ABAP Select data from SAP table /BEV3/CHLERF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /BEV3/CHLERF 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 /BEV3/CHLERF. 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 /BEV3/CHLERF 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_/BEV3/CHLERF TYPE STANDARD TABLE OF /BEV3/CHLERF,
      WA_/BEV3/CHLERF TYPE /BEV3/CHLERF,
      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: </BEV3/CHLERF> TYPE /BEV3/CHLERF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/BEV3/CHLERF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /BEV3/CHLERF
  INTO TABLE IT_/BEV3/CHLERF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /BEV3/CHLERF
*  INTO TABLE @DATA(IT_/BEV3/CHLERF2).
*--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_/BEV3/CHLERF INDEX 1 INTO DATA(WA_/BEV3/CHLERF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/BEV3/CHLERF ASSIGNING </BEV3/CHLERF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</BEV3/CHLERF>-MANDT = 1.
</BEV3/CHLERF>-YVWDNR = 1.
</BEV3/CHLERF>-YVOBJNR = 1.
</BEV3/CHLERF>-LEISTNR = 1.
</BEV3/CHLERF>-MODNR = 1.

ENDLOOP.

LOOP AT IT_/BEV3/CHLERF INTO WA_/BEV3/CHLERF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/BEV3/CHLERF-BUKRS, sy-vline,
  WA_/BEV3/CHLERF-LEISTART, sy-vline,
  WA_/BEV3/CHLERF-LEISTFORM, sy-vline,
  WA_/BEV3/CHLERF-LEISTTEXT, sy-vline,
  WA_/BEV3/CHLERF-WAERK, sy-vline,
  WA_/BEV3/CHLERF-GESAMTBTRG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/BEV3/CHLERF 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_/BEV3/CHLERF 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_/BEV3/CHLERF INTO WA_/BEV3/CHLERF.


*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 CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/BEV3/CHLERF-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/BEV3/CHLERF-MEINH.
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_/BEV3/CHLERF_STR, 
MANDT TYPE STRING,
YVWDNR TYPE STRING,
YVOBJNR TYPE STRING,
LEISTNR TYPE STRING,
MODNR TYPE STRING,
BUKRS TYPE STRING,
LEISTART TYPE STRING,
LEISTFORM TYPE STRING,
LEISTTEXT TYPE STRING,
WAERK TYPE STRING,
GESAMTBTRG TYPE STRING,
ABRECHBTRG TYPE STRING,
MEINH TYPE STRING,
BTRGPROME TYPE STRING,
GESMENGE TYPE STRING,
ANTMENGE TYPE STRING,
PROZBETRG TYPE STRING,
PROZMENGE TYPE STRING,
ABRZEITVON TYPE STRING,
ABRZEITBIS TYPE STRING,
STEUERKZ TYPE STRING,
URBELEG TYPE STRING,
STATUS TYPE STRING,
BENUTZER TYPE STRING,
DATUM TYPE STRING,
UHRZEIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/BEV3/CHLERF_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_/BEV3/CHLERF_STR-MANDT sy-vline 
WA_/BEV3/CHLERF_STR-YVWDNR sy-vline 
WA_/BEV3/CHLERF_STR-YVOBJNR sy-vline 
WA_/BEV3/CHLERF_STR-LEISTNR sy-vline 
WA_/BEV3/CHLERF_STR-MODNR sy-vline 
WA_/BEV3/CHLERF_STR-BUKRS sy-vline 
WA_/BEV3/CHLERF_STR-LEISTART sy-vline 
WA_/BEV3/CHLERF_STR-LEISTFORM sy-vline 
WA_/BEV3/CHLERF_STR-LEISTTEXT sy-vline 
WA_/BEV3/CHLERF_STR-WAERK sy-vline 
WA_/BEV3/CHLERF_STR-GESAMTBTRG sy-vline 
WA_/BEV3/CHLERF_STR-ABRECHBTRG sy-vline 
WA_/BEV3/CHLERF_STR-MEINH sy-vline 
WA_/BEV3/CHLERF_STR-BTRGPROME sy-vline 
WA_/BEV3/CHLERF_STR-GESMENGE sy-vline 
WA_/BEV3/CHLERF_STR-ANTMENGE sy-vline 
WA_/BEV3/CHLERF_STR-PROZBETRG sy-vline 
WA_/BEV3/CHLERF_STR-PROZMENGE sy-vline 
WA_/BEV3/CHLERF_STR-ABRZEITVON sy-vline 
WA_/BEV3/CHLERF_STR-ABRZEITBIS sy-vline 
WA_/BEV3/CHLERF_STR-STEUERKZ sy-vline 
WA_/BEV3/CHLERF_STR-URBELEG sy-vline 
WA_/BEV3/CHLERF_STR-STATUS sy-vline 
WA_/BEV3/CHLERF_STR-BENUTZER sy-vline 
WA_/BEV3/CHLERF_STR-DATUM sy-vline 
WA_/BEV3/CHLERF_STR-UHRZEIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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