ABAP Select data from SAP table EWAEL_SAMPLE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWAEL_SAMPLE
*  INTO TABLE @DATA(IT_EWAEL_SAMPLE2).
*--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_EWAEL_SAMPLE INDEX 1 INTO DATA(WA_EWAEL_SAMPLE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWAEL_SAMPLE>-MANDT = 1.
<EWAEL_SAMPLE>-SAMPLENR = 1.
<EWAEL_SAMPLE>-WASTE = 1.
<EWAEL_SAMPLE>-VSTELLE = 1.
<EWAEL_SAMPLE>-SERVLOC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWAEL_SAMPLE-CREATED, sy-vline,
  WA_EWAEL_SAMPLE-CLOSED, sy-vline,
  WA_EWAEL_SAMPLE-DESTROYED, sy-vline,
  WA_EWAEL_SAMPLE-APPEARANCE, sy-vline,
  WA_EWAEL_SAMPLE-CONSISTENCE, sy-vline,
  WA_EWAEL_SAMPLE-COLOUR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWAEL_SAMPLE 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_EWAEL_SAMPLE 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_EWAEL_SAMPLE INTO WA_EWAEL_SAMPLE.


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

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

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

*Conversion exit TPLNR, internal->external for field SERVLOC
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_EWAEL_SAMPLE-SERVLOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAEL_SAMPLE-SERVLOC.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field ADDRNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWAEL_SAMPLE-ADDRNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAEL_SAMPLE-ADDRNUMBER.
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_EWAEL_SAMPLE_STR, 
MANDT TYPE STRING,
SAMPLENR TYPE STRING,
WASTE TYPE STRING,
VSTELLE TYPE STRING,
SERVLOC TYPE STRING,
CREATED TYPE STRING,
CLOSED TYPE STRING,
DESTROYED TYPE STRING,
APPEARANCE TYPE STRING,
CONSISTENCE TYPE STRING,
COLOUR TYPE STRING,
SMELL TYPE STRING,
WEIGHINGNR TYPE STRING,
ISRETAINSAMPLE TYPE STRING,
ISREJECTED TYPE STRING,
STATEMENT TYPE STRING,
STATUS_ICON TYPE STRING,
WASTETX TYPE STRING,
ADDRNUMBER TYPE STRING,
TITLE TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME_TXT TYPE STRING,
CITY1 TYPE STRING,
CITY2 TYPE STRING,
POST_CODE1 TYPE STRING,
COUNTRY TYPE STRING,
STREET TYPE STRING,
HOUSE_NUM1 TYPE STRING,
REGION TYPE STRING,
ADDR_SHORT TYPE STRING,
DLG_CLOSED TYPE STRING,
DLG_ISREJECTED TYPE STRING,
DLG_CREATEDELIVERYBAN TYPE STRING,
DLG_DESTROYED TYPE STRING,
DLG_OK_CODE TYPE STRING,
GROUPTEXT_ORIGIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWAEL_SAMPLE_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_EWAEL_SAMPLE_STR-MANDT sy-vline 
WA_EWAEL_SAMPLE_STR-SAMPLENR sy-vline 
WA_EWAEL_SAMPLE_STR-WASTE sy-vline 
WA_EWAEL_SAMPLE_STR-VSTELLE sy-vline 
WA_EWAEL_SAMPLE_STR-SERVLOC sy-vline 
WA_EWAEL_SAMPLE_STR-CREATED sy-vline 
WA_EWAEL_SAMPLE_STR-CLOSED sy-vline 
WA_EWAEL_SAMPLE_STR-DESTROYED sy-vline 
WA_EWAEL_SAMPLE_STR-APPEARANCE sy-vline 
WA_EWAEL_SAMPLE_STR-CONSISTENCE sy-vline 
WA_EWAEL_SAMPLE_STR-COLOUR sy-vline 
WA_EWAEL_SAMPLE_STR-SMELL sy-vline 
WA_EWAEL_SAMPLE_STR-WEIGHINGNR sy-vline 
WA_EWAEL_SAMPLE_STR-ISRETAINSAMPLE sy-vline 
WA_EWAEL_SAMPLE_STR-ISREJECTED sy-vline 
WA_EWAEL_SAMPLE_STR-STATEMENT sy-vline 
WA_EWAEL_SAMPLE_STR-STATUS_ICON sy-vline 
WA_EWAEL_SAMPLE_STR-WASTETX sy-vline 
WA_EWAEL_SAMPLE_STR-ADDRNUMBER sy-vline 
WA_EWAEL_SAMPLE_STR-TITLE sy-vline 
WA_EWAEL_SAMPLE_STR-NAME1 sy-vline 
WA_EWAEL_SAMPLE_STR-NAME2 sy-vline 
WA_EWAEL_SAMPLE_STR-NAME_TXT sy-vline 
WA_EWAEL_SAMPLE_STR-CITY1 sy-vline 
WA_EWAEL_SAMPLE_STR-CITY2 sy-vline 
WA_EWAEL_SAMPLE_STR-POST_CODE1 sy-vline 
WA_EWAEL_SAMPLE_STR-COUNTRY sy-vline 
WA_EWAEL_SAMPLE_STR-STREET sy-vline 
WA_EWAEL_SAMPLE_STR-HOUSE_NUM1 sy-vline 
WA_EWAEL_SAMPLE_STR-REGION sy-vline 
WA_EWAEL_SAMPLE_STR-ADDR_SHORT sy-vline 
WA_EWAEL_SAMPLE_STR-DLG_CLOSED sy-vline 
WA_EWAEL_SAMPLE_STR-DLG_ISREJECTED sy-vline 
WA_EWAEL_SAMPLE_STR-DLG_CREATEDELIVERYBAN sy-vline 
WA_EWAEL_SAMPLE_STR-DLG_DESTROYED sy-vline 
WA_EWAEL_SAMPLE_STR-DLG_OK_CODE sy-vline 
WA_EWAEL_SAMPLE_STR-GROUPTEXT_ORIGIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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