ABAP Select data from SAP table EWX031L_4X into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EWX031L_4X 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 EWX031L_4X. 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 EWX031L_4X 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_EWX031L_4X TYPE STANDARD TABLE OF EWX031L_4X,
      WA_EWX031L_4X TYPE EWX031L_4X,
      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: <EWX031L_4X> TYPE EWX031L_4X.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_EWX031L_4X.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM EWX031L_4X
  INTO TABLE IT_EWX031L_4X.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWX031L_4X
*  INTO TABLE @DATA(IT_EWX031L_4X2).
*--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_EWX031L_4X INDEX 1 INTO DATA(WA_EWX031L_4X2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_EWX031L_4X ASSIGNING <EWX031L_4X>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWX031L_4X>-TABNAME = 1.
<EWX031L_4X>-POSITION = 1.
<EWX031L_4X>-AG1 = 1.
<EWX031L_4X>-FLAG2 = 1.
<EWX031L_4X>-FLAG3 = 1.

ENDLOOP.

LOOP AT IT_EWX031L_4X INTO WA_EWX031L_4X.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWX031L_4X-FLAG4, sy-vline,
  WA_EWX031L_4X-DBTABPOS, sy-vline,
  WA_EWX031L_4X-FIELDTYPE, sy-vline,
  WA_EWX031L_4X-OFFSET, sy-vline,
  WA_EWX031L_4X-DBLENGTH, sy-vline,
  WA_EWX031L_4X-EXLENGTH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWX031L_4X 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_EWX031L_4X 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_EWX031L_4X INTO WA_EWX031L_4X.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_EWX031L_4X_STR, 
TABNAME TYPE STRING,
POSITION TYPE STRING,
AG1 TYPE STRING,
FLAG2 TYPE STRING,
FLAG3 TYPE STRING,
FLAG4 TYPE STRING,
DBTABPOS TYPE STRING,
FIELDTYPE TYPE STRING,
OFFSET TYPE STRING,
DBLENGTH TYPE STRING,
EXLENGTH TYPE STRING,
DECIMALS TYPE STRING,
DEPTH TYPE STRING,
FLDALIGN TYPE STRING,
FIELDNAME TYPE STRING,
ROLLNAME TYPE STRING,
ABTYPE TYPE STRING,
DTYP TYPE STRING,
EXID TYPE STRING,
REFTABLE TYPE STRING,
REFFIELD TYPE STRING,
PRECFIELD TYPE STRING,
CONVEXIT TYPE STRING,
MEMORYID TYPE STRING,
CHECKTABLE TYPE STRING,
DIGITS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWX031L_4X_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_EWX031L_4X_STR-TABNAME sy-vline 
WA_EWX031L_4X_STR-POSITION sy-vline 
WA_EWX031L_4X_STR-AG1 sy-vline 
WA_EWX031L_4X_STR-FLAG2 sy-vline 
WA_EWX031L_4X_STR-FLAG3 sy-vline 
WA_EWX031L_4X_STR-FLAG4 sy-vline 
WA_EWX031L_4X_STR-DBTABPOS sy-vline 
WA_EWX031L_4X_STR-FIELDTYPE sy-vline 
WA_EWX031L_4X_STR-OFFSET sy-vline 
WA_EWX031L_4X_STR-DBLENGTH sy-vline 
WA_EWX031L_4X_STR-EXLENGTH sy-vline 
WA_EWX031L_4X_STR-DECIMALS sy-vline 
WA_EWX031L_4X_STR-DEPTH sy-vline 
WA_EWX031L_4X_STR-FLDALIGN sy-vline 
WA_EWX031L_4X_STR-FIELDNAME sy-vline 
WA_EWX031L_4X_STR-ROLLNAME sy-vline 
WA_EWX031L_4X_STR-ABTYPE sy-vline 
WA_EWX031L_4X_STR-DTYP sy-vline 
WA_EWX031L_4X_STR-EXID sy-vline 
WA_EWX031L_4X_STR-REFTABLE sy-vline 
WA_EWX031L_4X_STR-REFFIELD sy-vline 
WA_EWX031L_4X_STR-PRECFIELD sy-vline 
WA_EWX031L_4X_STR-CONVEXIT sy-vline 
WA_EWX031L_4X_STR-MEMORYID sy-vline 
WA_EWX031L_4X_STR-CHECKTABLE sy-vline 
WA_EWX031L_4X_STR-DIGITS sy-vline      INTO ld_text SEPARATED BY SPACE.

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