ABAP Select data from SAP table CES_WAO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CES_WAO
*  INTO TABLE @DATA(IT_CES_WAO2).
*--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_CES_WAO INDEX 1 INTO DATA(WA_CES_WAO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CES_WAO>-KTOPL = 1.
<CES_WAO>-KOKRS = 1.
<CES_WAO>-KSTAR = 1.
<CES_WAO>-KTEXT = 1.
<CES_WAO>-DATAB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CES_WAO-DATBI, sy-vline,
  WA_CES_WAO-ERSDA, sy-vline,
  WA_CES_WAO-USNAM, sy-vline,
  WA_CES_WAO-KATYP, sy-vline,
  WA_CES_WAO-HANDLE, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_CES_WAO 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_CES_WAO 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_CES_WAO INTO WA_CES_WAO.


*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 KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CES_WAO-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CES_WAO-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KATYP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CES_WAO-KATYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CES_WAO-KATYP.
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_CES_WAO_STR, 
KTOPL TYPE STRING,
KOKRS TYPE STRING,
KSTAR TYPE STRING,
KTEXT TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
ERSDA TYPE STRING,
USNAM TYPE STRING,
KATYP TYPE STRING,
HANDLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CES_WAO_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_CES_WAO_STR-KTOPL sy-vline 
WA_CES_WAO_STR-KOKRS sy-vline 
WA_CES_WAO_STR-KSTAR sy-vline 
WA_CES_WAO_STR-KTEXT sy-vline 
WA_CES_WAO_STR-DATAB sy-vline 
WA_CES_WAO_STR-DATBI sy-vline 
WA_CES_WAO_STR-ERSDA sy-vline 
WA_CES_WAO_STR-USNAM sy-vline 
WA_CES_WAO_STR-KATYP sy-vline 
WA_CES_WAO_STR-HANDLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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