ABAP Select data from SAP table COEPL_ONLY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COEPL_ONLY
*  INTO TABLE @DATA(IT_COEPL_ONLY2).
*--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_COEPL_ONLY INDEX 1 INTO DATA(WA_COEPL_ONLY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COEPL_ONLY>-PERIO = 1.
<COEPL_ONLY>-MEINH = 1.
<COEPL_ONLY>-LSTBTR = 1.
<COEPL_ONLY>-MEINB = 1.
<COEPL_ONLY>-LSBBTR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COEPL_ONLY-KAPBTR, sy-vline,
  WA_COEPL_ONLY-AUSEH, sy-vline,
  WA_COEPL_ONLY-AUSBTR, sy-vline,
  WA_COEPL_ONLY-AUBEH, sy-vline,
  WA_COEPL_ONLY-AUBBTR, sy-vline,
  WA_COEPL_ONLY-DISBTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COEPL_ONLY 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_COEPL_ONLY 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_COEPL_ONLY INTO WA_COEPL_ONLY.


*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_COEPL_ONLY-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COEPL_ONLY-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINB
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_COEPL_ONLY-MEINB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COEPL_ONLY-MEINB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field AUSEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_COEPL_ONLY-AUSEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COEPL_ONLY-AUSEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field AUBEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_COEPL_ONLY-AUBEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COEPL_ONLY-AUBEH.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field LOGSYSO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COEPL_ONLY-LOGSYSO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COEPL_ONLY-LOGSYSO.
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_COEPL_ONLY_STR, 
PERIO TYPE STRING,
MEINH TYPE STRING,
LSTBTR TYPE STRING,
MEINB TYPE STRING,
LSBBTR TYPE STRING,
KAPBTR TYPE STRING,
AUSEH TYPE STRING,
AUSBTR TYPE STRING,
AUBEH TYPE STRING,
AUBBTR TYPE STRING,
DISBTR TYPE STRING,
LEDNR TYPE STRING,
OBJNR TYPE STRING,
GJAHR TYPE STRING,
WRTTP TYPE STRING,
VERSN TYPE STRING,
VRGNG TYPE STRING,
SGTXT TYPE STRING,
REFBZ TYPE STRING,
ZLENR TYPE STRING,
AEQBTR TYPE STRING,
LOGSYSO TYPE STRING,
BVALTNR TYPE STRING,
PERNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COEPL_ONLY_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_COEPL_ONLY_STR-PERIO sy-vline 
WA_COEPL_ONLY_STR-MEINH sy-vline 
WA_COEPL_ONLY_STR-LSTBTR sy-vline 
WA_COEPL_ONLY_STR-MEINB sy-vline 
WA_COEPL_ONLY_STR-LSBBTR sy-vline 
WA_COEPL_ONLY_STR-KAPBTR sy-vline 
WA_COEPL_ONLY_STR-AUSEH sy-vline 
WA_COEPL_ONLY_STR-AUSBTR sy-vline 
WA_COEPL_ONLY_STR-AUBEH sy-vline 
WA_COEPL_ONLY_STR-AUBBTR sy-vline 
WA_COEPL_ONLY_STR-DISBTR sy-vline 
WA_COEPL_ONLY_STR-LEDNR sy-vline 
WA_COEPL_ONLY_STR-OBJNR sy-vline 
WA_COEPL_ONLY_STR-GJAHR sy-vline 
WA_COEPL_ONLY_STR-WRTTP sy-vline 
WA_COEPL_ONLY_STR-VERSN sy-vline 
WA_COEPL_ONLY_STR-VRGNG sy-vline 
WA_COEPL_ONLY_STR-SGTXT sy-vline 
WA_COEPL_ONLY_STR-REFBZ sy-vline 
WA_COEPL_ONLY_STR-ZLENR sy-vline 
WA_COEPL_ONLY_STR-AEQBTR sy-vline 
WA_COEPL_ONLY_STR-LOGSYSO sy-vline 
WA_COEPL_ONLY_STR-BVALTNR sy-vline 
WA_COEPL_ONLY_STR-PERNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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