ABAP Select data from SAP table E3T438R into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E3T438R 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 E3T438R. 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 E3T438R 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_E3T438R TYPE STANDARD TABLE OF E3T438R,
      WA_E3T438R TYPE E3T438R,
      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: <E3T438R> TYPE E3T438R.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E3T438R.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E3T438R
  INTO TABLE IT_E3T438R.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E3T438R
*  INTO TABLE @DATA(IT_E3T438R2).
*--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_E3T438R INDEX 1 INTO DATA(WA_E3T438R2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E3T438R ASSIGNING <E3T438R>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E3T438R>-MSGFN = 1.
<E3T438R>-WERKS = 1.
<E3T438R>-RWPRO = 1.
<E3T438R>-RWPER = 1.
<E3T438R>-RWANZ = 1.

ENDLOOP.

LOOP AT IT_E3T438R INTO WA_E3T438R.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E3T438R-RWART, sy-vline,
  WA_E3T438R-RWNTG, sy-vline,
  WA_E3T438R-RW1TG, sy-vline,
  WA_E3T438R-RW1PR, sy-vline,
  WA_E3T438R-RW2TG, sy-vline,
  WA_E3T438R-RW2PR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E3T438R 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_E3T438R 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_E3T438R INTO WA_E3T438R.


*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_E3T438R_STR, 
MSGFN TYPE STRING,
WERKS TYPE STRING,
RWPRO TYPE STRING,
RWPER TYPE STRING,
RWANZ TYPE STRING,
RWART TYPE STRING,
RWNTG TYPE STRING,
RW1TG TYPE STRING,
RW1PR TYPE STRING,
RW2TG TYPE STRING,
RW2PR TYPE STRING,
RW3TG TYPE STRING,
MIRW1 TYPE STRING,
MIRW2 TYPE STRING,
MIRW3 TYPE STRING,
MARW1 TYPE STRING,
MARW2 TYPE STRING,
MARW3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E3T438R_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_E3T438R_STR-MSGFN sy-vline 
WA_E3T438R_STR-WERKS sy-vline 
WA_E3T438R_STR-RWPRO sy-vline 
WA_E3T438R_STR-RWPER sy-vline 
WA_E3T438R_STR-RWANZ sy-vline 
WA_E3T438R_STR-RWART sy-vline 
WA_E3T438R_STR-RWNTG sy-vline 
WA_E3T438R_STR-RW1TG sy-vline 
WA_E3T438R_STR-RW1PR sy-vline 
WA_E3T438R_STR-RW2TG sy-vline 
WA_E3T438R_STR-RW2PR sy-vline 
WA_E3T438R_STR-RW3TG sy-vline 
WA_E3T438R_STR-MIRW1 sy-vline 
WA_E3T438R_STR-MIRW2 sy-vline 
WA_E3T438R_STR-MIRW3 sy-vline 
WA_E3T438R_STR-MARW1 sy-vline 
WA_E3T438R_STR-MARW2 sy-vline 
WA_E3T438R_STR-MARW3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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