1.
<ECHEVG_BPSEG>-EVGRP = 1.
<ECHEVG_BPSEG>-DOCFLG = 1.
<ECHEVG_BPSEG>-MTHFLG = 1.
<ECHEVG_BPSEG>-OPER1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ECHEVG_BPSEG-OPER2, sy-vline,
  WA_ECHEVG_BPSEG-OPER3, sy-vline,
  WA_ECHEVG_BPSEG-OPER4, sy-vline,
  WA_ECHEVG_BPSEG-OPER5, sy-vline,
  WA_ECHEVG_BPSEG-OPER6, sy-vline,
  WA_ECHEVG_BPSEG-OPER7, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ECHEVG_BPSEG 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_ECHEVG_BPSEG 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_ECHEVG_BPSEG INTO WA_ECHEVG_BPSEG.


*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_ECHEVG_BPSEG_STR, 
MANDT TYPE STRING,
EVGRP TYPE STRING,
DOCFLG TYPE STRING,
MTHFLG TYPE STRING,
OPER1 TYPE STRING,
OPER2 TYPE STRING,
OPER3 TYPE STRING,
OPER4 TYPE STRING,
OPER5 TYPE STRING,
OPER6 TYPE STRING,
OPER7 TYPE STRING,
OPER8 TYPE STRING,
OPER9 TYPE STRING,
OPER10 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ECHEVG_BPSEG_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_ECHEVG_BPSEG_STR-MANDT sy-vline 
WA_ECHEVG_BPSEG_STR-EVGRP sy-vline 
WA_ECHEVG_BPSEG_STR-DOCFLG sy-vline 
WA_ECHEVG_BPSEG_STR-MTHFLG sy-vline 
WA_ECHEVG_BPSEG_STR-OPER1 sy-vline 
WA_ECHEVG_BPSEG_STR-OPER2 sy-vline 
WA_ECHEVG_BPSEG_STR-OPER3 sy-vline 
WA_ECHEVG_BPSEG_STR-OPER4 sy-vline 
WA_ECHEVG_BPSEG_STR-OPER5 sy-vline 
WA_ECHEVG_BPSEG_STR-OPER6 sy-vline 
WA_ECHEVG_BPSEG_STR-OPER7 sy-vline 
WA_ECHEVG_BPSEG_STR-OPER8 sy-vline 
WA_ECHEVG_BPSEG_STR-OPER9 sy-vline 
WA_ECHEVG_BPSEG_STR-OPER10 sy-vline      INTO ld_text SEPARATED BY SPACE.

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