ABAP Select data from SAP table EADZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EADZ
*  INTO TABLE @DATA(IT_EADZ2).
*--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_EADZ INDEX 1 INTO DATA(WA_EADZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EADZ>-MANDT = 1.
<EADZ>-LOGIKZW = 1.
<EADZ>-BIS = 1.
<EADZ>-AB = 1.
<EADZ>-THGVER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EADZ-FESTTEMP, sy-vline,
  WA_EADZ-PROFEST, sy-vline,
  WA_EADZ-PROPROZ, sy-vline,
  WA_EADZ-ZEITRAUM, sy-vline,
  WA_EADZ-ERDAT, sy-vline,
  WA_EADZ-ERNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EADZ 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_EADZ 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_EADZ INTO WA_EADZ.


*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_EADZ_STR, 
MANDT TYPE STRING,
LOGIKZW TYPE STRING,
BIS TYPE STRING,
AB TYPE STRING,
THGVER TYPE STRING,
FESTTEMP TYPE STRING,
PROFEST TYPE STRING,
PROPROZ TYPE STRING,
ZEITRAUM TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
GASFACTOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EADZ_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_EADZ_STR-MANDT sy-vline 
WA_EADZ_STR-LOGIKZW sy-vline 
WA_EADZ_STR-BIS sy-vline 
WA_EADZ_STR-AB sy-vline 
WA_EADZ_STR-THGVER sy-vline 
WA_EADZ_STR-FESTTEMP sy-vline 
WA_EADZ_STR-PROFEST sy-vline 
WA_EADZ_STR-PROPROZ sy-vline 
WA_EADZ_STR-ZEITRAUM sy-vline 
WA_EADZ_STR-ERDAT sy-vline 
WA_EADZ_STR-ERNAM sy-vline 
WA_EADZ_STR-AEDAT sy-vline 
WA_EADZ_STR-AENAM sy-vline 
WA_EADZ_STR-GASFACTOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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