ABAP Select data from SAP table COER_WA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COER_WA
*  INTO TABLE @DATA(IT_COER_WA2).
*--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_COER_WA INDEX 1 INTO DATA(WA_COER_WA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COER_WA>-OBJNR = 1.
<COER_WA>-OBJNR_OUT = 1.
<COER_WA>-VBELN = 1.
<COER_WA>-FKDPE = 1.
<COER_WA>-GJAHR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COER_WA-VRGNG, sy-vline,
  WA_COER_WA-WRTTP, sy-vline,
  WA_COER_WA-WTGBTR, sy-vline,
  WA_COER_WA-TWAER, sy-vline,
  WA_COER_WA-POSIT, sy-vline,
  WA_COER_WA-BUKRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COER_WA 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_COER_WA 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_COER_WA INTO WA_COER_WA.


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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_COER_WA-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COER_WA-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field WRTTP_PLAN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COER_WA-WRTTP_PLAN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COER_WA-WRTTP_PLAN.
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_COER_WA_STR, 
OBJNR TYPE STRING,
OBJNR_OUT TYPE STRING,
VBELN TYPE STRING,
FKDPE TYPE STRING,
GJAHR TYPE STRING,
VRGNG TYPE STRING,
WRTTP TYPE STRING,
WTGBTR TYPE STRING,
TWAER TYPE STRING,
POSIT TYPE STRING,
BUKRS TYPE STRING,
LEDNR TYPE STRING,
WLGBTR TYPE STRING,
LWAER TYPE STRING,
KSTAR TYPE STRING,
WRTTP_PLAN TYPE STRING,
WOGBTR TYPE STRING,
OWAER TYPE STRING,
WKGBTR TYPE STRING,
WAERS TYPE STRING,
KOKRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COER_WA_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_COER_WA_STR-OBJNR sy-vline 
WA_COER_WA_STR-OBJNR_OUT sy-vline 
WA_COER_WA_STR-VBELN sy-vline 
WA_COER_WA_STR-FKDPE sy-vline 
WA_COER_WA_STR-GJAHR sy-vline 
WA_COER_WA_STR-VRGNG sy-vline 
WA_COER_WA_STR-WRTTP sy-vline 
WA_COER_WA_STR-WTGBTR sy-vline 
WA_COER_WA_STR-TWAER sy-vline 
WA_COER_WA_STR-POSIT sy-vline 
WA_COER_WA_STR-BUKRS sy-vline 
WA_COER_WA_STR-LEDNR sy-vline 
WA_COER_WA_STR-WLGBTR sy-vline 
WA_COER_WA_STR-LWAER sy-vline 
WA_COER_WA_STR-KSTAR sy-vline 
WA_COER_WA_STR-WRTTP_PLAN sy-vline 
WA_COER_WA_STR-WOGBTR sy-vline 
WA_COER_WA_STR-OWAER sy-vline 
WA_COER_WA_STR-WKGBTR sy-vline 
WA_COER_WA_STR-WAERS sy-vline 
WA_COER_WA_STR-KOKRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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