ABAP Select data from SAP table EWAALYCYYC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWAALYCYYC
*  INTO TABLE @DATA(IT_EWAALYCYYC2).
*--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_EWAALYCYYC INDEX 1 INTO DATA(WA_EWAALYCYYC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWAALYCYYC>-MANDT = 1.
<EWAALYCYYC>-PLANT = 1.
<EWAALYCYYC>-DESCRIPTION = 1.
<EWAALYCYYC>-WASTE = 1.
<EWAALYCYYC>-LICENSENUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWAALYCYYC-WEIGHINGDATE, sy-vline,
  WA_EWAALYCYYC-WEIGHINGTIME, sy-vline,
  WA_EWAALYCYYC-PROCESSTYPE, sy-vline,
  WA_EWAALYCYYC-CREATED, sy-vline,
  WA_EWAALYCYYC-COMPLETED, sy-vline,
  WA_EWAALYCYYC-CANCELED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWAALYCYYC 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_EWAALYCYYC 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_EWAALYCYYC INTO WA_EWAALYCYYC.


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

*Conversion exit MATN1, internal->external for field WASTE
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_EWAALYCYYC-WASTE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAALYCYYC-WASTE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAALYCYYC-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAALYCYYC-KUNNR.
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_EWAALYCYYC_STR, 
MANDT TYPE STRING,
PLANT TYPE STRING,
DESCRIPTION TYPE STRING,
WASTE TYPE STRING,
LICENSENUMBER TYPE STRING,
WEIGHINGDATE TYPE STRING,
WEIGHINGTIME TYPE STRING,
PROCESSTYPE TYPE STRING,
CREATED TYPE STRING,
COMPLETED TYPE STRING,
CANCELED TYPE STRING,
CREATEDPLANT TYPE STRING,
COMPLETEDPLANT TYPE STRING,
CANCELEDPLANT TYPE STRING,
KUNNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWAALYCYYC_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_EWAALYCYYC_STR-MANDT sy-vline 
WA_EWAALYCYYC_STR-PLANT sy-vline 
WA_EWAALYCYYC_STR-DESCRIPTION sy-vline 
WA_EWAALYCYYC_STR-WASTE sy-vline 
WA_EWAALYCYYC_STR-LICENSENUMBER sy-vline 
WA_EWAALYCYYC_STR-WEIGHINGDATE sy-vline 
WA_EWAALYCYYC_STR-WEIGHINGTIME sy-vline 
WA_EWAALYCYYC_STR-PROCESSTYPE sy-vline 
WA_EWAALYCYYC_STR-CREATED sy-vline 
WA_EWAALYCYYC_STR-COMPLETED sy-vline 
WA_EWAALYCYYC_STR-CANCELED sy-vline 
WA_EWAALYCYYC_STR-CREATEDPLANT sy-vline 
WA_EWAALYCYYC_STR-COMPLETEDPLANT sy-vline 
WA_EWAALYCYYC_STR-CANCELEDPLANT sy-vline 
WA_EWAALYCYYC_STR-KUNNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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