ABAP Select data from SAP table EASTL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EASTL
*  INTO TABLE @DATA(IT_EASTL2).
*--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_EASTL INDEX 1 INTO DATA(WA_EASTL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EASTL>-MANDT = 1.
<EASTL>-ANLAGE = 1.
<EASTL>-LOGIKNR = 1.
<EASTL>-BIS = 1.
<EASTL>-AB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EASTL-PREISKLA, sy-vline,
  WA_EASTL-GVERRECH, sy-vline,
  WA_EASTL-TARIFART, sy-vline,
  WA_EASTL-KONDIGR, sy-vline,
  WA_EASTL-ERDAT, sy-vline,
  WA_EASTL-ERNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EASTL 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_EASTL 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_EASTL INTO WA_EASTL.


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

*Conversion exit ALPHA, internal->external for field PREISKLA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EASTL-PREISKLA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EASTL-PREISKLA.
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_EASTL_STR, 
MANDT TYPE STRING,
ANLAGE TYPE STRING,
LOGIKNR TYPE STRING,
BIS TYPE STRING,
AB TYPE STRING,
PREISKLA TYPE STRING,
GVERRECH TYPE STRING,
TARIFART TYPE STRING,
KONDIGR TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
DEVICE_NBR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EASTL_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_EASTL_STR-MANDT sy-vline 
WA_EASTL_STR-ANLAGE sy-vline 
WA_EASTL_STR-LOGIKNR sy-vline 
WA_EASTL_STR-BIS sy-vline 
WA_EASTL_STR-AB sy-vline 
WA_EASTL_STR-PREISKLA sy-vline 
WA_EASTL_STR-GVERRECH sy-vline 
WA_EASTL_STR-TARIFART sy-vline 
WA_EASTL_STR-KONDIGR sy-vline 
WA_EASTL_STR-ERDAT sy-vline 
WA_EASTL_STR-ERNAM sy-vline 
WA_EASTL_STR-AEDAT sy-vline 
WA_EASTL_STR-AENAM sy-vline 
WA_EASTL_STR-DEVICE_NBR sy-vline      INTO ld_text SEPARATED BY SPACE.

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